CUMMINS

ISM
(1999-2002)

Electrical Circuit Diagram

 How to Read This Diagram

SYMBOLS

Connector Splice
Name

Trip Master
(5927) Circuit
Pin Label Breaker

+12V Battery A
Fuse

Ignition B
Diode

J1708(-) C
Twisted Pair
Pin Connection Reference

J1708(+) D A (See Page 1) >> Passthrough Connector

Reference
Destination
Ground

Power
+
ABBREVIATION COLOR

RD RED A Reference
WH WHITE
OR ORANGE
YL/YE YELLOW
PK PINK
BK BLACK
GY GRAY
PU/VT PURPLE
BR/BN BROWN Component
GN GREEN Component
Name M67GA 18-OR
BU/BL BLUE 1
CRS Combustion Air Control
Valve 298-6410 N67DA 18-GN
Capital Abbreviation’s Represent Wire Main Color
Lower Case Abbreviation’s Represent Secondary Color Part 2
Number
Circuit Color
Component Gauge
Connection Number
 Connectors

ECM Wire Diagram

OEM Connector Actuator Connector Sensor Connector

 Page 01 of 08

ISM CM570 (1999-2002)

Sensor Connector

WH Engine Position Sensor 1 (+) Signal

B 47 EP Sensor 1 (+) Signal

GN Engine Position Sensor 1 (-)

Engine Position C 48 EP Sensor 1 (-)
Sensor
RD Engine position sensor 2 (+) Signal
D 50 EP Sensor 2 (+) signal

BK Engine Position Sensor 2 (-)

A 49 EP sensor 2 (-)

Harness Mounted Sensor

Ambient AIR Pressure +5 Volt Supply (VSEN1)

1 A 17 AAP +5 Volt Supply
Ambient Air/
Ambient Air Pressure Signal
Barometric 3 C 06 AAP Signal
Pressure Sensor
Ambient Air Pressure Return
2 B 31 AAP Return

Oil Pressure/Temperature +5 Volt Supply (VSEN2)

1 45 Oil Press/Temp +5 volt Supply

Oil Pressure Signal

Oil Pressure / 3 44 OP Signal
Temperature Sensor
Oil Temperature Signal
4 42 OT Signal

Oil Pressure /Temperature Return

2 43 Oil Press/Temp Return

Coolant Temperature Return

Coolant A 03 Coolant Temperature Return
Temperature sensor
Coolant Temperature Signal
B 02 Coolant Temperature Signal

Centinel +5 Volt Supply (VSEN2)

1
Centinel Oil Level Signal
3 07 Centinel Oil Level Signal

Centinel Oil Level Return

2 26 Centinel Oil Level Return
Centinel Interface
Connector
4
Centinel Actuator
5 A
(See Page 3)
Centinel Return
6 B

Intake Manifold Pressure +5 Volts Supply (VSEN1)

A 37 IM Pressure +5 Volt Supply

Intake Manifold Intake Manifold Pressure Signal

Pressure Sensor C 39 IM Pressure Signal

Intake Manifold Pressure Return

B 40 IM Pressure Return

Intake Manifold Temperature Return

Intake Manifold A
Temperature Sensor
Intake Manifold Temperature Signal
B 38 IM Temperature Signal
 Page 02 of 08

ISM CM570 (1999-2002)

Sensor Connector

Water In Fuel Return

Water In Fuel
A 10 Water In Fuel Return
Sensor Water In Fuel Signal
B 09 Water In Fuel Signal
OEM Responsibility 31-PIN OEM Connector

A Spare Pressure +5 Volt Supply

Coolant Level 01 05 SP +5 Volt Supply
Sensor
B Ambient Air Temperature Signal
04 12 AAT Signal

Ambient Air Temperature Return

03 13 AAT Return

A Spare Pressure Signal

02 04 SP Signal
05 B
06 Coolant Level Coolant Level High Switch Signal
Coolant Level C 05 24 CL High Switch Signal
Module
Shorting Block
Coolant Level Low Switch Signal
07 D 06 22 CL Low Switch Signal

Coolant Level +5 Volt Supply (VSEN2)

19 E 07 25 CL +5 Volt Supply

Coolant Level Return

19 23 CL Return

Coolant Level A
Sensor
C

Icon Parking Brake Signal

31 16 Icon PB Signal
Icon Parking Brake
Switch

PTP /Torque Limit Switch Signal

30 01 PTP/TL Switch Signal
PTP/Torque Limit
Switch Switch Return
24 21 Switch Return

Centinel Make-Up Tank Oil Level Switch Signal

25 46 Cent Make-up TOL Sw Signal
Centinel Make Up
Tank Oil Level Switch

Wet Tank Pressure Sensor +5 Volt Supply

01 01 18 WTP Sensor +5 Volt Supply

Wet Tank Pressure Signal

03 03 19 WTP Signal

Wet Tank Pressure Return

02 02 20 WTP Return
ICON Shorting Wet Tank
Plug Pressure And Air Actuator Connector
Compressor
Air Compressor Actuator/Starter Relay
05 05 14 ACA/Starter Relay
Air Compressor Return
06 06 11 Air Compressor Return

