Cruise Control: Description and Operation

Speed Control

The vehicle speed control system consists of the following components:

- Stoplamp switch
- Speed control deactivator switch (integral to the stoplamp switch on gasoline engines)
- Speed control deactivator switch (diesel engines)
- PCM
- Speed control switches
- CHMSL
- BOO resistor (cutaway vehicles)

The speed control system is controlled by the PCM. The speed control system is designed to maintain a selected vehicle speed between 40 km/h (25 mph) and the maximum limited vehicle speed. The speed control system is controlled by the steering wheel mounted switches (ON, OFF, SET/ACCEL, COAST, RESUME), the brake pedal switches (stoplamp and speed control deactivator switches) and brake pressure switch (diesel engine). The steering wheel mounted switches are hardwired to the PCM.

The speed control functions include:

- Turning on the speed control system
- Setting and maintaining the desired vehicle speed
- Accelerating the vehicle to a higher speed
- Decelerating to a lower speed
- Tapping-up/tapping-down the vehicle speed
- Deactivating the vehicle speed control system
- Resuming the prior vehicle speed
- Turning off the vehicle speed control system