This document provides an electrical circuit diagram and descriptions for a Cummins ISB CM2150 diesel engine from 2007-2009. It includes: 1) A key listing abbreviations for wire colors and component names/numbers. 2) A multi-page diagram showing engine sensors, actuators and their electrical connections to the ECM and vehicle wiring. 3) Pinouts and descriptions for the ECM and other connectors. The diagram provides technicians with information to trace circuitry and diagnose electrical issues. Abbreviations standardize the representation of colors for consistent identification.

1. CUMMINS
Electrical Circuit Diagram
ISB CM2150
(2007-2009)
Revision #1 : 12/10/2018

2. How to Read This Diagram
ABBREVIATION COLOR
RD
WH
OR
YL/YE
PK
BK
GY
PU/VT
BR/BN
GN
BU/BL
RED
WHITE
ORANGE
YELLOW
PINK
BLACK
GRAY
PURPLE
BROWN
GREEN
BLUE
Capital Abbreviation’s Represent Wire Main Color
Lower Case Abbreviation’s Represent Secondary Color
ABBREVIATION COLOR
RD
WH
OR
YL/YE
PK
BK
GY
PU/VT
BR/BN
GN
BU/BL
RED
WHITE
ORANGE
YELLOW
PINK
BLACK
GRAY
PURPLE
BROWN
GREEN
BLUE
Capital Abbreviation’s Represent Wire Main Color
Lower Case Abbreviation’s Represent Secondary Color Part
Number
Component
Name
Component
Component
Connection
1
2
1
2
1
2
CRS Combustion Air Control
Valve 298-6410
M67GA 18-OR
N67DA 18-GN
Circuit
Number
Gauge
Color
Part
Number
Component
Name
Component
Component
Connection
1
2
CRS Combustion Air Control
Valve 298-6410
M67GA 18-OR
N67DA 18-GN
Circuit
Number
Gauge
Color
A
+12V Battery
B
C
D
Ignition
J1708(-)
J1708(+)
Trip Master
(5927)
Connector
Name
Pin Label
Pin Connection
A
+12V Battery
B
C
D
Ignition
J1708(-)
J1708(+)
Trip Master
(5927)
Connector
Name
Pin Label
Pin Connection
A (See Page 1)
Reference
Reference
Destination
A (See Page 1)
Reference
Reference
Destination
A
+12V Battery
B
C
D
Ignition
J1708(-)
J1708(+)
Trip Master
(5927)
Connector
Name
Pin Label
Pin Connection
A (See Page 1)
Reference
Reference
Destination
SYMBOLS
Splice
Ground
Fuse
Twisted Pair
Diode
Passthrough Connector
Circuit
Breaker
+
+
+ Power
>>
>>
A Reference
How to Read This Diagram
ABBREVIATION COLOR
RD
WH
OR
YL/YE
PK
BK
GY
PU/VT
BR/BN
GN
BU/BL
RED
WHITE
ORANGE
YELLOW
PINK
BLACK
GRAY
PURPLE
BROWN
GREEN
BLUE
Capital Abbreviation’s Represent Wire Main Color
Lower Case Abbreviation’s Represent Secondary Color Part
Number
Component
Name
Component
Component
Connection
1
2
CRS Combustion Air Control
Valve 298-6410
M67GA 18-OR
N67DA 18-GN
Circuit
Number
Gauge
Color
A
+12V Battery
B
C
D
Ignition
J1708(-)
J1708(+)
Trip Master
(5927)
Connector
Name
Pin Label
Pin Connection
A (See Page 1)
Reference
Reference
Destination
SYMBOLS
Splice
Ground
Fuse
Twisted Pair
Diode
Passthrough Connector
Circuit
Breaker
+ Power
>>
A Reference

