COUPLING GP-GENERATOR 5N2912 - Caterpillar

Illustration 1 g02625971
Schematic of the "Push Button Switch (Transmission Hold)"This diagnostic code is recorded when the voltage for the 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 25 seconds.Note: 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 1292 FMI 04 is active before performing this procedure.Note: 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.
Disconnect the machine harness from the switch.
Disconnect the machine harness connectors from the ECM.
Measure the resistance between contacts J1-35 (wire 708-YL) and J2-22 (wire A283-BK) of the machine harness to all the contacts that are used in machine harness connectors for the ECM.Expected Result:Each resistance measurement is greater than 5 ohms.Results:
YES - Each resistance measurement is greater than 5 ohms. The ECM has failed.Repair: 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 Module (ECM) - Replace".STOP
NO - One or more of the resistance measurements are less than 5 ohms. The harness has failed. The short is between J1-35 (wire 708-YL) and the circuit with the lowest resistance or the short is between J2-22 (wire A283-BK) and the circuit with the lowest resistance. Repair: Repair the wiring harness or replace the wiring harness.STOPTest Step 2. CHECK THE OPERATION OF THE SWITCH.
The machine harness remains disconnected from the switch.
Connect one lead from a multimeter to contact1 (wire A283-BK) of the harness connector for the switch.
Connect the other lead from a multimeter to contact 2 (wire 708-YL) of the harness connector for the switch.
Measure the resistance between contact 1 (wire A283-BK) and contact 2 (wire 708-YL). Note the resistance.
Press and hold the switch.
Measure the resistance between contact 1 (wire A283-BK) and contact 2 (wire 708-YL). Note the resistance.Expected Result:The resistance from contact 1 (wire A283-BK) to contact 2 (wire 708-YL) alternates between less than 5 ohms and more than 5 ohms as the switch is actuated. Results:
YES - The resistance from contact 1 (wire A283-BK) to contact 2 (wire 708-YL) is correct. The switch is operating correctly. Proceed to Test Step 3.
NO - The resistance measurements are NOT correct. The switch has failed.Repair: Replace the switch.STOPTest Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS.
Inspect the contacts of the harness connectors. Clean the connectors of the harness 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 1292 FMI 04 diagnostic code is present. Expected Result:The CID 1292 FMI 04 diagnostic code is active. Results:
YES - The CID 1292 FMI 04 diagnostic code is active. The diagnostic code has not been corrected. The