Normal Operation

The PCM sends a signal through circuit VES10 (WH) to the speed control switches which passes through the clockspring. The return signal is sent through circuit RES08 (GN/BN) and the clockspring.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• PCM not configured for speed control
• Parking brake system concern
• Speed control switch
• Digital transmission range (TR) sensor
• Vehicle speed signal
• PCM