3. CONNECTORS

4. ISB CM2150 (2007-2009)
Page 1 of 8
Turbocharger Speed
Sensor
ECM Connector
TurbochargerSpeed Signal (-)
Turbocharger Speed Signal (+)
Engine Camshaft
Speed/Position Sensor
Engine Camshaft Speed/Position Signal
Engine Camshaft Speed/Position Return
Engine Camshaft Speed/Position +5 Volt Supply
Fuel Rail Pressure
Sensor
Fuel Rail Pressure +5 Volt Supply
Fuel Rail Pressure Return
Fuel Rail Pressure Signal
Intake Manifold
Temperature/Pressure
Sensor
Intake Manifold Pressure Signal
Intake Manifold Temperature/Pressure Return
Intake Manifold Temperature/Pressure +5 Volt Supply
Crankcase Pressure
Sensor
Crankcase Pressure Signal
Crankcase Pressure Return
Crankcase Pressure +5 Volt Supply
31
21
37
29
19
50
(See Page 2)
(See Page 2)
2
1
2
1
2
1
2
1
1
2
3
1
2
3
1
2
3
1
2
3
3
2
1
3
2
1
3
2
1
3
2
1
A B
Engine Crankshaft
Speed/Position Sensor
Engine Crankshaft Speed/Position Signal
Engine Crankshaft Speed/Position Return
Engine Crankshaft Speed/Position +5 Volt Supply Sensor Supply #3
42
44
26
Exhaust Gas
Pressure Sensor
3
2
1
3
2
1
3
2
1
3
2
1
Exhaust Gas Pressure Signal
Exhaust Gas Pressure Return
Exhaust Gas Pressure +5 Volt Supply
15
Intake Manifold Temperature Signal
11
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
EGR Differential
Pressure Sensor
1
2
3
1
2
3
1
2
3
1
2
3
23
EGR Differential Pressure +5 Volt Supply
EGR Differential Pressure Return
EGR Differential Pressure Signal
Turbocharger Speed Signal (-)
Turbocharger Speed Signal (+)
EC Speed/Position Signal
EC Speed/Position Return
EC Speed/Position +5 Volt Supply
Engine Camshaft Speed/Position
Signal
Fuel Rail Pressure Return
Intake Manifold Pressure Signal
Exhaust Gas Pressure Signal
Crankcase Pressure Signal
Intake Manifold Temperature
Signal
EGR Differential Pressure Signal
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1
3
2
1

5. Ambient Air Temperature Signal
ISB CM2150 (2007-2009)
Page 2 of 8
ECM Connector
EGR Valve
EGR Position +5 Volt Supply
EGR Position Signal A
EGR Position Signal C
36
Ambient Air
Temperature/
Barometric Air
Pressure Sensor
Barometric Pressure Signal
Barometric Pressure/Ambient Air Temperature Return
Barometric Pressure/Ambient Air Temperature +5 Volt Supply
20
EGR Position Signal B
05
(Continued
From Page 1)
(Continued
From Page 1)
A B
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
35
25
04
48
02
03
EGR Motor Return
EGR Motor Supply C
EGR Motor Supply B
EGR Motor Supply A
Sensor Supply #1
Sensor Return
2
1
2
1
2
1
Fuel Pump Actuator
Fuel Pump Actuator Signal
Fuel Pump Actuator Return
14
10 Fuel Pump Actuator Signal
Fuel Pump Actuator Return
Sensor Return
Sensor Supply #1
EGR Temperature
Sensor
2
1
2
1
2
1
EGR Temperature Signal
EGR Temperature Return
41
Engine Coolant
Temperature Sensor
2
1
2
1
2
1
Engine Coolant Temperature Signal
Engine Coolant Temperature Return
Water in Fuel Sensor
2
1
2
1
2
1
Water in Fuel Signal
Water in Fuel Return
34
49
EGR Temperature Signal
Engine Coolant Temperature
Signal
Water in Fuel Signal
1
2
3
4
1
2
3
4
1
2
3
4
1
2
3
4
24
1
2
3
4
1
2
3
4
Ambient Air Temperature Signal
Barometric Pressure Signal
47 Sensor Return
Sensor Return
EGR Position Signal A
EGR Position Signal C
EGR Position Signal B
EGR Motor Supply C
EGR Motor Supply B
EGR Motor Supply A
Engine Oil Pressure
Switch
32
1
1
1
Engine Oil Pressure Switch Signal
Engine Oil Pressure Switch Signal

