DIFFERENTIAL & BEVEL GEAR GP 3222818 - Caterpillar

Illustration 1 g01620859
Schematic of the circuit for the service connector
This diagnostic code is recorded when the voltage for the clear switch is below normal or shorted low.The possible cause for this diagnostic code is listed below:
The switch is grounded for a period that is greater than 120 seconds.
The 4C-8195 Control Service Tool "(Clicker Box)" may have failed.Verify that the diagnostic code does not only occur when the service tool is in the circuit. The code will change from an active code to a logged code. The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear these diagnostic codes when the original diagnostic code has been corrected.Ensure that the diagnostic code of CID 1837 FMI 04 is active before performing this procedure.Use the 6V-7070 Digital Multimeter for making continuity checks.Test Step 1. CHECK THE HARNESS.
Turn the disconnect switch and the key start switch to the OFF position.
Place a jumper from contact 1 to contact 2 on the service connector.
Disconnect the machine harness connector(s) from the ECM.
Measure the resistance between contacts J2-61 (wire 290-BK(Black)) and J2-62 (wire 291-BK(Black)). Expected Result:The resistance measurement is less than 5 ohms.Results:
YES - The resistance measurement is less than 5 ohms. Proceed to Test Step 2.
NO - The resistance measurement is greater than 5 ohms. The harness has failed. Repair: Repair the wiring harness or replace the wiring harness.STOPTest Step 2. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors and clean the connectors.
Reconnect all harness connectors.
Turn the disconnect switch and the key start switch to the ON position.
Operate the machine.
Determine if the CID 1837 FMI 04 diagnostic code is present. Expected Result:The CID 1837 FMI 04 diagnostic code is active. Results:
YES - The CID 1837 FMI 04 diagnostic code is active. The diagnostic code has not been corrected. The ECM may have failed.Repair: It is unlikely that the ECM has failed. 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 Module (ECM) - Replace".STOP
NO - The CID 1837 FMI 04 diagnostic code is not active. The diagnostic code is NOT present. The diagnostic code does not exist at this time. Repair: The initial diagnostic code was probably caused by a poor electrical connection or a short at one of the harness connectors that was disconnected and reconnected. Resume normal machine operation.STOP