DISC 0851115 - Caterpillar

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Schematic for the Parking Brake Solenoid
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General Area Location for the Parking Brake Solenoid(RH Side)
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Parking Brake Solenoid(obscured from view beneath the hoses)This diagnostic code is associated with the Parking Brake Solenoid. A code of FMI 06 indicates that the Machine ECM has detected a current above normal in the circuit of the solenoid.The conditions which cause the activation of this diagnostic code include the following:
The energize circuit of the solenoid is shorted to a ground source.
The solenoid has failed.
The ECM has failed. This is unlikely. System Response:When this diagnostic code is active, a Level 2 Warning will occur.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.Note: The resistance of the solenoid coil should be 27 1.4 ohms at 20 °C (68.0 °F).Test Step 1. CHECK THE STATUS OF THE DIAGNOSTIC CODE
Inspect the harness connectors. Clean the contacts of the harness connectors. Check the wires for damage to the insulation that is caused by excessive heat, corrosion, 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 connectors are fully seated and the clips for each connector are completely fastened.
Turn the disconnect switch and the key start switch to the ON position.
Use the Caterpillar Electronic Technician (ET) service tool, if available, in order to perform a "Wiggle Test" on the machine wiring harness. The wiggle test can detect intermittent shorts or opens in the machine wiring harness.
Operate the machine.
Determine if the CID 0681 FMI 06 diagnostic code is active.Expected Result:The CID 0681 FMI 06 diagnostic code is active.Results:
YES - The CID 0681 FMI 06 diagnostic code is active. The problem has not been corrected. Proceed to Test Step 2.
NO - The CID 0681 FMI 06 diagnostic code diagnostic code 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.STOPTest Step 2. CHECK THE SOLENOID
The disconnect switch and the key start switch remain in the ON position. Do not start the engine.
Observe the status of the diagnostic code.
Disconnect the machine harness at the solenoid.Expected Result:The active CID 0681 FMI 06 diagnostic code changes to a CID 0681 FMI 05 diagnostic code when the solenoid is disconnected.Results:
YES - The active CID 0681 FMI 06 diagnostic code changes to a CID 0681 FMI 05 diagnostic code when the solenoid is disconnected. The solenoid circuit in the machine harness is correct.Repair: The solenoid has failed. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. The resistance of the solenoid coil should be 27 1.4 ohms at 20 °C (68.0 °F). Replace the solenoid.STOP
NO - The CID 0681 FMI 06 diagnostic code remains active. Disconnecting the solenoid did not