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TERMINALS OF ECM; 2008 MY TAC...

Last Modified: 10-8-2013 6.4 U Doc ID: RM000000SXP010X

Model Year: 2008 Model: Tacoma Prod Date Range: [08/2007 - ]
Title: 2TR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: TERMINALS OF ECM; 2008 MY Tacoma [08/2007 -
]

TERMINALS OF ECM

HINT:

The standard normal voltage between each pair of ECM terminals is shown in the table below. The appropriate
conditions for checking each pair of terminals are also indicated. The result of checks should be compared with
the standard normal voltage for that pair of terminals, displayed in the STD Voltage column. The illustration
above can be used as a reference to identify the ECM terminal locations.

Symbols Wiring STD

Terminal Descriptions Conditions
(Terminals No.) Colors Voltages

BATT (E8-3) - E1 Battery (for measuring battery

L - BR Always 9 to 14 V
(E4-3) voltage and for ECM memory)

+BM (E8-7) - E1
LG - BR Power source of throttle motor Always 9 to 14 V
(E4-3)

IGSW (E8-9) - E1
O - BR Ignition switch Ignition switch ON 9 to 14 V
(E4-3)

+B (E8-1) - E1
B - BR Power source of ECM Ignition switch ON 9 to 14 V
(E4-3)

MREL (E8-8) - E1
G-W - BR EFI relay Ignition switch ON 9 to 14 V
(E4-3)

VC (E4-18) - E2 Power source of sensor (specific

L - BR Ignition switch ON 4.5 to 5.0 V
(E4-28) voltage)

VTA1 (E4-20) - Throttle position sensor (for Ignition switch ON, Accelerator
G-B - BR 0.5 to 1.1 V
E2 (E4-28) engine control) pedal fully released

VTA1 (E4-20) - Throttle position sensor (for Ignition switch ON, Accelerator
G-B - BR 3.3 to 4.9 V
E2 (E4-28) engine control) pedal fully depressed

VTA2 (E4-19) - Throttle position sensor (for Ignition switch ON, Accelerator
G-W - BR 2.1 to 3.1 V
E2 (E4-28) sensor malfunction detection) pedal fully released

VTA2 (E4-19) - G-W - BR Throttle position sensor (for Ignition switch ON, Accelerator 4.5 to 5.0 V
E2 (E4-28) sensor malfunction detection) pedal fully depressed

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Symbols Wiring STD

Terminal Descriptions Conditions
(Terminals No.) Colors Voltages

VPA (E8-18) - R-Y - Accelerator pedal position sensor Ignition switch ON, Accelerator
0.5 to 1.1 V
EPA (E8-20) LG-B (for engine control) pedal fully released

VPA (E8-18) - R-Y - Accelerator pedal position sensor Ignition switch ON, Accelerator
2.6 to 4.5 V
EPA (E8-20) LG-B (for engine control) pedal fully depressed

Accelerator pedal position sensor

VPA2 (E8-19) - GR-B - Ignition switch ON, Accelerator
(for sensor malfunction 1.2 to 2.0 V
EPA2 (E8-21) R-B pedal fully released
detection)

Accelerator pedal position sensor

VPA2 (E8-19) - GR-B - Ignition switch ON, Accelerator
(for sensor malfunction 3.4 to 5.0 V
EPA2 (E8-21) R-B pedal fully depressed
detection)

VCPA (E8-26) - Power source of accelerator pedal

R - LG-B Ignition switch ON 4.5 to 5.0 V
EPA (E8-20) position sensor (for VPA)

VCP2 (E8-27) - Power source of accelerator pedal

L-W - R-B Ignition switch ON 4.5 to 5.0 V
EPA2 (E8-21) position sensor (for VPA2)

Idling, shift position on P or N (for

VG (E5-28) - E2G
R-Y - R-W Mass air flow meter A/T) or neutral (for M/T), A/C 0.5 to 3.0 V
(E5-30)
switch off

THA (E5-29) - E2 Idling, Intake air temperature 20°

R-L - BR Intake air temperature sensor 0.5 to 3.4 V
(E4-28) C (68°F)

THW (E4-32) - E2 Engine coolant temperature Idling, Engine coolant

Y-B - BR 0.2 to 1.0 V
(E4-28) sensor temperature 80°C (176°F)

#10 (E5-6) - E01

(E4-7)
R-L - W-B
#20 (E5-5) - E01
(E4-7) B - W-B
Injector Ignition switch ON 9 to 14 V
#30 (E5-2) - E01 R - W-B
(E4-7)
G - W-B
#40 (E5-1) - E01
(E4-7)

#10 (E5-6) - E01

(E4-7)
R-L - W-B
#20 (E5-5) - E01 Pulse
(E4-7) B - W-B generation
Injector Idling
#30 (E5-2) - E01 R - W-B (see
(E4-7) waveform 1)
G - W-B
#40 (E5-1) - E01
(E4-7)

P - BR Ignition coil with igniter Idling

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Symbols Wiring STD

Terminal Descriptions Conditions
(Terminals No.) Colors Voltages

IGT1 (E4-17) - E1 P-L - BR (ignition signal) Pulse

(E4-3) generation
LG - BR
IGT2 (E4-16) - E1 (see
(E4-3) LG-B - BR waveform 2)

IGT3 (E4-15) - E1
(E4-3)

IGT4 (E4-14) - E1
(E4-3)

IGF1 (E4-23) - E1 Ignition coil with igniter

W-R - BR Ignition switch ON 4.5 to 5.0 V
(E4-3)
(ignition confirmation signal)

Pulse
IGF1 (E4-23) - E1 Ignition coil with igniter generation
W-R - BR Idling
(E4-3) (ignition confirmation signal) (see
waveform 2)

Pulse
G2 (E4-26) - NE- generation
L-G Camshaft position sensor Idling
(E4-34)
(see
waveform 3)

Pulse
NE+ (E4-27) - generation
R-G Crankshaft position sensor Idling
NE- (E4-34)
(see
waveform 3)

FC (E8-25) - E1
L-B - BR Fuel pump control Ignition switch ON 9 to 14 V
(E4-3)

FC (E8-25) - E1
L-B - BR Fuel pump control Idling Below 1.5 V
(E4-3)

Pulse
generation
M+ (E4-5) - ME01
P - W-B Throttle actuator Idling with warm engine
(E5-3)
(see
waveform 4)

Pulse
M- (E4-4) - ME01 generation
L - W-B Throttle actuator Idling with warm engine
(E5-3) (see
waveform 5)

A1A+ (E4-21) -
E1 (E4-3)
P - BR A/F sensor Always (Ignition switch ON) 3.3 V *1

A1A- (E4-31) - E1 L - BR A/F sensor Always (Ignition switch ON) 3.0 V *1

(E4-3)

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Symbols Wiring STD

Terminal Descriptions Conditions
(Terminals No.) Colors Voltages

Pulse
Engine speed maintained 2500 generation
OX1B (E4-25) -
W - BR Heated oxygen sensor rpm for 2 minutes after warming
E2 (E4-28) (see
up sensor
waveform 6)

HA1A (E4-1) -
R - W-B A/F sensor heater Idling Below 3.0 V
E04 (E5-7)

HA1A (E4-1) -
R - W-B A/F sensor heater Ignition switch ON 9 to 14 V
E04 (E5-7)

HT1B (E4-2) -
G - W-B Heated oxygen sensor heater Idling Below 3.0 V
E03 (E5-4)

HT1B (E4-2) -
G - W-B Heated oxygen sensor heater Ignition switch ON 9 to 14 V
E03 (E5-4)

Pulse
generation
KNK1 (E4-29) - Maintain engine speed 4000 rpm
B-W Knock sensor
EKNK (E4-30) after warming up engine
(see
waveform 7)

Pulse
generation
OC1+ (E4-13) - Camshaft timing oil control valve
L-W - W Idling
OC1- (E4-12) (OCV)
(see
waveform 8)

PRG (E5-23) -
Y - W-B Purge VSV Ignition switch ON 9 to 14 V
E01 (E4-7)

Pulse
generation
PRG (E5-23) -
Y - W-B Purge VSV Idling
E01 (E4-7) (see
waveform 9)

Vent valve
VPMP (E8-5) - E1
V-W - BR Ignition switch ON 9 to 14 V
(E4-3)
(built into canister pump module)

MPMP (E8-6) - E1 Leak detection pump

G - BR Leak detection pump OFF 0 to 3 V
(E4-3) (built into canister pump module)

