The cruise control system consists of the following main
components:
| | The CRUISE switch is 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 |
| | The cruise control module is located in the engine compartment. |
| | The brake pedal is mounted stoplamp/BTSI switch. |
Cruise Control Module
The following components are contained in the cruise control module:
| • | 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.
ABS/TCC Switch and Stoplamp/BTSI Switch
The ABS/TCC switch and stoplamp switch are provided in order to disengage
the cruise control. 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 (part 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, causing the
throttle to return to the idle position.
Vehicle Speed Sensor (VSS)
The vehicle speed sensor (VSS), produces an AC signal. The VSS signal
is proportional to the speed of the vehicle.
The VSS provides the speed signal to the powertrain control module (PCM).
The PCM converts the signal. The PCM provides the converted VSS output
signal to the cruise control module and to the instrument cluster.
