PUMP GP-METERING 4T6923 - Caterpillar

Illustration 1 g01124942
Schematic of the quick steering switch
This diagnostic code is associated with the quick steering switch. The switch is connected to two inputs of the ECM. One contact is open and the other contact is grounded during proper operation. The possible causes of this diagnostic code are listed:
The normally open contact and the normally closed contact are open.
The contact that is currently closed to ground is shorted to the +battery circuit.Note: The following test procedure may create other diagnostic codes. Ignore these diagnostic codes and clear the diagnostic codes when the original diagnostic code has been corrected. Ensure that the diagnostic code of CID 0747 FMI 03 is active before performing this procedure.Test Step 1. CHECK THE GROUND CIRCUIT OF THE SWITCH IN THE HARNESS.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector(s) from the ECM.
Measure the resistance between contact J1-13 (wire 202-BK(Black)) of the machine harness for the ECM and contact (wire 202-BK(Black)) at the switch. Expected Result:The resistance is less than 5 ohms. Results:
OK - The resistance is less than 5 ohms. The circuit is correct. Proceed to Test Step 2.
NOT OK - The resistance is greater than 5000 ohms. The circuit is open. The machine harness has failed.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 2. CHECK THE SWITCH CIRCUITS FOR A SHORT TO THE +BATTERY CIRCUIT.
The machine harness connector(s) remains disconnected from the ECM.
The disconnect switch and the key start switch remain in the OFF position.
Disconnect contact N/O (wire G749-YL(Yellow)) and contact (wire G748-PU(Purple)) from the connector of the switch.
At the machine harness connector for the ECM, measure the resistance from contact N/O (wire G749-PU(Purple)) and contact N/C (wire G748-YL(Yellow)) of the machine harness to all the contacts that are used in the machine harness connectors for the ECM. Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The harness is correct. Proceed to Test Step 3.
NO - One or more of the measurements were less than 5 ohms. There is a short in the machine harness. Repair: The short is between wire G748-PU(Purple) and the circuit with the lowest resistance measurement or the short is between wire G749-YL(Yellow) and the circuit with the lowest resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE SWITCH CIRCUITS IN THE HARNESS.
The machine harness remains disconnected from the ECM and the switch.
At the harness connector for the switch, connect a jumper wire between contact N/O (wire G749-YL(Yellow)) and contact N/C (wire G748-PU(Purple)).
At the harness connector for the ECM, measure the resistance from contact J2-60 (wire G749-YL(Yellow)) to contact J2-61 (wire G748-PU(Purple)). Expected Result:The resistance is less than 5 ohms. Results:
OK - The resistance is less than 5 ohms. Proceed to Test Step 4.
NOT OK - The resistance is greater than 5000 ohms. The circuit is open.Repair: The machine harness has failed. Repair the machine harness or replace the machine harness.STOPTest Step