3508, 3508B, 3508C, 3512, 3512B, 3512C, 3516, 3516B and 3516C Engines Caterpillar Monitoring System Caterpillar

Illustration 1	g00573861
Schematic For The Alarm. (1) Locomotive Engines - 410-WH: Marine Engines and Generator Set Engines - 025-GN.

This diagnostic code is recorded when the Main Display Module reads the current in the circuit of the Action Alarm as above normal or the current is shorted to ground. As a result of this fault, the Action Alarm does not sound when the Action Alarm should sound.

1. Check the Alarm.

   1. Disconnect the engine harness from the Action Alarm.

      Note: The Action Alarm has a problem if the FMI 06 diagnostic code is not active. The Action Alarm is not causing the problem if the FMI 06 diagnostic code is still active.

   2. Measure the resistance across the terminals of the Action Alarm.

      Expected Result: The resistance across the terminals is 200 ± 100 Ohms.

      Results:

      OK - The resistance is correct. If the Action Alarm does not sound, proceed to Step 2.

      Not OK - The resistance across the terminals is not correct. Replace the Action Alarm. STOP.

2. Check The Harness.

   1. Turn the "ECS" switch to the OFF/RESET position.

   2. Disconnect the engine harness from the Action Alarm.

   3. Disconnect the engine harness from the Main Display Module.

   4. At the engine harness connector for the Main Display Module, measure the resistance from the connector contact 4 to connector contact 2 (ground).

      Expected Result: The resistance should be greater than 5000 ohms.

      Results

      • OK - The resistance is correct. Proceed to Step 3.

      • Not OK - The resistance is less than 5000 ohms. The engine harness has a problem. Repair the engine harness or replace the engine harness. STOP.

3. Check The Main Display Module.

   1. Turn the "ECS" switch to the OFF/RESET position.

   2. Use the correct service tools to remove contact 4 from the engine harness connector for the Main Display Module.

   3. Reconnect the engine harness connector to the Main Display Module.

   4. Turn the "ECS" switch to the COOLDOWN/STOP position.

      Expected Result: FMI 06 should NOT be active.

      Results:

      • OK - FMI 06 is NOT active. The Main Display Module is NOT causing the problem. The problem 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 as cleaning is required. STOP.

      • Not OK - FMI 06 is still active. The Main Display Module has a problem. Replace the Main Display Module. For more information, see Testing And Adjusting, "Module - Replace".