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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 06 means that the machine ECM has determined that the current of the solenoid is above normal.
The possible causes of this diagnostic code are listed:
- The energize circuit of the solenoid is shorted to ground.
- 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 06 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 solenoid. 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 solenoid from the machine harness.
- 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 diagnostic code.
Expected Result:
The diagnostic code is active. Then, the diagnostic code is NOT active when the jumper wire removed.
Results:
- YES - The circuit is correct. The solenoid has failed.
Repair: Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.
Stop.
- NO - CID 0681 FMI 06 remains active. Proceed to Test Step 2.
Test Step 2. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUND
- Turn the key start switch and the disconnect switch to the OFF position.
- The solenoid remains disconnected from the machine harness.
- Disconnect the machine harness connector(s) from the ECM.
- At the machine harness connector, measure the resistance from the signal contact J1-10 (wire G730-PK) to all contacts that are used in the machine harness connectors for the ECM.
- Observe the resistance.
Expected Result:
Each resistance measurement is greater than 5 ohms.
Results:
- OK - Each resistance measurement is greater than 5 ohms. The machine harness is correct. Proceed to Test Step 3.
- NOT OK - Each resistance measurement is not greater than 5 ohms. There is a short in the machine harness. The short is between J1-10 (wire G730-PK) and the circuit with the low resistance measurement.
Repair: Repair the machine harness or replace the machine harness.
Stop.
Test Step 3. CHECK IF THE DIAGNOSTIC CODE IS STILL ACTIVE
- Inspect the harness connectors 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.
- Check the status of the CID 0681 FMI 06.
Expected Result:
The CID 0681 FMI 06 is active.
Results:
- YES - The CID 0681 FMI 06 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 06 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.