04 04 C (See Page 3)
 Page 02 of 08

ISM CM570 (1999-2002)

OEM Responsibility 31-PIN OEM Connector Actuator Connector

Top 2 Shift /High Gear Actuator

08 45 Top 2 Shift/High Gear Actuator

Top 2 Lockout /Low Gear Actuator Top 2 Lockout/Low Gear

Top 2 09 (Continue 35 Actuator
Transmission From Page 1)
A B

Top 2 Neutral /Centinel Actuator Top 2 Neutral/Centinel

10 34 Actuator
Top 2/ Centinel Return
11 43 Top 2 Centinel Return

Fan Clutch Actuator Signal

12 05 FCA Signal
Fan Clutch 1 Relay
Fan Clutch Actuator Return
13 42 FCA Return

Digital VSS (+)

15 18 Digital VSS (+)
Tachograph
5A Digital VSS (-)
16 17 Digital VSS (-)
Fuse

Air Conditioner Pressure Switch Signal

17 13 ACP Switch Signal
Air Conditioner
Pressure Switch Air Conditioner Pressure Switch Return
18 12 ACP Switch Return

MAG/MECH Vehicle Speed Sensor (+) Signal

A 21 40 MAG/MECH VSS (+) Signal

MAG/MECH Vehicle Speed Sensor (-) Signal

B 22 30 MAG/MECH VSS (-) Signal
Vehicle Speed
Sensor
A

Starter Lockout Starter Lockout Relay/icon Starter Relay/Interlock Signal

20 46 SLR/ISR/Interlock Signal
Relay

Fan Clutch 2 Actuator Signal/Icon Engine Start Alarm FC 2 Actuator Signal/Icon

Fan Clutch 2 Relay 29 25
Engine Start Alarm

Icon Engine Start B

Alarm Icon Alarm Return/Icon Cab Thermostat Return Icon Alarm Return/Icon Cab
A 28 32 Thermostat Return

(Continue
27 C
From Page 2)

Icon Starter Relay

D
(See Page 8)
E
Icon Neutral Icon Hood Tilt
Position Switch Switch
 Page 04 of 08

ISM CM570 (1999-2002)

Actuator Connector

Fuel Shutoff Supply

Fuel Shutoff valve 33 Fuel Shutoff Supply

Wastegate Actuator 1 – Supply Solenoid (Rear)

1 24 WA 1 – Supply Solenoid (Rear)
Waste Gate
Wastegate Actuator 2 – Vent Solenoid (Front)
2 23 WA 2 – Vent Solenoid (Front)

Real Time Clock Battery Back Up Supply (+)

Real Time Clock 1 20 RTC Battery Supply (+)
(RTC) Battery
Real Time Clock Battery Back Up Return (-)
2 47 RTC Battery Return (-)
15 PIN Pass Through
Connector

Cylinder No.1 Supply

1 10 Cylinder 1 Supply
Cylinder # 1
Cylinder No.1 Return
2 09 Cylinder 1 Return

Cylinder No.2 Supply

3 08 Cylinder 2 Supply
Cylinder # 2
Cylinder No.2 Return
4 07 Cylinder 2 Return

Cylinder No.3 Supply 06 Cylinder 3 Supply

5
Cylinder # 3
Cylinder No.3 Return
6 16 Cylinder 3 Return

Cylinder No.4 Supply

7 26 Cylinder 4 Supply
Cylinder # 4
Cylinder No.4 Return
8 36 Cylinder 4 Return

Cylinder No.5 Supply

9 04 Cylinder 5 Supply
Cylinder # 5
Cylinder No.5 Return
10 03 Cylinder 5 Return

Cylinder No.6 Supply

11 02 Cylinder 6 Supply
Cylinder # 6
Cylinder No.6 Return
12 01 Cylinder 6 Return

Engine Brake Actuator # 1

A 13 44 Engine Brake Actuator # 1
Engine Brake # 1
1
Engine Brake
Signal Disconnect
2
Engine Brake Actuator # 2
B 14 15 Engine Brake Actuator # 2
Engine Brake # 2
Engine Brake Return
C 15 31 Engine Brake Return
 Page 05 of 08

ISM CM570 (1999-2002) Typical Vehicle Chassis Wiring

(See OEM vehicle schematic for more info)

OEM Connector

A Remote Throttle Position +5 Volts Supply

Remote Throttle Remote Throttle Position Signal

Assembly B 21 RT Position Signal

Remote Throttle Return

C

Remote PTO Enable Signal Remote PTO Enable Signal

B 34
Remote PTO Switch
Remote PTO Enable Return
A

Remote Throttle Enable Signal

Remote Throttle
B 43 RT Enable Signal
Switch
Remote Throttle Enable Return (-)
A 20 RT Enable Return (-)

Bulk Head Connector

Cab Governor Switch Signal

B 25 CGS Signal
Cab Governor Switch
Cab Common Return #2 (-)
A 10 CCR # 2 (-)

Cab Common Return #1 (-)

A 09 CCR # 1 (-)
Tachometer
Tachometer Signal
B 11 Tachometer Signal

Spare Cab Common Return (-)

