System Outline

The cruise control system is a constant vehicle speed controller in which it is possible to automatically adjust the opening of the engine throttle valve without depressing the accelerator pedal, but by operating a switch on the instrument panel instead.

1. Set Operation 

   When the ON-OFF SW is turned on, the system begins the 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 pressed while the ON-OFF SW is turned on and the vehicle is currently being driven, the vehicle will be controlled to maintain the current speed.

3. Coast Control 

   When the - SET SW is held down while driving with the cruise control active, the hybrid vehicle control ECU controls the throttle valve to gradually and continuously decelerate the vehicle. Also, every time the - SET SW is pressed momentarily, the vehicle speed is decelerated approximately 1.6 km/h.

4. Accel Control 

   When the + RES SW is held down while driving with the cruise control active, the hybrid vehicle control ECU controls the throttle valve to gradually and continuously accelerate the vehicle. Also, every time the + RES SW is pressed momentarily, the vehicle speed is accelerated approximately 1.6 km/h.

5. Resume Control 

   If the vehicle speed is above the low speed limit (Approximately 40 km/h, 25 mph) and the cruise control is cancelled, pressing the + RES SW will cause the cruise control to accelerate the vehicle back to the speed which it was set at before the cruise control was cancelled.

6. Manual Cancel Mechanism 

   If any of the following signals is input while driving with the cruise control active, the cruise control will be cancelled.

   * The stop light SW is turned on.

   * The CANCEL SW is turned on.

   * The ON-OFF SW is turned off.

7. Auto Cancel Function 

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

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

   * The vehicle speed signal is faulty.

   * The electronically controlled throttle malfunctions.