Circuit Operation

The cruise control system maintains a determined vehicle speed under normal driving conditions. However, steep grades up or down may cause slight variations in the desired speed. This cruise control system has the capability to maintain, coast, accelerate and resume speed.

The Cruise Control Actuator is the main component that allows the system to control and maintain the desired vehicle speed. The Cruise Control Actuator monitors vehicle speed through the Vehicle Speed Sensor (VSS) which maintains or changes vehicle speed in response to the input from the Cruise Control Mode Switch.

A DC servo motor is located inside the actuator which turns a worm gear, in turn this moves the accelerator cable to adjust throttle angle. The DC servo motor and the worm gear are mechanically connected only when the magnetic clutch is energized.

Cruise control operation is disengaged when the Cruise Control Actuator receives a cancel signal from the Stoplamp Switch, the Cruise Control On/Off Switch, the Cruise Control Mode Switch, the Transmission Range Switch/Park Neutral Position (PNP) Switch (Automatic Transmission) or the Clutch Pedal Position (CPP) Interrupt Switch (Manual Transmission). When a cancel signal is received, the Cruise Control Actuator will de-energize the magnetic clutch inside. This will disconnect the DC servo motor from the worm gear and allow the throttle to return to its idle position.