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 to the PCM through circuit RES08 (GN/BN) and the clockspring. When the brake pedal is applied, the smart junction box (SJB) sends a message to the PCM to deactivate the speed control if engaged.

The speed control deactivator switch (part of the stoplamp switch) interrupts circuit CES09 (VT/OG) removing the voltage signal to the PCM when the brake pedal is applied. This is a redundant signal to the PCM.

Vehicles equipped with a manual transaxle have an additional clutch pedal speed control deactivator switch. The PCM sends a signal through circuit CE904 (GN/VT) to the clutch pedal speed control deactivator switch. The return signal is sent to the PCM through circuit RE407 (YE/VT).

This pinpoint test is intended to diagnose the following:

• Wiring, terminals or connectors
• PCM not configured for speed control
• Stoplamp switch
• Clutch Pedal Position (CPP) switch
• Speed control switch
• Digital Transmission Range (TR) sensor
• Vehicle speed signal
• PCM