Cruise Control System Description

The cruise control system consists of the following main components:
^ The CRUISE switch located on the multifunction lever. The CRUISE switch includes the SET button, the ON/OFF switch and the R/A switch.
^ The cruise control module located in the engine compartment
^ A vehicle speed sensor
^ The brake pedal mounted ABS/TCC switch (cruise control release switch)
^ The brake pedal mounted stoplamp/BTSI switch

Cruise Control Module
The following components are contained in the cruise control module:
^ An electric controller
^ An electric stepper motor

The controller performs the following functions:
^ Monitors the vehicle speed
^ Operates the electric motor

In response to the controller, the motor moves a connecting strap that attaches to the cruise control cable. The cable moves the throttle linkage in order to vary the throttle position in order to maintain the desired cruise speed. The cruise control module contains a low speed limit which prevents the system engagement below a minimum speed of approximately 40 km/h (25 mph). The module is controlled by switches located on the multifunction lever. The cruise control is in the standby disabled mode until all of the conditions that are inconsistent with the cruise control operation are cleared.

The cruise control module is mounted on the cowl. The module is not serviceable.

ABS/TCC Switch and Stoplamp/BTSI Switch
The ABS/TCC switch (cruise release switch) and stoplamp switch are provided in order to disengage the cruise control. The switches are mounted on the brake pedal bracket assembly. Each switch consists of 2 switch contacts. The normally-closed TCC switch (part of the ABS/TCC switch) opens when the brake pedal is pressed, and closes when the pedal is released. The normally-open stoplamp switch (pant of the stoplamp/BTSI switch) closes when the brake pedal is pressed, and opens when the pedal is released.

Pressing the brake pedal disengages the cruise control. This causes the throttle to return to the idle position.

Vehicle Speed Sensor (VSS)
The vehicle speed sensor (VSS), mounted to the automatic transaxle, produces an AC signal. The frequency of the VSS signal is proportional to the speed at which the automatic transaxle output shaft rotates. This shaft speed is proportional to the speed of the vehicle.

The VSS provides the speed signal to the powertrain control module (PCM) at a rate of 4000 pulses per mile. The PCM converts the number of pulses per mile per second in order to determine the vehicle speed. The PCM provides the converted VSS output signal to the cruise control module and to the instrument cluster speedometer.