2H9466 YOKE Caterpillar parts YOKE
Alternative (cross code) number:
Weight: 28 pounds 12 kg.
Illustration 1 g01283430
Schematic of the Parking Brake Solenoid CircuitThis diagnostic code is recorded when the ECM detects a short to ground in the electrical path from the ECM to the solenoid.The possible causes are listed:
The signal circuit from the ECM to the solenoid is shorted to ground.
The solenoid has failed.
The ECM has failed. This is unlikely.Note: Before performing this procedure, inspect the harness connectors that are involved in the circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure and in good condition. If a problem with a connection is found, correct the problem and verify that this diagnostic code is active before performing this procedure. Note: The following test procedure may create other diagnostic codes. Ignore the created diagnostic codes. Clear these diagnostic codes when the original diagnostic code is corrected.System Response:CID 681 FMI 05 will generate a level 2 warning. The machine will be brought to a stop and the park brake will engage. The park brake will not release until the diagnostic code has been corrected and the hystat lever has been brought back to the neutral position.Note: Ensure that CID 0681 FMI 06 for the solenoid is active. Note: The following procedure can create numerous related diagnostic codes. When all harnesses are reconnected, the related diagnostic codes will be shown as being not active. Clear all related diagnostic codes after this procedure is completed.Test Step 1. CHECK THE SOLENOID
Turn 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 active CID 0681 FMI 06 diagnsotic 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. Inspect the harness to the solenoid for any failures. Repeat this test "CHECK THE SOLENOID" in order to verify the solenoid failure. Replace the solenoid.STOP
NO - The CID 0681 FMI 06 diagnostic code remains active. Disconnecting the solenoid did not change the status of the active diagnostic code. The solenoid is not causing the problem. Proceed to Test Step 2.Test Step 2. CHECK THE ENERGIZE CIRCUIT OF THE SOLENOID FOR A SHORT TO GROUNDThe solenoid remains disconnected from the machine harness.
Disconnect the negative battery cable and turn the key start switch to the OFF position.
Disconnect the machine harness ECM connectors J1 and J2 from the ECM.
At the machine harness ECM connectors, measure the resistance from the signal contact J2-2 (wire A958-WH) to frame ground. Measure the resistance from the signal contact J2-2 (wire A958-WH) to all of the other contacts that are used in J1 and J2 ECM connectors.
While observing the multimeter resistance measurements, wiggle the machine harness connectors for the ECM