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| Illustration 1 | g01045127 |
Schematic of the solenoid valve (parking brake) | |
This diagnostic code is associated with the parking brake solenoid (No.1). The FMI 05 means that the ECM has determined that the current of the solenoid is below normal.
The possible causes of this diagnostic code are listed below:
- There is an open in the circuit.
- The solenoid has failed.
- 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 0681 FMI 05 is active before performing this procedure.
Note: Use the 146-4080 Digital Multimeter for the measurements in this procedure.
System Response:
When this diagnostic code is active, the ECM will be unable to control the parking brake solenoids. The parking brake will always be engaged.
Test Step 1. CHECK THE SOLENOID
- Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
- Disconnect the machine harness from the solenoid.
- At the machine harness connector for the solenoid, place a jumper wire from connector contact 1 (wire G730-PK) to connector contact 2 (wire 975-WH).
- Observe the status of the CID 0681 FMI 05.
Expected Result:
The CID 0681 FMI 05 remains active. The FMI has not changed and the "05" is still active.
Results:
- YES - The diagnostic code remains active. The jumper wire does not affect the diagnostic code. Proceed to Test Step 2.
- NO - The diagnostic is no longer active. The solenoid has failed.
Repair: The solenoid has failed. Repeat this Test Step "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid. Verify that the new solenoid corrects the problem.
Stop.
Test Step 2. CHECK THE HARNESS FOR AN OPEN
- Turn the key start switch and the disconnect switch to the OFF position.
- Disconnect the J1 machine harness connector from the ECM.
- The jumper wire that was used in the previous Test Step remains in place when testing the solenoid circuit.
- At the J1 machine harness connector, measure the resistance from connector contact J1-10 (wire G730-PK) to connector contact J1-7 (wire 975-WH).
- Observe the resistance.
Expected Result:
The resistance is less than 5 ohms.
Results:
- OK - The resistance is less than 5 ohms. The machine harness is correct. Proceed to Test Step 3.
- NOT OK - The resistance is greater than 5 ohms. There is an open circuit in the machine harness.
Repair: The open is in wire G730-PK or in wire 975-WH of the machine harness. Repair the machine harness or replace the machine harness.
Stop.
Test Step 3. CHECK IF THE DIAGNOSTIC CODE REMAINS
- Inspect the contacts of the harness connectors and clean the harness connectors.
- Reconnect all harness connectors.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the machine.
- Check the status of the CID 0681 FMI 05.
Expected Result:
The CID 0681 FMI 05 is active.
Results:
- YES - The CID 0681 FMI 05 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 (Power Train) - Replace" for the machine that is being serviced.
Stop.
- NO - The CID 0681 FMI 05 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.