VALVE GP-QUICK-DROP 2343042 - Caterpillar

Illustration 1 g02025857
Schematic of the Hydraulic Oil Temperature sensor This diagnostic code is associated with the Hydraulic Oil Temperature sensor. An FMI 04 diagnostic code means that the Monitor ECM has determined the voltage of the sensor is below normal. The ECM records this diagnostic code from information received from the Monitoring System through the Cat® Data Link.Possible causes of this diagnostic code are listed below:
The sensor has failed.
The sensor output signal circuit is shorted to ground.
The Monitor ECM may have failed (unlikely).System Response:Diagnostic code CID 0600 FMI 04 will be logged in the internal memory of the Machine ECM.Test Step 1. CHECK THE SENSOR, AND THE MONITOR ECM.
Turn the engine OFF. Turn the disconnect switch and the key start switch to the OFF position.
Disconnect the machine harness from the sender.
Turn the disconnect switch and the key start switch to the ON position. Turn the engine back ON.
Observe the status of the CID 0600 FMI 04 diagnostic code.Expected Result:The CID 0600 FMI 04 diagnostic code is no longer present.Results:
YES - The CID 0600 FMI 04 diagnostic code is no longer active. The sensor has failed. Repair: Replace the sender.STOP
NO - The CID 0600 FMI 04 diagnostic code remains active. The sensor is not the cause of the code. Proceed to Test Step 2.Test Step 2. CHECK THE HARNESS FOR A SHORT TO GROUND.
The sensor remains disconnected from the machine harness.
Turn the engine OFF. Turn the disconnect switch and the key start switch to the OFF position.
At the machine harness connector for the sensor, measure the resistance between the sensor output signal, contact (wire 491-PK), and frame ground.Expected Result:The resistance is greater than 5000 ohms.Results:
OK - The resistance is greater than 5000 ohms. The harness circuit resistance is correct. Repair: A failure of the Monitor ECM is unlikely.Perform Test Step 2 again. If the problem has NOT been found, and the diagnostic code is still active, the Monitor ECM may have failed.Prior to replacing an ECM, always contact your Dealership Technical Communicator for possible consultation with Caterpillar, or with the Dealer Solutions Network. If the Monitor ECM needs to be replaced, see Testing and Adjusting , "Electronic Control Module (ECM) - Replace". STOP
NOT OK - The resistance is less than 5000 ohms. The machine harness has failed. There is a short between frame ground and the sensor output signal circuit in the machine harness. Repair: Repair, or replace, the machine harness.STOP