HARNESS AS-TRANSMISSION 2542298 - Caterpillar

Illustration 1 g03803046
Schematic of the Air Conditioner Compressor Clutch Solenoid
This diagnostic code is associated with the Air Conditioner Compressor Clutch Solenoid. The FMI 05 means that the ECM has determined that an open in the circuit exists. The solenoid is energized by the relay.The possible causes of this diagnostic code are listed below:
The relay has failed.
The energize circuit of the relay is open.
The return circuit of the relay is open.
The ECM has failed. The ECM is unlikely to fail. Note: The following test procedure may create other diagnostic codes. Ignore these created diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 2671 FMI 05 is active before performing this procedure.Note: Use a digital multimeter for the measurements in this procedure.Test Step 1. Check The Relay
The disconnect switch and the key start switch remain in the OFF position.
Disconnect the relay from the machine harness.
At the harness connector for the relay, insert a multimeter probe in contact 5 and contact 2.
Measure the resistance of the relay coil. Expected Result:The resistance of the coil is between 81 ohms and 113 ohms.Results:
OK - The resistance is between 81 and 113 ohms. Proceed to Test Step 2.
NOT OK - The resistance is not between 81 and 113 ohms. The relay has failed.Repair: Replace the relay.Proceed to Test Step 4.Test Step 2. Check The Solenoid
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Disconnect the solenoid with the active diagnostic code from the machine harness.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire E554-PK(Pink)) to contact 2 (wire 200-BK(Black)).
Observe the status of the diagnostic code. Expected Result:The diagnostic code is active. Then, the diagnostic code changes from FMI 05 to FMI 06 after the jumper wire is installed.Results:
YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed to Test Step 3.
NO - The diagnostic is no longer active. The solenoid has failed.Repair: The solenoid has failed. Replace the solenoid. Verify that the new solenoid corrects the problem.STOPTest Step 3. Check The Harness For An Open
The key start switch and the disconnect switch remain in the OFF position.
The relay remains disconnected from the machine harness.
Disconnect the machine harness connector from the ECM.
Connect jumper wire to contact 5