Cruise Control: Description and Operation

System Block Diagram:

SYSTEM BLOCK DIAGRAM

Component Parts And Function Outline:

COMPONENT PARTS AND FUNCTION OUTLINE

CRUISE CONTROL
Cruise control system is engaged by "ON. OFF" main switch located on right of steering wheel column. System has the capability to cruise, coast, resume speed, and accelerate, and raise "tap-up" or lower "tap-down" set speed.
It also has a safety interrupt, engaged upon depressing brake or shifting select lever.

ECM is a speed control system that maintains a required vehicle speed at normal driving conditions.
The main components of cruise control system are mode control switches, transaxle range switch, brake switch, vehicle speed sensor, ECM and ETS motor that connect throttle body.

ECM contains a low speed limit which will prevent system engagement below a minimum speed of 40 km/h (25 mph). The operation of the controller is controlled by mode control switches located on steering wheel.

Transaxle range switch and brake switch are provided to disengage the cruise control system. The switches are on brake pedal bracket and transaxle. When the brake pedal depressed or select lever shifted, the cruise control system is electrically disengaged and the throttle is returned to the idle position.

Cruise main switch
Cruise control system is engaged by pressing "ON. OFF" push button. Releasing "0N.OFF" push button release throttle, clears cruise memory speed, and puts vehicle is a non-cruise mode.

Coast/Set switch
COAST.SET switch located on right of steering wheel column has two positions - "Normal" and "Depressed". The set position - With COAST.SET switch depressed and then release the cruise speed will be set at the speed the vehicle was going when COAST.SET switch was released. The coast position - With COAST.SET switch fully depressed, driver can lower cruise speed. To decrease cruise speed, COAST.SET switch is held in, disengaging cruise control system. When vehicle has slowed to required cruise speed, releasing COAST.SET switch will re-engage speed at new selected speed.
The tap down - To lower vehicle speed, cruise must be engaged and operating. Tap down is done by quickly pressing and releasing COAST.SET switch. Do not hold COAST.SET switch in depressed position.
Tap down is a function in which cruise speed car be decreased by 1 mph (1.6 km/h)

Resume/Accel switch
RES.ACCEL switch located on right of steering wheel column has two positions - "Normal" and "Depressed".

The resume position - With RES.ACCEL switch depressed and then release, this switch also returns cruise control operation to last speed (Which is temporarily disengaged by Cancel switch or Brake pedal), setting when momentarily operating RES.ACCEL switch by constant acceleration.

The accel position - With RES.ACCEL switch depressed and held in, disengaging cruise control system, when vehicle has accelerated to required cruise speed, releasing RES.ACCEL switch will re-engage speed at new selected speed.

The tap up - To increase vehicle speed, the cruise must be engaged and operating.
Tap up is done by quickly pressing and releasing RES ACCEL switch less than 0.5 second. Do not hold RES.ACCEL switch is in depressed position. Tap up is a function in which cruise speed can be increased by 1 mph (1.6 km/h).

Cancel switch
Cruise control system is temporarily disengaged by pressing "CANCEL" switch.
Cruise speed canceled by this switch will be recover by RES.ACCEL switch.