Test C: DTC P0579 Or DTC P0581 - Cruise Control Switch Circuit Failure

PINPOINT TEST C: DTC P0579 OR DTC P0581 - CRUISE CONTROL SWITCH CIRCUIT FAILURE

Normal Operation
The PCM sends a signal through circuit 151 (LB/BK) to the speed control switches, which passes through the clockspring. The return signal is sent through circuit 848 (DG/OG) and the clockspring.

DTC P0579 (Cruise Control Switch Circuit Failure) - may set when the speed control switch circuits are open, shorted to voltage or shorted to ground.

DTC P0581 (Cruise Control Switch Circuit Failure) - sets when the speed control switch circuits are shorted to voltage or open.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Clockspring
- Speed control switch
- PCM

C1:

C1-C3:

C3-C5:

C5-C7:

C7-C8:

C9-C11:

C11-C12:

C13: