ALTERNATOR GP- 1631011 - Caterpillar

Illustration 1 g02708745
Schematic of the Auxiliary Extend SolenoidThis diagnostic code is associated with the Auxiliary Extend Solenoid. The FMI 05 diagnostic code means that the ECM has determined that an open in the circuit exists. The possible causes of this diagnostic code are listed:
The energize circuit of the solenoid is open.
The return circuit of the solenoid is open.
The solenoid has failed.
The ECM has failed. This situation is unlikely. Note: The function of the Auxiliary Extend Solenoid is dependent on the CAN 2 Data Link. If a data link communication error is present, correct the associated diagnostic code before proceeding. Ensure that the diagnostic code of CID 1145 FMI 05 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.Test Step 1. 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 P957-BR) to contact 2 (wire K876-YL).
Observe the status of the CID 1145 FMI 05 diagnostic code.Expected Result:The CID 1145 FMI 05 diagnostic code remains active.Results:
YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed to Test Step 2.
NO - The diagnostic is no longer active. The solenoid has failed.Repair: The solenoid has failed. Repeat this Test Step "CHECK THE SOLENOID" to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem.STOPTest Step 2. CHECK THE HARNESS FOR AN OPEN.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connectors from the ECM.
The jumper wire that was installed in the previous Test Step remains in place.
At the machine harness connector, measure the resistance from signal contact J2-7 (wire P957-BR) to contact J2-35 (wire K867-YL).Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. The machine harness is correct. Proceed to Test Step 3.
NOT OK - The resistance is greater than 5 ohms. The resistance measurement is not correct. There is an open circuit in the machine harness.Repair: The open is in wire P957-BR or in wire K867-YL of the machine harness. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors and clean the harness connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 1145 FMI 05 diagnostic code.Expected Result:The CID 1145 FMI 05 diagnostic code is active. Results:
YES - The CID 1145 FMI 05 diagnostic code is active. The diagnostic code has not been corrected. The ECM may have failed.Repair: A failure of the ECM is unlikely. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. See Testing and Adjusting, "Electronic Control