## Diesel Engine Management System

#### DTC Troubleshooting (cont'd)

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DTC P0338: Over Speed Detection

1. Check the ''On Board Diagnostic (OBD) System Check''.

Was the ''OBD System Check'' performed?

YES – Go to step 2.

NO – Go to OBD System Check.

1. Check the DTC.

Is there other DTC P0335 (beside DTC P0338) being output?

YES – Go to DTC P0335 chart.

NO – Go to step 3.

1. Turn the ignition switch ON (II).

1. Review and record scan tool failure records data.

1. Check the engine speed in failure records data.

Is there more than 6,000 rpm (min-1)?

YES – Contact the customer.

NO – Verify the customer complaint.

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