PULLEY 8N9411 - Caterpillar

Illustration 1 g01365695
Schematic of the hoist proportioning solenoid for raise
This diagnostic code is associated with the hoist proportioning solenoid for raise. This diagnostic code is recorded when the Power Train/Chassis Electronic Control Module (ECM) reads the voltage of the solenoid circuit as being above normal. The circuit is shorted to the +battery circuit.The possible causes of this failure are listed:
The energized circuit for the solenoid is shorted to the +battery circuit.
The ECM has failed. This 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 0724 FMI 03 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:The hoist proportioning solenoid for raise is always energized. The ECM will energize the hoist proportioning solenoid for lower in order to keep the body from moving. The body does not move. After the diagnostic code has been corrected, return the hoist control lever to the HOLD position. The hoist control lever is returned to the HOLD position before the hoist system will operate correctly.Test Step 1. CHECK THE SIGNAL CIRCUIT FOR A SHORT
Turn the key start switch and the battery disconnect switch to the OFF position.
Disconnect the machine harness from the solenoid.
Disconnect the machine harness connectors J1 and J2 from the ECM.
At machine harness connector 1, measure the resistance from the solenoid signal contact J1-65 (wire G704-YL(Yellow)) to all other J1 and J2 connector contacts. Expected Result:Each resistance should be greater than 5 ohms.Results:
YES - Each resistance is greater than 5 ohms. The machine harness is correct. Proceed to Test Step 2.
NO - There is a short in the machine harness.Repair: The short is between the signal contact J1-65 (wire G704-YL(Yellow)) and the circuit with the low resistance measurement. Repair the machine harness or replace the machine harness.STOPTest Step 2. 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 0724 FMI 03. Expected Result:The CID 0724 FMI 03 is active.Results:
YES - The CID 0724 FMI 03 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. Refer to Systems Operation, Troubleshooting, Testing and Adjusting, "Electronic Control Module (ECM) - Replace".STOP
NO - The CID 0724 FMI 03 is not active. 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