ENGINE AR 4W3807 - Caterpillar

Illustration 1 g03585319This diagnostic code is associated with the rear supply solenoid. This diagnostic code is recorded when the Machine Electronic Control Module (ECM) reads the current of the solenoid as being above normal.The possible causes are listed:
A wire is shorted to ground.
The solenoid has failed.
The ECM may have failed, but is unlikely.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 1606 FMI 06 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:The rear supply solenoid is always de-energized. The ECM will not be able to energize the rear supply solenoid.Note: The failure of any solenoid circuit will disable the engine overspeed control.Test Step 1. CHECK THE SOLENOID
Turn the battery disconnect switch and the key start switch to the ON position.
Disconnect the machine harness from the solenoid.
At the machine harness connector for the solenoid, place a jumper wire from contact 1 (wire G706-BU(Blue)) to contact 2 (wire E790-PK(Pink)).
Observe the status of the diagnostic code. Expected Result:The diagnostic code is active. Then, the diagnostic code is not active as the jumper wire is installed and removed. Results:
YES - The circuit is correct. The solenoid has failed.Repair: Repeat this test "CHECK THE SOLENOID" in order to verify that the solenoid has failed. Replace the solenoid.STOP
NO - The diagnostic code remains active. Proceed to Test Step 2.Test Step 2. CHECK THE SOLENOID CIRCUIT FOR A SHORT TO GROUND
The machine harness remains disconnected from the solenoid.
Turn the key start switch and the battery disconnect switch to the OFF position.
Disconnect the J1 and J2 machine harness connector from the ECM.
At the J1 machine harness connector, measure the resistance from the solenoid contact J1-49 (wire G706-BU(Blue)) to all possible sources of frame ground. Expected Result:Each resistance measurement should be greater than 5 ohms.Results:
YES - The machine harness is correct. Proceed to Test Step 3.
NO - There is a short in the machine harness.Repair: The short is between the wire for the solenoid signal and the circuit with the low resistance measurement. 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 the harness connectors.
Turn the battery disconnect switch and the key start switch to the ON position.
Operate the machine.
Check the status of the CID 1606 FMI 06. Expected Result:The CID 1606 FMI 06 is active. Results:
YES - The CID 1606 FMI 06 is active. The diagnostic code has not been corrected. The ECM may have failed.Repair: The ECM is unlikely to have failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the ECM. Refer to Systems Operation, Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP
NO - The CID 1606 FMI 06 is not active. The diagnostic code