COVER-REAR 4814465 - Caterpillar

Illustration 1 g02709241
Connections 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 detected that the current for the solenoid circuit is below normal.Conditions that cause this diagnostic code to be activated are:
The energize circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The ECM has failed. The failure of the ECM is unlikely.System Response:
Air conditioning will not work properly.Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure and in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure.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.Note: A digital multimeter will be required for the measurements in this procedure.Test Step 1. CHECK THE SOLENOID
Disconnect the solenoid 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 A275-BK(Black).
Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
Observe the status of the CID 2671 FMI 05 diagnostic code.Expected Result:The CID 2671 FMI 05 diagnostic code is no longer active. A CID 2671 FMI 06 diagnostic code becomes active when the jumper wire is connected.Results:
YES - The CID 2671 FMI 05 diagnostic code is no longer active. A CID 2671 FMI 06 diagnostic code becomes active when the jumper wire is connected. The solenoid has failed.Repair: Repeat this Test Step "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem.STOP
NO - The CID 2671 FMI 05 diagnostic code remains active. The jumper wire does not affect the status of the active diagnostic code. The solenoid is not causing the problem. Proceed