Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check for proper operating conditions.
3. Check if the engine was motoring downhill when the fault was logged.

Was the vehicle motoring downhill?

YES

GO TO 2.

NO

Check the base engine for damage due to overspeed condition.

1. Turn ignition switch OFF.
2. Check for an alternate fuel source.
3. Check if the driver reported a fuel-controlled event where the engine rapidly accelerated to or past 3400 RPM, followed by moderate deceleration to 3400 RPM.

Is there an alternate fuel source?

YES

Locate any alternate fuel sources, such as operating the engine near flammable vapors, blown turbocharger seals, etc.

NO

GO TO 3.

1. Connect CONSULT.
2. Start engine.
3. Check engine RPM Data Monitor item on the CONSULT screen.
4. Compare the Data Monitor reading to a mechanical tachometer or the combination meter tachometer.

Is the RPM reading correct?

YES

GO TO 4.

NO

Refer to DTC Description and DTC Description .

1. Check for ENGINE diagnostic trouble codes.
2. Check for DTC P0219-00 being current on the CONSULT screen when the engine is operating above 3200 RPM.

Is DTC P0219-00 current at low RPM?

YES

GO TO 5.

NO

Replace the ECM. Refer to Removal and Installation .

1. Road test the vehicle.
2. Check for DTC P0219-00 being past on the CONSULT screen.

.

Test the vehicle in a road test or the vessel in a sea trail to determine if the overspeed condition is still present.

Is DTC P0219-00 past?

YES

Refer to Intermittent Incident .

NO

GO TO 1.