Brake Control

BRAKE CONTROL VEHICLE STABILITY CONTROL SYSTEM
BC1
BC
VEHICLE STABILITY CONTROL
SYSTEM
PRECAUTION
1. TROUBLESHOOTING PRECAUTION
When there is a malfunction in the contact points of
the terminals or installation problems with parts,
removal and reinstallation of the suspected problem
parts may return the system to its normal condition
either completely or temporarily.
In order to determine the location of the malfunction,
be sure to check the engine conditions at the time the
malfunction occurred, through data such as DTC and
freeze frame data outputs. Record this information
before disconnecting any connectors and removing or
installing any parts.
Since the Vehicle Stability Control system may be
influenced by malfunctions in other systems, be sure
to check for DTCs in other systems.
Be sure to remove and reinstall the hydraulic brake
booster and each sensor with the ignition switch OFF
unless specified in the inspection procedure.
When removing and installing the hydraulic brake
booster and each sensor, be sure to check that the
normal display is output during a test mode inspection
and a DTC output inspection after reinstalling all the
parts.
After replacing the master cylinder solenoid (skid
control ECU) and/or the yaw rate sensor and
deceleration sensor, be sure to perform the yaw rate
sensor and deceleration sensor zero point calibration
(See page BC-24).
The CAN communication system is used for data
communication between the skid control ECU, the
steering angle sensor, and the yaw rate sensor (the
deceleration sensor is included).
If there is trouble in the CAN communication line, the
DTC relating to the communication line is output. If a
DTC relating to the CAN communication line is output,
repair the malfunction in the communication line and
troubleshoot the Vehicle Stability Control system.
Since the CAN communication line has a specific
length and route, it cannot be repaired temporarily
with a bypass wire.
BC2
BC
2. DISCONNECT AND RECONNECT CABLE OF
NEGATIVE BATTERY TERMINAL
(a) Before performing electronic work, disconnect the
cable from the negative (-) battery terminal in order
to prevent it from shorting and burning out.
(b) Before disconnecting and reconnecting the battery
cable, turn the ignition switch OFF and the headlight
dimmer switch OFF. Then loosen the terminal nut
completely. Do not damage the cable or terminal.
(c) When the battery cable is disconnected, the clock
and radio settings and stored DTCs are erased.
Therefore, before disconnecting the battery cable,
make a note of them.
NOTICE:
When the cable is disconnected from the negative (-)
battery terminal, initialize the following system(s) after
the cable is reconnected.
Negative (-)
Battery Terminal
Cable
D033496E01
System name See procedure
METER / GAUGE SYSTEM ME-10
BC3
BC
PARTS LOCATION
FRONT SPEED
SENSOR RH
FRONT SPEED
SENSOR LH
FRONT SPEED
SENSOR ROTOR LH
FRONT SPEED
SENSOR ROTOR RH
HYDRAULIC BRAKE BOOSTER
-MASTER CYLINDER SOLENOID
(SKID CONTROL ECU)
-BRAKE FLUID LEVEL
WARNING SWITCH
ENGINE ROOM R/B NO. 2
-STOP FUSE
-STOP LP CTRL RELAY
-ABS SOL FUSE
-AM2 FUSE
-ABS MTR FUSE
PARK/NEUTRAL
POSITION SWITCH (*2)
TRANSFER INDICATOR SWITCH (*1)
A/T: (4WD POSITION)
M/T: (CENTER DIFFERENTIAL
LOCK POSITION)
TRANSFER INDICATOR SWITCH (*1)
(L4 POSITION)
SKID CONTROL
SENSOR WIRE LH
SKID CONTROL
SENSOR WIRE RH
*1: 4WD + A/T
*2: 4WD
*3: A/T
C129372E01
BC4
BC
REAR SPEED SENSOR RH
REAR SPEED SENSOR LH
REAR SPEED SENSOR
ROTOR RH
REAR SPEED
SENSOR ROTOR LH
SKID CONTROL SENSOR WIRE
REAR DIFFERENTIAL LOCK
INDICATOR SWITCH
C139135E01
BC5
BC
STEERING
ANGLE SENSOR
YAW RATE AND
DECELERATION
SENSOR
STOP LIGHT SWITCH
DLC3
COMBINATION METER
- ABS WARNING LIGHT
- VSC TRAC WARNING LIGHT
- BRAKE WARNING LIGHT
- VSC OFF INDICATOR LIGHT (*1), (*2)
- SLIP INDICATOR LIGHT
- AUTO LSD INDICATOR LIGHT (*3)
- A-TRAC INDICATOR LIGHT (*4)
MAIN BODY ECU (DRIVER SIDE J/B)
- ECU-IG FUSE
- IGN FUSE
- IG1 FUSE
SKID
CONTROL
BUZZER
FOUR WHEEL DRIVE
CONTROL ECU (*6)
ECM
FOUR WHEEL DRIVE
CONTROL ECU (*1)
AUTO LSD SWITCH (*3)
A-TRAC SWITCH (*4)
REAR DIFFERENTIAL
LOCK SWITCH (*5)
*1: 2WD with rear differential lock
*3: with AUTO LSD
*4: with A-TRAC
*2: 4WD
*5: with rear differential lock
*6: 4WD + A/T
PARKING BRAKE SWITCH
C135288E01
BC6
BC
SYSTEM DIAGRAM
Hydraulic Brake Booster
Master Cylinder Solenoid
Motor Relay
Pump Motor
Speed Sensor
(Each Speed Sensor)
Stop Light Switch
Stop LP CTRL
Relay
Parking Brake Switch
Brake Fluid Level
Warning Switch
AUTO LSD Switch
(*1)
Skid Control ECU
Solenoid Relay
Accumulator
Pressure
Sensor
Solenoid (Control)
Solenoid (Switching)
Master Cylinder
Pressure Sensor
*1: w/ AUTO LSD
C129374E01
BC7
BC
A-TRAC Switch (*2)
Rear Differential Lock
Indicator Switch (*3)
Transfer Indicator
Switch (L4 Position)
(*5)
Park/Neutral Position
Switch (*4)
ADD Actuator (*5)
Transfer Indicator
Switch (Center
Differential Lock
Position) (*6)
Combination Meter
ABS Warning Light
VSC TRAC Warning Light
Brake Warning Light
SLIP Indicator Light
VSC OFF Indicator Light
AUTO LSD Indicator Light (*1)
A-TRAC Indicator Light
Speedometer
*1: w/ AUTO LSD
*2: w/ A-TRAC
*3: 4WD
*4: A/T
*5: 4WD + A/T
*6: 4WD + M/T
Skid
Control
ECU
C129375E01
BC8
BC
Transmitting ECU (Transmitter) Receiving ECU Signals Communication Method
ECM Skid control ECU Throttle position signal CAN communication system
ECM Skid control ECU Engine revolution signal CAN communication system
ECM Skid control ECU Accelerator pedal position signal CAN communication system
ECM Skid control ECU Intake temperature signal CAN communication system
Skid control ECU ECM Yaw rate and deceleration signal CAN communication system
Skid control ECU ECM Steering angle signal CAN communication system
Skid control ECU ECM
Throttle opening angle request
signal
CAN communication system
Skid Control ECU

CAN Communication System
ECM
Skid Control Buzzer
Yaw Rate and
Deceleration Sensor
Steering Angle Sensor
Throttle Position
Sensor
Crankshaft
Position Sensor
C139136E01
BC9
BC
SYSTEM DESCRIPTION
1. SYSTEM DESCRIPTION
HINT:
The skid control ECU forms a single unit with the
hydraulic brake booster.
(a) ABS (Anti-lock Brake System)
The ABS helps prevent the wheels from locking
when the brakes are applied firmly or when braking
on a slippery surface.
(1) Operation description
The skid control ECU detects the wheel lock
condition by receiving vehicle speed signals
from each speed sensor, and sends control
signals to the pump motor and solenoid valves
to prevent the wheels from locking by controlling
the oil pressure of each wheel cylinder.
The ABS warning light comes on when the ABS
system malfunctions.
:
Skid Control
ECU
Each Speed
Sensor
Combination Meter
ABS Warning Light
Brake Fluid Pressure
Pump Motor
Solenoid Valve
Each Wheel
Cylinder
C135270E01
BC10
BC
(b) EBD (Electronic Brake force Distribution)
The EBD control utilizes ABS, realizing proper
brake force distribution between the front and rear
wheels in accordance with the driving conditions
and vehicle load.
In addition, when braking while cornering, it also
controls the brake forces of the right and left wheels,
helping to maintain the vehicle behavior.
The skid control ECU receives the speed signals
from each speed sensor to detect the slip
condition of the wheels and sends the control
signal to the solenoid.
The solenoid valves control the oil pressure of
the rear wheel cylinder and divide the control
power appropriately between the front and rear
wheels and the right and left wheels.
Both of the ABS and the brake warning lights
come on when the EBD system malfunctions.
:
Skid Control ECU
Solenoid Valve Rear Wheel Cylinder
Each Speed Sensor
ABS Warning Light
Brake Warning Light
Combination Meter
C135271E01
BC11
BC
(c) BA (Brake Assist)
The primary purpose of the brake assist system is to
provide an auxiliary brake force to assist drivers
who cannot generate a large enough brake force
during emergency braking, thus helping to maximize
the vehicle's brake performance.
The skid control ECU receives the speed signals
from each speed sensor and the fluid pressure
signal from the master cylinder pressure sensor
to determine whether brake assist is necessary.
If brake assist is deemed necessary, the skid
control ECU sends control signals to the pump
motor and solenoid. The pump and the solenoid
valves then control the pressure applied to each
wheel cylinder.
The ABS warning light comes on when the BA
:
Each Speed Sensor
Skid Control ECU
Each Wheel Cylinder
Pump Motor
Solenoid Valve
Master Cylinder
Pressure Sensor
ABS Warning Light
Combination Meter
C135272E01
BC12
BC
(d) VSC (Vehicle Stability Control)
The VSC system helps prevent the vehicle from
slipping sideways as a result of strong front wheel
skid or strong rear wheel skid during cornering.
: :
Each Speed Sensor
Pump Motor
Solenoid Valve
Skid Control ECU
Each Wheel Cylinder
Skid Control Buzzer
Combination Meter
Yaw Rate and
Deceleration Sensor
Steering Angle
Sensor
ECM
CAN Communication System Brake Fluid Pressure
VSC TRAC
Warning Light
VSC OFF Indicator Light
C135273E01
BC13
BC
The skid control ECU determines the vehicle
condition by receiving signals from the speed
sensors, yaw rate and deceleration sensor and
steering angle sensor. The skid control ECU
controls the engine torque through the ECM via
CAN communication, and brake fluid pressure
through the pump and solenoid valves.
The SLIP indicator light blinks and the skid
control buzzer sounds when the system is
operating. The VSC TRAC warning light and the
VSC OFF indicator light (for 2WD with rear
differential lock or 4WD) come on when the VSC
BC14
BC
(e) TRAC (Traction Control)
The TRAC system helps prevent the drive wheels
from slipping if the driver presses down on the
accelerator pedal excessively when starting off or
accelerating on a slippery surface.
: :
Each Speed Sensor
Skid Control
ECU
Pump Motor
Solenoid Valve
Each Wheel Cylinder
Combination Meter
Yaw Rate and
Deceleration Sensor
Steering Angle
Sensor
ECM
VSC TRAC
Warning Light
C135274E01
BC15
BC
The skid control ECU detects the vehicle's slip
condition by receiving signals from each speed
sensor and the ECM via CAN communication.
The skid control ECU controls engine torque
through the ECM via CAN communication, and
brake fluid pressure through the pump and
solenoid valves.
The SLIP indicator light blinks when the system
is operating. The VSC TRAC warning light and
SLIP indicator light come on when the TRAC
(f) A-TRAC (Active Traction Control)
During rugged off-road driving, this function controls
the engine output and the brake fluid pressure that
is applied to slipping wheels, and distributes the
drive force that would have been lost through the
slippage to the remaining wheels in order to achieve
a LSD (Limited Slip Differential) effect. As a result,
the vehicle's off-road drivability and ability to free
itself from moguls have been increased.
HINT:
The A-TRAC system operates when 4WD mode is
selected (4WD vehicles only).
BC16
BC
: :
Skid Control ECU
Each Speed
Sensor
A-TRAC Switch
ECM
Pump Motor Solenoid Valve
Each Wheel Cylinder
A-TRAC Indicator Light
Combination Meter
C135275E01
BC17
BC
When the A-TRAC switch is pressed and the A-
TRAC system is operative, the A-TRAC indicator
light comes on. When the system is operating,
the SLIP indicator light blinks.
The VSC TRAC warning light and SLIP indicator
light come on when the A-TRAC system
malfunctions.
HINT:
If the A-TRAC system operates constantly for a
long time, the temperature of the actuator in the
hydraulic brake booster may increase
excessively. In such cases, the skid control
buzzer sounds intermittently and the SLIP
indicator light comes on. If this condition
continues, the skid control buzzer sounds for
approximately 1 second and the A-TRAC
system is temporarily deactivated. After a while,
the SLIP indicator light goes off and the A-TRAC
system is reactivated. The vehicle can be driven
normally while the A-TRAC system is
deactivated.
(g) AUTO-LSD (Auto Limited Slip Differential)
The AUTO LSD operates with the AUTO LSD
switch on and the accelerator pedal depressed.
The TRAC system restrains brake pressure and
reduces differential move, thus transmitting the
drive torque to the other drive wheel to ensure
stability under the following conditions:
Wheels run off the road.
Drive wheels run idle when starting on a slope
with one wheel on snow/ice.
HINT:
Depressing the brake pedal cancels control of the
AUTO LSD system.
BC18
BC
: :
Skid Control ECU
Each Speed
Sensor
AUTO LSD Switch
ECM
Pump Motor Solenoid Valve
Each Wheel Cylinder
AUTO LSD
Indicator Light
Combination Meter
C135275E02
BC19
BC
When the AUTO LSD switch is pressed and the
AUTO LSD system is operative, the AUTO LSD
indicator light comes on. When the system is
operating, the SLIP indicator light blinks.
The VSC TRAC warning light and SLIP indicator
light come on when the AUTO LSD system
malfunctions.
HINT:
If the AUTO LSD system operates constantly for
a long time, the temperature of the actuator in
the hydraulic brake booster may increase
excessively. In such cases, the skid control
buzzer sounds intermittently and the SLIP
indicator light comes on. If this condition
continues, the skid control buzzer sounds for
approximately 1 second and the AUTO LSD
system is temporarily deactivated. After a while,
the SLIP indicator light goes off and the AUTO
LSD system is reactivated. The vehicle can be
driven normally while the AUTO LSD system is
deactivated.
2. ABS with EBD, BA, TRAC, AUTO LSD, A-TRAC and
VSC OPERATION
(a) The skid control ECU calculates vehicle stability
tendency based on the signals from the 4 wheel
speed sensors, the yaw rate and deceleration
sensor and the steering angle sensor. In addition, it
evaluates the results of the calculations to
determine whether any control actions (control of
the engine output torque by electronic throttle
control and of the brake fluid pressure by the
hydraulic brake booster) should be implemented.
3. FAIL SAFE FUNCTION
(a) When a failure occurs in the ABS with BA, TRAC,
AUTO LSD, A-TRAC and VSC systems, the ABS
and VSC TRAC warning lights, and VSC OFF and
SLIP indicator lights come on, and the operation of
those systems is prohibited. In addition to this, when
a failure which disables the EBD operation occurs,
the brake warning light comes on and its operation
is prohibited.
(b) If control is prohibited due to a malfunction during
operation, control is disabled gradually to avoid
sudden vehicle instability.
4. INITIAL CHECK
(a) When the vehicle speed first reaches approximately
4 mph (6 km/h) or more after the ignition switch is
turned on, each solenoid valve and the motor of the
hydraulic brake booster are sequentially activated to
perform electrical checks. During the initial check,
the operating sound of the motor can be heard from
the engine compartment, but this does not indicate
a malfunction.
BC20
BC
5. FUNCTION OF COMPONENTS
Components Function
Hydraulic brake booster
Consists of master cylinder solenoid, pump motor and accumulator reservoir,
and adjusts brake fluid pressure applied to each wheel cylinder.
Houses skid control ECU.
Skid control ECU
Processes signals from each sensor to control ABS, BA, TRC, VSC, A-TRAC
and AUTO LSD.
Sends and receives control signals to and from ECM, yaw rate and deceleration
sensor, steering angle sensor, etc. via CAN communication.
Housed in hydraulic brake booster.
Master cylinder pressure sensor
Detects brake fluid pressure in master cylinder.
Accumulator pressure sensor
Detects accumulator pressure in accumulator.
Front speed sensor
Detects wheel speed and sends signal to skid control ECU.
Front speed sensor (semiconductor speed sensor) with integrated bearing and
sensor rotor (magnetic sensor rotor) are installed on front axle hub.
Magnetic sensor rotor is equipped with north and south poles (48 poles each),
which are evenly spaced around its circumference.
Magnetic field changes as magnetic sensor rotor rotates. Semiconductor speed
sensor detects change and outputs it as vehicle speed pulse.
Rear speed sensor
Rear speed sensor (semiconductor speed sensor) and sensor rotor (magnetic
sensor rotor) are installed on rear axle carrier.
Rear speed sensor has same structure and functions as front speed sensor.
ABS warning light
Illuminates to inform driver that skid control ECU has detected ABS system
malfunction and terminated ABS system operation.
BRAKE warning light
Illuminates to inform driver that skid control ECU has detected BRAKE system
malfunction.
VSC TRAC warning light
Illuminates to inform driver that skid control ECU has detected VSC system
malfunction and terminated VSC system operation.
SLIP indicator light Blinks to inform driver that VSC, TRAC, A-TRAC or AUTO LSD is in operation.
A-TRAC indicator light Illuminates to inform driver that A-TRAC is ready to operate.
AUTO LSD indicator light Illuminates to inform driver that AUTO LSD is ready to operate.
Yaw rate and deceleration sensor
Detects vehicle's yaw rate and deceleration and sends signal to skid control ECU via
CAN communication system.
Steering angle sensor
Detects steering wheel's steering angle and amount of movement, then sends signal
to skid control ECU via CAN communication system.
Skid control buzzer
Sounds intermittently to inform driver that VSC activating.
Sounds intermittently to inform driver if temperature of hydraulic brake booster
has increased excessively due to continuous operation of TRAC, A-TRAC and
AUTO LSD.
Sounds continuously to alert driver that hydraulic pressure of accumulator in
hydraulic brake booster has decreased.
ECM
Sends sensor signals (throttle opening angle, engine rpm) to skid control ECU.
Engine controlled based on traction control signal from skid control ECU via CAN
communication system.
A-TRAC switch Allows driver to turn A-TRAC on and off.
AUTO LSD switch Allows driver to turn AUTO LSD on and off.
BC21
BC
HOW TO PROCEED WITH
TROUBLESHOOTING
The intelligent tester can be used in steps 3, 5 and 6.
NEXT
NEXT
NEXT
Result
B
A
(a) Check for the output DTCs relating to the CAN
HINT:
The ECU of this system is connected to the CAN
communication system. Therefore, before starting
troubleshooting, be sure to check that there is no trouble
in the CAN communication system.
Result
B
A
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
3 DTCS AND FREEZE FRAME DATA CHECK AND CLEARANCE
4 PROBLEM SYMPTOM CONFIRMATION
Result Proceed to
Symptom does not occur A
Symptom occurs B
SYMPTOM SIMULATION
5 CHECK CAN COMMUNICATION SYSTEM
Result Proceed to
CAN communication system DTC not output A
CAN communication system DTC output B
CAN COMMUNICATION SYSTEM
BC22
BC
HINT:
See page BC-45.
Result
B
A
HINT:
See page BC-53.
NEXT
HINT:
When 2 or more DTCs are detected, perform circuit
inspections one by one until the problem is identified.
NEXT
NEXT
NEXT
NEXT
6 DTC CHECK
Result Proceed to
DTC output A
DTC not output B
PROBLEM SYMPTOMS TABLE
7 DTC CHART
8 CIRCUIT INSPECTION
9 PROBLEM IDENTIFICATION
10 REPAIR OR REPLACEMENT
11 CONFIRMATION TEST
END
BC23
BC
CHECK FOR INTERMITTENT
PROBLEMS
1. DESCRIPTION
HINT:
A momentary interruption (open circuit) in the connectors
and/or wire harness between the sensors and ECUs can
be detected through the ECU data monitor function of
the intelligent tester.
(a) Turn the ignition switch off and connect the
intelligent tester to the DLC3.
(b) Turn the ignition switch on. Follow the on-screen
directions on the intelligent tester to display the
DATA LIST and select areas which should be
monitored for momentary interruptions.
HINT:
A momentary interruption (open circuit) cannot be
detected for 3 seconds after the ignition switch is
turned on (initial check).
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item
Measurement Item / Range
(Display)
Normal Condition Diagnostic Note
SPD SEN FR
FR speed sensor open detection /
OPN_DET or NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
SPD SEN FL
FL speed sensor open detection /
OPN_DET or NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
SPD SEN RR
RR speed sensor open detection
/ OPN_DET or NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
SPD SEN RL
RL speed sensor open detection /
OPN_DET or NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
EFI COM
EFI communication open
detection / OPN_DET or
NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
YAWRATE SEN
Yaw rate sensor open detection /
OPN_DET or NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
DECELE SEN
Deceleration sensor open
NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
STEERING SEN
Steering angle sensor open
NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
ACC SEN
open detection / OPN_DET or
NORMAL
OPN_DET : Momentary
interruption
NORMAL : Normal
-
BC24
BC
HINT:
If the intelligent tester status remains open,
check the continuity between the ECU and the
sensors, or between ECUs.
The OPEN display on the intelligent tester
remains on for 1 second after the harness signal
changes from momentary interruption (open
circuit) to normal condition.
(c) While observing the screen, gently jiggle the
connector or wire harness between the ECU and
sensors, or between ECUs.
OK:
OPEN-screen display does not change.
1 sec. 1 sec. 1 sec.
Harness Signal:
Intelligent Tester Display:
OK
Momentary
interruption
ERROR
NORMAL
C106657E02
F047126
BC25
BC
CALIBRATION
1. DESCRIPTION
(a) After replacing the VSC relevant components or
performing "Front wheel alignment adjustment",
clearing and reading the sensor calibration data are
necessary.
(b) Follow the chart to perform calibration.
2. CLEAR ZERO POINT CALIBRATION (for Using a
Intelligent Tester)
HINT:
After replacing the yaw rate and deceleration sensor or
adjusting the front wheel alignment, be sure to clear the
zero point calibration data in the skid control ECU and
perform zero point calibration.
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch on.
(c) Operate the intelligent tester to erase the DTCs.
3. PERFORM ZERO POINT CALIBRATION OF YAW
RATE SENSOR AND DECELERATION SENSOR (for
Using a Intelligent Tester)
HINT:
After replacing the skid control ECU and/or yaw rate and
deceleration sensor, or adjusting the front wheel
alignment, be sure to perform yaw rate sensor and
deceleration sensor zero point calibration.
Replacing Parts Necessary Operations
Skid Control ECU Yaw rate sensor and deceleration sensor zero point calibration.
Yaw Rate Sensor
1. Clearing zero point calibration data.
2. Yaw rate sensor and deceleration sensor zero point calibration.
Front Wheel Alignment
1. Clearing zero point calibration data.
2. Yaw rate sensor and deceleration sensor zero point calibration.
Intelligent Tester
DLC3
CAN VIM
H102157E03
F052309
BC26
BC
NOTICE:
While obtaining the zero point, do not vibrate the
vehicle by tilting, moving or shaking it and keep it
stationary. (Do not start the engine.)
Be sure to do this on a level surface (with an
inclination of less than 1 degree).
(a) Procedures for test mode.
(1) Turn the ignition switch off.
(2) Check that the steering wheel is in the straight-
ahead position.
(3) A/T: Check that the shift lever is in the P position
and apply the parking brake.
M/T: Check that the shift lever is in neutral and
apply the parking brake.
NOTICE:
DTC C1210/36 and C1336/39 will be recorded
if the shift lever is not in the P position.
(4) Connect the intelligent tester to the DLC3.
(5) Turn the ignition switch on.
(6)
Switch the ECU to test mode using the intelligent
tester.
Select the following menu items: DIAGNOSTIC /
OBD/MOBD / select vehicle / ABS/VSC / TEST
MODE.
Intelligent Tester
DLC3
CAN VIM
H102157E03
Select
Vehicle
C124760E01
BC27
BC
(7) Keep the vehicle stationary on a level surface for
2 seconds or more.
(8) Check that the VSC TRAC warning light blinks
as shown in the illustration.
NOTICE:
The VSC TRAC warning light (and VSC OFF
indicator light (4WD or 2WD with rear
differential lock)) stay ON when obtaining the
zero point.
HINT:
If the VSC TRAC warning light does not blink,
perform the zero point calibration again.
The zero point calibration is performed only
once after the system enters test mode.
Calibration cannot be performed again until
the stored data is cleared once.
4. CLEAR ZERO POINT CALIBRATION (for Using a SST
Check Wire)
HINT:
After replacing the yaw rate and deceleration sensor or
adjusting the front wheel alignment, be sure to clear the
zero point calibration data in the skid control ECU and
perform zero point calibration.
(a) Turn the ignition switch on.
(b) Using SST, connect and disconnect terminals TS
and CG of the DLC3 4 times or more within 8
seconds.
SST 09843-18040
(c) Check that the warning light blinks in a normal
system indication pattern.
5. PERFORM ZERO POINT CALIBRATION OF YAW
RATE SENSOR AND DECELERATION SENSOR (for
Using a SST Check Wire)
HINT:
After replacing the skid control ECU and/or yaw rate and
deceleration sensor, or adjusting the front wheel
alignment, be sure to perform yaw rate sensor and
deceleration sensor zero point calibration.
NOTICE:
While obtaining the zero point, do not vibrate the
vehicle by tilting, moving or shaking it and keep it
stationary. (Do not start the engine.)
Be sure to do this on a level surface (with an
inclination of less than 1 degree).
(a) Procedures for test mode:
0.13 sec. 0.13 sec.
OFF
ON
BR03904E01
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TS
F100115E01
Normal System Code:
0.25 seconds 0.25 seconds
BR03904E06
BC28
BC
(2) Check that the steering wheel is in the straight-
ahead position.
(3) A/T: Check that the shift lever is in the P position
M/T: Check that the shift lever is in neutral and
apply the parking brake.
NOTICE:
DTC C1210/36 and C1336/39 will be recorded
if the shift lever is not in the P position.
(4) Using SST, connect terminals TS and CG of the
DLC3.
SST 09843-18040
(6) Keep the vehicle stationary on a level surface for
2 seconds or more.
(7) Check that the VSC TRAC warning light blinks
as shown in the illustration.
NOTICE:
The VSC TRAC warning light (and VSC OFF
indicator light (4WD or 2WD with rear
differential lock)) stay ON when obtaining the
zero point.
HINT:
If the VSC TRAC warning light does not blink,
perform the zero point calibration again.
The zero point calibration is performed only
once after the system enters test mode.
Calibration cannot be performed again until
the stored data is cleared once.
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TS
F100115E01
0.13 sec. 0.13 sec.
OFF
ON
BR03904E01
BC29
BC
TEST MODE PROCEDURE
1. TEST MODE PROCEDURE (for Using a Intelligent
Tester)
HINT:
After replacing the yaw rate and deceleration sensor,
be sure to clear the zero point calibration data in the
skid control ECU and perform zero point calibration.
If the ignition switch is turned from the ON to the ACC
or LOCK position during test mode, DTCs related to
the signal check function will be erased.
During test mode, the skid control ECU records all
DTCs related to the signal check function. By
performing the signal check, the codes are erased if
normality is confirmed. The codes left over are the
codes where an abnormality was found.
(a) Turn the ignition switch off.
(b) Check that the steering wheel is in the straight-
ahead position.
(c) A/T: Check that the shift lever is in the P position
M/T: Check that the shift lever is in neutral and apply
the parking brake.
(d) Connect the intelligent tester to the DLC3.
(e) Start the engine.
Intelligent Tester
DLC3
CAN VIM
H102157E03
BC30
BC
(f) Switch the ECU to test mode using the intelligent
tester. Select the following menu items:
DIAGNOSIS / OBD/MOBD /select vehicle / ABS/
VSC / SIGNAL CHECK.
(g) Check that the ABS and VSC TRAC warning lights
blink as shown in the illustration.
HINT:
If the ABS warning light and VSC TRAC warning
light do not blink, inspect the ABS warning light
circuit and VSC TRAC warning light circuit.
(h) Activate the ABS sensors (deceleration sensor,
master cylinder pressure sensor, 4WD detection
switch, L4 detection switch and speed sensor) and
VSC sensor (yaw rate and deceleration sensor) in
test mode (SIGNAL CHECK) using a intelligent
tester.
2. TEST MODE PROCEDURE (for Using a SST Check
Wire)
HINT:
After replacing the yaw rate and deceleration sensor,
be sure to clear the zero point calibration data in the
skid control ECU and perform zero point calibration.
APPLICATION SELECT
1: DIAGNOSTIC
2: CUSTOMIZE
3: ECU REPROGRAM

1: OBD/MOBD
2: ENHANCED OBD II
3: CARB OBD II
4: BRAKE-OUT BOX
5: MVM
OBD/MOBD MENU
1: CODES(ALL)
2: CAN BUS CHECK
3: ENGINE AND ECT
4: ABS/VSC
5: CCS
6: IMMOBILISER
DIAGNOSTIC MENU
ABS/VSC
1: DATA LIST
2: DTC INFO
3: ACTIVE TEST
4: SNAPSHOT
6: RESET MEMORY
7: SIGNAL CHECK
8: TEST MODE
FUNCTION SELECT
FOR NORTH AMERICA
Select
Vehicle
C124736E01
Blinking pattern in TEST MODE:
0.13 seconds
ON
OFF
0.13 seconds
BR03904E43
Trouble area See page
ABS warning light circuit
BC-151
BC-154
VSC TRAC warning light circuit
BC-156
BC-159
BC31
BC
If the ignition switch is turned from the ON to the ACC
or LOCK position during test mode, DTCs relating to
the signal check function will be erased.
During test mode, the skid control ECU records all
DTCs relating to the signal check function. By
performing the signal check, the codes are erased if
normality is confirmed. The remaining codes are
those indicating where an abnormality was found.
(b) Check that the steering wheel is in the straight-
ahead position.
(c) A/T: Check that the shift lever is in the P position
M/T: Check that the shift lever is in neutral and apply
the parking brake.
(d) Using SST, connect terminals TS and CG of the
DLC3.
SST 09843-18040
(e) Start the engine.
(f) Check that the ABS and VSC TRAC warning lights
blink as shown in the illustration.
HINT:
If the ABS warning light and VSC TRAC warning
light do not blink, inspect the TS and CG terminal
circuit, the ABS warning light circuit and VSC TRAC
warning light circuit.
(g) Activate the ABS sensors (deceleration sensor,
master cylinder pressure sensor, 4WD detection
switch, L4 detection switch and speed sensor) and
VSC sensor (yaw rate and deceleration sensor) in
test mode (SIGNAL CHECK) using a check wire.
3. DECELERATION SENSOR SIGNAL CHECK
(a) Keep the vehicle stationary on a level surface for 1
second or more.
HINT:
The ABS warning light continues blinking at this
time.
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TS
F100115E01
Blinking pattern in TEST MODE:
0.13 seconds
ON
OFF
0.13 seconds
BR03904E43
Trouble area See page
BC-151
BC-154
BC-156
BC-159
TS and CG terminal circuit BC-193
BC32
BC
4. MASTER CYLINDER PRESSURE SENSOR CHECK
(a) Keep the vehicle stationary and release the brake
pedal for 1 second or more, and quickly depress the
brake pedal with a force of 98 N (10 kgf) or more for
1 second or more.
(b) Check that the ABS warning light comes on for 3
seconds.
HINT:
While the ABS warning light stays on, continue to
depress the brake pedal with a force of 98 N (10
kgf) or more.
The ABS warning light comes on for 3 seconds
every time the above brake pedal operation is
performed.
5. 4WD DETECTION SWITCH SIGNAL CHECK (for 4WD
models)
(a) M/T:
(1) Move the transfer high and low shift lever to HL
or HH to lock the center differential.
(2) Move the transfer high and low shift lever to H to
unlock the center differential.
(b) A/T:
(1) Move the transfer high and low shift lever to H4
or L4 to put the vehicle in 4WD mode.
(2) Move the transfer high and low shift lever to H2
to put the vehicle in 2WD mode.
6. L4 DETECTION SWITCH SIGNAL CHECK (for 4WD
models of A/T)
(a) Move the transfer high and low shift lever to the L4
position.
(b) Move the transfer high and low shift lever to H2 or
H4.
HINT:
Move the vehicle either a little forward or a little
backward to engage the L4 position.
7. SPEED SENSOR CHECK
(a) Drive the vehicle straight rearward at a speed of 1.9
mph (3 km/h) or more for 1 second or more.
NOTICE:
At this time, if the vehicle speed exceeds 28
mph (45 km/h), a signal check code will be
stored again. Decelerate or stop the vehicle
before the speed reaches 28 mph (45 km/h).
(b) Drive the vehicle straight forward at a speed of 56
mph (90 km/h) or more.
(c) Check that the ABS warning light goes off.
NOTICE:
Before performing the speed sensor signal
check, complete the deceleration sensor,
master cylinder pressure sensor, 4WD
detection switch and L4 detection switch
signal checks.
BC33
BC
The speed sensor signal check may not be
completed if the speed sensor signal check is
started while turning the steering wheel or
spinning the wheels.
After the ABS warning light goes off, if the
vehicle speed exceeds 28 mph (45 km/h), a
signal check code will be stored again.
Decelerate or stop the vehicle before the
speed reaches 28 mph (45 km/h).
If the signal check has not been completed,
the ABS warning light blinks while driving
and the ABS system does not operate.
(d) Stop the vehicle.
HINT:
When the signal check has been completed, the
ABS warning light goes off while driving and blinks
in test mode while stationary.
8. READ DTC OF ABS SENSOR (for Using a Intelligent
Tester)
(a) Read the DTC(s) by following the tester screen.
HINT:
Refer to the intelligent tester operator's manual for
further details.
Blinking pattern in speed sensor check:
Vehicle Speed: mph (km/h)
50 (80)
28 (45)
0 (0)
Low Speed Check Middle Speed
Check
ABS Warning Light
ON
OFF
Time
C138451E01
BC34
BC
9. READ DTC OF ABS SENSOR (for Using a SST Check
Wire)
(a) Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
(c) Read the number of blinks of the ABS warning light.
If every sensor is normal, the normal code is
displayed (A cycle of 0.25 seconds ON and 0.25
seconds OFF is repeated).
If 2 or more malfunctions are detected at the
same time, the lowest numbered DTC is
displayed first.
(d) After the check, disconnect the SST from terminals
TC and CG of the DLC3.
(e) Turn the ignition switch off.
10. AUTO LSD SWITCH CHECK (for vehicles with AUTO
LSD)
(a) Press the AUTO LSD switch.
(b) Check that the AUTO LSD indicator light comes on.
(c) Press the AUTO LSD switch again to turn the AUTO
LSD indicator off.
11. A-TRAC SWITCH CHECK (for vehicles with A-TRAC)
(a) Press the A-TRAC switch.
(b) Check that the A-TRAC indicator light comes on.
(c) Press the A-TRAC switch again to turn the A-TRAC
indicator off.
12. YAW RATE SENSOR CHECK
(a) Keep the vehicle stationary on a level surface for 1
second or more.
Normal System Code:
BR03904E06
Example: Indication of DTCs 72 and 76
2.5 seconds
4 seconds
Repeat
0.5 seconds
ON
OFF
DTC 72 DTC 76
C124737E01
BC35
BC
(b) Shift the shift lever to the D position (A/T) and drive
the vehicle at a speed of approximately 3 mph (5
km/h), turn the steering wheel either to the left or
right 90or more, and turn the vehicle through 180
degrees.
(c) A/T: Stop the vehicle, check that the shift lever is in
the P position, and then apply the parking brake.
M/T: Stop the vehicle, check that the shift lever is in
neutral, and then apply the parking brake.
(d) Check that the skid control (VSC warning) buzzer
sounds for 3 seconds.
HINT:
If the skid control (VSC warning) buzzer sounds,
the signal check has been completed normally.
If the skid control (VSC warning) buzzer does not
sound, check the skid control buzzer circuit (See
page BC-187), then perform the signal check
again.
If the skid control (VSC warning) buzzer still
doesn't sound, there is a malfunction in the yaw
rate sensor, so check the DTC.
Drive the vehicle in a 180 semi circle. At the end
of the turn, the direction of the vehicle should be
within 180+-5 of its start position.
The vehicle turn should be completed within 20
seconds.
Do not spin the wheels.
13. READ DTC OF VSC SENSOR (for Using a Intelligent
Tester)
(a) Read the DTC(s) by following the tester screen.
Refer to the intelligent tester operator's manual
for further details.
14. READ DTC OF VSC SENSOR (for Using a SST Check
Wire)
(a) Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
(c) Read the number of blinks of the VSC TRAC
warning light.
If every sensor is normal, the normal code is
displayed (A cycle of 0.25 seconds ON and 0.25
seconds OFF is repeated).
Start Position
End Position
Within +- 5 deg.
F002135E17
Normal System Code:
BR03904E06
BC36
BC
displayed first.
(d) After the check, disconnect the SST from terminals
TC and CG of the DLC3.
(e) Turn the ignition switch off.
15. DTC OF SIGNAL CHECK FUNCTION
ABS sensor
Example: Indication of DTCs 72 and 76
2.5 seconds
4 seconds
Repeat
0.5 seconds
ON
OFF
DTC 72 DTC 76
C124737E01
DTC No. Diagnosis Trouble Areas
C1271/71 Low output voltage of right front speed sensor
Front speed sensor RH
Front speed sensor RH circuit
Sensor installation
Skid control sensor wire
Master cylinder solenoid (skid control ECU)
C1272/72 Low output voltage of left front speed sensor
Front speed sensor LH
Front speed sensor LH circuit
Sensor installation
C1273/73 Low output voltage of right rear speed sensor
Rear speed sensor RH
Rear speed sensor RH circuit
Sensor installation
C1274/74 Low output voltage of left rear speed sensor
Rear speed sensor LH
Rear speed sensor LH circuit
Sensor installation
C1275/75
Abnormal change in output voltage of right front speed
sensor
Front speed sensor RH
Front speed sensor RH circuit
C1276/76
Abnormal change in output voltage of left front speed
sensor
Front speed sensor LH
Front speed sensor LH circuit
C1277/77
Abnormal change in output voltage of right rear speed
sensor
Rear speed sensor RH
Rear speed sensor RH circuit
C1278/78
Abnormal change in output voltage of left rear speed
sensor
Rear speed sensor LH
Rear speed sensor LH circuit
C1279/79 Deceleration sensor faulty
Yaw rate and deceleration sensor circuit
BC37
BC
HINT:
*
1: 4WD only
*
2: 4WD + A/T
VSC sensor
HINT:
The codes in this table are output only in test mode
(signal check).
C1281/81 Master cylinder pressure sensor output malfunction
Hydraulic brake booster (master cylinder pressure
sensor)
Stop light switch circuit
C1282/82
(
*
1)
Center differential lock position switch malfunction
Transfer indicator switch (4WD position) (A/T)
Transfer indicator switch (4WD position) circuit (A/
T)
Transfer indicator switch (center differential lock
position) (M/T)
position) circuit (M/T)
C1283/83
(
*
2)
L4 detection switch malfunction
Transfer indicator switch (L4 position)
Transfer indicator switch (L4 position) circuit
C0371/71 Yaw rate sensor output signal malfunction Yaw rate and deceleration sensor
BC38
BC
PROBLEM SYMPTOMS TABLE
If a normal code is displayed during the DTC check but the
problem still occurs, check the circuits for each problem
symptom in the order given in the table below and proceed to
the relevant troubleshooting page.
NOTICE:
When replacing the skid control ECU, sensor or etc., turn
the ignition switch off.
VEHICLE STABILITY CONTROL SYSTEM
Symptom Suspected area See page
ABS, BA and/or EBD does not operate
1. Check for DTCs again and make sure that normal system
code displayed.
BC-45
2. IG1 power source circuit BC-97
4. Front speed sensor circuit BC-59
5. Rear speed sensor circuit BC-67
6. Check hydraulic brake booster using intelligent tester
(Check hydraulic brake booster operation using active test
function) If abnormal, check hydraulic circuit for leakage.
BR-19
7. If symptoms still occur even after above circuits in
suspected areas inspected and proved to be normal, replace
master cylinder solenoid.
BR-33
ABS, BA and/or EBD does not operate efficiently
code displayed.
BC-45
4. Stop light switch circuit BC-111
BR-19
BR-33
VSC and/or TRC does not operate
code displayed.
BC-45
6. Yaw rate and deceleration sensor circuit BC-79
7. Steering angle sensor circuit BC-93
BR-19
BR-33
AUTO LSD does not operate
code displayed.
BC-45
BR-19
BR-33
BC39
BC
A-TRAC does not operate
code displayed.
BC-45
BR-19
BR-33
DTC check cannot be performed
code displayed.
BC-45
2. TC and CG terminal circuit BC-190
BR-33
Sensor signal check cannot be performed
1. TS and CG terminal circuit BC-193
BR-33
ABS warning light remains on
1. ABS warning light circuit BC-151
2. Master cylinder solenoid BR-33
ABS warning light does not come on
1. ABS warning light circuit BC-154
VSC TRAC warning light remains on
1. VSC TRAC warning light circuit BC-156
VSC TRAC warning light does not come on
1. VSC TRAC warning light circuit BC-159
BRAKE warning light remains on
1. BRAKE warning light circuit BC-161
BRAKE warning light does not come on
1. BRAKE warning light circuit BC-166
VSC OFF indicator light remains on
1. VSC OFF indicator light circuit BC-168
VSC OFF indicator light does not come on
1. VSC OFF indicator light circuit BC-171
SLIP indicator light remains on
1. SLIP indicator light circuit BC-173
SLIP indicator light does not come on
1. SLIP indicator light circuit BC-175
AUTO LSD indicator light remains on
1. AUTO LSD indicator light circuit BC-177
AUTO LSD indicator light does not come on
1. AUTO LSD indicator light circuit BC-180
A-TRAC indicator light remains on
1. A-TRAC indicator light circuit BC-182
A-TRAC indicator light does not come on
1. A-TRAC indicator light circuit BC-185
Skid control buzzer abnormal
1. Skid control buzzer circuit BC-187
Symptom Suspected area See page
BC40
BC
TERMINALS OF ECU
1. TERMINALS OF ECU
Symbols (Terminal No.) Terminal Description
GND1 (1) Skid control ECU ground
+BM1 (2) Power supply for motor
FR+ (3) Front right wheel speed sensor power supply output
FL- (4) Front left wheel speed signal input
RR+ (5) Rear right wheel speed sensor power supply output
RL- (6) Rear left wheel speed signal input
STP (7) Stop light switch input
NEO (10) (
*
1)
2WD/4WD change over switch input
CANH (11) CAN communication line H
SP1 (12) (
*
2)
Speed signal output for combination meter
D/G (13) Diagnosis tester communication line
P (14) (
*
2)
Shift position indicator P signal input
INFR (15) (
*
3)
AUTO LSD indicator light output
STPO (16) Stop light operated relay output
FR- (17) Front right wheel speed sensor input
FL+ (18) Front left wheel speed sensor power supply output
RR- (19) Rear right wheel speed sensor input
RL+ (20) Rear left wheel speed sensor power supply output
EXI4 (21) (
*
4)
Transfer indicator switch (L4) input
TS (24) Sensor test terminal (Sensor check switch) input
CANL (25) CAN communication line L
EXI3 (26) (
*
5)
Rear differential lock position switch input
EXI (27) (
*
4)
Transfer indicator switch (A/T: 4WD position, M/T: center differential
lock position) input
PKB (28) Parking brake switch input
WA (29) ABS warning light input
BZ (30) Skid control buzzer output
+BS (31) Power supply for solenoid
HDCW (33) (
*
6)
A-TRAC indicator light output
IND (34) SLIP indicator light output
WT (35) (
*
7)
VSC OFF indicator light output
VSCW (36) VSC TRAC warning light output
LBL (41) Brake fluid level warning switch input
WFSE (42) Write flash enable input
CSW (43) (
*
3)
AUTO LSD switch input
Skid control ECU:
A4
C110610E06
BC41
BC
(
*
1): 4WD, A/T
(
*
2): A/T
(
*
3): with AUTO LSD
(
*
4): 4WD
(
*
5): with rear differential lock
(
*
6): with A-TRAC
(
*
7): 4WD or 2WD with rear differential lock
2. TERMINAL INSPECTION
Disconnect the connector and measure the voltage or
resistance on the wire harness side.
HINT:
Voltage cannot be measured with the connector
connected to the skid control ECU as the connector is
water resistant.
HDCS (44) (
*
6)
A-TRAC switch input
STP2 (45) Stop light switch input
IG1 (46) IG1 power supply
IG2 (1) IG2 power supply
+BM2 (2) Power supply for motor
BRL (3) BRAKE warning light output
A5
Skid Control ECU:
C124763E03
Skid Control ECU (Wire Harness Side)
Connector Front View:
A4 A5
C124764E03
BC42
BC
Standard
Symbols (Terminal No.)
Wiring
Color
Terminal Description Condition
Specified
Condition
+BM1 (A4-2) - GND1, GND2 (A4-
1, 32)
L-Y - W-B
Power supply for motor
from battery
Always 11 to 14 V
IG1 (A4-46) - GND1, GND2 (A4-
1, 32)
B-R - W-B IG1 power supply IG switch OFF Below 1 V
IG1 (A4-46) - GND1, GND2 (A4-
1, 32)
B-R - W-B IG1 power supply IG switch ON 11 to 14 V
STP (A4-7) - GND1, GND2 (A4-1,
32)
G-B - W-B Stop light switch input
Stop light switch OFF (Brake pedal
released)
Below 1.5 V
STP (A4-7) - GND1, GND2 (A4-1,
32)
G-B - W-B Stop light switch input
Stop light switch ON (Brake pedal
released)
8 to 14 V
P (A4-14) - GND1, GND2 (A4-1,
32) (*1)
Y-B - W-B
Shift position indicator P
signal input
IG switch ON, shift P position 8 to 14 V
P (A4-14) - GND1, GND2 (A4-1,
32) (
*
1)
Y-B - W-B
Shift position indicator P
signal input
IG switch ON, any shift position except P Below 1 V
EXI4 (A4-21) - GND1, GND2 (A4-
1, 32) (
*
1) (
*
2)
W-L - W-B
Transfer indicator switch
(L4) input
IG switch ON, transfer position L4 Below 1.5 V
EXI4 (A4-21) - GND1, GND2 (A4-
1, 32) (
*
1) (
*
2)
W-L - W-B
(L4) input
IG switch ON, transfer condition except
L4
8 to 14 V
EXI3 (A4-26) - GND1, GND2 (A4-
1, 32) (
*
3)
L-Y - W-B
Rear differential lock
detection switch input
IG switch ON, rear differential lock switch
ON
Below 1.5 V
EXI3 (A4-26) - GND1, GND2 (A4-
1, 32) (
*
3)
L-Y - W-B
Rear differential lock
detection switch input
IG switch ON, rear differential lock switch
OFF
8 to 14 V
EXI (A4-27) - GND1, GND2 (A4-
1, 32) (
*
2)
GR - W-B
(A/T: 4WD position, M/T:
center differential lock
position) input
A/T: IG switch ON, transfer condition H4
or L4
M/T: IG switch ON, transfer condition HH
or HL
8 to 14 V
EXI (A4-27) - GND1, GND2 (A4-
1, 32) (
*
2)
GR - W-B
(A/T: 4WD position, M/T:
center differential lock
position) input
A/T: IG switch ON, transfer condition H2
M/T: IG switch ON, transfer condition H
Below 1.5 V
PKB (A4-28) - GND1, GND2 (A4-
1, 32)
W-R - W-B Parking brake switch input IG switch ON, parking brake switch ON Below 1.5 V
PKB (A4-28) - GND1 , GND2 (A4-
1, 32)
W-R - W-B Parking brake switch input IG switch ON, parking brake switch OFF 11 to 14 V
+BS (A4-31) - GND1, GND2 (A4-
1, 32)
Y - W-B
Power supply for solenoid
from battery
Always 11 to 14 V
LBL (A4-41) - GND1, GND2 (A4-
1, 32)
V-R - W-B
Brake fluid level warning
switch input
Brake fluid level min. -5mm Below 1
LBL (A4-41) - GND1, GND2 (A4-
1, 32)
V-R - W-B
Brake fluid level warning
switch input
Brake fluid level max. 1.9 k to 2.1 k
CSW (A4-43) - GND1, GND2
(A4-1, 32) (
*
4)
R-L - W-B AUTO LSD switch input
Ignition switch ON, AUTO LSD switch
ON
Below 1.5 V
CSW (A4-43) - GND1, GND2
(A4-1, 32) (
*
4)
R-L - W-B AUTO LSD switch input
Ignition switch ON, AUTO LSD switch
OFF
8 to 14 V
HDCS (A4-44) - GND1, GND2
(A4-1, 32) (
*
5)
P-G - W-B A-TRAC switch input Ignition switch ON, A-TRAC switch ON Below 1.5 V
HDCS (A4-44) - GND1, GND2
(A4-1, 32) (
*
5)
P-G - W-B A-TRAC switch input Ignition switch ON, A-TRAC switch OFF 8 to 14 V
STP2 (A4-45) - GND1, GND2
(A4-1, 32)
G-Y - W-B Stop light switch input
Stop light switch OFF (Brake pedal
released)
Below 1.5 V
STP2 (A4-45) - GND1, GND2
(A4-1, 32)
G-Y - W-B Stop light switch input
Stop light switch ON (Brake pedal
released)
8 to 14 V
IG2 (A5-1) - GND3 (A5-4) B-O - W-B IG2 power supply IG switch OFF Below 1 V
IG2 (A5-1) - GND3 (A5-4) B-O - W-B IG2 power supply IG switch ON 11 to 14 V
BC43
BC
HINT:
(
*
1): A/T
(
*
2): 4WD
(
*
3): with rear differential lock
(
*
4): with AUTO LSD
(
*
5): with A-TRAC
DIAGNOSIS SYSTEM
1. CHECK DLC3
(a) The ECU uses ISO 15765-4 for communication.
The terminal arrangement of the DLC3 complies
with ISO 15031-3 and matches the ISO 15765-4
format.
NOTICE:
*
: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do not
operate the ignition switch, any other switches
or the doors.
If the result is not as specified, the DLC3 may have
a malfunction. Repair or replace the harness and
connector.
HINT:
Connect the cable of the intelligent tester to the
CAN VIM, connect the CAN VIM to the DLC3, turn
the ignition switch ON and attempt to use the tester.
If the display indicates that a communication error
has occurred, there is a problem either with the
vehicle or with the tester.
If communication is normal when the tester is
connected to another vehicle, inspect the DLC3
of the original vehicle.
+BM2 (A5-2) - GND3 (A5-4) L-Y - W-B
Power supply for motor
from battery
Always 11 to 14 V
Symbols (Terminal No.)
Wiring
Color
Terminal Description Condition
Specified
Condition
CG SG
BAT
SIL CANH
CANL
H100769E16
Symbols (Terminal No.) Terminal Description Condition Specified Condition
SIL (7) - SG (5) Bus "+" line During transmission Pulse generation
CG (4) - Body ground Chassis ground Always Below 1
SG (5) - Body ground Signal ground Always Below 1
BAT (16) - Body ground Battery positive Always 10 to 14 V
CANH (6) - CANL (14) HIGH-level CAN bus line
Ignition switch OFF
*
54 to 69
CANH (6) - CG (4) HIGH-level CAN bus line
Ignition switch OFF
*
200 or more
CANL (14) - CG (4) LOW-level CAN bus line
Ignition switch OFF
*
200 or more
CANH (6) - BAT (16) HIGH-level CAN bus line
Ignition switch OFF
*
6 k or more
CANL (14) - BAT (16) LOW-level CAN bus line
Ignition switch OFF
*
6 k or more
Intelligent Tester
DLC3
CAN VIM
H102157E03
BC44
BC
If communication is still not possible when the
tester is connected to another vehicle, the
problem is probably in the tester itself. Consult
the Service Department listed in the tester's
instruction manual.
2. DIAGNOSIS
(a) If the skid control ECU detects a malfunction, the
ABS warning light, VSC TRAC warning light,
BRAKE warning light, VSC OFF indicator light and/
or SLIP indicator light come on in accordance with
the trouble area to warn the driver.
The table below indicates which lights come on
when there is a malfunction in a particular function.
{: Light ON, -: Light OFF
HINT:
The DTCs are simultaneously stored in the memory. The
DTCs can be read by connecting the intelligent tester.
Indicator /
Trouble Area
ABS EBD BA VSC TRAC AUTO LSD A-TRAC
ABS Warning
Light
{ { { - - - -
VSC TRAC
Warning Light
- - - { { { {
Brake Warning
Light
- { - - - - -
VSC OFF
Indicator Light
- - - { - - -
Slip Indicator
Light
- - - - { { {
VSC
OFF
VSC
TRAC
ABS Warning Light: VSC TRAC Warning Light:
BRAKE Warning Light: VSC OFF Indicator Light: SLIP Indicator Light:
USA: Canada:
C138641E01
BC45
BC
This system has a sensor signal check function (See page
BC-28). The DTCs can be read by connecting SST
(09843-18040) between terminals TS and CG of the DLC3
and observing the blinking of the ABS warning light and
VSC TRAC warning light, or by connecting the intelligent
tester.
3. WARNING LIGHT AND INDICATOR LIGHT CHECK
(a) Release the parking brake.
NOTICE:
When releasing the parking brake, set chocks to
hold the vehicle for safety.
HINT:
When the parking brake is applied or the level of the
brake fluid is low, the BRAKE warning light comes
on.
(b) Check that the ABS warning light, VSC TRAC
warning light, BRAKE warning light, VSC OFF
indicator light, SLIP indicator light and AUTO LSD
indicator light come on when the ignition switch is
turned on, and go off in about 3 seconds.
HINT:
If the lights do not illuminate, confirm whether the
bulbs have burned out, and also check the wire
harness between the skid control ECU and the
combination meter.
If the light remains on, troubleshoot the effected
light circuit by proceeding to the page indicated
below.
VSC
OFF
VSC
TRAC
AUTO
LSD
ABS Warning Light:
VSC TRAC
Warning Light:
BRAKE
Warning Light:
VSC OFF
Indicator Light:
AUTO LSD
Indicator Light:
SLIP Indicator Light:
USA: Canada:
C138644E01
Trouble Area See Page
ABS warning light circuit BC-151
VSC TRAC warning light circuit BC-156
BRAKE warning light circuit BC-161
BC46
BC
DTC CHECK / CLEAR
1. DTC CHECK (for Using a Intelligent Tester)
(a) Check DTCs.
(3) Turn the tester on.
(4) Read the DTCs using the intelligent tester.
Select the following menu items: DIAGNOSIS /
OBD/MOBD/ select vehicle / ABS/VSC / DTC
INFO / TROUBLE CODES.
2. DTC CLEAR (for Using a Intelligent Tester)
(a) Clear DTCs.
(3) Turn the tester on.
(4) Clear the DTCs using the intelligent tester.
Select the following menu items: DIAGNOSIS /
OBD/MOBD/ select vehicle / ABS/VSC / DTC
INFO / CLEAR CODES.
3. DTC CHECK (for Using a SST Check Wire)
(a) Check DTCs.
(1) Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
(3) Read 2-digit DTCs by observing the blinking of
the ABS warning light and the VSC TRAC
warning light on the combination meter.
HINT:
If no code appears, inspect the ABS warning
light circuit, VSC TRAC warning light circuit or
TC and CG terminal circuit.
VSC OFF indicator light circuit BC-168
SLIP indicator light circuit BC-173
AUTO LSD indicator light BC-177
Trouble Area See Page
Intelligent Tester
DLC3
CAN VIM
H102157E03
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TC
F100115E02
Trouble Area See page
BC-151
BC-154
BC-156
BC-159
TC and CG terminal circuit BC-190
BC47
BC
As an example, the blinking patterns of the
normal system indication and DTCs 11 and
21 are shown below.
DTCs are explained in DTC chart (See page
BC-53).
(4) After completing the check, disconnect SST
from terminals TC and CG of the DLC3, and turn
the ignition switch off.
displayed first.
4. DTC CLEAR (for Using a Intelligent Tester)
(a) Clear DTCs.
(1) Using SST, connect terminals TC and CG of the
DLC3.
SST 09843-18040
(3) Clear the DTCs stored in the ECU by depressing
the brake pedal 8 times or more within 5
seconds.
(4) Check that the ABS warning light and VSC
TRAC warning light blink in normal code pattern.
(5) Remove SST from the terminals of the DLC3.
HINT:
Clearing the DTCs cannot be performed by
removing the battery cable.
5. END OF DTC CHECK/CLEAR
(a) Turn the ignition switch to the ON position
(b) Check that the ABS warning light and VSC TRAC
warning light go off within approximately 3 seconds.
(c) Turn the ignition switch to OFF.
Normal System Indication: Indication of DTCs 11 and 21:
2 sec. 0.25 sec.
0.25 sec.
ON
OFF
4 sec.
1.5 sec.
2.5 sec.
0.5 sec.
0.5 sec.
4 sec.
DTC 11 DTC 21
ON
OFF
Repeat
F100113E01
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TC
F100115E02
C139131
BC48
BC
FREEZE FRAME DATA
HINT:
Whenever a DTC is detected or the ABS operates,
the skid control ECU stores the current vehicle
(sensor) state as freeze frame data.
The skid control ECU stores the number of times
(maximum: 31) the ignition switch has been turned
from OFF to the ON position since the last time the
ABS was activated. However, if the vehicle was
stopped or at low speed (4.3 mph (7 km/h) or less), or
if a DTC is detected, the skid control ECU will not
count the number after that.
Freeze frame data at the time the ABS operates: The
skid control ECU stores and updates the data
whenever the ABS system operates. When the ECU
stores data at the time a DTC is detected, the data
stored when the ABS operated is erased.
Freeze frame data at the time a DTC is detected:
When the skid control ECU stores data at the time a
DTC is detected, no updates will be performed until
the data is cleared.
(c) Turn the tester on.
(d) From the display on the tester, select the FREEZE
FRAME DATA.
Intelligent Tester
DLC3
CAN VIM
H102157E03
Intelligent Tester Measurement Item Reference Value
TROUBLE CODE Freeze DTC min.: 0, max.: 65535
STOP LIGHT SW Stop light switch signal Stop light switch ON: ON, OFF: OFF
VSC/TRC OFF SW VSC OFF switch signal VSC OFF SW ON: ON, OFF: OFF
SHIFT POSITION Shift lever position
FAIL
P,N
R
D
4
3
2
L
SYSTEM System status
ABS activated: ABS
VSC/TRAC activated: VSC/TRAC
BA activated: BA
Fail safe mode activated: FAIL SF
No system activated: NO SYS
# IG ON
Number of operations turning ignition switch
to ON since freeze frame data stored
0 to 31
VEHICLE SPD Wheel speed sensor reading Speed indicated on speedometer
STEERING ANG Steering sensor reading
Left turn: Increase
Right turn: Drop (Deceleration)
YAW RATE Yaw rate angle sensor reading -128 to 127
BC49
BC
MAS CYL PRESS Master cylinder pressure sensor reading
Brake pedal released: 0.3 to 0.9 V
Brake pedal depressed: 0.8 to 4.5 V
MAS PRESS GRADE Master cylinder pressure sensor change -30 to 225 MPa/s
G (RIGHT & LEFT) Right and left G (Yaw Rate) -1.869 to 1.869
G (BACK & FORTH) Back and forth G (Deceleration) -1.869 to 1.869
WHEEL DIR FR Front right wheel direction
Wheel direction BACK: BACK
Wheel direction FORWARD: FORWARD
WHEEL DIR FL Front left wheel direction
WHEEL DIR RR Rear right wheel direction
WHEEL DIR RL Rear left wheel direction
BUZZER VSC buzzer signal VSC buzzer ON: ON, OFF: OFF
RESERVOIR SW Reservoir level warning switch signal
Reservoir level warning Switch ON: ON, OFF:
OFF
PKB SW Parking brake switch signal Parking brake Switch ON: ON, OFF: OFF
Intelligent Tester Measurement Item Reference Value
BC50
BC
FAIL-SAFE CHART
1. FAIL SAFE OPERATION
If there is a problem with any sensor signals or
hydraulic brake booster systems, the skid control
ECU prohibits the power supply to the actuator in the
hydraulic brake booster and informs the ECM of VSC
system failure.
The hydraulic brake booster turns off solenoids and
the ECM shuts off the VSC control (traction control
signal) from the skid control ECU accordingly, the
result of which is as if the ABS, TRAC and VSC
systems were not installed.
ABS control is prohibited, but EBD control continues
as far as possible. If EBD control is impossible, the
BRAKE warning light comes on to warn the driver
(See page BC-41).
If system components have any malfunctions before
starting control, the operation stops immediately.
If system components have any malfunctions during
control, the control stops gradually so as not to trigger
a sudden change in vehicle conditions.
If it is impossible to control the systems, the warning
light comes on to inform the driver of the malfunction
in the systems (See page BC-41).
HINT:
If the ABS, BA, TRAC, A-TRAC, VSC and AUTO LSD
systems malfunction, the brake system will operate
normally without ABS, BA, TRAC, VSC and AUTO
LSD controls.
If the hydraulic brake booster malfunctions, a gradual
loss of brake performance is expected, and ABS, BA,
TRAC, A-TRAC, VSC and AUTO LSD system
controls are prohibited.
(a) ABS, EBD and BA systems:
HINT:
If the ABS, BA or EBD system malfunctions, the
following controls are prohibited as shown in the
table below.
(b) TRAC, A-TRAC, VSC and AUTO LSD systems:
HINT:
If TRAC, A-TRAC, VSC and/or AUTO LSD
malfunction, the following controls are prohibited as
shown in the table below.
Malfunction Area Fail-Safe Operation
ABS system ABS, BA, TRAC, A-TRAC, VSC and AUTO LSD control prohibited
BA system ABS, BA, TRAC, A-TRAC, VSC and AUTO LSD control prohibited
EBD system ABS, BA, EBD, TRAC, A-TRAC, VSC and EBD control prohibited
Engine control system
(TRAC, A-TRAC and VSC systems)
Before control: Disables control
During control: Uses only brakes to effect control
Brake control system
(VSC system)
Before control Disables control
During control Uses only brakes to effect control
BC51
BC
2. SYSTEM TEMPERATURE PROTECTION OPERATION
If the TRAC, A-TRAC or AUTO LSD system has been
used constantly for a long time, the temperature of the
hydraulic brake booster may increase excessively. If the
temperature increases excessively, the skid control
buzzer sounds intermittently. If the temperature
increases further, the skid control buzzer sounds for 3
seconds repeatedly and the indicator light either comes
on or blinks.
Brake control system
(TRAC, A-TRAC and AUTO LSD systems)
Before control: Disables control
During control: Disables control (by gradually ending control)
System Indicator Condition
TRAC or A-TRAC system SLIP indicator light comes on
AUTO LSD system
SLIP indicator light comes on
AUTO LSD indicator light stays on
BC52
BC
DATA LIST / ACTIVE TEST
1. DATA LIST
HINT:
By referring to the DATA LIST displayed on the intelligent
tester, the value and status of parts such as switches,
sensors and actuator can be read without removing any
parts. Reading the DATA LIST as the first step of
troubleshooting is one method of shortening diagnostic
time.
(c) Turn the intelligent tester on.
(d) Select the following menu items: Chassis / ABS/
VSC/TRC / Data List.
Item
Measurement Item : Range
(Display)
HB MOT RELAY HB motor relay : ON or OFF
ON : Motor relay ON
OFF : Motor relay OFF
-
SOL RELAY Solenoid relay : ON or OFF
ON : Solenoid relay ON
OFF : Solenoid relay OFF
-
IDLE SW Main idle switch : ON or OFF
ON : Accelerator pedal released
OFF : Accelerator pedal
depressed
-
STOP LIGHT SW Stop light switch : ON or OFF
ON : Brake pedal depressed
OFF : Brake pedal released
-
PKB SW Parking brake switch : ON or OFF
ON : Parking brake applied
OFF : Parking brake released
-
RESERVOIR SW
Reservoir level warning switch :
ON or OFF
ON : Switch ON
OFF : Switch OFF
-
ABS OPERT FR
ABS operation (FR) : BEFORE or
OPERATE
BEFORE : No ABS operation
(FR)
OPERATE : During ABS
operation (FR)
-
ABS OPERT FL
ABS operation (FL) : BEFORE or
OPERATE
BEFORE : No ABS operation (FL)
operation (FL))
-
ABS OPERT RR
ABS operation (RR) : BEFORE or
OPERATE
(RR)
operation (RR)
-
ABS OPERT RL
ABS operation (RL) : BEFORE or
OPERATE
(RL)
operation (RL)
-
WHEEL SPD FR
Wheel speed sensor (FR) reading
: min.: 0 MPH (0 km:h), max.: 202
MPH (326 km:h)
Actual wheel speed
Similar speed to that indicated on
speedometer
WHEEL SPD FL
Wheel speed sensor (FL) reading
: min.: 0 MPH (0 km:h), max.: 202
MPH (326 km:h)
Actual wheel speed
speedometer
WHEEL SPD RR
Wheel speed sensor (RR) reading
: min.: 0 MPH (0 km:h), max.: 202
MPH (326 km:h)
Actual wheel speed
speedometer
WHEEL SPD RL
Wheel speed sensor (RL) reading
: min.: 0 MPH (0 km:h), max.: 202
MPH (326 km:h)
Actual wheel speed
speedometer
DECELERAT SEN
Deceleration sensor 1 reading :
min.: -1.869 G, max.: 1.869 G
Approximately 0 +- 0.13G in still
condition
Reading changes when vehicle
bounced
BC53
BC
DECELERAT SEN2
Deceleration sensor 2 reading :
min.: -1.869 G, max.: 1.869 G
Approximately 0 +- 0.13G in still
condition
Reading changes when vehicle
bounced
IG VOLTAGE
ECU power supply voltage : TOO
LOW : NORMAL : TOO HIGH
TOO HIGH: 14 V or more
NORMAL: 9.5 V or 14V
TOO LOW: Below 9.5 V
-
SFRR
ABS solenoid (SFRR) : ON or
OFF
ON: Operates
OFF: Does not operate
-
SFRH
ABS solenoid (SFRH) : ON or
OFF
ON: Operates
-
SFLR
ABS solenoid (SFLR) : ON or
OFF
ON: Operates
-
SFLH
ABS solenoid (SFLH) : ON or
OFF
ON: Operates
-
SRRR (SRR)
ABS solenoid (SRRR [SRR]) : ON
or OFF
ON: Operates
-
SRRH (SRH)
ABS solenoid (SRRH [SRH]) : ON
or OFF
ON: Operates
-
SRLR
ABS solenoid (SRLR) : ON or
OFF
ON: Operates
-
SRLH
ABS solenoid (SRLH) : ON or
OFF
ON: Operates
-
SRCF (SA1)
TRAC solenoid (SRCF [SMCF]) :
ON or OFF
ON: Operates
-
SRCR (SA2)
TRAC solenoid (SRCR [SREA]) :
ON or OFF
ON: Operates
-
SRMF (SMCF, SA3)
TRAC solenoid (SRMF [SREC]) :
ON or OFF
ON: Operates
-
SRMR (SMCR, STR)
TRAC solenoid (SRMR [SMCR,
STR]) : ON or OFF
ON: Operates
-
VEHICLE SPD
Maximum wheel speed sensor
reading : min.: 0 MPH (0 km:h),
max.: 202 MPH (326 km:h)
Actual engine speed Speed indicated on speedometer
MAS CYL PRS 1
Master cylinder pressure sensor 1
reading : min.: 0 V, max.: 5 V
When brake pedal released : 0.3
V to 0.9 V
Reading increases when brake
pedal depressed
WHEEL DIR FR Front right wheel direction
Wheel direction BACK: BACK,
FORWARD: FORWARD
-
WHEEL DIR FL Front left wheel direction
FORWARD: FORWARD
-
WHEEL DIR RR Rear right wheel direction
FORWARD: FORWARD
-
WHEEL DIR RL Rear left wheel direction
FORWARD: FORWARD
-
SPD SEN FR
FR speed sensor open detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
SPD SEN FL
FL speed sensor open detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
SPD SEN RR
RR speed sensor open detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
SPD SEN RL
RL speed sensor open detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
EFI COM
EFI communication open
detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
Item
(Display)
BC54
BC
2. ACTIVE TEST
HINT:
Performing the ACTIVE TEST using the intelligent tester
allows relays and actuators to be operated without
removing any parts. Performing the ACTIVE TEST as
the first step of troubleshooting is one method of
shortening diagnostic time.
It is possible to display the DATA LIST during the
ACTIVE TEST.
(d) By following the prompts on the tester, perform the
ACTIVE TEST.
HINT:
The ignition switch must be turned on to proceed
to the ACTIVE TEST using the intelligent tester.
The motors stop automatically after 5 seconds of
activation to prevent them from being damaged.
When repeatedly activated, certain intervals are
required.
Each solenoid stops automatically after 2
seconds of activation to prevent them from being
damaged, and can be operated again after a
certain interval.
Do not depress the brake pedal while only the
pressure reduction solenoid valves are on.
YAWRATE SEN
Yaw rate sensor open detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
DECELE SEN
Deceleration sensor open
detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
STEERING SEN
Steering angle sensor open
detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
ACC SEN
open detection :
OPN_DET or NORMAL
OPN_DET: Momentary
interruption
NORMAL: Normal
-
ACCELERATOR % Different % of present accelerator
min.: 0
max.: 128
-
TORQUE Real output torque
min.: -1024
max.: 1016
-
TEST MODE Test mode : Normal or TEST
NORMAL: Normal mode
TEST: During test mode
-
MAS CYL PRESS 1
Master cylinder pressure sensor 1
reading : min.: 0V, max.: 5V
When brake pedal released: 0.3
to 0.9V
pedal depressed
ACC PRESS SENS
reading : min.: 0 V, max.: 5 V
min.: 3 V
max.: 5 V
If value constant regardless of
pump operation, accumulator
pressure sensor malfunction
suspected.
#CODES
Number of DTC recorded : min.:
0, max.: 255
min.: 0
max.: 255
-
Item
(Display)
BC55
BC
Do not drive 2 or more solenoids simultaneously
except to operate the pressure holding solenoid
valves and pressure reduction solenoid valves of
each wheel.
Item Test Details Diagnostic Note
SFRR Turns ABS solenoid (SFRR) ON or OFF
Operation of solenoid (clicking sound) can be
heard
SFRH Turns ABS solenoid (SFRH) ON or OFF
heard
SFLR Turns ABS solenoid (SFLR) ON or OFF
heard
SFLH Turns ABS solenoid (SFLH) ON or OFF
heard
SRRR Turns ABS solenoid (SrRR) ON or OFF
heard
SRRH Turns ABS solenoid (SRRH) ON or OFF
heard
SRLR Turns ABS solenoid (SRLR) ON or OFF
heard
SRLH Turns ABS solenoid (SFLH) ON or OFF
heard
SRCF (SA1) Turns TRAC solenoid SRCF (SMCF) ON or OFF
heard
SRCR (SA2) Turns TRAC solenoid SRCR (SREA) ON or OFF
heard
SRMF (SMCF, SA3)
Turns TRAC solenoid SRMF (SREC) ON or
OFF
heard
SRMR (SMCR, STR) Turns TRAC solenoid SRMR (STR) ON or OFF
heard
SOL RELAY Turns ABS solenoid relay ON or OFF
heard
ABS MOT RELAY Turns ABS motor relay ON or OFF Operation of motor can be heard
ABS WARN LIGHT Turns ABS warning light ON or OFF Operation of motor can be heard
VSC WARN LIGHT Turns VSC TRAC warning light ON or OFF Operation of motor can be heard
VSC/TRC OFF IND Turns VSC OFF indicator ON or OFF Operation of motor can be heard
SLIP INDI LIGHT Turn SLIP indicator light ON or OFF Operation of motor can be heard
BRAKE WRN LIGHT Turns BRAKE warning light ON or OFF Operation of motor can be heard
VSC/BR WARN BUZ Turns skid control buzzer ON or OFF Buzzer can be heard
STP LIGHT RELAY Turns stop light relay ON or OFF Observe stop light
BC56
BC
DIAGNOSTIC TROUBLE CODE CHART
NOTICE:
When removing any parts, turn the ignition switch off.
HINT:
If no abnormality is found when inspecting parts, check the
skid control ECU and check for poor contact at ground
points.
If a DTC is displayed during the DTC check, check the
circuit for the DTC listed in the table below. For details of
each DTC, refer to the page indicated.
When 2 or more DTCs are detected, perform circuit
inspections one by one until the problem is identified.
All DTCs in the table below are detected in accordance
with 1 trip detection logic.
DTC chart of ABS
DTC No. Detection Item Trouble Areas See page
C0200/31 (
*
1)
Front Speed Sensor RH Circuit
1. Front speed sensor RH
2. Front speed sensor RH circuit
3. Sensor installation
4. Skid control sensor wire
5. Master cylinder solenoid (skid
control ECU)
BC-59
C0205/32 (
*
1)
Front Speed Sensor LH Circuit
1. Front speed sensor LH
2. Front speed sensor LH circuit
control ECU)
BC-59
C0210/33 (
*
1)
Rear Speed Sensor RH Circuit
1. Rear speed sensor RH
2. Rear speed sensor RH circuit
control ECU)
BC-67
C0215/34 (
*
1)
Rear Speed Sensor LH Circuit
1. Rear speed sensor LH
2. Rear speed sensor LH circuit
control ECU)
BC-67
C0226/21 SFR Solenoid Circuit Master cylinder solenoid BC-74
C0236/22 SFL Solenoid Circuit Master cylinder solenoid BC-74
C0246/23 SRR Solenoid Circuit Master cylinder solenoid BC-74
C0256/24 SRL Solenoid Circuit Master cylinder solenoid BC-74
C0278/11
Open in ABS Solenoid Relay
Circuit
1. ABS SOL fuse
2. +BS terminal circuit
control ECU)
BC-76
C0279/12
Short to B+ in ABS Solenoid
Relay Circuit
1. ABS SOL fuse
control ECU)
BC-76
C1202/58
Brake Fluid Level Low / Open
Circuit in Brake Fluid Level
Warning Switch Circuit
1. Brake fluid level
2. Brake master cylinder reservoir
sub-assembly
(brake fluid level warning switch)
3. Brake fluid level warning switch
circuit
control ECU)
BC-83
BC57
BC
C1225/25 SMC Solenoid Circuit Master cylinder solenoid BC-74
C1226/26 SPC Solenoid Circuit Master cylinder solenoid BC-74
C1227/27 SRC Solenoid Circuit Master cylinder solenoid BC-74
C1228/28 STR Solenoid Circuit Master cylinder solenoid BC-74
C1235/35
Foreign Object is Attached on Tip
of Front Speed Sensor RH
control ECU)
BC-59
C1236/36
of Front Speed Sensor LH
control ECU)
BC-59
C1238/38
of Rear Speed Sensor RH
control ECU)
BC-67
C1239/39
of Rear Speed Sensor LH
control ECU)
BC-67
C1241/41 Low Battery Positive Voltage
1. Battery
2. Charging system
3. ECU-IG fuse
4. Power source circuit
control ECU)
BC-97
C1242/42 IG2 Power Source Circuit
1. Battery
2. Charging system
3. IGN fuse
4. Power source circuit
control ECU)
BC-101
C1243/43 (
*
1)
Deceleration Sensor Stuck
Malfunction
1. Yaw rate and deceleration
sensor
sensor circuit
BC-79
C1244/44
Open or Short in Deceleration
Sensor Circuit
sensor
sensor circuit
BC-79
C1245/45 (
*
1)
Deceleration Sensor Output
Malfunction
sensor
sensor circuit
BC-79
C1246/46
Master Cylinder Pressure Sensor
Malfunction
1. Hydraulic brake booster
(master cylinder pressure sensor)
2. Stop light switch circuit
control ECU)
BC-104
C1248/48
Open Circuit in Rear Differential
Lock
1. Rear differential lock position
switch
2. Rear differential lock position
switch circuit
control ECU)
BC-108
C1249/49 Open in Stop Light Switch Circuit
1. Stop light switch assembly
3. Master cylinder (skid control
ECU)
BC-111
C1251/51 (
*
4)
Open in Pump Motor Circuit
1. Brake booster pump assembly
control ECU)
BC-115
BC58
BC
HINT:
(
*
1), (
*
2):
Even after the trouble areas are repaired, the ABS warning
light will not go off unless the following operations are
performed.
(
*
1):
(a)Drive the vehicle at 12 mph (20 km/h) for 30 seconds or
more and check that the ABS warning light goes off.
(b)Clear the DTC.
(
*
2):
(a)Keep the vehicle stationary for 5 seconds or more and
depress the brake pedal several times.
(b)Repeat the above operation 3 times or more and check
that the ABS warning light goes off.
(c) Clear the DTC.
(
*
3): 4WD only
(
*
4): Skid control buzzer sounds.
C1252/52 (
*
2) (
*
4)
Brake Booster Pump Motor on
Time Abnormally Long
(accumulator pressure sensor)
control ECU)
BC-117
C1253/53 (
*
2)
Hydro Booster Pump Motor Relay
Malfunction
1. ABS MTR fuse
control ECU)
BC-120
C1254/54 Pressure Switch Circuit
1. Master cylinder solenoid
(skid control ECU)
BC-124
C1256/56 (
*
2) (
*
4)
Accumulator Low Pressure
1. Hydraulic circuit
control ECU)
BC-127
C1257/57 IG Power Source
control ECU)
BC-130
C1268/68 (
*
3)
Transfer "L4" Position Switch
Circuit
1. Transfer indicator switch (L4
position)
position) circuit
control ECU)
BC-138
C1337/37
Different Diameter Tire
Malfunction
1. Speed sensor circuit
2. Tire sizes
control ECU)
BC-142
C1381/97
Yaw Rate and / or Acceleration
Sensor Power Supply Voltage
Malfunction
sensor
sensor circuit
BC-79
U0073/94
Control Module Communication
Bus OFF
CAN communication system BC-149
U0124/95
Lost Communication with Lateral
Acceleration Sensor Module
BC59
BC
DTC chart of VSC
C1201/51
Engine Control System
Malfunction
Engine control system BC-82
C1203/53
ECM Communication Circuit
Malfunction
1. CAN communication system
2. ECM
BC-86
C1210/36
Zero Point Calibration of Yaw
Rate Sensor Undone
1. Yaw rate sensor and
deceleration sensor