MPMP (E8-6) - E1 Leak detection pump

G - BR Leak detection pump ON 9 to 14 V
(E4-3) (built into canister pump module)

PPMP (E8-31) - GR - BR Canister pressure sensor Ignition switch ON 3 to 3.6 V

E2 (E4-28)
(built into canister pump module)

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Symbols Wiring STD

Terminal Descriptions Conditions
(Terminals No.) Colors Voltages

Shift position on N (for A/T), or

STA (E8-12) - E1 5.5 V or
B-Y - BR Starter signal neutral (M/T), ignition switch
(E4-3) more
START

STP (E7-4) - E1
L - BR Stop light switch Brake pedal depressed 7.5 to 14 V
(E4-3)

STP (E7-4) - E1
L - BR Stop light switch Brake pedal released Below 1.5 V
(E4-3)

ST1- (E8-16) - E1 Ignition switch ON, Brake pedal

V-W - BR Stop light switch Below 1.5 V
(E4-3) depressed

ST1- (E8-16) - E1 Ignition switch ON, Brake pedal

V-W - BR Stop light switch 7.5 to 14 V
(E4-3) released

W (E7-30) - E01
BR - W-B MIL Idling 9 to 14 V
(E4-7)

W (E7-30) - E01
BR - W-B MIL Ignition switch ON Below 3.5 V
(E4-7)

ELS (E8-15) - E1
G - BR Electric load Taillight switch ON 7.5 to 14 V
(E4-3)

ELS (E8-15) - E1
G - BR Electric load Taillight switch OFF 0 to 1.5 V
(E4-3)

Vehicle stationary, Voltage

ELS2 (E7-20) - E1
B-W - BR Electric load inverter outputs more than 100 9 to 14 V
(E4-3)
W

ELS2 (E7-20) - E1 Vehicle stationary, Voltage

B-W - BR Electric load 0 to 1.5 V
(E4-3) inverter outputs 100 W or less

Pulse
generation
TACH (E7-1) - E1
B-W - BR Engine speed Idling
(E4-3) (see
waveform
10)

Pulse
generation
SPD (E7-8) - E1 Speed signal from combination
V-W - BR Driving at 12 mph (20 km/h)
(E4-3) meter (see
waveform
11)

TC (E7-17) - E1
P-B - BR Terminal TC of DLC 3 Ignition switch ON 9 to 14 V
(E4-3)

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Symbols Wiring STD

Terminal Descriptions Conditions
(Terminals No.) Colors Voltages

PSW (E5-32) - E1 G-W - BR Power steering oil pressure While turning steering wheel Below 1.5 V
(E4-3) switch

Pulse
generation
F/PS (E7-32) - E1
R - BR Airbag sensor assembly Idling with warm engine
(E4-3) (see
waveform
12)

NSW (E8-30) - E1 IG switch ON and shift position on

V - BR Park/Neutral switch signal Below 1 V
(E4-3) P or N (for A/T), or neutral (M/T)

IG switch ON and shift position

NSW (E8-30) - E1
V - BR Park/Neutral switch signal except P or N (for A/T), or neutral 9 to 14 V
(E4-3)
(M/T)

Pulse
generation
* Communication signal with other
2 CANH (E7-33) B - BR Ignition switch ON
- E1 (E4-3) components (see
waveform
13)

Pulse
generation
* Communication signal with other
2 CANL (E7-34) - W - BR Ignition switch ON
E1 (E4-3) components (see
waveform
14)

AIRV (E4-24) - E1 Air switching valve for secondary

R-W - BR Ignition switch ON 9 to 14 V
(E4-3) air injection system

AIRP (E4-11) - E1
Y-R - BR Air pump control Ignition switch ON 9 to 14 V
(E4-3)

Pulse
generation
AIDI (E5-20) - E1 Diagnostic information signal for
G-R - BR Air injection system operates
(E4-3) air injection system (see
waveform
15)

AIP (E5-22) - E2 Secondary air injection system

GR - BR Ignition switch ON 4.5 to 5.0 V
(E4-28) pressure signal

*1
: The ECM terminal voltage is constant regardless of the output voltage from the sensor.

*
2: Only for the vehicle equipped with VSC .