6. ISB CM2150 (2007-2009)
Page 3 of 8
ECM Connector
SAE J1939 Datalink/
Termination Resistor
SAE J1939 (+)
SAE J1939 (-)
38
39
A
B
A
B
A
B
SAE J1939 Datalink/
Service Tool Connector
SAE J1939 (+)
SAE J1939 (-)
3
4
1
2
3
4
1
2
3
4
1
2
VGT Actuator
VGT Actuator J1939 (+)
VGT Actuator J1939 (-)
VGT Actuator +12 Volt Supply
VGT Actuator Return
40
33
Sensor Return
1
2
3
1
2
3
1
2
3
Engine Oil Level
Sensor
22
Engine Oil Level Signal
Engine Oil Level +12 Volt Supply
Engine Oil Level Return
Injector 1
Injector 2
Injector Solenoid Driver Cylinder #1 Signal
Injector Solenoid Driver Cylinder #1 Return
57
53
46
52
Injector 3
Injector 4
56
51
54
60
F
E
D
C
Injector Solenoid Driver Cylinder #2 Signal
Injector Solenoid Driver Cylinder #2 Return
Injector Solenoid Driver Cylinder #3 Signal
Injector Solenoid DriverCylinder #3 Return
Injector Solenoid Driver Cylinder #4 Signal
Injector Solenoid Driver Cylinder #4 Return
SAE J1939 (+)
SAE J1939 (-)
VGT Actuator +12 Volt Supply
Sensor Return
Engine Oil Level Signal
ISD Cylinder #1 Signal
ISD Cylinder #1 Return
ISD Cylinder #2 Signal
ISD Cylinder #2 Return
ISD Cylinder #3 Signal
ISD Cylinder #3 Return
ISD Cylinder #4 Signal
ISD Cylinder #4 Return
Injector 5
Injector 6
55
59
45
58
Injector Solenoid Driver Cylinder #5 Signal
Injector Solenoid Driver Cylinder #5 Return
Injector Solenoid Driver Cylinder #6 Signal
Injector Solenoid Driver Cylinder #6 Return
ISD Cylinder #5 Signal
ISD Cylinder #5 Return
ISD Cylinder #6 Signal
ISD Cylinder #6 Return
B
A
F
E
D
C
B
A
Rocker Lever Cover Gasket-Injector Pass-Through
1
2
1
2
1
2
1
2

7. ISB CM2150 (2007-2009)
Page 4 of 8
ECM Connector
4
2
1
27
C
A
B
D
F
E
C
A
B
D
F
E
APS2
APS2
C
A
B
D
F
E
APS2
APS2
C
B
A
C
B
A
C
A
B
C
A
B
C
A
B
D
F
E
APS2
APS2
C
B
A
C
A
B
35
28
26
25
22
Accelerator Position 1, +5 Volt Supply
Accelerator Position 1 Signal
Accelerator Position 1 Return
Accelerator Position 2, +5 Volt Supply
4(C)
6(A)
5(B)
3(D)
2(E)
1(F)
4(C)
6(A)
5(B)
3(D)
2(E)
1(F)
APS2
APS2
4(C)
6(A)
5(B)
3(D)
2(E)
1(F)
APS2
APS2
Teleflex Morse Accelerator Pedal Assembly Williams Accelerator Pedal Assembly
Accelerator Position 2 Signal
Accelerator Position 2 Return
Sensor Supply 5
Sensor Supply 4
Sensor Return
OEMConnector
Typical Vehicle Chassis Wiring
(See OEM vehicle schematic for more info)
Magnetic/Digital
Vehicle Speed Sensor
A
B
A
B
A
B
Magnetic Vehicle Speed Signal (+)/Digital Vehicle Speed Signal
Magnetic Vehicle Speed Signal (-)
33
23
C D
Sensor Supply 5
Sensor Return
Accelerator Position 1, +5 Volt
Supply
Accelerator Position 1 Signal
Accelerator Position 1 Return
Accelerator Position 2 Signal
MVS Signal (+)/DVS Signal
MVS Signal (-)
(See Page 5)
(See Page 5)
Injector 1
Injector 2
Injector Solenoid Driver Cylinder #1 Signal
Injector Solenoid Driver Cylinder #1 Return
57
53
46
52
Injector 3
Injector 4
56
51
54
60
3
Injector Solenoid Driver Cylinder #2 Signal
Injector Solenoid Driver Cylinder #2 Return
Injector Solenoid Driver Cylinder #3 Signal
Injector Solenoid Driver Cylinder #3 Return
Injector Solenoid Driver Cylinder #4 Signal
Injector Solenoid Driver Cylinder #4 Return
ISD Cylinder #1 Signal
ISD Cylinder #1 Return
ISD Cylinder #2 Signal
ISD Cylinder #2 Return
ISD Cylinder #3 Signal
ISD Cylinder #3 Return
ISD Cylinder #4 Signal
ISD Cylinder #4 Return
Injector 5
Injector 6
55
59
45
58
Injector Solenoid Driver Cylinder #5 Signal
Injector Solenoid Driver Cylinder #5 Return
Injector Solenoid Driver Cylinder #6 Signal
Injector Solenoid Driver Cylinder #6 Return
ISD Cylinder #5 Signal
ISD Cylinder #5 Return
ISD Cylinder #6 Signal
ISD Cylinder #6 Return
Rocker Lever Housing-Injector Pass-Through
4
2
1
3
4
2
1
3
&
(See Page 7)
&
(See Page 7)

