System Outline

The cruise control system is a constant vehicle speed controller in which control of the switch on the instrument panel makes it possible to automatically adjust the opening of the engine throttle valve without depressing of the accel. pedal.

1. Set Operation 

   When the cruise control main SW is turned on, the system starts preparations necessary for the cruise control and turns on the indicator light in the combination meter.

2. Set Speed Control 

   When the -SET SW is operated with the cruise control main SW turned on during travelling, the constant vehicle speed is controlled.

3. Coast Control 

   When the -SET SW is kept turned on during cruise control travelling, the engine control module controls the throttle valve to decelerate the vehicle. Every time the -SET SW is turned on instantaneously, the vehicle speed is decelerated approximately 1.5 km/h.

4. Accel Control 

   When the +RES SW is kept turned on during cruise control travelling, the engine control module controls the throttle valve to accelerate the vehicle. Every time the +RES SW is turned on instantaneously, the vehicle speed is accelerated approximately 1.5 km/h.

5. Resume Control 

   When the vehicle speed is within the low speed limit (Approximately 40 km/h, 25 mph) if the cruise control is cancelled, use of the +RES SW accelerates the vehicle to the speed level used before canceling the cruise control.

6. Manual Cancel Mechanism 

   If any of the following signals is input during cruise control travelling, the cruise control is cancelled.

   * The stop light SW is turned on.

   * The CANCEL SW is turned on.

   * The cruise control main SW is turned off.

   * Gear is shifted from D4 position to other positon than D4.

7. Auto Cancel Function 

   If any of the following conditions is encountered, the cruise control is automatically cancelled.

   * The stop light SW wiring is faulty or short-circuited.

   * The vehicle speed signal is faulty.

   * The electronically controlled throttle malfunctions.

8. Overdrive Control Function 

   The overdrive control may be cancelled if the vehicle travels on the slope during cruise control travelling. After the overdrive control has been cancelled, in the case where the throttle angle sensor determines that upslope is finished, the overdrive control mode is activated again after the overdrive return timer.