TUBE ASSEM. 2V5654 - Caterpillar

Illustration 1 g02128735
Schematic for the Action AlarmThis diagnostic code is recorded when the Monitoring System ECM reads the current of the circuit for the action alarm and the current is above normal. The action alarm does not SOUND as a result of this diagnostic code. The schematic that is shown above represents a typical installation of the component. Verify the connector contact and the wire numbers by utilizing the Electrical System Schematic for the machine that is being serviced. System Response:When this diagnostic code is active, the following occurs:
The alarm horn is disabled.
Operator station fault lamp is active.Test Step 1. CHECK THE ALARM.
Disconnect the machine harness from the alarm.Expected Result:The CID 0271 FMI 06 remains present.Results:
OK - The diagnostic code remains present. The action alarm is not causing the diagnostic code. Proceed to test step 2.
NOT OK - The diagnostic code is NO longer present. The correct resistance for a good alarm is 200 100 ohms. The alarm has failed.Repair: Replace the action alarm.STOPTest Step 2. CHECK THE HARNESS.
Turn the disconnect switch to the OFF position.
The alarm remains disconnected from the machine harness.
Disconnect the machine harness from the Monitoring System ECM.
At the machine harness connector for the Monitoring System ECM, measure the resistance between contact 54 (410-WH) and frame ground.Expected Result:The resistance is greater than 5000 ohms. Results:
OK - The resistance is greater than 5000 ohms. The harness resistance is correct. Proceed to test step 3.
NOT OK - The resistance is less than 5000 ohms. The harness has failed.Repair: Repair the machine harness or replace the machine harness.STOPTest Step 3. CHECK THE MODULE.
Remove contact 54 from the machine harness connector for the Monitoring System ECM by utilizing the correct service tools.
Reconnect the machine harness connector to the module.
Turn the disconnect switch and the key start switch to the ON position.
Place the same diagnostic code on hold and check the service code indicator.Expected Result:The CID 0271 FMI 06 is present.Results:
OK - The CID 0271 FMI 06 remains present. The Monitoring System ECM may have failed.Repair: If the cause of the problem is not found, contact the Technical Communicator for your dealership for possible consultation with Caterpillar. This consultation may greatly reduce repair time. Failure of the ECM is unlikely. Exit this procedure and perform this diagnostic code procedure again. If the problem has not been found, then replace the Monitoring System ECM. See Troubleshooting, "Main Display Module - Replace".STOP
NOT OK - The diagnostic code is NO longer active. The diagnostic code does not exist at this time. 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