Cruise Control System Description WO/ETC
Cruise control is a speed control system that maintains
a desired vehicle speed under normal driving conditions. Steep grades may
cause variations in the selected speeds.
The cruise control system performs the following functions:
| • | Incrementally raise or lower speeds 1.6 km/h (1 mph) |
The following components are the primary components of the cruise control
system:
| • | The functional control switches |
| • | The cruise control module |
| • | The vehicle speed sensor |
| • | The cruise control release switch |
| • | The stoplamp and torque converter clutch (TCC) switch |
| • | The cruise control switches |
| • | The cruise control switch wiring harnesses |
The cruise control system uses a cruise control module in order to obtain
the desired vehicle cruise operation. The cruise control module is mounted
on the left engine compartment inner side rail. The module contains the electronic
controller and the electric stepper motor. The cruise control module contains
a low speed limit that will prevent system engagement below a minimum speed
of 40 km/h (25 mph). The module is not serviceable. The module
uses the following 2 important components for cruise operation:
| • | An electronic controller |
| - | The controller monitors the vehicle speed. |
| - | The controller operates the electric stepper motor. |
| • | An electric stepper motor |
| - | The electric stepper motor moves a ribbon and the throttle linkage
in order to maintain the desired cruise speed. |
| - | Movement to the ribbon and the throttle linkage is in response
the electronic controller. |
The cruise control operations are located on the multifunction turn
signal lever.
The following cruise control switches disengage the cruise control system:
| • | The release (brake) switch |
| • | The stoplamp and TCC switch |
| • | The clutch switch or the clutch anticipate switch |
These switches are mounted on the following components:
| • | The brake pedal bracket |
| • | The clutch pedal bracket |
When the brake pedal or clutch pedal is depressed, the following actions
occur:
| • | The cruise control system is electrically disengaged. |
| • | The throttle returns to the idle position. |
If the vehicle is equipped with traction control (acceleration slip
regulation), the cruise control will disengage in a low traction situation.
Cruise Control System Description W/ETC
Cruise control is a speed control system that maintains
a desired vehicle speed under normal driving conditions. However, steep grades
may cause variations in the selected speeds. The electronic cruise control
system has the capability to CRUISE, COAST, RESUME SPEED, ACCELERATE, and
TAP-UP or TAP-DOWN.
The main parts of the cruise control system are:
| • | The Throttle Actuator Control (TAC) Module. |
| • | The function control switches. |
| • | The stoplamp switch assembly. |
| • | The cruise release switch assembly. |
| • | The clutch pedal position sensor (CPP) if equipped. |
The cruise control system uses the TAC module to maintain the desired
vehicle cruise speed and operation. The TAC and the powertrain control module
(PCM) communicate together to vary the throttle opening in each different
cruise control mode. The PCM monitors vehicle speed and operates
the throttle actuator. The throttle actuator operates in response to the
TAC module, to maintain the desired cruise speed. The throttle actuator motor
moves the throttle blade. The PCM assembly contains a low speed limit which
will prevent system engagement below a minimum speed of 40 km/h (25 mph).
The TAC or PCM module assemblys are not serviceable.
