Test A: The Speed Control Is Inoperative

PINPOINT TEST A: THE SPEED CONTROL IS INOPERATIVE

Normal Operation
The PCM sends a signal through circuit VES10 (WH) to the speed control switches, which passes through the clockspring. The signal is grounded by the PCM circuit RES08 (GN/BN) and the clockspring. The stoplamp switch sends a voltage signal through circuit CCB08 (VT/WH) to the PCM when the brake pedal is applied, and deactivates the speed control, if engaged.

Vehicles equipped with a manual transaxle have an additional clutch pedal speed control deactivator switch. The PCM sends a signal to the clutch pedal speed control deactivator switch through circuit CE904 (GN/VT). The clutch pedal speed control deactivator switch, normally closed with the clutch pedal released, routes the signal to ground through circuit GD134 (BK/VT). When the clutch pedal is applied, the clutch pedal speed control deactivator switch moves to the open position causing the PCM to lose the ground signal and deactivate the speed control.

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.

This pinpoint test is intended to diagnose the following:
- PCM not configured for speed control
- Wiring, terminals or connectors
- Clockspring
- Digital transmission range (TR) sensor (automatic transaxle)
- Speed control switches
- Stoplamp switch
- Clutch pedal speed control deactivator switch (manual transaxle)
- Vehicle speed signal concern
- PCM

A1:

A2-A8:

A8-A9:

A10-A12: