System Outline
WARNING: This page is about a different car, the 2002 Toyota Land Cruiser. However, it is still accessible from the selected car via links, so may be relevant.
The cruise control system is a constant vehicle controller which controls the opening angle of the engine throttle valve by the SW, and allows driving at a constant speed without depressing the accelerator pedal.
- Set Operation - When the cruise SW, see Fig 1, is turned on, the system starts preparations for cruise control and turns on the indicator light in the combination meter. See Fig 2.
- Set Speed Control - When the SET/COAST SW, see Fig 3, is operated with the cruise SW turned on during driving, the speed is controlled at a constant speed.
- Coast Control -
When the SET/COAST SW, see Fig 3, is kept turned on during cruise control driving, the engine control module controls the throttle valve to decelerate the vehicle speed.
Every time the SET/COAST SW is turned on instantaneously, the vehicle speed is decelerated approximately 1.5 Km/h.
- Accel Control -
When the RES/ACC SW, see Fig 4, is kept turned on during cruise control driving, the engine control module controls the throttle valve to accelerate the vehicle speed.
Every time the SET/COAST SW is turned on instantaneously, the vehicle speed is accelerated approximately 1.5 Km/h.
- Resume Control - If the vehicle speed is within the low speed limit (Approx. 40 km/h, 25 mph) when cancelling the cruise control, operation of the RES/ACC SW, see Fig 4, accelerates the vehicle speed and resumes the level before cancelling the cruise control.
- Manual Cancelling Mechanism -
If any of the following signals are input during cruise control driving, the cruise control is cancelled.
- The stop light SW is turned on.
- The CANCEL SW is turned on.
- The CRUISE SW is turned off.
- Auto Cancel Function -
If any of the following conditions are detected, the cruise control is cancelled.
- Failure in the stop light SW wiring.
- Abnormality in the vehicle speed signal.
- Malfunction in the electronically controlled throttle parts.
- Overdrive Control Function - The overdrive may be cancelled if the vehicle travels on a upward slope during cruise control driving. After the overdrive is cancelled, if the vehicle speed exceeds the overdrive return speed (Set speed ( 2 km/h, 1.2 mph) ) and it is determined that the slope has finished, and the vehicle returns to overdrive mode again.