Cruise Control: Description and Operation
The speed control system consists of:^ Speed control servo.
^ Speed control actuator cable.
^ Vehicle Speed Sensor (VSS).
^ Horn relay.
^ Speed control actuator switch..
^ Stoplight switch.
^ Speed control deactivate switch.
^ CRUISE on indicator lamp.
The system operates independent of engine vacuum, therefore no vacuum lines are required.
The speed control servo:
^ Is mounted in the engine compartment on the LH shock tower.
^ Is connected to the throttle body with the speed control actuator cable.
The electronics are integrated into the speed control servo, eliminating the need for any other speed control electronic modules in the vehicle.
The speed control actuator switch assembly:
^ Is mounted in the steering wheel and consists of:
- LH buttons (ON, OFF).
- RH buttons (RESUME, SET ACCEL, COAST).
- Necessary wiring.
The vehicle speed sensor:
^ Is mounted to the transaxle.
^ Is a magnetic pickup driven by a gear, which is driven by the transaxle.
The VSS signal sent to the speed control servo is proportional to vehicle speed.
The air bag sliding contact:
^ Is located at the center of the steering wheel.
^ Transfers electrical signals to the steering column wiring for the following:
- Driver side air bag module
- Horn blow switch
- Speed control actuator switch
The stoplight switch is a normally open switch that closes when the brake pedal is applied.
^ An electrical signal is then sent to the speed control servo and the speed control system is disengaged.
^ When the brake pedal is released, the circuit to the stoplamps opens and the stoplight switch returns to its open position.
The speed control deactivate switch:
^ Is a normally closed switch that replaces the speed control dump valve as a redundant safety feature in the system.
^ Works independently of the stoplight circuit to remove power to the speed control servo, releasing the throttle from servo control under increased brake pedal efforts (22-44 N engine running).
^ Is attached to the brake pedal support.
^ Has a plunger attached to the brake pedal arm.
^ Is self-adjusting.