CONTROL GP 7X6323 - Caterpillar

Illustration 1 g00840583
Schematic of the Solenoid (oil flow) in the Work Tool Control ValveThis diagnostic code is associated with the Solenoid (oil flow) in the work tool control valve. The FMI 03 means that the machine ECM has determined that the voltage of the solenoid circuit is above normal. The possible causes of the diagnostic code are listed:
The solenoid has failed.
The energize circuit of the solenoid is shorted to the +battery circuit.
The machine 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 1180 FMI 03 is active before performing this procedure.Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.System Response:When the Auxiliary Flow Solenoid (number 1) is shorted to the battery, maximum flow is allowed to the tool. The tool will be activated. The machine ECM will not take any action when this diagnostic code is detected. Test Step 1. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO THE +BATTERY CIRCUIT.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connectors from the solenoid and the machine ECM.
At the machine harness connector for the machine ECM, measure the resistance from contact J2-41 (wire M745-BU) to all contacts that are used in the machine harness connectors for the machine ECM. Expected Result:Each resistance measurement is greater than 5000 ohms. Results:
OK - Each resistance measurement is greater than 5000 ohms. The machine harness is correct. Proceed to Test Step 2.
NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between J2-41 (M745-BU) and the circuit that has a low resistance measurement. Repair: Repair the machine harness or replace the machine harness. Stop.Test Step 2. CHECK IF THE DIAGNOSTIC CODE IS STILL ACTIVE.
Inspect the contacts and clean the contacts 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 1180 FMI 03 is active.Expected Result:The CID 1180 FMI 03 is active.Results:
YES - The CID 1180 FMI 03 is active. The problem has not been corrected. The machine ECM may have failed.Repair: It is unlikely that the machine ECM has failed. Exit this procedure and perform this procedure again. If the cause of the diagnostic code is not found, replace the machine ECM. See Testing and Adjusting, "Electronic Control Module (ECM) - Replace". Stop.
NO - The CID 1180 FMI 03 is not active. The problem 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.