General Description

Cruise control is a speed control system that maintains a desired vehicle speed under normal driving conditions. However, steep grades up or down may cause variations in the selected speeds. The electronic cruise control system has the capability to CRUISE, COAST, RESUME SPEED, ACCELERATOR, and TAP-UP or TAP-DOWN.

The main parts of the cruise control system are the functional control switches, cruise control module assembly, vehicle speed sensor, cruise control release switch, and stoplamp switch assemblies. The cruise control system uses a cruise control module assembly to obtain the desired vehicle cruise operation. Two important components in the module assembly help to do this. The first is an electronic controller and the second is an electric stepper motor. The electric controller monitors vehicle speed and operates the electric stepper motor. The electric stepper motor moves a band and throttle linkage, in response to the electronic controller, to maintain the desired cruise speed. The cruise control module assembly contains a low speed limit which will prevent system engagement below a minimum speed of 40 km/h (25 mph). The operation of the electronic controller is controlled by functional control switches located on the multifunction turn signal lever.

Cruise control release switch and stoplamp switch assemblies are provided to disengage the cruise control. The switch assemblies are mounted on the brake pedal bracket assembly. When the brake pedal assembly is depressed, the cruise control is electrically disengaged and the throttle is returned to the idle position.