Cruise Control: Description and Operation

System Block Diagram:

Component Parts And Function Outline:

CRUISE CONTROL
Cruise control system is engaged by "CRUISE ON OFF" main switch located on steering wheel. 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.

ETS 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, ETS control unit and ETS Motor that connect throttle body.

The cruise control module 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 "CRUISE ON. OFF" push button. Releasing "CRUISE ON. OFF" push button release throttle, clears cruise memory speed, and put vehicle is a non-cruise mode.

Coast/Set switch
COAST.SET switch located on inside of steering wheel 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, Set/Coast 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 no hold Set/Coast 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
RESUME/ACCEL switch located on inside of steering wheel has two positions- "Normal" and "Depressed".

The resume position - With RESUME/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 RESUME/ACCEL switch by constant acceleration.

The accel position - With RESUME/ACCEL switch depressed and held in, disengaging cruise control system, when vehicle has accelerated to required cruise speed releasing RESUME/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 RESUME/ACCEL switch less than 0.5 second. Do not hold RESUME/ACCEL switch is in depressed position. Tap up is a function in which cruise speed can be increased by 1 mph(1.6Km/h).

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