2. Zero point calibration not
complete
3. PNP switch circuit (P position)
(A/T)
4. Parking brake switch circuit (M/
T)
control ECU)
BC-87
C1223/43 ABS Control System Malfunction ABS control system BC-92
C1231/31
Steering Angle Sensor Circuit
Malfunction
1. Steering angle sensor
2. Steering angle sensor circuit
3. CAN communication system
control ECU)
BC-93
C1232/32 Stuck in Deceleration Sensor
sensor
sensor circuit
BC-79
C1234/34 Yaw Rate Sensor Malfunction
sensor
sensor circuit
BC-79
C1258/58
Transfer 4WD Position Switch
Circuit
1. Transfer indicator switch (4WD
position) (A/T)
position) circuit (A/T)
3. Transfer indicator switch
(center differential lock position)
(M/T)
circuit (A/T)
control ECU)
BC-131
C1290/66
Steering Angle Sensor Zero Point
Malfunction
Steering angle sensor BC-93
C1336/39
Zero Point Calibration of
Acceleration Sensor Undone
1. Yaw rate sensor and
deceleration sensor
2. Zero point calibration not
complete
3. PNP switch circuit (P position)
(A/T)
4. Parking brake switch circuit (M/
T)
control ECU)
BC-87
C1380/64
Stop Light Control Relay
Malfunction
1. Stop light switch assembly
3. Stop LP CTRL relay
control ECU)
BC-144
U0100/65
Lost Communication with ECM /
PCM
U0123/62
Lost Communication with Yaw
Rate Sensor Module
U0126/63
Lost Communication with
Steering Angle Sensor Module
BC60
BC
Test Mode DTC of ABS
C1271/71
Low Output Signal of Front Speed
Sensor RH (Test Mode DTC)
control ECU)
BC-59
C1272/72
Low Output Signal of Front Speed
Sensor LH (Test Mode DTC)
control ECU)
BC-59
C1273/73
Low Output Signal of Rear Speed
Sensor RH (Test Mode DTC)
control ECU)
BC-67
C1274/74
Low Output Signal of Rear Speed
Sensor LH (Test Mode DTC)
control ECU)
BC-67
C1275/75
Abnormal Change in Output
Signal of Front Speed Sensor RH
(Test Mode DTC)
control ECU)
BC-59
C1276/76
Signal of Front Speed Sensor LH
(Test Mode DTC)
control ECU)
BC-59
C1277/77
Signal of Rear Speed Sensor RH
(Test Mode DTC)
control ECU)
BC-67
C1278/78
Signal of Rear Speed Sensor LH
(Test Mode DTC)
control ECU)
BC-67
C1279/79
Deceleration Sensor Output
Voltage Malfunction (Test Mode
DTC)
sensor
sensor circuit
BC-79
C1281/81
Master Cylinder Pressure Sensor
Output Malfunction (Test Mode
DTC)
control ECU)
BC-104
C1282/82
Center Differential Lock Position
Switch Malfunction (Test Mode
DTC)
position) (A/T)
position) circuit (A/T)
(M/T)
circuit (A/T)
control ECU)
BC-131
BC61
BC
Test Mode DTC of VSC
C1283/83
L4 Position Switch Malfunction
(Test Mode DTC)
position)
position) circuit
control ECU)
BC-138
C0371/71
Yaw Rate Sensor (Test Mode
DTC)
sensor
sensor circuit
BC-79
BC62
BC
DESCRIPTION
The speed sensors detect the wheel speeds and send appropriate signals to the skid control ECU. Speed
sensor rotors have rows of alternating N and S magnetic poles, and their magnetic fields change as the
rotors turn.
The speed sensors detect those magnetic changes and send pulse signals to the skid control ECU. The
ECU monitors the wheel speeds through these pulse signals to control the ABS system.
DTC C0200/31 Front Speed Sensor RH Circuit
DTC C0205/32 Front Speed Sensor LH Circuit
DTC C1235/35
Foreign Object is Attached on Tip of Front
Speed Sensor RH
DTC C1236/36
Foreign Object is Attached on Tip of Front
Speed Sensor LH
DTC C1271/71
Low Output Signal of Front Speed Sensor RH
(Test Mode DTC)
DTC C1272/72
Low Output Signal of Front Speed Sensor LH
(Test Mode DTC)
DTC C1275/75
Abnormal Change in Output Signal of Front
Speed Sensor RH (Test Mode DTC)
DTC C1276/76
Abnormal Change in Output Signal of Front
Speed Sensor LH (Test Mode DTC)
Speed Sensor
Sensor Rotor
High Speed
Low Speed
Forward Back
26 mA
14 mA
7 mA
N
N
S
S
C135276E01
BC63
BC
DTC No. DTC Detecting Conditions Trouble Areas
C0200/31
C0205/32
When any one of following conditions met:
1. At vehicle speed of 6 mph (10 km/h) or more,
speed sensor signal circuit open or short for 1
second or more.
2. Speed sensor signal open circuit occurs at least
255 times.
3. Speed sensor signal circuit open for 0.5 seconds or
more.
4. With ignition switch on and vehicle speed at 2 mph
(3 km/h) or more, 3 wheels output reverse rotation
signals and 1 wheel outputs high-frequency pulse
75 times.
speed sensor output halves for 5 seconds.
changing of normal rotation signal and reverse
rotation signal occurs 7 times within 0.006 seconds
while ignition switch on.
7. Signal output of any one wheel different from
signals of other 3 wheels for 1 second, at vehicle
speed of 18 mph (30 km/h) or more.
8. Reverse rotation signal produced for 1 second or
more at vehicle speed of 62 mph (100 km/h) or
more.
9. At vehicle speed of 18 mph (30 km/h) or more, one
speed sensor malfunctions and differs in signal
direction from other 3 wheels.
10. When voltage at IG1 terminal 9.5 V or more,
voltage of sensor power supply decreases for 0.5
seconds or more.
Front speed sensor
Front speed sensor circuit
Sensor installation
C1235/35
C1236/36
When either of following conditions (1 or 2) detected:
noise in speed sensor signal continues for 5
seconds or more.
2. At vehicle speed of 6 mph (10 km/h) or more, noise
detected as rotor turns, for 15 seconds or more.
Front speed sensor
C1271/71
C1272/72
Detected only during test mode.
Front speed sensor
Sensor installation
C1275/75
C1276/76
Front speed sensor
Front speed sensor rotor
BC64
BC
WIRING DIAGRAM
INSPECTION PROCEDURE
NOTICE:
When replacing the master cylinder solenoid, perform zero point calibration (See page BC-24).
Check the speed sensor signal in test mode after clearing or replacement (See page BC-28).
(d) Using a intelligent tester, check for any momentary
interruption in the wire harness and connector
corresponding to a DTC.
Select the following menu items: DIAGNOSIS / OBD/
MOBD / select vehicle / ABS/VSC / DATA LIST.
DATA LIST: ABS/VSC
OK:
There are no momentary interruptions.
HINT:
Perform the above inspection before removing the
sensor and connector.
1 CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
Front Speed
Sensor LH
Front Speed
Sensor RH
Skid Control ECU
FL+
FL-
FR-
FR+
C117849E02
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item (Display) Measurement Item / Range (Display) Normal Condition
SPD SEN FR
FR speed sensor open detection: OPN_DET or
NORMAL
OPN_DET: Momentary interruption
NORMAL: Normal
SPD SEN FL
FL speed sensor open detection: OPN_DET or
NORMAL
NORMAL: Normal
BC65
BC
NG
OK
(d) Read the wheel speed value using the intelligent tester.
(e) Select the item "FR (FL) Wheel Speed" in the DATA LIST
and read the value displayed on the intelligent tester.
DATA LIST: ABS/VSC
(f) Check that there is no significant difference between the
speed value displayed on the intelligent tester and the
speed value displayed on the speedometer when driving
the vehicle.
OK:
There is almost no difference in the displayed
speed values.
HINT:
There is a tolerance of +- 10% in the speedometer
indication.
NG
OK
(a) Perform a TEST MODE inspection and check for DTCs
(See page BC-28).
OK:
No DTC output.
NG
OK
(a) Clear the DTC(s) (See pageBC-45 ).
REPAIR OR REPLACE HARNESS OR
CONNECTOR
2 READ VALUE OF DATA LIST (FRONT SPEED SENSOR)
Item (Display)
(Display)
WHEEL SPD FR
Wheel speed sensor (FR) reading
: min.: 0 mph (0 km/h), max.: 202
mph (326 km/h)
Actual wheel speed
Similar to speed indicated on
speedometer
WHEEL SPD FL
Wheel speed sensor (FL) reading
: min.: 0 mph (0 km/h), max.: 202
mph (326 km/h)
Actual wheel speed
Similar to speed indicated on
speedometer
Go to step 5
3 PERFORM TEST MODE INSPECTION (SIGNAL CHECK)
CONNECTOR
4 RECONFIRM DTC
BC66
BC
(b) Start the engine.
(c) Drive the vehicle at a speed of 12 mph (20 km/h) or more
for at least 60 seconds.
(d) Check if the same DTC(s) is output (See page BC-45).
Result
B
A
(a) Check that the speed sensor installation bolt is tightened
properly.
OK:
The installation bolt is tightened properly.
Torque: 8.0 N*m (82 kgf*cm, 72 in.*lbf)
NG
OK
(a) Visually check the speed sensor for deformation and
damage.
OK:
No scratches or foreign matter on the speed
sensor tip.
No deformation or damage.
There is no gap between the sensor and steering
knuckle.
NG
OK
Result Proceed to
DTC not output A
DTC output B
Go to step 11
END
5 CHECK FRONT SPEED SENSOR INSTALLATION
8.0 N*m
(82 kgf*cm,
71 in.*lbf)
No clearance
OK NG
I044006E02
TIGHTEN BOLT PROPERLY
6 CHECK FRONT SPEED SENSOR
REPLACE FRONT SPEED SENSOR
BC67
BC
(a) Disconnect the skid control sensor wire.
(b) Measure the resistance.
Standard resistance (LH)
Standard resistance (RH)
NG
OK
(a) Disconnect the skid control ECU connector and the front
speed sensor connector.
NG
7 INSPECT SKID CONTROL SENSOR WIRE
1 2
1 2
Skid Control Sensor Wire:
Sensor Side Connector:
Vehicle Side Connector:
W1
V1
*1
*2
*1: LH
*2: RH
AW1
AV1
*1
*2
C135284E01
Tester Connection Specified Condition
W1-1 - AW1-1 Below 1
W1-1 - AW1-2 10 k or higher
W1-1 - Body ground 10 k or higher
W1-2 - AW1-1 10 k or higher
W1-2 - AW1-2 Below 1
W1-2 - Body ground 10 k or higher
V1-1 - AV1-1 Below 1
V1-1 - AV1-2 10 k or higher
V1-1 - Body ground 10 k or higher
V1-2 - AV1-1 10 k or higher
V1-2 - AV1-2 Below 1
V1-2 - Body ground 10 k or higher
REPLACE SKID CONTROL SENSOR WIRE
8 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FRONT SPEED SENSOR)
1 2
Skid Control ECU
(harness side connector):
Front Speed Sensor
A4
W1
V1
*1: LH
*2: RH
*1
*2
FL+
FR+
FR-
FL-
C138455E01
A4-18 (FL+) - W1-2 Below 1
A4-18 (FL+) - Body ground 10 k or higher
A4-4 (FL-) - W1-1 Below 1
A4-4 (FL-) - Body ground 10 k or higher
A4-3 (FR+) - V1-2 Below 1
A4-3 (FR+) - Body ground 10 k or higher
A4-17 (FR-) - V1-1 Below 1
A4-17 (FR-) - V1-1 10 k or higher
CONNECTOR
BC68
BC
OK
(a) Disconnect the speed sensor connector.
(c) Measure the voltage.
Standard voltage (LH)
Standard voltage (RH)
NG
OK
(a) Clear the DTC(s) (See page BC-45).
Result
B
A
(a) Replace the front speed sensor.
NEXT
9 INSPECT FRONT SPEED SENSOR (INPUT VOLTAGE)
1 2 1 2
Skid Control Sensor Wire
(sensor side connector):
W1 V1
*1 *2
*1: LH
*2: RH
C138456E01
W1-2 - Body ground 5.7 to 17.3 V
V1-2 - Body ground 5.7 to 17.3 V
REPLACE MASTER CYLINDER SOLENOID
10 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
11 REPLACE FRONT SPEED SENSOR
12 RECONFIRM DTC
BC69
BC
Result
B
A
Result Proceed to
DTC output A
DTC not output B
END
BC70
BC
DESCRIPTION
Refer to DTC C0200/31 (See page BC-59).
DTC C0210/33 Rear Speed Sensor RH Circuit
DTC C0215/34 Rear Speed Sensor LH Circuit
DTC C1238/38
Foreign Object is Attached on Tip of Rear
Speed Sensor RH
DTC C1239/39
Foreign Object is Attached on Tip of Rear
Speed Sensor LH
DTC C1273/73
Low Output Signal of Rear Speed Sensor RH
(Test Mode DTC)
DTC C1274/74
Low Output Signal of Rear Speed Sensor LH
(Test Mode DTC)
DTC C1277/77
Abnormal Change in Output Signal of Rear
Speed Sensor RH (Test Mode DTC)
DTC C1278/78
Abnormal Change in Output Signal of Rear
Speed Sensor LH (Test Mode DTC)
C0210/33
C0215/34
When any of following conditions detected:
1. At vehicle speed of 6 mph (10 km/h) or
more, open or short in sensor signal
circuit continues for 1 second or more.
2. Momentary interruption of sensor signal
from abnormal wheel occurs 255 times or
more.
3. Open in speed sensor signal circuit
continues for 0.5 seconds or more.
4. With IG1 terminal voltage 9.5 V or more,
sensor power supply voltage decreases
for 0.5 seconds or more.
5. When vehicle driven at speed of more
than 10 km/h (6 mph), one of wheel
speeds below one-seventh of other wheel
speeds for 15 seconds or more.
Rear speed sensor
Rear speed sensor circuit
Sensor installation
Master cylinder solenoid (skid control
ECU)
C1238/38
C1239/39
When either of following conditions (1 or 2)
detected:
more, noise in speed sensor signal
continues for 5 seconds or more.
more, noise detected as rotor turns, for 15
seconds or more.
Rear speed sensor
ECU)
BC71
BC
WIRING DIAGRAM
NOTICE:
Check the speed sensor signal in test mode after clearing or replacement (See page BC-28).
(d) Using the intelligent tester, check for any momentary
interruption in the wire harness and connector of the
speed sensor.
C1273/73
C1274/74
Rear speed sensor
Sensor installation
ECU)
C1277/77
C1278/78
Rear speed sensor
ECU)
1 CHECK HARNESS AND CONNECTOR (MOMENTARY INTERRUPTION)
Skid Control ECU
Rear Speed
Sensor LH
Rear Speed
Sensor RH
RL+
RR-
RL-
RR+
C117849E06
Intelligent Tester
DLC3
CAN VIM
H102157E03
BC72
BC
DATA LIST: ABS/VSC
OK:
HINT:
Perform the above inspection before removing the
sensor and connector.
NG
OK
(b) Start the engine and drive the vehicle.
(d) Select the following menu items: DIAGNOSIS / OBD/
(e) Select the item "RR (RL) WHEEL SPD" in the DATA
LIST and read the value displayed on the intelligent
tester.
DATA LIST: ABS/VSC
(f) Check that there is no significant difference between the
speed value displayed on the intelligent tester and the
speed value displayed on the speedometer when driving
the vehicle.
OK:
There is no significant difference in the displayed
speed values.
HINT:
There is a tolerance of +- 10% in the speedometer
indication.
NG
OK
(a) Perform a TEST MODE inspection and check for DTCs
(See page BC-28).
SPD SEN RR
RR speed sensor open detection / OPN_DET or
NORMAL
NORMAL: Normal
SPD SEN RL
RL speed sensor open detection / OPN_DET or
NORMAL
NORMAL: Normal
CHECK AND REPLACE HARNESS OR
CONNECTOR
2 READ VALUE OF DATA LIST
WHEEL SPD RR
Wheel speed sensor (RR) reading : min.: 0 mph
(0 km/h), max.: 202 mph (326 km/h)
Similar to speed indicated on speedometer
WHEEL SPD RL
Wheel speed sensor (RL) reading : min.: 0 mph
(0 km/h), max.: 202 mph (326 km/h)
Similar to speed indicated on speedometer
Go to step 5
3 PERFORM TEST MODE INSPECTION
BC73
BC
NG
OK
Result
B
A
(a) Check that the speed sensor installation bolt is tightened
properly.
OK:
The installation bolt is tightened properly.
NG
OK
(a) Visually check the speed sensor for deformation and
damage.
OK:
No deformation or damage.
There is no gap between the sensor and rear axle
carrier.
NG
CONNECTOR
4 RECONFIRM DTC
Result Proceed to
DTC not output A
DTC output B
Go to step 11
END
5 CHECK REAR SPEED SENSOR INSTALLATION
8.0 N*m
(82 kgf*cm,
71 in.*lbf)
No clearance
OK NG
I044006E02
TIGHTEN BOLT PROPERLY
6 CHECK REAR SPEED SENSOR
REPLACE REAR SPEED SENSOR
BC74
BC
OK
(a) Disconnect the rear speed sensor wire.
NG
OK
7 INSPECT SKID CONTROL SENSOR WIRE
1 2 1 2
1 2
3 4
Skid Control Sensor Wire:
Sensor Side Connector:
Vehicle Side Connector:
OX1
X2 X1
*1 *2
*1: LH
*2: RH
C138457E01
X2-2 - OX1-1 10 k or higher
X2-2 - OX1-2 Below 1
X2-2 - Body ground 10 k or higher
REPLACE SKID CONTROL SENSOR WIRE
BC75
BC
(a) Disconnect the skid control ECU connector.
(b) Disconnect the rear speed sensor connector.
(c) Measure the resistance.
NG
OK
(a) Disconnect the rear speed sensor connector.
Standard voltage (LH)
Standard voltage (RH)
NG
OK
8 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - SKID CONTROL SENSOR)
1 2
Skid Control ECU
Rear Speed Sensor
A4
X2
X1
*1: LH
*2: RH
*1
*2
RL+
RR+
RR-
RL-
C138455E02
A4-20 (RL+) - X2-2 Below 1
A4-6 (RL-) - X2-1 Below 1
A4-5 (RR+) - X1-2 Below 1
A4-19 (RR-) - X1-1 Below 1
CONNECTOR
9 CHECK SKID CONTROL SENSOR (INPUT VOLTAGE)
1 2 1 2
Skid Control Sensor Wire
(sensor side connector):
X2 X1
*1 *2
*1: LH
*2: RH
C138456E02
X2-2 - Body ground 5.7 to 17.3 V
X1-2 - Body ground 5.7 to 17.3 V
10 RECONFIRM DTC
BC76
BC
Result
B
A
(a) Replace the rear speed sensor (See page BC-198).
NEXT
Result
B
A
Result Proceed to
DTC output A
DTC not output B
END
11 REPLACE REAR SPEED SENSOR
12 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC77
BC
DESCRIPTION
The solenoid goes on when signals are received from the skid control ECU and controls the pressure
action on the wheel cylinders thus controlling the braking force.
NOTICE:
HINT:
These DTCs are set when a problem is identified in the
The solenoid circuit is in the master cylinder solenoid.
DTC C0226/21 SFR Solenoid Circuit
DTC C0236/22 SFL Solenoid Circuit
DTC C0246/23 SRR Solenoid Circuit
DTC C0256/24 SRL Solenoid Circuit
DTC C1225/25 SMC Solenoid Circuit
DTC C1226/26 SPC Solenoid Circuit
DTC C1227/27 SRC Solenoid Circuit
DTC C1228/28 STR Solenoid Circuit
C0226/21
Open or short in SFRH or SFRR circuit continues for
0.05 seconds or more.
Master cylinder solenoid
C0236/22
Open or short in SFLH or SFLR circuit continues for
C0246/23
Open or short in SRRH or SRRR circuit continues for
C0256/24
Open or short in SRLH or SRLR circuit continues for
C1225/25
Open or short in SMCR circuit continues for 0.05
seconds or more.
C1226/26
Open or short in SREA circuit continues for 0.05
seconds or more.
C1227/27
Open or short in SREC circuit continues for 0.05
seconds or more.
C1228/28
Open or short in STR circuit continues for 0.05 seconds
or more.
1 RECONFIRM DTC
BC78
BC
Therefore, solenoid circuit inspection and solenoid unit
inspection cannot be performed. Be sure to check if the DTCs
are output before replacing the master cylinder solenoid.
(a) Clear the DTC (See page BC-45).
(b) Check if the same DTCs are detected.
Result
B
A
Result Proceed to
DTC output A
DTC not output B
END
BC79
BC
DESCRIPTION
The solenoid relay supplies power to the ABS solenoid and TRAC solenoid.
After the ignition switch is turned on, the vehicle speed has reached 4 mph (6 km/h) and the solenoid is
determined to be normal by the initial check self- diagnosis, the relay switches on. If any open or short
circuits are detected, the relay switches off.
These DTCs may be set if the voltage supply to the solenoid relay (+BS) falls below the DTC detection
threshold due to the battery or generator outputs being insufficient.
WIRING DIAGRAM
DTC C0278/11 Open in ABS Solenoid Relay Circuit
DTC C0279/12 Short to B+ in ABS Solenoid Relay Circuit
DTC No. DTC Detecting Condition Trouble Areas
C0278/11
When either of following conditions detected:
1. Both of following conditions continue for at least 0.2
seconds.
(a) IG voltage between 9.5 V and 17 V.
(b) Relay contact open when relay ON
seconds.
(a) IG voltage 9.5 V or less when relay ON.
(b) Relay contact remains open.
ABS SOL fuse
+BS terminal circuit
C0279/12
Following condition continues for at least 0.2 seconds.
Relay contact closed immediately after turning IG
switch to ON when relay OFF.
ABS SOL fuse
+BS terminal circuit
Skid Control ECU
ABS SOL
GND1
GND2
GND3
+BS
Battery
C135277E01
BC80
BC
NOTICE:
(a) Remove the ABS SOL fuse from the engine room R/B
No. 2.
Standard resistance:
Below 1
NG
OK
(b) Measure the voltage.
Standard voltage
NG
OK
1 INSPECT FUSE (ABS SOL)
Engine Room R/B No. 2:
ABS SOL Fuse
C135278E01
CHECK FOR SHORTS IN ALL HARNESSES
AND CONNECTORS CONNECTED TO FUSE
AND REPLACE FUSE
2 CHECK SKID CONTROL ECU TERMINAL VOLTAGE (+BS)
Skid Control ECU
+BS GND2
GND1
A4
C121700E77
A4-31 (+BS) - A4-1, 32 (GND1, GND2) 11 to 14 V
CONNECTOR
BC81
BC
Standard resistance
NG
OK
(b) Check if the same DTC(s) is output (See page BC-45).
B
OK
3 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)
Skid Control ECU
A4
A5
GND1 GND2
GND3
C124799E04
A4-1, 32 (GND1, GND2) - Body
ground
Below 1
A5-4 (GND3) - Body ground Below 1
CONNECTOR
4 RECONFIRM DTC
END
BC82
BC
DESCRIPTION
The skid control ECU receives signals from the yaw rate sensor and deceleration sensor via the CAN
The deceleration sensor is built into the yaw rate sensor.
If there is trouble in the bus lines between the yaw rate sensor and deceleration sensor and the CAN
communication system, DTC U0123/62 (yaw rate sensor communication trouble) and U0124/95
(deceleration sensor communication trouble) are output.
DTC C0371/71 Yaw Rate Sensor (Test Mode DTC)
DTC C1232/32 Stuck in Deceleration Sensor
DTC C1234/34 Yaw Rate Sensor Malfunction
DTC C1243/43 Deceleration Sensor Stuck Malfunction
DTC C1244/44 Open or Short in Deceleration Sensor Circuit
DTC C1245/45 Deceleration Sensor Output Malfunction
DTC C1279/79
Deceleration Sensor Output Voltage Malfunc-
tion (Test Mode DTC)
DTC C1381/97
Yaw Rate and / or Acceleration Sensor Power
Supply Voltage Malfunction
C0371/71 Detected only during test mode
C1232/32
At vehicle speed of 6 mph (10 km/h) or more, signal
from either GL1 or GL2 does not change for 30
seconds or more.
C1234/34
Sensor malfunction signal received from yaw rater
sensor.
C1243/43
Following condition repeats 16 times.
GL1 and GL2 do not change by more than 2LSB
when vehicle decelerates from 19 mph (30 km/h) to
0 mph (0 km/h).
C1244/44
When either of following (1 or 2) detected:
1. Both of following conditions continue for at least 60
seconds.
(a) Vehicle stopped.
(b) Difference between GL1 and GL2 does not
drop below 0.4 G once it reaches 0.6 G or
more.
2. Data malfunction signal received from deceleration
sensor.
C1245/45
Following condition continues for at least 60 seconds.
Difference between values calculated from
deceleration sensor value and vehicle speed
exceeds 0.35 G.
BC83
BC
WIRING DIAGRAM
NOTICE:
When replacing the yaw rate and deceleration sensor, perform zero point calibration (See page
BC-24).
HINT:
When U0073/94, U0123/62, U0124/95 or U0126/63 are output together with C1232/32 or C1234/34,
inspect and repair the trouble areas indicated by U0073/94, U0123/62, U0124/95 or U0126/63 first.
(b) Check if the DTCs U0073/94, U0123/62, C1210/36 and/
or C1336/39 are detected (See page BC-45).
Result
C1381/97
Deceleration sensor power source malfunction signal
received for at least 10 seconds at speed of more than
2 mph (3 km/h).
1 CHECK DTC
Skid Control ECU
Yaw Rate and
Deceleration Sensor
Ignition Switch
CANH CANH
CANL CANL GND
IG
ECU-IG
AM1
ALT
Battery
C135283E01
Result Proceed to
DTC U0073/94, U0123/62, C1210/36 and/or C1336/39 not output A
BC84
BC
B
C
A
(a) Disconnect the yaw rate and deceleration sensor
connector.
Standard voltage
Standard resistance
Result
B
C
A
DTC U0073/94 and/or U0123/62 output B
DTC C1210/36 and/or C1336/39 output C
Result Proceed to
REPAIR CAN COMMUNICATION SYSTEM
REPAIR CIRCUITS INDICATED BY OUTPUT
DTCS
2 INSPECT YAW RATE AND DECELERATION SENSOR
Yaw Rate Sensor
E34
IG GND
C121701E03
Tester Connection Condition Specified Condition
E34-5 (IG) - Body
ground
Ignition switch ON 11 to 14 V
E34-1 (GND) - Body
ground
Ignition switch OFF Below 1
Result Proceed to
OK (When troubleshooting in accordance with DTC CHART) A
OK (When troubleshooting in accordance with PROBLEM
SYMPTOMS TABLE)
B
NG C
PROCEED TO NEXT CIRCUIT INSPECTION
SHOWN IN PROBLEM SYMPTOMS TABLE
CONNECTOR
REPLACE YAW RATE AND DECELERATION SENSOR
BC85
BC
DESCRIPTION
If trouble occurs in the engine control system, the skid control ECU disables TRAC, A-TRAC and VSC
controls.
(a) Check if any DTC is recorded for the engine control
system (See page ES-38).
Result
B
A
DTC C1201/51 Engine Control System Malfunction
C1201/51 Malfunction signal received from ECM Engine control system
1 CHECK DTC (ENGINE CONTROL SYSTEM)
Result Proceed to
DTC output A
DTC not output B
REPLACE ECM
REPAIR ENGINE CONTROL SYSTEM
BC86
BC
DESCRIPTION
The brake fluid level warning switch sends the appropriate signal to the skid control ECU when the brake
fluid level drops.
WIRING DIAGRAM
NOTICE:
HINT:
When C1241/41 and/or C1242/42 is output together with C1202/58, inspect and repair the trouble areas
indicated by C1241/41 and/or C1242/42 first.
DTC C1202/58
Brake Fluid Level Low / Open Circuit in Brake
Fluid Level Warning Switch Circuit
C1202/58
1. Fluid level of brake master cylinder reservoir tank
stays low for 30 seconds or more when vehicle
stops, or for 60 seconds or more when driving.
2. With ECU terminal IG1 voltage 9.5 V to 17.2 V,
open circuit for brake fluid level warning switch
circuit continues for 2 seconds or more.
3. Fluid level of master cylinder reservoir tank LOW
for 4 seconds or 40 seconds after ignition switch
turned ON, or for 7 seconds during pump motor
operation.
Brake fluid level
Brake master cylinder reservoir sub-assembly
(brake fluid level warning switch)
Brake fluid level warning switch circuit
1 CHECK BRAKE FLUID LEVEL
Skid Control ECU
Brake Fluid Level Warning Switch
LBL
C135279E01
BC87
BC
(b) Depress the brake pedal 20 times or more (until the
pedal reaction feels light and pedal stroke becomes
longer).
HINT:
When the ignition switch is turned on, brake fluid is sent
to the accumulator and the fluid level decreases by
approximately 5 mm from the level when the ignition
switch is off (normal).
NOTICE:
Do not move the wheels with the ignition switch off.
OK:
Brake fluid level is correct.
NG
OK
(a) Disconnect the brake fluid level warning switch
connector.
Standard resistance
NOTICE:
If there is no problem after finishing the above
check, adjust the brake fluid level to the maximum
level.
NG
OK
CHECK FOR LEAKAGE AND REPAIR
2 INSPECT BRAKE FLUID LEVEL WARNING SWITCH
Brake Fluid Level
Warning Switch:
F052341E02
1 - 2 Float UP (Switch OFF) 1.9 k to 2.1 k
1 - 2
Float DOWN (Switch
ON)
Below 1
REPLACE BRAKE MASTER CYLINDER
RESERVOIR SUB-ASSEMBLY
BC88
BC
(b) Disconnect the brake fluid level warning switch
connector.
Standard resistance
NG
OK
(b) Check if the same DTC is output (See page BC-45).
Result
B
A
3
CHECK HARNESS AND CONNECTOR (BRAKE FLUID LEVEL WARNING SWITCH - SKID
CONTROL ECU)
1 2
Skid Control ECU
LBL
A4
A14
C124798E02
A4-41 (LBL) - A14-2 Below 1
A4-41 (LBL) - Body ground 1.9 k to 2.1 k
CONNECTOR
4 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC89
BC
DESCRIPTION
The circuit sends TRAC, A-TRAC and VSC control information from the skid control ECU to the ECM, and
engine control information from the ECM to the skid control ECU via the CAN communication system.
(a) Check if any DTC is recorded for the CAN
communication system (See page CA-14).
Result
B
A
(a) Check if any DTC is recorded for the engine control
system (See page ES-38).
Result
B
A
DTC C1203/53 ECM Communication Circuit Malfunction
C1203/53
Information relating to engine drive source or
destination stored in ECM does not match that stored in
skid control ECU.
ECM
1 CHECK DTC (CAN COMMUNICATION SYSTEM)
Result Proceed to
DTC not output A
DTC output B
2 CHECK DTC (ENGINE CONTROL SYSTEM)
Result Proceed to
DTC output A
DTC not output B
REPLACE ECM
REPAIR ENGINE CONTROL SYSTEM
BC90
BC
DESCRIPTION
The skid control ECU receives signals from the yaw rate sensor and deceleration sensor via the CAN
The deceleration sensor is built into the yaw rate sensor.
If there is trouble in the bus lines between the yaw rate sensor and deceleration sensor and the CAN
communication system, the DTCs U0123/62 (yaw rate sensor communication trouble) and U0124/95
(deceleration sensor communication trouble) are output.
These DTCs are also output when the calibration has not been completed.
DTC C1210/36
Zero Point Calibration of Yaw Rate Sensor
Undone
DTC C1336/39
Zero Point Calibration of Acceleration Sensor
Undone
C1210/36
When either of following 1 or 2 detected:
1. When battery terminal connected, shift lever moved
to non-P position (A/T) or parking brake OFF (M/T)
within 15 seconds of ECU terminal IG1 initially
turned ON.
2. Yaw rate sensor zero point recorded in ECU
deleted.
Yaw rate sensor and deceleration sensor
Zero point calibration not complete
PNP switch circuit (P position) (A/T)
Parking brake switch circuit (M/T)
C1336/39
When either of following 1 or 2 detected:
1. In TEST mode, shift lever shifted to non-P position
(A/T) or parking brake OFF (M/T) 2 seconds after
ECU terminal IG1 initially turned ON.
2. Deceleration sensor zero point recorded in ECU
deleted.
Yaw rate sensor and deceleration sensor
Zero point calibration not complete
PNP switch circuit (P position) (A/T)
Parking brake switch circuit (M/T)
BC91
BC
WIRING DIAGRAM
HINT:
When U0073/94, U0100/65, U0123/62, U0124/95 or U0126/63 are output accompanied by C1210/36 or
C1336/39, inspect and repair the trouble areas indicated by U0073/94, U0100/65,U0123/62, U0124/95 or
U0126/63 first.
(a) Perform the zero point calibration of the yaw rate sensor
and deceleration sensor (See page BC-24).
NEXT
(a) Clear the DTCs (See page BC-45).
(b) Check if the same DTCs are recorded (See page BC-
45).
Result
1 PERFORM YAW RATE AND DECELERATION SENSOR ZERO POINT CALIBRATION
Skid Control ECU
Yaw Rate and
Deceleration Sensor
Park/Neutral Position Switch
CANH
CANL
CANH
CANL
P
PKB
C135280E01
2 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
BC92
BC
B
A
(a) Check that the yaw rate and deceleration sensor has
been installed properly (See page BC-202).
OK:
The sensor is tightened to the specified torque.
The sensor is not tilted.
NG
OK
(a) A/T
(1) Disconnect the skid control ECU connector.
(2) Disconnect the Park/Neutral position switch
connector.
(3) Measure the resistance.
Standard resistance
END
3 CHECK YAW RATE AND DECELERATION SENSOR INSTALLATION
INSTALL YAW RATE SENSOR CORRECTLY
4
CHECK HARNESS AND CONNECTOR (ECU - PARK/NEUTRAL POSITION SWITCH OR
PARKING BRAKE SWITCH)
Skid Control ECU
A4
P/R
Park/Neutral Position Switch
B35
PL
F052381E02
A4-14 (P/R) - B35-6 (PL) Below 1
BC93
BC
(b) M/T:
(1) Disconnect the skid control ECU connector.
(2) Disconnect the parking brake switch connector.
Standard resistance
NG
OK
(a) Inspect the Park/Neutral Position (PNP) switch (for A/T
models).
(1) Disconnect the PNP switch connector.
(2) Check the resistance when the transmission gear
selector lever is moved to each position.
Standard resistance
(b) Inspect the parking brake switch (for M/T models).
(1) Disconnect the parking brake switch connector.
Standard resistance
1
Skid Control ECU
A4
E22
PKB
C124797E02
A4-28 (PKB) - E22-1 Below 1
CONNECTOR
5 INSPECT PARK/NEUTRAL POSITION SWITCH OR PARKING BRAKE SWITCH
PNP Switch:
C124790E04
Gear Selector Lever
Positions
Tester Connections Specified Conditions
P 2 - 6, 4 - 5 Below 1
R 1 - 2 Below 1
N 2 - 9, 4 - 5 Below 1
D 2 - 7 Below 1
2 2 - 3 Below 1
L 2 - 8 Below 1
Parking Brake Switch:
Pushed in
Released
C129357E04
1 - Ground part
Parking brake switch
ON
(Switch pin released)
Below 1
1 - Ground part
Parking brake switch
OFF
(Switch pin pushed in)
10 k or higher
BC94
BC
NG
OK
(a) Replace the yaw rate and deceleration sensor (See page
BC-201).
NEXT
(a) Perform the zero point calibration of the yaw rate sensor
and deceleration sensor (See page BC-24).
NEXT
45).
Result
B
A
REPLACE PARK/NEUTRAL POSITION
SWITCH OR PARKING BRAKE SWITCH
6 REPLACE YAW RATE AND DECELERATION SENSOR
7 PERFORM YAW RATE AND DECELERATION SENSOR ZERO POINT CALIBRATION
8 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC95
BC
DESCRIPTION
This DTC is output when the VSC system detects a malfunction in the ABS system. When DTC C1223/43
is stored, there is no malfunction in the skid control ECU.
(b) Check if the same DTC is recorded (See page BC-45).
Result
B
A
DTC C1223/43 ABS Control System Malfunction
C1223/43 ABS control system abnormal ABS control system
1 CHECK DTC
Result Proceed to
DTC output A
DTC not output B
END
REPAIR CIRCUITS INDICATED BY OUTPUT DTCS
BC96
BC
DESCRIPTION
The steering angle sensor signal is sent to the skid control ECU via the CAN communication system.
When there is a malfunction in the communication system, the DTC will be detected by the diagnosis
function.
WIRING DIAGRAM
NOTICE:
HINT:
When U0073/94, U0123/62, U0124/95 or U0126/63 are output together with C1231/31, inspect and
repair the trouble areas indicated by U0073/94, U0123/62, U0124/95 or U0126/63 first.
DTC C1231/31 Steering Angle Sensor Circuit Malfunction
DTC C1290/66 Steering Angle Sensor Zero Point Malfunction
C1231/31
When ECU IG1 terminal voltage 9.5 V or more, steering
angle sensor malfunction signal received.
Steering angle sensor circuit
C1290/66
Steering angle sensor zero point calibration position
significantly differs from recorded value.
Skid Control ECU
IG
BAT
CANH CANH
CANL CANL
ESS
ECU-IG
ECU-B
Short Pin
AM1
ALT
Ignition Switch
Battery
C135281E01
BC97
BC
When the speed sensor or the yaw rate sensor has trouble, DTCs relating to the steering angle sensor
may be output even when the steering angle sensor is normal. When DTCs relating to the speed
sensor (C0200/31, C0205/32, C0210/33, C0215/34, C1235/35, C1236/36, C1238/38, C1239/39) or
yaw rate (deceleration) sensor (C1232/32, C1234/34, C1243/43, C1244/44, C1245/45, C1381/97) are
output together with other DTCs relating to the steering angle sensor, inspect and repair the speed
sensor and yaw rate (deceleration) sensor first, and then inspect and repair the steering angle sensor.
(a) Check for CAN communication system DTCs (See page
CA-14).
Result
B
A
(d) Using a intelligent tester, check for any momentary
interruption in the wire harness and connector
corresponding to a DTC.
DATA LIST: ABS/VSC
OK:
Result
B
C
Result Proceed to
DTC not output A
DTC output B
2 CHECK MOMENTARY INTERRUPTION (STEERING ANGLE SENSOR)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item Measurement Item / Range (Display) Normal Condition
STEERING SEN
Steering angle sensor open detection :
OPN_DET or NORMAL
NORMAL: Normal
Result Proceed to
SYMPTOMS TABLE)
B
NG C
Go to step 4
BC98
BC
A
45).
Result
B
A
(a) Remove the steering wheel and the column lower cover.
(b) Disconnect the steering angle sensor connector.
(c) Turn the ignition switch on.
(d) Measure the voltage.
Standard voltage
NG
OK
(a) Replace the steering angle sensor (See page BC-205).
NEXT
45).
3 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
4 CHECK TERMINAL VOLTAGE (STEERING ANGLE SENSOR)
1 2 3 4 5 6 7 8
9 10111213141516
E16
ESS
BAT
IG
C135282E01
E16-1 (IG) - E16-2 (ESS) 11 to 14 V
E16-9 (BAT) - E16-2 (ESS) 11 to 14 V
CONNECTOR
5 REPLACE STEERING ANGLE SENSOR
6 RECONFIRM DTC
BC99
BC
Result
B
A
Result Proceed to
DTC output A
DTC not output B
END
BC100
BC
DESCRIPTION
If there is a problem with the master cylinder solenoid (skid control ECU) power supply circuit, the skid
control ECU outputs the DTC and prohibits operation under the fail-safe function.
If the voltage supplied to terminal IG1 is not within the DTC detection threshold due to malfunctions in
parts such as the battery and generator circuit, this DTC is stored.
WIRING DIAGRAM
DTC C1241/41 Low Battery Positive Voltage
C1241/41
seconds.
Vehicle speed more than 2 mph (3 km/m).
IG1 terminal voltage less than 9.5 V.
2. All of following conditions continue for at least 0.2
seconds.
Solenoid relay remains ON.
IG1 terminal voltage less than 9.5 V.
Relay contact open.
Battery
Charging system
ECU-IG fuse
Power source circuit
Skid Control ECU
Ignition Switch
ECU-IG
AM1
ALT
IG1
IG2
GND1
GND3
GND2
AM2
IGN
Battery
C135285E01
BC101
BC
NOTICE:
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
NG
OK
(d) Select "DATA LIST" mode on the intelligent tester.
DATA LIST: ABS/VSC
(e) Measure the voltage output from the ECU displayed on
the intelligent tester.
OK:
"Normal" is displayed.
NG
OK
(b) Drive the vehicle at a speed of 2 mph (3 km/h) or more
for 10 seconds or more.
(c) Check if the same DTC is detected (See page BC-45).
Result
B
1 INSPECT BATTERY
CHECK CHARGING SYSTEM
2 READ VALUE OF DATA LIST (IG VOLTAGE)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item Measurement Item : Range (Display) Normal Condition
IG VOLTAGE
ECU power supply voltage : TOO LOW /
NORMAL / TOO HIGH
TOO HIGH: 14 V or more
NORMAL: 9.5 V or 14V
TOO LOW: Below 9.5 V
Go to step 4
3 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC102
BC
A
(a) Remove the ECU-IG fuse from the driver side J/B.
Below 1
NG
OK
(a) Disconnect the skid control ECU connectors.
Standard resistance
NG
4 INSPECT FUSE (ECU-IG)
Driver Side J/B:
ECU-IG
C135286E01
AND REPLACE FUSE
5 CHECK HARNESS AND CONNECTOR (GND TERMINAL CONTINUITY)
Skid Control ECU
A5
GND1 GND2
GND3
A4
C124799E03
CONNECTOR
BC103
BC
OK
BC104
BC
DESCRIPTION
If there is a problem with the master cylinder solenoid (skid control ECU) power supply circuit, the skid
control ECU outputs the DTC and prohibits operation under the fail-safe function.
If the voltage supplied to terminal IG2 is not within the DTC detection threshold due to malfunctions in
parts such as the battery and generator circuit, this DTC is stored.
WIRING DIAGRAM
See page BC-97.
NOTICE:
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
NG
OK
(a) Disconnect the skid control ECU A5 connector.
Standard voltage
NG
OK
DTC C1242/42 IG2 Power Source Circuit
C1242/42
Vehicle speed 2 mph (3 km/h) or more and voltage of
skid control ECU terminal IG2 remains at below 6.5 for
more than 7 seconds.
Battery
Charging system
IGN fuse
Power source circuit
1 CHECK BATTERY VOLTAGE
CHECK CHARGING SYSTEM
2 CHECK SKID CONTROL ECU TERMINAL VOLTAGE (IG2)
Skid Control ECU
A5
GND3 IG2
C139133E01
A5-1 (IG2) - A5-4 (GND3) 11 to 14 V
CONNECTOR
BC105
BC
(a) Remove the IGN fuse from the driver side J/B.
Below 1
NG
OK
(a) Confirm that the skid control ECU connector and speed
sensor connector are properly connected.
(b) Disconnect the skid control ECU connectors.
(c) Inspect both the connector case and the terminal for
deformation and corrosion.
OK:
No deformation or corrosion.
(d) Measure the resistance.
Standard resistance
NG
OK
3 INSPECT FUSE (IGN)
Driver Side J/B:
IGN
C139134E01
AND REPLACE FUSE
4 CHECK HARNESS AND CONNECTOR (GND TERMINAL CONTINUITY)
Skid Control ECU
A5
GND1 GND2
GND3
A4
C124799E03
CONNECTOR
5 RECONFIRM DTC
BC106
BC
(b) Drive the vehicle at a speed of 2 mph (3 km/h) or more
for 7 seconds or more.
(c) Check if the same DTC is output (See page BC-45).
B
A
END
BC107
BC
DESCRIPTION
The master cylinder pressure sensor is connected to the skid control ECU in the master cylinder solenoid.
DTC C1246/46 Master Cylinder Pressure Sensor Malfunction
DTC C1281/81
Master Cylinder Pressure Sensor Output Mal-
function (Test Mode DTC)
Skid Control ECU
IG1
VM/C1
(VCM)
PM/C1
(PMC)
STP
GND
VC
VOUT
GND M/C1 GND
From
Stop Light Switch
To Body Ground
From Battery
Master Cylinder Solenoid (Skid Control ECU with Actuator)
VM/C1 (VCM): Master Cylinder Pressure Sensor Power Supply Output
PM/C1 (PMC ): Master Cylinder Pressure Sensor Signal Input
M/C1 GND: Master Cylinder Pressure Sensor Ground
Master Cylinder
Pressure Sensor
C124773E01
BC108
BC
NOTICE:
(d) Select the DATA LIST mode on the intelligent tester.
DATA LIST: ABS/VSC
C1246/46
seconds.
Vehicle speed more than 4 mph (7 km/h).
PM/C1 terminal voltage does not change by more
than 0.005 V once it exceeds 0.86 V.
2. PM/C1 terminal receives noise at least 7 times within
5 seconds.
seconds.
Stop switch OFF.
PM/C1 terminal voltage more than 0.86 V or less
than 0.3 V.
seconds.
IG1 terminal voltage between 9.5 V and 17.0 V.
VM/C1 terminal voltage not within 4.4 V and 5.6 V.
seconds.
VM/C1 terminal voltage between 4.4 V and 5.6 V.
PM/C1 terminal voltage not within 0.14 V and 4.85
V.
sensor)
sensor)
1 READ VALUE OF DATA LIST (MASTER CYLINDER PRESSURE SENSOR)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item
(Display)
MAS CYL PRS 1
1 reading / min.: 0 V, max.: 5 V
When brake pedal released:
0.3 to 0.9 V
When stop lights turned on:
0.3 to 0.9 V
pedal depressed
MAS CYL PRESS 1
When brake pedal released:
0.3 to 0.9 V
When stop lights turned on:
0.3 to 0.9 V
pedal depressed
BC109
BC
(e) Check that the master cylinder pressure value of the
master cylinder pressure sensor displayed on the
intelligent tester changes when the brake pedal is
depressed.
Result
B
C
A
(b) Check if the same DTC is detected (See page BC-45).
Result
B
A
(a) Check the brake pedal height.
(b) Check the stop light switch installation.
OK:
The brake pedal and stop light switch are normal.
NG
OK
Result Proceed to
Master cylinder pressure sensor value normal A
Master cylinder pressure sensor value changes but not normal B
Master cylinder pressure sensor value does not change C
Go to step 3
REPLACE HYDRAULIC BRAKE BOOSTER
2 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
3 CHECK BRAKE PEDAL HEIGHT
ADJUST BRAKE PEDAL HEIGHT
BC110
BC
Standard voltage
NG
OK
Result
B
A
4 INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (STP TERMINAL)
Skid Control ECU
STP
A4
C121700E51
A4-7 (STP) - Body
ground
Stop light switch ON
(Brake pedal
depressed)
8 to 14 V
A4-7 (STP) - Body
ground
Stop light switch OFF
(Brake pedal released)
Below 1.5 V
CONNECTOR
5 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC111
BC
DESCRIPTION
The 4WD control ECU stimulates the actuator to lock the rear differential in accordance with the rear
differential lock switch. The skid control ECU monitors the transfer indicator switch (rear differential lock)
and if the rear differential is locked, at which time the rear differential lock indicator light is illuminated,
prohibits ABS, TRAC and VSC controls. At the same time, the skid control ECU illuminates the ABS
warning light, VSC OFF indicator light and SLIP indicator light.
WIRING DIAGRAM
NOTICE:
DTC C1248/48 Open Circuit in Rear Differential Lock
C1248/48
At vehicle speed of 31 mph (50 km/h) or more, 3
seconds or more elapse after rear differential changes
from free to lock.
Rear differential lock indicator switch
Rear differential lock indicator switch circuit
Skid Control ECU
Indicator Switch
EXI3
Combination Meter
Ignition Switch
GAUGE
AM2
Battery
C135287E01
BC112
BC
Standard voltage
NG
OK
(b) Drive the vehicle at 31 mph (50 km/h) or more for 3
seconds or more with the rear differential free.
Result
B
A
1 INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (EXI3)
Skid Control ECU
EXI3
A4
C121700E52
Tester Connection Vehicle Condition
Rear Differential Lock Indicator
Light
Specified Condition
A4-26 (EXI3) - Body ground Rear Differential free OFF 8 to 14 V
A4-26 (EXI3) - Body ground Rear Differential locked ON 1.5 V
Go to step 3
2 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC113
BC
(a) Disconnect the rear differential lock indicator switch
connector.
(b) Remove the rear differential lock indicator switch.
Standard resistance
NG
OK
(b) Disconnect the rear differential lock indicator switch
connector.
Standard resistance
NG
OK
3 INSPECT REAR DIFFERENTIAL LOCK INDICATOR SWITCH
Indicator Switch:
1
2
F052057E05
D2-1 - D2-2 Pushed Below 1
D2-1 - D2-2 Free 10 k or higher
REPLACE REAR DIFFERENTIAL LOCK
INDICATOR SWITCH
4
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - REAR DIFFERENTIAL
LOCK INDICATOR SWITCH)
Skid Control ECU
Rear Differential Lock Indicator Switch
A4
D2
EXI3
C138458E01
A4-26 (EXI3) - D2-2 Below 1
D2-1 - Body ground 10 k or higher
CONNECTOR
BC114
BC
DESCRIPTION
The skid control ECU inputs the stop light switch signal and detects the status of the brake operation.
WIRING DIAGRAM
NOTICE:
DTC C1249/49 Open in Stop Light Switch Circuit
C1249/49
When ECU terminal IG1 voltage 9.5 V to 17.0 V and
ABS non-operational, open in stop light switch circuit
continues for 0.3 seconds or more.
Stop light switch assembly
Skid Control ECU
Stop Light Switch
STOP LP CTRL
Ignition Switch
to Stop Light
ALT
AM1
IG1
STOP
Battery
STP2
STPO
STP
C139127E01
BC115
BC
(a) Check that the stop lights come on when the brake pedal
is depressed and go off when the brake pedal is
released.
OK
HINT:
Check the stop light bulbs as they may have burnt out.
NG
OK
Standard voltage
Result
B
C
A
1 CHECK STOP LIGHT SWITCH OPERATION
Pedal condition Illumination Condition
Brake pedal depressed ON
Brake pedal released OFF
Go to step 4
2 INSPECT SKID CONTROL ECU (STP TERMINAL VOLTAGE)
Skid Control ECU
STP
A4
C121700E53
A4-7 (STP) - Body
ground
Stop light switch ON
(Brake pedal
depressed)
8 to 14 V
A4-7 (STP) - Body
ground
Stop light switch OFF
(Brake pedal released)
Below 1.5 V
Result Proceed to
SYMPTOMS TABLE)
B
NG C
CONNECTOR
BC116
BC
Result
B
A
(a) Disconnect the stop light switch connector.
Standard resistance
NG
OK
3 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
4 INSPECT STOP LIGHT SWITCH ASSEMBLY
Stop Light Switch:
Pushed in Released
4
3
2 1
I038520E05
1 - 2 Switch pin released Below 1
3 - 4 Switch pin released 10 k or higher
1 - 2 Switch pin pushed in 10 k or higher
3 - 4 Switch pin pushed in Below 1
REPLACE STOP LIGHT SWITCH ASSEMBLY
BC117
BC
(b) Disconnect the stop light switch connector.
Standard resistance
NG
OK
Result
B
A
5 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - STOP LIGHT SWITCH)

