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| Illustration 1 | g01366153 |
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Connections of the parking brake solenoid 2 | |
This diagnostic code is associated with the parking brake solenoid 2. The FMI 06 means that the 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 1610 FMI 06 is active before performing this procedure.
Note: Use a digital multimeter for the measurements in this procedure.
System Response:
The ECM will disable the circuit for the solenoid valve. The parking brake will engage.
Test Step 1. CHECK THE SOLENOID.
- Turn the disconnect switch and the key start switch to the ON position. Do not start the engine.
- Observe the status of the diagnostic code.
- Disconnect the solenoid with the active diagnostic code from the machine harness.
Expected Result:
The FMI 06 changes to FMI 05 after the solenoid is disconnected.
Results:
- YES - The FMI 06 changes to FMI 05 after the solenoid is disconnected. The circuit is correct.
Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.
STOP
- NO - The 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 contact J2-44 to all contacts that are used in the machine harness connectors for the 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 3.
- NOT OK - Each resistance measurement is not greater than 5000 ohms. There is a short in the machine harness. The short is between contact J2-44 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 REMAINS.
- Inspect the harness connectors. Clean the contacts of the harness connectors and check the wires for damage to the insulation that is caused by excessive heat, battery acid, or chafing.
- Perform a
45 N (10 lb) pull test on each of the wires that are associated with the circuit. - Reconnect all harness connectors. Make sure that the harness connectors are fully seated and that the clips for each connector are completely fastened.
- Turn the disconnect switch and the key start switch to the ON position.
- Operate the vehicle.
- Check the status of the diagnostic code.
Expected Result:
The diagnostic code is active.
Results:
- YES - The diagnostic code is active. The diagnostic code has not been corrected.
Repair: Check the circuit again. It is unlikely that the ECM has failed. Exit this procedure and perform this procedure again. Prior to replacing an ECM, always contact your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. If the ECM requires replacing, refer to Testing and Adjusting, "Electronic Control Module (ECM) - Replace".
STOP
- NO - The diagnostic code is not active. The diagnostic code does not exist at this time. The initial diagnostic code was probably caused by a poor electrical connection at one of the harness connectors that was disconnected and reconnected. Resume normal vehicle operation.
STOP