System Outline

The cruise control system is a constant vehicle speed controller which makes it possible to automatically adjust the opening of the engine throttle valve via a switch on the steering wheel, without depressing the accelerator pedal.

1. Set Operation 

   When the ON-OFF 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 while the ON-OFF SW is turned on when driving, the vehicle will be maintained at the current speed.

3. Coast Control 

   When the - SET SW is held down on during cruise control driving, the engine control module adjusts the throttle valve to gradually decelerate the vehicle. Every time the - SET SW is tapped momentarily, the vehicle speed is decelerated by approximately 1.6 km/h. However, in the case of a tap-down operation which puts a difference of more than 5 km/h between the set speed and the actual vehicle speed, the device records the speed when the switch was released and maintains it at that speed constantly.

4. Accel Control 

   When the + SET SW is held down during cruise control driving, the engine control module adjusts the throttle valve to gradually accelerate the vehicle. Every time the + SET SW is tapped momentarily, the vehicle speed is accelerated by approximately 1.6 km/h. However, in the case of tap-up operation which puts a difference of more than a 5 km/h between the set speed and the actual vehicle speed, the device does not change the set speed. (Tap-up operation is not available.)

5. Resume Control 

   If the vehicle speed falls below the low speed limit and the cruise control is cancelled, the preset speed will still be retained in memory. However, the resume control will only be available when the vehicle speed is above the low speed limit.

6. Manual Cancel Mechanism 

   If any of the following signals are input during cruise control driving, the cruise control will be cancelled.

   * The stop lamp SW is turned on. (The brake pedal is depressed)

   * The CANCEL SW is turned on.

   * The ON-OFF SW is turned off.

   * The cruise control clutch SW is turned off. (M/T) (The clutch pedal is depressed)

   * Gear is shifted from position D or 3 to other positions. (A/T)

7. Auto Cancel Function 

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

   * Disconnection and/or short in the stop light SW

   * Malfunction in the vehicle speed signal

   * Malfunction in the electronic throttle parts

   * Malfunction in the stop lamp SW input circuit

   * Malfunction in the cancel circuit

   * The actual vehicle speed falls below the minimum speed limit

   * The actual vehicle speed falls to 16 km/h or more below the set speed

8. Overdrive Control Function 

   The overdrive will sometimes be cut off on hills during cruise control driving. When the hill climbing hills stops, as determined by the throttle opening degree information, control will be reset to the overdrive condition after the overdrive timer has reset. Also, when the overdrive is cut off during accelerator control or resuming control, control is returned to the overdrive condition when the accelerator control and resuming control have finished.