C9 Marine Auxiliary and Marine Generator Set Engines Caterpillar

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

• The signal from the secondary engine speed/timing sensor has been lost and the engine speed did not pass through the range of 350 rpm to 500 rpm.

• The engine has been running for more than three seconds.

• The battery voltage is greater than 9 VDC for more than two seconds prior to the loss of the signal.

System Response:

The ECM will log the diagnostic code and the ECM will trigger a snapshot. The ECM will ignore the secondary engine speed/timing sensor.

None

Note: If the signals from both engine speed/timing sensors are lost, then the engine will shut down.

Test Step 1. Perform the following diagnostic procedure: Engine Speed/Timing Sensor Circuit - Test

Results:

• OK - STOP