Skid Control ECU
A4
Stop Light Switch
A3
STP2
C121702E06
A4-45 (STP2) - A3-1 Below 1
CONNECTOR
6 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC118
BC
DESCRIPTION
The motor relay (semiconductor relay) is built into the master cylinder solenoid and drives the pump motor
based on a signal from the skid control ECU.
NOTICE:
HINT:
Remove the hydraulic brake booster before the inspection (See page BR-28).
(a) Using a screwdriver, remove the 2 plugs from the
hydraulic brake booster (See page BR-32).
(b) Check the tightening torque of 2 screws which fasten the
wire harness connecting the hydraulic brake booster and
brake booster pump (See page BR-36).
NG
OK
(a) Using a screwdriver, remove the 2 screws and pull the
wire harness from the hydraulic brake booster.
(b) Measure the resistance between the red wire (MT+) and
black wire (MT-).
Below 2
NG
OK
(a) Reassemble the hydraulic brake booster, then reinstall
the hydraulic brake booster.
(b) Clear the DTC (See page BC-45).
DTC C1251/51 Open in Pump Motor Circuit
C1251/51 Open in motor system circuit (motor input circuit)
Brake booster pump assembly
1 CHECK BRAKE PUMP MOTOR WIRE HARNESS CONNECTION (MT+ / MT-)
RETIGHTEN SCREWS
2 CHECK RESISTANCE OF PUMP MOTOR WIRE HARNESS (MT+/MT-)
Black Wire
Red Wire
F052356E02
REPLACE BRAKE BOOSTER PUMP
ASSEMBLY
3 RECONFIRM DTC
BC119
BC
Result
B
A
Result Proceed to
DTC output A
DTC not output B
END
BC120
BC
DESCRIPTION
NOTICE:
HINT:
When C1253/53, C1254/54 or C1256/56 is output together with C1252/52, inspect and repair the trouble
areas indicated by C1253/53, C1254/54 or C1256/56 first.
(b) Depress the brake pedal more than 20 times.
(d) Check how the hydraulic brake booster pump motor
operates.
Result
B
C
D
A
(a) Using a screwdriver, remove the 2 plugs from the
hydraulic brake booster (See page BR-32).
(b) Check the tightening torque of 2 screws which fasten the
wire harness connecting the hydraulic brake booster and
brake booster pump (See page BR-36).
DTC C1252/52
Brake Booster Pump Motor on Time Abnor-
mally Long
C1252/52 Motor operates for 3 minutes or more.
Hydraulic brake booster (accumulator pressure
sensor)
1 CHECK HYDRAULIC BRAKE BOOSTER PUMP MOTOR OPERATION
Result Proceed to
Pump motor does not operate A
Pump motor operates continuously (Does not stop) B
Pump motor operates intermittently C
Pump motor operates, then stops D
ASSEMBLY
Go to step 4
Go to step 5
2 CHECK BRAKE PUMP MOTOR WIRE HARNESS CONNECTION (MT+ / MT-)
BC121
BC
NG
OK
(a) Using a screwdriver, remove the 2 screws and pull the
wire harness from the hydraulic brake booster assembly.
(b) Measure the resistance between the red wire (MT+) and
black wire (MT-).
Below 2
NG
OK
(d) Select the DATA LIST mode on the intelligent tester.
DATA LIST: ABS/VSC
(e) Check that the accumulator pressure sensor output is
normal.
Result
B
C
RETIGHTEN SCREWS
3 CHECK RESISTANCE OF PUMP MOTOR WIRE HARNESS (MT+/MT-)
Black Wire
Red Wire
F052356E02
ASSEMBLY
4 READ VALUE OF DATA LIST (ACCUMULATOR PRESSURE SENSOR)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item
(Display)
ACC PRESS SENS
reading / min.: 0 V, max.: 5 V
3.58 to 5 V
suspected.
Result Proceed to
Output value varies within "Normal Condition" range A
Output value does not reach "Normal Condition" range B
Output value constant regardless of pump motor operation C
ASSEMBLY
BC122
BC
A
(b) Turn the ignition switch off.
(d) Wait for more than 5 minutes.
(e) Check if the same DTC is recorded (See page BC-45).
Result
B
A
5 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
ASSEMBLY
BC123
BC
DESCRIPTION
WIRING DIAGRAM
NOTICE:
When replacing the hydraulic brake booster, perform zero point calibration (See page BC-24).
DTC C1253/53 Hydro Booster Pump Motor Relay Malfunction
C1253/53 Open in motor system circuit (motor input circuit)
ABS MTR fuse
+BM terminal circuit
Hydraulic brake booster
Skid Control ECU
ABS MTR
GND1
GND2
GND3
+BM1
+BM2
Battery
C139130E01
BC124
BC
(a) Connect a intelligent tester to the DLC3.
(d) Select the "ABS MOT RELAY" in the ACTIVE TEST and
operate the actuator motor using the intelligent tester.
MOBD / select vehicle / ABS/VSC / ACTIVE TEST.
ACTIVE TEST: ABS/VSC
(e) Check for operation sound of the actuator motor when it
is operated with the intelligent tester.
OK:
The operation sound of the actuator motor can be
heard.
NG
OK
(b) Turn the ignition switch off
(c) Depress the brake pedal more than 20 times.
(d) Turn the ignition switch on.
(e) Wait until the pump motor stops.
(f) Depress the brake pedal several times until the pump
motor is turned on.
(g) Wait until the pump stops.
(h) Repeat (f) and (g) three times.
(i) Check if the same DTC is recorded (See page BC-45).
Result
B
A
1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER (ABS MOTOR RELAY)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item Vehicle Condition / Test Details Diagnostic Note
ABS MOT RELAY Turns ABS motor relay ON or OFF Operation of motor can be heard
Go to step 3
2 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC125
BC
(a) Remove the ABS MTR fuse from the engine room R/B
No. 2.
Below 1
NG
OK
Standard voltage
NG
OK
3 INSPECT FUSE (ABS MTR)
Engine Room R/B No. 2:
ABS MTR fuse
C139129E01
AND REPLACE FUSE
4 INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (+BM, +BM2 TERMINAL)
Skid Control ECU
A4
A5
+BM1
+BM2
C124799E11
A4-2 (+BM1) - Body ground 11 to 14 V
A5-2 (+BM2) - Body ground 11 to 14 V
CONNECTOR (+BM1 AND +BM2 CIRCUIT)
BC126
BC
Standard resistance
NG
OK
(f) Depress the brake pedal several times until the pump
motor is turned on.
(g) Wait until the pump stops.
(h) Repeat (f) and (g) three times.
(i) Check if the same DTC is recorded (See page BC-45).
Result
B
A
5 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BODY GROUND)
Skid Control ECU
A5
GND1 GND2
GND3
A4
C124799E03
CONNECTOR (GND CIRCUIT)
6 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC127
BC
DESCRIPTION
The accumulator pressure sensor is connected to the skid control ECU in the master cylinder solenoid.
DTC C1254/54 Pressure Switch Circuit
C1254/54
Accumulator pressure sensor fault
(Fluid pressure does not change when it should e.g.
pump operates, brake pedal depressed/released).
sensor)
sensor)
VACC: Accumulator Pressure Sensor Power Supply Output
PACC: Accumulator Pressure Sensor Signal Input
ACCGND: Accumulator Pressure Sensor Ground
IG1
GND
VACC
PACC
ACCGND
VACC
PACC
ACCGND
Skid Control ECU
Accumulator
Pressure Sensor
C124776E01
BC128
BC
(e) Select the DATA LIST mode on the intelligent tester.
DATA LIST: ABS/VSC
(f) Confirm whether the accumulator output voltage is
normal.
Result
B
A
(b) Depress the brake pedal more than 20 times.
(c) Install a brake pedal effort gauge (SST), and bleed air.
(d) Connect the intelligent tester to the DLC3.
(e) Turn the ignition switch on.
(f) Select the DATA LIST mode on the intelligent tester.
DATA LIST: ABS/VSC
(g) Check that the master cylinder output value is in the
Normal Condition range.
OK:
Master cylinder pressure sensor value is in the
Normal Condition.
NG
1 READ VALUE OF DATA LIST (ACCUMULATOR PRESSURE SENSOR)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item Measurement Item / Range (Display) Normal Condition
ACC PRESS SENS
Accumulator pressure sensor reading / min.: 0
V, max.: 5 V
3.58 to 5 V
Result Proceed to
Output value normal A
Output value not normal B
Item
(Display)
MAS CYL PRS 1
0.3 to 1.9 V
With pedal pressure of 49 N (5
kgf, 11 lbf)
Front brake pressure: 770 to
1280 kpa (7.9 to 13.1 kgf/cm2,
112 to 186 psi)
BC129
BC
OK
(f) Depress the brake pedal and release it.
(g) Wait for 25 minutes.
(h) Check if the same DTC is recorded (See page BC-45).
Result
B
A
3 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC130
BC
DESCRIPTION
The accumulator pressure sensor is connected to the skid control ECU in the master cylinder solenoid.
NOTICE:
DTC C1256/56 Accumulator Low Pressure
C1256/56
Fluid pressure inside the accumulator drops below the
specification value.
Hydraulic circuit
sensor)
VACC: Accumulator Pressure Sensor Power Supply Output
PACC: Accumulator Pressure Sensor Signal Input
ACCGND: Accumulator Pressure Sensor Ground
IG1
GND
VACC
PACC
ACCGND
VACC
PACC
ACCGND
Skid Control ECU
Accumulator
Pressure Sensor
C124776E01
BC131
BC
(e) Wait for 99 seconds.
(f) Check if the same DTC is recorded (See page BC-45).
Result
B
A
(a) Perform hydraulic brake booster on-vehicle inspection
(See page BR-19).
OK:
Hydraulic circuit is normal (No leakage).
NG
OK
(d) Select the "DATA LIST" mode on the intelligent tester.
DATA LIST: ABS/VSC
(e) Check that the accumulator's output value is in the
Normal Condition range.
1 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
2 CHECK HYDRAULIC CIRCUIT
REPAIR HYDRAULIC CIRCUIT
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item
(Display)
ACC PRESS SENS
reading / min.: 0 V, max.: 5 V
3.58 to 5 V
suspected.
BC132
BC
OK:
Accumulator pressure sensor value is in the
Normal Condition.
NG
OK
Result
B
A
4 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC133
BC
DESCRIPTION
The motor relay (semiconductor relay) is built into the hydraulic brake booster and drives the pump motor
NOTICE:
(b) Disconnect the skid control ECU connector (A4).
(d) Check the hydraulic brake booster pump motor
operation.
OK:
Hydraulic brake booster pump operates.
NG
OK
(b) Reconnect the skid control ECU connector (A4).
(d) Clear the DTC (See page BC-45).
(e) Check if the same DTC is recorded (See page BC-45).
Result
B
A
DTC C1257/57 IG Power Source
C1257/57 Open in pump motor input circuit
1 CHECK HYDRAULIC BRAKE BOOSTER PUMP MOTOR OPERATION
ASSEMBLY
2 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC134
BC
DESCRIPTION
This circuit monitors whether the transfer is in 2WD or 4WD mode and inputs the signal to the skid control
ECU.
In 2WD mode, TRAC is activated.
In 4WD mode, A-TRAC is activated.
WIRING DIAGRAM
DTC C1258/58 Transfer 4WD Position Switch Circuit
DTC C1282/82
Center Differential Lock Position Switch Mal-
function (Test Mode DTC)
C1258/58
4WD
Open in 4WD detecting circuit
2WD
Terminal NEO ground short, or abnormal signals
transmitted to terminal EXI
T)
position) (M/T)
T)
position) (M/T)
Skid Control ECU Four Wheel Drive Control ECU
Transfer Indicator Switch
(for 4WD position)
EXI ADD
4WD
for A/T:
NEO
C138462E01
BC135
BC
NOTICE:
(a) Confirm the vehicle drive train.
Result
B
A
(c) A/T:
(1) Move the transfer high and low shift lever to the H2,
H4, and L4 ranges, and measure the voltages in
each range.
Standard voltage
(d) M/T:
(1) Move the transfer high and low shift lever to the H,
HL, and LL ranges, and measure the voltages in
each range.
1 CONFIRM VEHICLE TYPE
for M/T:
Skid Control ECU
(for Center Differential Lock Position)
EXI
NEO
C138461E01
Result Proceed to
4WD A
2WD B
Go to step 3
2 INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (EXI)
Skid Control ECU
EXI
A4
C121700E55
Tester Connection Transfer Range Specified Condition
A4-27 (EXI) - Body
ground
H2 8 to 14 V
A4-27 (EXI) - Body
ground
H4, L4 Below 1.5 V
BC136
BC
Standard voltage
Result
B
C
A
Standard resistance
NG
OK
Result
B
Tester Connection Transfer Range Specified Condition
A4-27 (EXI) - Body
ground
H 8 to 14 V
A4-27 (EXI) - Body
ground
HL, LL Below 1.5 V
Result Proceed to
OK A
NG (A/T) B
NG (M/T) C
Go to step 5
Go to step 10
3 CHECK HARNESS AND CONNECTOR (NEO TERMINAL - BODY GROUND)
Skid Control ECU
NEO
A4
C121700E56
Tester Connection Vehicle Drive Train Specified Condition
A4-10 (NEO) - Body
ground
2WD 10 k or higher
A4-10 (NEO) - Body
ground
4WD Below 1
CONNECTOR
4 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC137
BC
A
(a) Disconnect the transfer indicator switch (4WD position)
connector.
(b) Remove the transfer indicator switch (4WD position).
Standard resistance
NG
OK
(a) Disconnect the four wheel drive control ECU connector.
(b) Disconnect the transfer indicator switch (for 4WD
position) connector.
Standard resistance
NG
OK
5 INSPECT TRANSFER INDICATOR SWITCH (for 4WD position)
G034535
Tester Connection Switch Position Specified Condition
1 - 2 Pushed Below 1
1 - 2 Released 10 k or higher
REPLACE TRANSFER INDICATOR SWITCH
(for 4WD POSITION)
6
CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU -
TRANSFER INDICATOR SWITCH)
1 2 3 4
5 6 7 8 9 10
1 2
Four Wheel Drive Control ECU
(for 4WD position)
B4
4WD
B39
C138463E01
B4-6 (4WD) - B39-2 Below 1
B4-6 (4WD) - Body ground 10 k or higher
CONNECTOR
BC138
BC
(b) Disconnect the 4WD control ECU connector.
Standard resistance
NG
OK
(a) Replace the four wheel drive control ECU.
NEXT
Result
B
A
7
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - FOUR WHEEL DRIVE
CONTROL ECU)
1 2 3 4
5 6 7 8 9 10
Skid Control ECU
A4
B4
ADD
EXI
C138464E01
A4-27 (EXI) - B4-8 (ADD) Below 1
A4-27 (EXI) - Body ground 10 k or higher
CONNECTOR
8 REPLACE FOUR WHEEL DRIVE CONTROL ECU
9 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC139
BC
(a) Disconnect the transfer indicator switch (center
differential lock position) connector.
(b) Remove the transfer indicator switch (center differential
lock position).
Standard resistance
NG
OK
(b) Disconnect the transfer indicator switch (center
differential lock position) connector.
Standard resistance
NG
OK
10
INSPECT TRANSFER INDICATOR SWITCH (for CENTER DIFFERENTIAL LOCK
POSITION)
G034535
(for CENTER DIFFERENTIAL LOCK
POSITION)
11
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRANSFER INDICATOR
SWITCH)
1 2
Skid Control ECU
(for center differential lock position)
EXI
A4
B43
C138465E01
A4-27 (EXI) - B43-2 Below 1
A4-27 (EXI) - Body ground 10 k or higher
CONNECTOR
12 RECONFIRM DTC
BC140
BC
Result
B
A
Result Proceed to
DTC output A
DTC not output B
END
BC141
BC
DESCRIPTION
A-TRAC is activated if wheel skid is detected while the transfer is in the L4 position.
WIRING DIAGRAM
NOTICE:
DTC C1268/68 Transfer "L4" Position Switch Circuit
DTC C1283/83
L4 Position Switch Malfunction (Test Mode
DTC)
C1268/68
L4 switch signal input to skid control ECU does not
match L4 switch signal output from ECM.
Skid Control ECU
ECM
(L4 position)
EXI4
L4
C138460E01
BC142
BC
Standard voltage
NG
OK
(a) Check if the test mode DTC (C1283/83) is detected.
Result
B
A
Result
B
A
1 INSPECT SKID CONTROL ECU (EXI4 TERMINAL VOLTAGE)
Skid Control ECU
EXI4
A4
C121700E54
Tester Connection Transfer Condition Specified Condition
A4-21 (EXI4) - Body
ground
L4 Below 1.5 V
A4-21 (EXI4) - Body
ground
Other than above 8 to 14 V
Go to step 4
2 PERFORM TEST MODE INSPECTION (SIGNAL CHECK)
Result Proceed to
Test mode DTC (C1283/83) not output A
Test mode DTC (C1283/83) output B
REPAIR TRANSFER INDICATOR SWITCH
CIRCUIT (L4 POSITION)
3 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC143
BC
(a) Disconnect the transfer indicator switch (L4 position)
connector.
(b) Remove the transfer indicator switch (L4 position).
Standard resistance
NG
OK
(b) Disconnect the transfer indicator switch (L4 position)
connector.
Standard resistance
NG
OK
4 INSPECT TRANSFER INDICATOR SWITCH (L4 POSITION)
G034535
1 - 2 Free 10 k or higher
5
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - TRANSFER INDICATOR
SWITCH (L4 POSITION))
1 2
Skid Control ECU
(for L4 position)
(harness side connector)
A4
B40
EXI4
C138459E01
A4-21 (EXI4) - B40-1 Below 1
A4-21 (EXI4) - Body ground 10 k or higher
CONNECTOR
BC144
BC
(b) Disconnect the ECM connector.
Standard resistance
NG
OK
6 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - ECM)
Skid Control ECU
A4
EXI4
B3
ECM:
L4
F052060E02
A4-21 (EXI4) - B3-13 (L4) Below 1
A4-21 (EXI4) - Body ground 10 k or higher
B3-13 (L4) - Body ground 10 k or higher
CONNECTOR
BC145
BC
DESCRIPTION
The skid control ECU measures the speed of each wheel by receiving signals from the speed sensors.
These signals are used for recognizing whether all 4 wheels are operating properly. Therefore, all wheel
signals must be equal.
NOTICE:
(a) Check if the DTC(s) relating to the speed sensor circuit is
output (See page BC-45).
Result
B
A