8. ISB CM2150 (2007-2009)
Page 5 of 8
Remote Accelerator
Pedal/Lever Assembly
Remote Accelerator Pedal/Lever Assembly 5 Volt Supply
Remote Accelerator Pedal/Lever Signal
Remote Accelerator Pedal/Lever Return
37
A
B
C
A
B
C
A
B
C
Engine Coolant Level
Sensor
E
60
Engine Coolant Level +5 Volt Supply (Only For 3 Wires Sensor)
Engine Coolant Level Signal
Engine Coolant Level Return
OEMPressure Sensor 56
OEMPressure +5 Volt Supply
OEMPressure Signal
OEMPressure Return
(See Page 7)
(See Page 7)
OEMConnector
Typical Vehicle Chassis Wiring
(See OEM vehicle schematic formore info)
Remote Accelerator Pedal/Lever
Signal
Engine Coolant Level Signal
OEMPressure Signal
C D
(Continued
From Page 4)
(Continued
From Page 4)
VGT Brake On/Off
Switch
05
Clutch/Engine
Protection Override
Switch
Cruise Control/PTO
Set Resume Select
Switch
15
19
30
VGT Brake On/Off Signal
Clutch/Engine Protection Override Signal
Cruise Control/PTO Resume/Accelerate/Increment Switch Signal
Cruise Control/PTO Set/Coast/Decrement Switch Signal
Cruise Control/PTO
On/Off Switch
Air Conditioner
Pressure Switch
10
Fan Control Switch
Air Conditioner Pressure/Fan Control Switch Signal
16
Cruise Control/PTO On/Off Switch Signal
(See Page 6)
(See Page 6)
Accelerator
Interlock/Engine
Torque Limit Switch
Accelerator Interlock/Engine Torque Limit Signal
17
Service Brake
Position Switch
Service Brake Position Signal
24
VGT Brake On/Off Signal
Clutch/EPO Signal
CC/PTOResume/Accelerate/
Increment Switch Signal
CC/PTOSet/Coast/Decrement
Switch Signal
ACP/FC Switch Signal
CC/PTOOn/Off Switch Signal
AI/ET Limit Signal
Service Brake Position Signal
F

9. ISB CM2150 (2007-2009)
Page 6 of 8
OEMConnector
Typical Vehicle Chassis Wiring
(See OEM vehicle schematic for more info)
Aftertreatment
Diesel Particulate
Filter Regeneration/
Diagnostic Test Mode
Switch
Maximum Operating
Speed/Governor
Type Switch
07
Remote Accelerator
On/Off Switch
Remote PTO On/Off
Switch
Rear Axle Ratio
Switch
Tachograph
F
(Continued
From Page 5)
(Continued
From Page 5)
Aftertreatment Diesel Particulate Filter Regeneration/Diagnostic Test Mode Signal
20
Maximum Operating Speed/Governor Type Switch Signal
Remote Accelerator On/Off Signal
08
Remote PTO On/Off Signal
18
Rear Axle Ratio Signal
11
Tachograph Signal
42
Tachometer
12
41
High Exhaust System
Temperature Lamp
58
TachometerOutput Signal
Switch Return
High Exhaust System Temperature Lamp Signal
Intake Air Heater
Relay
54
44
Intake Air Heater Relay Signal
Intake Air Heater Relay Return
Switched Output #1
Switch
59
Switched Output #1 Signal
Switched Output #1 Return
Starter Lockout/
Switched Output #2
Switch
Idle Shutdown Relay
Starter Lockout/Switched Output #2 Signal
Starter Lockout/Switched Output #2 Return
02
14
Idle Shutdown Relay Return
Idle Shutdown Relay Signal
ADP Filter Regeneration/DTM
Signal
Maximum Operating Speed/
Governor Type Switch Signal
Remote Accelerator On/Off
Signal
Remote PTO On/Off Signal
Rear Axle Ratio Signal
Tachograph Signal
Tachometer Output Signal
Switch Return
HEST Lamp Signal
Intake Air Heater Relay Signal
Intake Air Heater Relay Return
Switched Output #1 Signal
Starter Lockout/Switched Output
#2 Signal
Idle Shutdown Relay Signal

