PUMP GP 8U4235 - Caterpillar

Illustration 1 g00507589
Schematic of the Automatic Lubrication Solenoid This diagnostic code is recorded when the VIMS module reads the electrical circuit for this solenoid and the circuit is open.
CHECK FOR OPEN HARNESS
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector from the module.
Measure the resistance from contact 31 of the solenoid circuit (wire 801-PK) to the solenoid return (frame ground). Expected Results: The resistance is 30 to 65 ohms.Results:
OK - The resistance is 30 to 65 ohms. The resistance of the solenoid circuitry is correct. Inspect the contacts of harness connectors. Reconnect the harness connector to the module and check the message center for the same diagnostic code. If the diagnostic code is present, the interface module has failed. Replace the VIMS interface module. Refer to the Testing and Adjustment, "Module - Replace" section. STOP.
NOT OK - The resistance is NOT 30 to 65 ohms. The solenoid has failed or the circuitry of the solenoid harness has failed. Verify the machine harness. Repair the machine harness or replace the machine harness, if necessary. If the machine harness is not the cause of the diagnostic code then replace the solenoid. STOP.