(a) Check tire size and condition of all 4 wheels.
OK:
All 4 wheels are the same size and in the same
condition.
NG
OK
(b) Drive the vehicle at more than 13 mph (20 km/h) for
more than 60 seconds.
Result
DTC C1337/37 Different Diameter Tire Malfunction
C1337/37
Diameters different of 2 front wheels and 2 rear
wheels.
Wheel speed sensor fault
Speed sensor circuit
Tire sizes
1 CHECK DTC
Result Proceed to
DTC not output A
DTC output B
REPAIR SPEED SENSOR CIRCUIT
2 CHECK TIRE SIZE
REPLACE TIRES SO THAT ALL 4 TIRES ARE
SAME IN SIZE
3 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
BC146
BC
B
A
END
BC147
BC
DESCRIPTION
The skid control ECU inputs the stop light switch signal and detects the status of the brake operation.
WIRING DIAGRAM
See page BC-111.
NOTICE:
(a) Check that the stop lights come on when the brake pedal
is depressed and go off when the brake pedal is
released.
OK
HINT:
Check the stop light bulbs as they may have burnt out.
NG
OK
DTC C1380/64 Stop Light Control Relay Malfunction
C1380/64
Either of following conditions met when IG1 terminal
voltage between 10 V and 14 V:
Despite STPO (stop light driving output) being on,
no signal input to STP terminal for 5 seconds or
more
Despite STPO being off, input signals of STP and
STP2 do not match
Stop light switch assembly
STOP LP CTRL relay
1 CHECK STOP LIGHT SWITCH OPERATION
Pedal Condition Illumination Condition
Brake pedal depressed ON
Brake pedal released OFF
CHECK STOP LIGHT SWITCH CIRCUIT
BC148
BC
Standard voltage
NG
OK
Standard resistance
NG
OK
2 INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (STP)
Skid Control ECU
STP
A4
C121700E58
Tester Connection Switch condition Specified Condition
A4-7 (STP) - Body
ground
Brake pedal depressed 8 to 14 V
A4-7 (STP) - Body
ground
Brake pedal released Below 1.5 V
CONNECTOR (STP CIRCUIT)
3 INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (STP2)
Skid Control ECU
STP
A4
STP2
C121700E57
A4-7 (STP) - A4-45 (STP2) Below 1
CONNECTOR (STP2 CIRCUIT)
BC149
BC
(d) Select the ACTIVE TEST mode on the intelligent tester.
(e) Check that the stop lights turn on and off on the rear
combination light when using the intelligent tester.
OK:
The stop lights turn on and off according to the
intelligent tester operations.
NG
OK
Result
B
A
4 PERFORM ACTIVE TEST USING INTELLIGENT TESTER (STOP LIGHT RELAY)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item Vehicle Condition / Test Details Diagnostic Note
STP LIGHT RELAY Turns stop light relay ON / OFF Observe stop lights
Go to step 6
5 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC150
BC
(a) Disconnect the STOP LP CTRL relay.
Standard voltage
NG
OK
(a) Remove the STOP LP CTRL relay from the engine room
R/B No. 2.
Standard resistance
Standard resistance
NG
OK
6 CHECK STOP LP CTRL RELAY
STOP LP CTRL relay terminal
F052358E01
Terminal 5 - Body
ground
Always 8 to 14 V
Terminal 1 - Body
ground
Always 8 to 14 V
CONNECTOR
7 INSPECT STOP CTRL LP RELAY
F052359E01
3 - 4 Below 1
3 - 5 10 k or higher
3 - 4
Battery voltage applied
between terminals 1 (+)
and 2 (-)
10 k or higher
3 - 5
Battery voltage applied
between terminals 1 (+)
and 2 (-)
Below 1
REPLACE STOP LP CTRL RELAY
BC151
BC
Standard voltage
NG
OK
Result
B
A
8 INSPECT SKID CONTROL ECU TERMINAL VOLTAGE (STPO)
Skid Control ECU
STPO
A4
C121700E59
A4-16 (STPO) - Body
ground
Brake pedal depressed 11 to 14 V
CONNECTOR (STPO CIRCUIT)
9 RECONFIRM DTC
Result Proceed to
DTC output A
DTC not output B
END
BC152
BC
DESCRIPTION
(b) Check if the same DTC(s) is output (See page BC-45).
DTC U0073/94 Control Module Communication Bus OFF
DTC U0100/65 Lost Communication with ECM / PCM
DTC U0123/62
Lost Communication with Yaw Rate Sensor
Module
DTC U0124/95
Lost Communication with Lateral Acceleration
Sensor Module
DTC U0126/63
Lost Communication with Steering Angle Sen-
sor Module
DTC No. DTC Detecting Conditions Trouble Area
U0073/94
When either of following conditions (1 or 2) detected:
1. After data output from skid control ECU completed,
output continues for 5 seconds or more.
2. Bus off condition occurs once or more per 0.1
seconds 10 times in succession.
U100/65
When IG1 terminal voltage 10 V or more and vehicle
speed 9 mph (15 km/h) or more, either of following
conditions (1 or 2) occurs 10 times in succession:
1. Data cannot be sent to ECM once or more within 5
seconds.
2. Data from ECM cannot be received once or more
within 5 seconds.
U0123/62
When IG1 terminal voltage 10 V or more, either of
following conditions (1 or 2) detected:
1. Data from yaw rate sensor cannot be received for 1
second or more.
2. Data from yaw rate sensor cannot be received once
or more within 5 seconds.
U0124/95
When IG1 terminal voltage 9.5 V or more, either of
1. Data from deceleration sensor cannot be received
for 1 second or more.
2. Data from deceleration sensor cannot be received
once or more within 5 seconds.
U0123/63
When IG1 terminal voltage 10 V or more, either of
1. Data from steering angle sensor cannot be
received for 1 second or more.
2. Data from steering angle sensor cannot be
received once or more within 5 seconds.
1 RECONFIRM DTC
BC153
BC
Result
B
A
Result Proceed to
DTC output A
DTC not output B
END
BC154
BC
DESCRIPTION
If any of the following is detected, the ABS warning light remains ON.
1. The skid control ECU connectors are disconnected from the skid control ECU.
2. There is a malfunction in the skid control ECU internal circuit.
3. There is an open in the harness between the combination meter and skid control ECU.
WIRING DIAGRAM
NOTICE:
(a) Check if DTCs for ABS are recorded (See page BC-45).
ABS Warning Light Remains ON
1 CHECK DTC
Combination Meter Skid Control ECU
WA
ABS
GAUGE
Ignition Switch
AM2
Battery
C135292E01
BC155
BC
Result
B
A
(a) Check that the ECU connector is securely connected.
OK:
The connector is securely connected.
NG
OK
(b) Disconnect the combination meter connector.
Standard resistance
(d) Measure the resistance.
Standard resistance
NG
OK
(a) Check the combination meter system (See page ME-15).
OK:
Combination meter is normal.
Result Proceed to
DTC not output A
DTC output B
DTCS
2 INSPECT SKID CONTROL ECU CONNECTOR
CONNECT CONNECTOR CORRECTLY
3 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - COMBINATION METER)
1 2 8 4 6 6 J 8 9 1O 11 12 18 14 16 16
1J 18 19 2O 21 22 28 24 26 26 2J 28 29 8O 81 82
Skid Control ECU
Combination Meter
A4
E13
ESC
WA
C135293E01
A4-29 (WA) - E13-17 (ESC) Below 1
A4-29 (WA) - Body ground 10 k or higher
CONNECTOR
4 INSPECT COMBINATION METER ASSEMBLY
BC156
BC
NG
OK
REPLACE COMBINATION METER
ASSEMBLY
BC157
BC
DESCRIPTION
If the ECU detects trouble, it illuminates the ABS warning light while at the same time prohibiting ABS
control.
At this time, the ECU records a DTC in its memory.
Connecting terminals TC and CG of the DLC3 causes the ECU to display 2-digit DTCs by blinking the
ABS warning light.
WIRING DIAGRAM
See page BC-151.
NOTICE:
(c) Check that the ABS warning light comes on.
OK:
ABS warning light comes on.
OK
NG
Standard resistance
NG
ABS Warning Light does not Come ON
1 CHECK ABS WARNING LIGHT
1 2 8 4 6 6 J 8 9 1O 11 12 18 14 16 16
1J 18 19 2O 21 22 28 24 26 26 2J 28 29 8O 81 82
Skid Control ECU
Combination Meter
A4
E13
ESC
WA
C135293E01
A4-29 (WA) - E13-17 (ESC) Below 1
A4-29 (WA) - Body ground 10 k or higher
CONNECTOR
BC158
BC
OK
(a) Check the combination meter system (See page BC-36).
OK:
NG
OK
ASSEMBLY
CHECK FOR INTERMITTENT PROBLEMS
BC159
BC
DESCRIPTION
When the skid control ECU stores DTCs, the VSC and TRAC functions are deactivated and the VSC
TRAC warning light comes on in the combination meter.
WIRING DIAGRAM
NOTICE:
(a) Check if DTCs for VSC are recorded (See page BC-45).
Result
VSC TRAC Warning Light Remains ON
1 CHECK DTC
Combination Meter
Skid Control ECU
Ignition Switch
Battery
AM2
GAUGE
VSC TRAC
VSCW
C135296E01
Result Proceed to
DTC not output A
DTC output B
BC160
BC
B
A
(a) Check that the ECU connector is securely connected.
OK:
The connector is securely connected.
NG
OK
Standard resistance
NG
OK
OK:
NG
DTCS
2 INSPECT SKID CONTROL ECU CONNECTOR
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
(haness side connector):
Combination Meter
VSCW
A4
E14
VSCW
C135294E01
A4-36 (VSCW) - E14-6 (VSCW) Below 1
A4-36 (VSCW) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC161
BC
OK
BC162
BC
DESCRIPTION
When the ECU stores DTCs, the VSC warning light illuminates on the combination meter.
WIRING DIAGRAM
See page BC-156.
NOTICE:
(a) Connect an intelligent tester to the DLC3.
(d) Select the "VSC WARN LIGHT" in the ACTIVE TEST
and operate the VSC TRAC warning light using the
intelligent tester.
(e) Check that the VSC TRAC warning light turns on and off
in the combination meter using the intelligent tester.
OK:
The VSC TRAC warning light turns ON and OFF in
accordance with the intelligent tester operation.
OK
NG
VSC TRAC Warning Light does not Come ON
1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VSC TRAC WARNING LIGHT)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item (Display) Test Details Diagnostic Note
VSC WARN LIGHT Turns VSC TRAC warning light ON and OFF Observe combination meter
BC163
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
VSCW
A4
E14
VSCW
C135294E01
A4-36 (VSCW) - E14-6 (VSCW) Below 1
A4-36 (VSCW) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC164
BC
DESCRIPTION
The BRAKE warning light lights up when the brake fluid is insufficient, the parking brake is applied or the
EBD is defective.
WIRING DIAGRAM
NOTICE:
(a) Check for the DTCs (See page BC-45).
Result
Brake Warning Light Remains ON
1 CHECK DTC
Skid Control ECU
Combination Meter
Brake Fluid Level
Warning Switch
Battery
Ignition Switch
GAUGE
AM2
BRAKE
BRL
PKB
LBL
C135295E01
Result Proceed to
DTC not output A
DTC output B
BC165
BC
B
A
(a) Check the amount of brake fluid in the brake reservoir.
OK:
Brake fluid level is correct.
NG
OK
(a) Check whether the skid control ECU connector is
connected securely.
OK:
The skid control ECU connector is connected
securely.
NG
OK
(a) Disconnect the brake fluid level warning switch
connector.
Standard resistance
HINT:
If the result is as specified, adjust the brake fluid level to the
MAX level after measuring the resistance.
NG
OK
DTCS
2 CHECK BRAKE FLUID LEVEL
ADD BRAKE FLUID
3 CHECK SKID CONTROL ECU CONNECTOR
4 INSPECT BRAKE FLUID LEVEL WARNING SWITCH
Brake Fluid Level
Warning Switch:
F052341E05
1 - 2 Float UP 1.9 k to 2.1 k
1 - 2 Float DOWN Below 1
REPLACE BRAKE MASTER CYLINDER
RESERVOIR SUB-ASSEMBLY
BC166
BC
(b) Disconnect the brake fluid level warning switch
connector.
Standard resistance
NG
OK
(a) Disconnect the parking brake switch connector.
Standard resistance
NG
OK
5
CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE FLUID LEVEL
WARNING SWITCH)
Skid Control ECU
LBL
A4
A14
F051748E03
A4-41 (LBL) - A14-2 Below 1
A4-41 (LBL)- Body ground 10 k or higher
CONNECTOR
6 INSPECT PARKING BRAKE SWITCH ASSEMBLY
Parking Brake Switch:
Pushed in
Released
C129357E04
Tester Connection Switch Condition Specified Condition
1 - Body ground Released Below 1
1 - Body ground Pushed in 10 k or higher
REPLACE PARKING BRAKE SWITCH
ASSEMBLY
BC167
BC
(a) Disconnect the skid control ECU.
(b) Disconnect the parking brake switch connector.
Standard resistance
NG
OK
Standard resistance
NG
OK
7 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - PARKING BRAKE SWITCH)
1
Skid Control ECU
A4
E22
PKB
C124797E03
A4-28 (PKB) - E22-1 Below 1
A4-28 (PKB) - Body ground 10 k or higher
CONNECTOR
1 2 8 4 6 6 J 8 9 1O 11 12 18 14 16 16
1J 18 19 2O 21 22 28 24 26 26 2J 28 29 8O 81 82
Skid Control ECU
Combination Meter
A5
E13
BRL
PKB
C135297E01
A5-3 (BRL) - E13-31 (PKB) Below 1
A5-3 (BRL) - Body ground 10 k or higher
CONNECTOR
BC168
BC
OK:
NG
OK
ASSEMBLY
BC169
BC
WIRING DIAGRAM
See page BC-161.
NOTICE:
(d) Select the "BRAKE WRN LIGHT" in the ACTIVE TEST
and operate the BRAKE warning light using the
intelligent tester.
Select the following menu items: DIAGNOSTIC / OBD/
(e) Check that the BRAKE warning light turns on and off in
the combination meter using the intelligent tester.
OK:
The BRAKE warning light turns ON and OFF in
OK
NG
Brake Warning Light does not Come ON
1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item (Display) Test Details Diagnostic Note
BRAKE WRN LIGHT Turns BRAKE warning light ON and OFF Observe combination meter
BC170
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12 18 14 16 16
1J 18 19 2O 21 22 28 24 26 26 2J 28 29 8O 81 82
Skid Control ECU
Combination Meter
A5
E13
BRL
PKB
C135297E01
A5-3 (BRL) - E13-31 (PKB) Below 1
A5-3 (BRL) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC171
BC
DESCRIPTION
When the rear differential is locked or during the 4WD mode, VSC control turns off and the VSC OFF
indicator illuminates. Also, the VSC OFF indicator light is ON when the VSC system is in fail-safe control.
WIRING DIAGRAM
NOTICE:
(a) Check if DTCs for VSC are recorded (See page BC-45).
Result
VSC OFF Indicator Light Remains ON
1 CHECK DTC
Skid Control ECU
Combination Meter
Rear Differential Lock Switch
Ignition Switch
GAUGE
VSC OFF
Battery
AM2
WT
EXI3
C138446E03
Result Proceed to
DTC not output A
DTC output B
BC172
BC
B
A
(a) Remove the rear differential lock switch.
(b) Disconnect the rear differential lock switch connector
Standard resistance
NG
OK
(a) Disconnect the four wheel drive control ECU connector.
(b) Disconnect the differential lock switch connector.
Standard resistance
NG
OK
DTCS
2 INSPECT REAR DIFFERENTIAL LOCK SWITCH
Rear Differential Lock Switch:
Push
Release
I044055E02
3 - 4 Pushed in Below 1
REPLACE DIFFERENTIAL LOCK SWITCH
3
CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU -
DIFFERENTIAL LOCK SWITCH)
1 2 3 4 5 6
2 1 3 4
5 6 7 8 9 10
Differential Lock Switch
R
R
L7
E2
C135299E01
L7-4 (R) - E2-4 Below 1
L7-4 (R) - Body ground 10 k or higher
CONNECTOR
BC173
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
WT
TROF
C135294E02
A4-35 (WT) - E14-5 (TROF) Below 1
A4-35 (WT) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC174
BC
DESCRIPTION
See page BC-168.
WIRING DIAGRAM
See page BC-168.
NOTICE:
(d) Select the "VSC/BR OFF IND" in the ACTIVE TEST and
operate the VSC OFF indicator light using the intelligent
tester.
MOBD /select vehicle / ABS/VSC / ACTIVE TEST.
ACTIVE TEST : ABS/VSC
(e) Check that the VSC OFF indicator light turns on and off
in the combination meter using the intelligent tester.
OK:
The VSC OFF indicator light turns ON and OFF in
OK
NG
VSC OFF Indicator Light does not Come ON
1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VSC OFF INDICATOR LIGHT)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item (Display) Test Details Diagnostic Notes
VSC/TRC OFF IND Turns VSC OFF indicator light ON and OFF Observe combination meter
BC175
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
WT
TROF
C135294E02
A4-35 (WT) - E14-5 (TROF) Below 1
A4-35 (WT) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC176
BC
DESCRIPTION
The SLIP indicator blinks when any of the TRAC, VSC and AUTO LSD operate.
When the system fails, the SLIP indicator light illuminates to warn the driver.
WIRING DIAGRAM
NOTICE:
(a) Check for the DTCs (See page BC-45).
Result
Slip Indicator Light Remains ON
1 CHECK DTC
Combination Meter
Skid Control ECU
Ignition Switch
Battery
AM2
GAUGE
SLIP
IND
C135296E02
Result Proceed to
DTC not output A
DTC output B
BC177
BC
B
A
Standard resistance
NG
OK
OK:
NG
OK
DTCS
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
IND
SLIP
C135294E04
A4-34 (IND) - E14-7 (SLIP) Below 1
A4-34 (IND) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC178
BC
WIRING DIAGRAM
See page BC-173
NOTICE:
(d) Select the "SLIP INDI LIGHT" in the ACTIVE TEST and
operate the SLIP indicator light using the intelligent
tester.
MOBD /select vehicle / ABS/ VSC / ACTIVE TEST.
(e) Check that the SLIP indicator light turns on and off in the
combination meter using the intelligent tester.
OK:
The SLIP indicator light turns ON and OFF in
OK
NG
Slip Indicator Light does not Come ON
1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SLIP INDICATOR LIGHT)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item (Display) Test Details Diagnostic Notes
SLIP INDI LIGHT Turns SLIP indicator light ON and OFF Observe combination meter
BC179
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
IND
SLIP
C135294E04
A4-34 (IND) - E14-7 (SLIP) Below 1
A4-34 (IND) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC180
BC
DESCRIPTION
This is the AUTO LSD main switch circuit. When the AUTO LSD switch is pushed on, the AUTO LSD
function is available and the AUTO LSD indicator light illuminates.
HINT:
The AUTO LSD does not operate even if the AUTO LSD switch is pressed under the following conditions:
TRAC or VSC system is faulty.
Temperature inside the hydraulic brake booster increases and the AUTO LSD operation is suspended.
WIRING DIAGRAM
NOTICE:
AUTO LSD Indicator Light Remains ON
Skid Control ECU
Combination Meter
AUTO LSD Switch
Ignition Switch
GAUGE
AUTO LSD
Battery
AM2
INFR
CSW
C138446E01
BC181
BC
(a) Remove the AUTO LSD switch.
(b) Disconnect the AUTO LSD switch connector.
Standard resistance
NG
OK
(b) Disconnect the AUTO LSD connector.
Standard resistance
NG
OK
1 INSPECT AUTO LSD SWITCH
AUTO LSD Switch:
Push
Release
I044055E03
REPLACE AUTO LSD SWITCH
2 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - AUTO LSD SWITCH)
1 2 3 4 5 6
Skid Control ECU
AUTO LSD Switch
A4
E3
CSW
E3-3 E3-4
C138448E01
A4-43 (CSW) - E3-3 Below 1
A4-43 (CSW) - Body ground 10 k or higher
E3-4 - Body ground Below 1
CONNECTOR
BC182
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
INFR
ALSD
C135294E03
A4-15 (INFR) - E14-10 (ALSD) Below 1
A4-15 (INFR) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC183
BC
DESCRIPTION
See page BC-177.
WIRING DIAGRAM
See page BC-177.
NOTICE:
(c) Ground terminal INFR of the skid control ECU.
(d) Check the AUTO LSD indicator light.
OK
OK
NG
AUTO LSD Indicator Light does not Come ON
1 CHECK AUTO LSD INDICATOR LIGHT
Skid Control ECU
INFR
A4
GND1 GND2
C121700E76
INFR - GND Condition Illumination Condition
Connecting ON
Disconnecting OFF
BC184
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
INFR
ALSD
C135294E03
A4-15 (INFR) - E14-10 (ALSD) Below 1
A4-15 (INFR) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC185
BC
DESCRIPTION
This is the A-TRAC main switch circuit. When the A-TRAC switch is pushed on, the A-TRAC function is
available and the A-TRAC indicator light illuminates.
HINT:
The A-TRAC does not operate even if the A-TRAC switch is pressed under the following conditions:
TRAC or VSC system is faulty.
Temperature inside the hydraulic brake booster increases and the A-TRAC operation is suspended.
WIRING DIAGRAM
A-TRAC Indicator Light Remains ON
Skid Control ECU
Combination Meter
A-TRAC Switch
Ignition Switch
GAUGE
A-TRAC
Battery
AM2
HDCS
HDCW
C138446E02
BC186
BC
NOTICE:
(a) Remove the A-TRAC switch.
(b) Disconnect the A-TRAC switch connector.
Standard resistance
NG
OK
(b) Disconnect the A-TRAC connector.
Standard resistance
NG
OK
1 INSPECT A-TRAC SWITCH
Push
Release
A-TRAC Switch:
I044044E05
REPLACE A-TRAC SWITCH
2 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - A-TRACK SWITCH)
Skid Control ECU
A-TRAC Switch
A4
E15
HDCS
C139128E01
A4-44 (HDCS) - E15-4 Below 1
A4-44 (HDCS) - Body ground 10 k or higher
E15-4 - Body ground Below 1
CONNECTOR
BC187
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
HDCW
ATRA
C135294E05
A4-33 (HDCW) - E14-9 Below 1
A4-33 (HDCW) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
BC188
BC
DESCRIPTION
See page BC-182.
WIRING DIAGRAM
See page BC-182.
NOTICE:
(c) Ground terminal HDCW of the skid control ECU.
(d) Check the A-TRAC indicator light.
OK
OK
NG
A-TRAC Indicator Light does not Come ON
1 CHECK A-TRAC INDICATOR LIGHT
Skid Control ECU
HDCW
A4
GND1
GND2
C121700E75
HDCW - GND Condition Illumination Condition
Connecting ON
Disconnecting OFF
BC189
BC
Standard resistance
NG
OK
OK:
NG
OK
1 2 8 4 6 6 J 8 9 1O 11 12
18 14 16 16 1J 18 19 2O 21 22 28 24
Skid Control ECU
Combination Meter
A4
E14
HDCW
ATRA
C135294E05
A4-33 (HDCW) - E14-9 (ATRA) Below 1
A4-33 (HDCW) - Body ground 10 k or higher
CONNECTOR
ASSEMBLY
REPLACE COMBINATION METER ASSEMBLY
BC190
BC
DESCRIPTION
The skid control buzzer sounds intermittently when the temperature of the actuator increases excessively
during TRAC or A-TRAC system operation.
This buzzer sounds continuously when a low pressure malfunction occurs in the accumulator.
WIRING DIAGRAM
NOTICE:
Skid Control Buzzer Circuit
Skid Control ECU
Skid Control Buzzer
Ignition Switch
ECU-IG
ALT
Battery
AM1
BZ BZ IG1
C138447E01
BC191
BC
(c) Select the item "VSC/BR WARN BUZ" in the ACTIVE
TEST and operate the skid control buzzer on the
intelligent tester.
MOBD /select vehicle / ABS/VSC / ACTIVE TEST.
(d) Check that the buzzer sounds/stops when the skid
control buzzer is turned on/off by using the intelligent
tester.
Result
B
A
(a) Disconnect the skid control buzzer connector.
Standard voltage
NG
OK
1 PERFORM ACTIVE TEST USING INTELLIGENT TESTER (SKID CONTROL BUZZER)
Intelligent Tester
DLC3
CAN VIM
H102157E03
Item Vehicle Condition / Test Details Diagnostic note
VSV / BR WARN BUZ Turns skid control buzzer ON and OFF Buzzer can be heard
Result Proceed to
Buzzer does not sound or sounds constantly A
Buzzer sounds/stops B
CHECK FOR INTERMITTENT PROBLEMS
2 INSPECT SKID CONTROL BUZZER (POWER SOURCE CIRCUIT)
A6
Skid Control Buzzer
IG1
I044040E03
A6-2 (IG1) - Body ground 11 to 14 V
CONNECTOR (POWER SOURCE CIRCUIT)
BC192
BC
(a) Disconnect the skid control buzzer connector.
(b) Apply battery voltage to terminals 1 and 2 of the skid
control buzzer connector, and check that the buzzer
sounds.
OK:
The skid control buzzer sound should be heard.
NG
OK
(b) Disconnect the skid control buzzer connector.
Standard resistance
NG
OK
3 INSPECT SKID CONTROL BUZZER ASSEMBLY
Skid Control
Buzzer:
(+) (-)
1
2
F002192E08
REPLACE SKID CONTROL BUZZER
ASSEMBLY
4 CHECK HARNESS AND CONNECTOR (SKID CONTROL BUZZER - SKID CONTROL ECU)
Skid Control ECU
Skid Control Buzzer
BZ
A4
A6
BZ
C124803E02
A4-30 (BZ) - A6-1 (BZ) Below 1
A4-30 (BZ) - Body ground 10 k or higher
CONNECTOR
BC193
BC
DESCRIPTION
Connecting terminals TC and CG of the DLC3 causes the ECU to display 2-digit DTCs by blinking the
ABS and VSC TRAC warning lights.
WIRING DIAGRAM
NOTICE:
When replacing the master cylinder solenoid, perform the zero point calibration (See page BC-24).
Standard voltage
NG
TC and CG Terminal Circuit
1 INSPECT DLC3 TERMINAL VOLTAGE (TC)
Skid Control ECU
ECM
CANH
CANL
DLC3
CG
TC TC
CANH
CANL
C138452E01
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TC
E1
F100115E42
E1-13 (TC) - E1-4 (CG) 11 to 14 V
Go to step 3
BC194
BC
OK
(a) Check whether CAN communication DTC(s) is output
(See page CA-14).
Result
B
A
(a) Measure the resistance.
Standard resistance
NG
OK
Result Proceed to
DTC not output A
DTC output B
DTCS
3 CHECK HARNESS AND CONNECTOR (DLC3 - BODY GROUND)
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
E1
F100115E43
E1-4 (CG) - Body ground Below 1
CONNECTOR
BC195
BC
(a) Disconnect the ECM connector.
Standard resistance
NG
OK
(a) Connect terminals TC and CG of the DLC3.
(c) Check that the MIL is blinking.
OK:
MIL is blinking.
NG
OK
4 CHECK HARNESS AND CONNECTOR (ECM - DLC3)
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
ECM:
DLC3:
E47
E1
TC
TC
C138453E01
E47-23 (TC) - E1-13 (TC) Below 1
E1-13 (TC) - Body ground 10 k or higher
CONNECTOR
5 CHECK ECM (DLC3 INPUT)
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TC
E1
F100115E42
REPLACE ECM
BC196
BC
DESCRIPTION
In sensor check mode, malfunctions of the speed sensor that cannot be detected when the vehicle is
stopped are detected while driving.
Transition to the sensor check mode can be performed by connecting terminals TS and CG of the DLC3
and turning the ignition switch from OFF to ON.
WIRING DIAGRAM
NOTICE:
Standard voltage
OK
NG
TS and CG Terminal Circuit
1 INSPECT DLC3 TERMINAL VOLTAGE (TS)
TS
DLC3
CG
TS
Skid Control ECU
C138449E02
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
TS
E1
F100115E44
E1-12 (TS) - E1-4 (CG) 11 to 14 V
BC197
BC
Standard resistance
NG
OK
(a) Measure the resistance.
Standard resistance
NG
OK
2 CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - DLC3)
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
Skid Control ECU
DLC3:
A4
E1
TS
TS
C138450E02
Tester Connection Specified condition
A4-24 (TS) - E1-12 (TS) Below 1
A4-24 (TS) - Body ground 10 k or higher
CONNECTOR
3 CHECK HARNESS AND CONNECTOR (BODY GROUND - DLC3)
16 15 14 13 12 11 10 9
8 7 6 5 4 3 2 1
DLC3:
CG
E1
F100115E43
Tester Connection Specified condition
E1 (CG) - Body ground Below 1
CONNECTOR
BRAKE CONTROL FRONT SPEED SENSOR
BC195
BC
BRAKE BRAKE CONTROL
FRONT SPEED SENSOR
COMPONENTS
N*m (kgf*cm, ft*lbf) : Specified torque
8.3 (85, 73 in.*lbf)
FRONT SPEED SENSOR
C133067E01
BC196
BC
REMOVAL
1. DISCONNECT CABLE FROM NEGATIVE BATTERY
TERMINAL
2. REMOVE FRONT WHEEL
3. REMOVE FRONT SPEED SENSOR
(b) Using a 5 mm hexagon wrench, remove the bolt and
the front speed sensor.
NOTICE:
Do not attach any foreign matter to the
sensor tip.
Ensure that no foreign matter enters the
sensor installation part.
C133068
BC197
BC
INSPECTION
1. INSPECT FRONT SPEED SENSOR
(a) Check the speed sensor.
If any of the following occurs, replace the speed
sensor with a new one.
The surface of the speed sensor is cracked,
dented or chipped off.
The connector is scratched, cracked or
damaged.
The speed sensor has been dropped.
INSTALLATION
1. INSTALL FRONT SPEED SENSOR
(a) Using a 5 mm hexagon wrench, install the front
speed sensor with the bolt.
NOTICE:
Make sure that the sensor tip is clean.
(b) Connect the skid control sensor wire.
2. INSTALL FRONT WHEEL
Torque: 112 N*m (1,137 kgf*cm, 82 ft.*lbf)
3. CONNECT CABLE TO NEGATIVE BATTERY
TERMINAL
4. CHECK VSC SENSOR SIGNAL
(See page BC-28)
C133068
BRAKE CONTROL REAR SPEED SENSOR
BC197
BC
BRAKE BRAKE CONTROL
REAR SPEED SENSOR
COMPONENTS
REAR SPEED SENSOR
8.3 (85, 73 in.*lbf)
C133070E01
BC198
BC
REMOVAL
TERMINAL
2. REMOVE REAR WHEEL
3. REMOVE REAR SPEED SENSOR
(b) Remove the nut and rear speed sensor.
NOTICE:
Do not attach any foreign matter to the
sensor tip.
Ensure that no foreign matter enters the
sensor installation part.
C133069
BC199
BC
INSPECTION
1. INSPECT REAR SPEED SENSOR
(a) Check the speed sensor.
If any of the following occurs, replace the speed
sensor with a new one.
The surface of the speed sensor is cracked,
dented or chipped off.
The connector is scratched, cracked or
damaged.
The speed sensor has been dropped.
INSTALLATION
1. INSTALL REAR SPEED SENSOR
(a) Install the rear speed sensor with the nut.
NOTICE:
Make sure that the sensor tip is clean.
(b) Connect the skid control sensor wire.
2. INSTALL REAR WHEEL
Torque: 112 N*m (1,137 kgf*cm, 82 ft.*lbf)
TERMINAL
(See page BC-28)
C133069
BRAKE CONTROL YAW RATE AND DECELERATION SENSOR
BC199
BC
BRAKE BRAKE CONTROL
YAW RATE AND DECELERATION SENSOR
COMPONENTS
CONSOLE UPPER REAR
PANEL SUB-ASSEMBLY
PARKING BRAKE HOLE
COVER SUB-ASSEMBLY
CONSOLE UPPER REAR
PANEL SUB-ASSEMBLY
PARKING BRAKE HOLE
COVER SUB-ASSEMBLY
CONSOLE UPPER REAR
PANEL SUB-ASSEMBLY
PARKING BRAKE HOLE
COVER SUB-ASSEMBLY
for Automatic Transmission 2WD:
for Manual Transmission 4WD:
for Automatic Transmission 4WD:
SHIFT LEVER KNOB
SUB-ASSEMBLY
SHIFT LEVER KNOB
SUB-ASSEMBLY
SHIFT LEVER KNOB
SUB-ASSEMBLY
C133108E01
BC200
BC
YAW RATE AND
DECELERATION
SENSOR
YAW RATE AND
DECELERATION
SENSOR
13 (136, 10)
13 (136, 10)
13 (136, 10)
13 (136, 10)
for Automatic Transmission:
for Manual Transmission:
YAW RATE AND
DECELERATION
SENSOR CONNECTOR
YAW RATE AND
DECELERATION
SENSOR CONNECTOR
C133071E01
BC201
BC
REMOVAL
TERMINAL
2. REMOVE PARKING BRAKE HOLE COVER SUB-
ASSEMBLY (See page IP-11)
3. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY (for
Manual Transmission) (See page IP-11)
4. REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY (for
4WD) (See page IP-11)
5. REMOVE CONSOLE UPPER REAR PANEL SUB-
6. REMOVE YAW RATE AND DECELERATION SENSOR
(a) Disconnect the yaw rate and deceleration sensor
connector.
(b) Remove the 2 bolts and remove the yaw rate and
deceleration sensor.
C133072E01
BC202
BC
INSPECTION
1. INSPECT YAW RATE AND DECELERATION SENSOR
(a) Check the yaw rate and deceleration sensor.
If any of the following occurs, replace the yaw rate
and deceleration sensor with a new one.
The surface of the yaw rate and deceleration
sensor is cracked, dented or chipped.
The connector is scratched, cracked, or
damaged.
The yaw rate and deceleration sensor has been
dropped.
INSTALLATION
1. INSTALL YAW RATE AND DECELERATION SENSOR
(a) Install the yaw rate and deceleration sensor with the
2 bolts.
Torque: 13 N*m (136 kgf*cm, 10 ft.*lbf)
NOTICE:
Make sure that the sensor is at the correct angle
when installing.
(b) Connect the yaw rate and deceleration sensor
connector.
2. INSTALL CONSOLE UPPER REAR PANEL SUB-
3. INSTALL SHIFT LEVER KNOB SUB-ASSEMBLY (for
4WD) (See page IP-32)
4. INSTALL SHIFT LEVER KNOB SUB-ASSEMBLY (for
Manual Transmission) (See page IP-32)
5. INSTALL PARKING BRAKE HOLE COVER SUB-
TERMINAL
7. PERFORM YAW RATE SENSOR ZERO POINT
CALIBRATION
(See page BC-24)
(See page BC-28)
C133072E01
BRAKE CONTROL STEERING ANGLE SENSOR
BC203
BC
BRAKE BRAKE CONTROL
STEERING ANGLE SENSOR
COMPONENTS
SPIRAL CABLE
STEERING PAD
STEERING WHEEL ASSEMBLY
STEERING WHEEL
COVER LOWER NO.2
STEERING WHEEL
COVER LOWER NO.3
N*m (kgf*cm, ft.*lbf) : Specified torque
8.8 (90, 78 in.*lbf)
8.8 (90, 78 in.*lbf)
LOWER STEERING
COLUMN COVER
50 (510, 37)
UPPER STEERING
COLUMN COVER
C128334E01
BC204
BC
STEERING ANGLE
SENSOR
STEERING ANGLE
SENSOR CONNECTOR
C133073E01
BC205
BC
REMOVAL
1. PRECAUTION
(See page RS-1)
TERMINAL
3. PLACE FRONT WHEELS FACING STRAIGHT AHEAD
4. REMOVE STEERING WHEEL COVER LOWER NO.3
(See page RS-345)
5. REMOVE STEERING WHEEL COVER LOWER NO.2
(See page RS-345)
6. REMOVE STEERING PAD (See page RS-346)
7. REMOVE STEERING WHEEL ASSEMBLY (See page
SR-8)
8. REMOVE LOWER STEERING COLUMN COVER (See
page SR-8)
9. REMOVE UPPER STEERING COLUMN COVER (See
page SR-8)
10. REMOVE SPIRAL CABLE (See page RS-357)
11. REMOVE STEERING ANGLE SENSOR
(a) Disconnect the steering angle sensor connector.
(b) Disengage the claw and disconnect the steering
angle sensor connector and harness.
(c) Disengage the 2 claws and remove the steering
angle sensor.
C133074
C133075
BC206
BC
INSPECTION
1. INSPECT STEERING ANGLE SENSOR
(a) Check the steering angle sensor.
If any of the following occurs, replace the steering
angle sensor with a new one.
The surface of the steering angle sensor is
cracked, dented or chipped.
The connector is scratched, cracked, or
damaged.
The steering angle sensor has been dropped.
BC207
BC
INSTALLATION
1. PRECAUTION
(See page RS-1)
2. INSTALL STEERING ANGLE SENSOR
(a) Install the steering angle sensor.
(b) Connect the harness and steering angle sensor
connector.
(c) Connect the steering sensor connector.
3. INSTALL SPIRAL CABLE (See page RS-358)
4. INSTALL UPPER STEERING COLUMN COVER (See
page SR-17)
5. INSTALL LOWER STEERING COLUMN COVER (See
page SR-18)
6. ADJUST SPIRAL CABLE (See page RS-359)
7. INSTALL STEERING WHEEL ASSEMBLY (See page
SR-18)
8. INSPECT STEERING WHEEL CENTER POINT
9. INSTALL STEERING PAD (See page RS-346)
10. INSTALL STEERING WHEEL COVER LOWER NO.2
(See page RS-347)
11. INSTALL STEERING WHEEL COVER LOWER NO.3
(See page RS-347)
TERMINAL
13. INSPECT STEERING PAD (See page RS-347)
14. PERFORM INITIALIZATION
(See page IN-31)
15. INSPECT SRS WARNING LIGHT
(See page RS-29)
C133075
C133074

Brake Control

Uploaded by

Copyright:

Available Formats

Brake Control

Uploaded by

Document Information

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

Brake Control

Uploaded by

Copyright:

Available Formats

BRAKE CONTROL VEHICLE STABILITY CONTROL SYSTEM

Skid Control ECU

You might also like