10. ISB CM2150 (2007-2009)
Page 7 of 8
OEMConnector
Typical Vehicle Chassis Wiring
(See OEM vehicle schematic for more info)
Fan Clutch
32
Fan Clutch Signal
52
Fan Clutch Return
Braking Lamp Relay
55
Braking Lamp Relay Signal
Braking Lamp Relay Return
Fan Speed Sensor
13
C
D
Fan Speed Signal
Fan Speed Return
Fan Speed +5 Volt Supply
1
2
1
2
1
2
Aftertreatment Diesel
Oxidation Catalyst
Inlet Temperature
Sensor
1
2
1
2
1
2
Aftertreatment Diesel
Particulate Filter Inlet
Temperature Sensor
1
2
1
2
1
2
Aftertreatment Diesel
Particulate Filter
Outlet Temperature
Sensor
3
2
1
3
2
1
3
2
1
Aftertreatment Diesel
Particulate Filter
Differential Pressure
Sensor
Aftertreatment Diesel Oxidation Catalyst Inlet Temperature Signal
Aftertreatment Diesel Oxidation Catalyst Inlet Temperature Return
Aftertreatment Diesel Particulate Filter Inlet Temperature Signal
Aftertreatment Diesel Particulate Filter Inlet Temperature Return
Aftertreatment Diesel Particulate Filter Outlet Temperature Signal
Aftertreatment Diesel Particulate Filter Outlet Temperature Return
Aftertreatment Diesel Particulate Filter Differential Pressure +5 Volt Supply
Aftertreatment Diesel Particulate Filter Differential Pressure Signal
Aftertreatment Diesel Particulate Filter Differential Pressure Return
49
40
09
34
1 1
2 2
3 3
4 4
5 5
6 6
7 7
Aftertreatment Interface
Connector (Optional)
OEMTemperature/
OEMSwitch
OEMTemperature/OEM Switch Signal
ECM Return Sensor Return
50
38
Fan Clutch Signal
Fan Clutch Return
Braking Lamp Relay Signal
Fan Speed Signal
ADOC Inlet Temperature Signal
ADPF Inlet Temperature Signal
ADPF Outlet Temperature Signal
ADPF Differential Pressure Signal
OEMTemperature/OEM Switch
Signal
ECM Return
(Continued
From Page 4)
(Continued
From Page 4)
E
(Continued
From Page 5)
(Continued
From Page 5)

11. ISB CM2150 (2007-2009)
Page 8 of 8
OEMConnector
Service Tool Connector
29
Battery (+)
39
Battery (-)
01
J1587 Data Link (+) SAE J1587 Data Link (+)
21
Amber Warning Lamp
Aftertreatment Diesel
Particulate Filter
Lamp
Key Switch
Wait to Start Lamp Return
Red Stop Lamp Return
Amber Warning Lamp Return
Aftertreatment Diesel Particulate Filter Lamp Return
ECM Battery Return (-) (Optional)
ECM Battery Return (-)
53
47
43
57
B
Battery
Ground Terminal
45
SAE J1587 Data Link (+)
SAE J1587 Data Link (-)
SAE J1939 Data Link (+)
Wait to Start Lamp Return
Red Stop Lamp Return
Amber Warning Lamp Return
Aftertreatment Diesel
Particulate Filter Lamp Return
Ignition / KeySwitch Input
Signal
A
F
G
C
D
9-Pin DEUTSCH Connector
J1587 Data Link (-) SAE J1587 Data Link (-)
J1939 (+) SAE J1939 Data Link (+)
J1939 (-) SAE J1939 Data Link (-)
SAE J1939 Data Link (-)
Wait to Start Lamp
Red Stop Lamp
5A
5A Ignition
2
1
3
4
30A
30A
Fuse
Fuse
ECM Battery Supply (+) (Optional)
ECM Battery Supply (+)
OEMPower Connector
Typical Vehicle Chassis Wiring
(See OEM vehicle schematic for more info)