## Diesel Engine Management System

#### DTC Troubleshooting (cont'd)

11-109

1. Turn the engine ON at idling.

1. Check the RP sensor signal voltage.

Is about 1V indicated?

YES – Intermittent failure, system is OK at this time. Check for poor connections or loose wires at the RP sensor and at the ECM.

NO – Replace the RP sensor.

1. Disconnect the RP sensor 3P connector.

1. Check the RP sensor signal circuit for short. Turn the ignition switch ON (II).

Is a problem found?

YES – Repair the RP sensor signal circuit for short.

NO – Go to step 11.

1. Turn the ignition switch OFF.

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