A CID 500 FMI 12 means that the GSC+P is unable to accurately measure the AC voltage and the AC current. The engine remains able to run. The engine also remains able to start.
Note: On the GSC+P, the CID 500 FMI 12 diagnostic code will be shown even when the Engine Control Switch (ECS) is in the OFF/RESET position.
Test Step 1. VERIFY THAT THE DIAGNOSTIC CODE IS ACTIVE.
- The CID 500 FMI 12 is active.
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If a CID 500 FMI 12 occurs and the engine is running, the generator output may be at full voltage potential. This could occur even if the GSC display is showing 0 AC volts and 0 AC current for all three phases. |
Expected Result:
The CID 500 FMI 12 is active.
Results:
- YES - The CID 500 FMI 12 is active.
Repair: Replace the GSC+P. Refer to Testing And Adjusting, "EMCP Electronic Control (Generator Set) - Replace".
STOP
- NO - The CID 500 FMI 12 is NOT active.
Repair: The GSC+P is operating normally.
STOP