5130, 5130B and 5230 Excavators, 784B, 785B, 785C, 789B, 789C, 793B and 793C Off-Highway Truck/Tractors and 992G, 994 and 994D Wheel Loaders Vital Information Management System (VIMS) Caterpillar


CID 0271 FMI 06 Alarm (Action) Current Above Normal - Test

Usage:

793B 1HL


Illustration 1g00506532
Schematic of Action Alarm Circuit

This diagnostic code is recorded when the VIMS module reads the current of the action alarm circuit (wire 410-WH(White)) and the current is above normal. The action alarm circuit is shorted to ground. The action alarm does not SOUND as a result of this fault condition.

  1. CHECK THE ALARM.

    1. Disconnect the machine harness from the alarm.

      Expected Result: The diagnostic code changes from CID 0271 FMI 06 to CID 0271 FMI 05.

      Results:

      • OK - The diagnostic code has not changed. diagnostic code CID 0271 FMI 06 remains active. The action alarm is not causing the fault. Proceed to 2.

      • NOT OK - The diagnostic code is NO longer active. The alarm has failed. Replace the action alarm. The correct resistance for a good alarm is 200 ± 100 ohms. STOP.

  2. CHECK THE HARNESS.

    1. Turn the disconnect switch to the OFF position.

    2. The alarm remains disconnected from the machine harness.

    3. Disconnect the machine harness from the main module.

    4. At the machine harness connector for the VIMS module, measure the resistance between contact 24 (wire 410-WH(White)) and frame ground.

      Expected Result: The resistance is greater than 5000 ohms.

      Results:

      • OK - Resistance is greater than 5000 ohms. The harness resistance is correct. Proceed to 3.

      • NOT OK - Resistance is less than 5000 ohms. The harness has failed. Repair the machine harness or replace the machine harness. STOP.

  3. CHECK THE MODULE.

    1. Use the correct service tools to remove contact 24 from the machine harness connector of the VIMS module.

    2. Reconnect the machine harness connector to the module.

    3. Turn the disconnect switch and the key start switch to the ON position.

    4. Verify that the diagnostic code CID 0271 FMI 06 is still active.

      Expected Result: The diagnostic code CID 0271 FMI 06 is still active.

      Results:

      • OK - The diagnostic code (CID 0271 FMI 06) is still active. The main module has failed. Replace the main module. See Testing and Adjusting, "Module - Replace". STOP.

      • NOT OK - The diagnostic code is NO longer active. The main module is not causing the diagnostic code. The diagnostic code is intermittent. The probable cause is a poor electrical connection at the harness connectors or a damaged harness. Check the harness for damage and clean the harness connectors. STOP.

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