1. WAVEFORM 1

Fuel injector

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ECM Terminal Names Between #10 (to 40) and E01

Tester Ranges 20 V/DIV, 20 msec./DIV

Conditions Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

2. WAVEFORM 2

(a) Igniter IGT signal (from ECM to igniter)

(b) Igniter IGF signal (from igniter to ECM)

(a) Between IGT (1 to 4) and E1

ECM Terminal Names
(b) Between IGF1 and E1

Tester Ranges 2 V/DIV, 20 msec./DIV

Conditions Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

3. WAVEFORM 3

(a) Camshaft position sensor

(b) Crankshaft position sensor

(a) Between G2 and NE-

ECM Terminal Names
(b) Between NE+ and NE-

Tester Ranges 5 V/DIV, 20 msec./DIV

Conditions Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

4. WAVEFORM 4

Throttle actuator positive terminal

ECM Terminal Names Between M+ and ME01

Tester Ranges 5 V/DIV, 1 msec./DIV

Conditions Idling with warm engine

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HINT:

The duty ratio varies depending on the throttle actuator operation.

5. WAVEFORM 5

Throttle actuator negative terminal

ECM Terminal Names Between M- and ME01

Tester Ranges 5 V/DIV, 1 msec./DIV

Conditions Idling with warm engine

HINT:

The duty ratio varies depending on the throttle actuator operation.

6. WAVEFORM 6

Heated oxygen sensor

ECM Terminal
Between OX1B and E2
Names

Tester Ranges 0.2 V/DIV, 200 msec./DIV

Engine speed maintained 2500 rpm for 2 minutes after

Conditions
warming up engine

HINT:

In the DATA LIST, item O2S B1S2 shows the ECM input values from the heated
oxygen sensor.

7. WAVEFORM 7

Knock sensor

ECM Terminal
Between KNK1 and EKNK
Names

Tester Ranges 0.01 to 10 V/DIV, 0.01 to 10 msec./DIV

Engine speed maintained 4000 rpm after warming up

Conditions
engine

HINT:

• The wavelength becomes shorter as the engine rpm increases.

• The waveforms and amplitudes displayed differ slightly depending on the
vehicle.

8. WAVEFORM 8

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Camshaft timing oil control valve (OCV)

ECM Terminal Names Between OC1+ and OC1-

Tester Ranges 5 V/DIV, 1 msec./DIV

Conditions Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

9. WAVEFORM 9

Purge VSV

ECM Terminal Names Between PRG and E01

Tester Ranges 5 V/DIV, 50 msec./DIV

Conditions Idling

HINT:

If the waveform is not similar to the illustration, check the waveform again after
idling for 10 minutes or more.

10. WAVEFORM 10

Engine speed signal

ECM Terminal Names Between TACH and E1

Tester Ranges 5 V/DIV, 10 msec./DIV

Conditions Idling

HINT:

The wavelength becomes shorter as the engine rpm increases.

11. WAVEFORM 11

Vehicle speed signal

ECM Terminal Names Between SPD and E1

Tester Ranges 5 V/DIV, 20 msec./DIV

Conditions Driving at 12 mph (20 km/h)

HINT:

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The wavelength becomes shorter as the vehicle speed increases.

12. WAVEFORM 12

Airbag sensor assembly

ECM Terminal Names Between F/PS and E1

Tester Ranges 5 V/DIV, 500 msec./DIV

Conditions Idling with warm engine

13. WAVEFORM 13

CAN communication signal (reference)

ECM Terminal Names Between CANH and E1

Tester Ranges 1 V/DIV, 10 μs/DIV

Conditions Ignition switch ON

14. WAVEFORM 14

CAN communication signal (reference)

ECM Terminal Names Between CANL and E1

Tester Ranges 1 V/DIV, 10 μs/DIV

Conditions Ignition switch ON

15. WAVEFORM 15

Terminal DI of air injection control driver

ECM Terminal
Between AIDI and E1
Names

Tester Ranges 5 V/DIV, 100 ms/DIV

Performing Active Test using Techstream (air injection

Conditions
system)

HINT:

The wavelength changes when the air injection control driver detects
malfunctions in the air injection system .

Copyright 2011 - 2014 Service Repair Solutions, Inc.

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Portions of materials contained herein have been reprinted under license from Toyota Motor Sales,
U.S.A., Inc., License Agreement TMS1003.

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