3406E and 3456 Generator Set Engines Caterpillar

The Electronic Control Module (ECM) detects all of the following conditions:

• The engine is running and the engine is not cranking.

• The ECM reads battery voltage that is below 9 VDC for at least two seconds.

• The ECM has been powered for at least three seconds.

System Response:

The ECM will log the diagnostic code. The code may be viewed on the Caterpillar Electronic Technician (ET).

Possible Performance Effect:

• Engine misfires

• Engine shutdown

Troubleshooting:

Test Step 1. Perform the following diagnostic procedure: "Electrical Power Supply Circuit - Test"

Results:

• OK - STOP