19 Spare Cab Common Return (-)
Accelerator Assembly Robert Shaw Accelerator Assembly Williams

Accelerator Position +5V DC Supply

5 C C C 48 Accel Position +5V DC Supply

Accelerator Position Signal

3 B A B 47 Accelerator Position Signal

Accelerator Position Return

4 A B A 49 Accelerator Position Return
Accelerator
Assembly
2 C D C Off- Idle Switch Signal
03 Off-Idle Switch Signal

8 B E B On-Idle Switch Signal

13 On-Idle Switch Signal

1 A F A

B
Clutch Switch
Clutch Switch Signal
A 02 Clutch Switch Signal

B
Brake Switch
A Service Brake Switch Signal 01 Service Brake Switch Signal
 Page 06 of 08

ISM CM570 (1999-2002) Typical Vehicle Chassis Wiring

(See OEM vehicle schematic for more info)

OEM Connector
Bulk Head Connector
CC/PTO Resume/Accel/RSG -
Cruise Control/PTO Resume /Accel/RSG -/Dec Switch Signal
E 24 /Dec Sw Signal

Cruise Control /PTO Cruise Control/PTO Set/Coast/RSG +/INC Switch Signal

Resume/Set Switch F 14 CC/PTO Set/Coast/RSG+/INC
Sw Signal

MAX Operating
Speed Switch

Cruise Control/PTO On/Off Switch Signal

G 23 CC/PTO On/Off Switch Signal

Accelerator Inter
Lock Switch
Maximum Switched Engine Speed Switch Signal
L 41 MSE Speed Switch Signal

Engine Brake On/Off

Switch Accelerator Interlock Switch Signal
M 42 AI Switch Signal

Engine Brake
Selector Switch

Engine Brake Engine Brake Selector #1 Switch Signal

J 22 EBS # 1 Switch Signal
Selector Switch
Engine Brake Selector #2 Switch Signal
K 31 EBS # 2 Switch Signal

Stop Lamp
B 06 Stop Lamp
Stop Lamp

Warning Lamp
C 16 Warning Lamp
Warning Lamp

Maintenance Lamp
P 05 Maintenance Lamp
Maintenance Lamp

Icon Lamp
D 04 Icon Lamp
Icon Lamp
F
(See Page 7)
 Page 07 of 08

ISM CM570 (1999-2002) Typical Vehicle Chassis Wiring

(See OEM vehicle schematic for more info)

OEM Connector
Bulk Head Connector

Diagnostic /Snapshot
44 Diagnostic/Snapshot
Diagnostic On/Off
Switch

Manual Fan Switch Signal

Manual Fan On/Off
15 MFS Signal
Switch

Idle Shutdown /Icon Ignition Bus Relay Idle Shutdown/Icon Ign Bus
Idle Shutdown Relay
35 Relay
or Ignition Bus Relay

Engine Protection Shutdown Override Switch Signal

Engine Protection 12 EPS Override Switch Signal
Shutdown Override
Switch (Continue
F
From Page 6)
Key Switch
38 Key switch

G (See page 8)

Battery (-)
E
Battery (+)
C
6-Pin Data Link
Connector J1708 Data Link (+)
A
J1708 Data Link (-)
B

Battery (-)
A To Battery (-)

Battery (+)

+
B To Battery (+)
J1939 Data Link (+)
C
9-Pin Data Link J1939 Data Link (-)
Connector D
J1939 Data Link Shield
E
J1708 Data Link (+)
F 26 J1708 Data Link (+)

J1708 Data Link (-)

G 27 J1708 Data Link (-)

J1939 Data Link (+)

A 46 J1939 Data Link (+)

3-Pin Data Link J1939 Data Link (-)

Connector B 37 J1939 Data Link (-)

J1939 Data Link shield

C 36 J1939 Data Link Shield
 Page 08 of 08

ISM CM570 (1999-2002) Typical Vehicle Chassis Wiring

(See OEM vehicle schematic for more info)

OEM Connector
(Continue
from Page7)
UnSwitched Power (+)
G 07 UnSwitched Power (+)

Ignition 5A UnSwitched Power (+)

08 UnSwitched Power (+)

Battery 15A UnSwitched Power (+)

Key Switch B 17 UnSwitched Power (+)

UnSwitched Power Return (-)

29 UnSwitched Power Return (-)

UnSwitched Power Return (-)

30 UnSwitched Power Return (-)

UnSwitched Power Return (-)

F 39 UnSwitched Power Return (-)

UnSwitched Power Return (-)

40 UnSwitched Power Return (-)

- UnSwitched Power Return (-)

D 50 UnSwitched Power Return (-)
Battery
15A UnSwitched Power (+)
+ A 18 UnSwitched Power (+)

UnSwitched Power (+)

28 UnSwitched Power (+)

Icon Cab Thermostat Input Signal Icon Cab Thermostat Input

32 Signal

E 33
5A

(Continue
From Page 3)

Icon Ambient Air Temperature sensor Supply Signal

4 ICON CAB 1

1 THERMOSTAT 2 2
Ambient Air
(Continue Temperature Sensor
D 2
From Page 3) Icon Ambient Air Temperature Return 1
3 3