Cruise Control: Description and Operation

The cruise control system is a constant vehicle speed controller which allows automatic speed control by the switches on the instrumental panel. The opening angle of the engine throttle valve is controlled without depressing the accel pedal.

1. SET OPERATION
When the CRUISE 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/COAST SW is operated with the CRUISE SW turned ON during travelling, the constant vehicle speed is controlled.

3. COAST CONTROL
When the SET/COAST 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/COAST SW is turned ON instantaneously, the vehicle speed is decelerated approximately 1.5 kph.

4. ACCEL CONTROL
When the RESUME/ACCEL SW is kept turned ON during cruise control travelling, the engine control module controls the throttle valve to accelerate the vehicle. Every time the RESUME/ACCEL SW is turned ON instantaneously, the vehicle speed is accelerated approximately 1.5 kph.

5. RESUME CONTROL
When the vehicle speed is within the low speed limit (Approximately 40 kph, 25 mph) if the cruise control is cancelled, use of the RESUME/ACCEL 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 SW is turned OFF.
* The VSC is activated.

7. AUTO CANCEL FUNCTION
If any of the following conditions are detected, the cruise control is automatically cancelled.
* Failure in the stop light SW wiring
* Failure in the vehicle speed signal
* Malfunction in the electronically controlled throttle.

8. OVERDRIVE CONTROL FUNCTION
The overdrive control may be cancelled if the vehicle travels on a slope during cruise control travelling. After the overdrive control has been cancelled, if the vehicle speed exceeds the overdrive return speed (The set speed is 2 kph, 1.2 mph) and it is decided that the slope has finished, the vehicle returns to the overdrive control mode again.