Replace the Engine/Injector Wiring Harness Assembly for C-15 Petroleum Engine

CAT P/N 237-7595, 242-7248, and 122-1486

Figure 1.1 - Engine/Injector Harness (C-15)

#Remove/Install Procedures:

Figure 1.2 - Harness Wiring Engine/ECM (Before)

CAT 237-7595, and 242-7248

1). Disconnect the negative Battery terminal at the Battery.

2). Loosen allen head screw, and disconnect harness assembly from the ECM (J2/P2 and J1/P1 ECM connectors).

3). Remove all Clip (ladder) and Strap-cable.

4). Remove all Engine sensors connectors: Oil Pressure Sensor, Atmospheric Pressure Sensor, Fuel Pressure Sensor, Fuel Temperature Sensor, Inlet Air Temperature Sensor, Inlet Manifold/Boost Pressure Sensor, Secondary Speed/Timing Sensor, Primary Speed/Timing Sensor, and Coolant Temperature Sensor.

5). Remove P61 Customer connector, and P300 Unit Injector connector.

Figure 1.3 - Harness Wiring Engine/ECM (After)

6). Install new Harness wiring Engine/ECM assembly.

CAT 122-1486

1). Remove Cover valve mechanism group.

Figure 1.4 - Cover valve Mechanism

→Loosen all fastener bolts.

2). Remove Base-valve mechanism cover and Injector harness group.

Figure 1.4 - Base-valve Mechanism Cover

→Loosen all bolts.

→Remove all Cap connector (Unit Injector).

Figure 1.5 - Valve mechanism and Injector Unit

→Remove all Clip, Mounting-Cable tie, and Strap-cable. 

→Remove Harness wiring assembly (Electronic unit Injector).

Figure 1.6 - Base-valve cover and Injector harness

3). Install new Injector harness assembly, and the Base-valve mechanism cover.

4). Connect the Battery system, and access the Injector Solenoid Test through CAT ET software. Read More: Injector Solenoid Test using Caterpillar ET Software.

Figure 1.7 - Injector Solenoid Test

5). Install the Cover valve mechanism.

6). Starts the Engine.

Read More:

Injector Trim Calibration using Caterpillar ET Software

Injector Codes Calibration using Caterpillar ET Software

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