Section 295 (Cruise Control Systems): Description

WARNING: This page is about a different car, the 2003 Toyota 4Runner. However, it is still accessible from the selected car via links, so may be relevant.

WARNING: Vehicle is equipped with Supplemental Inflatable Restraint (SIR) system. When servicing vehicle, use care to avoid accidental air bag deployment. SIR system related components are located in various locations throughout interior and exterior of vehicle, depending on application. Do not use electrical test equipment on or near these circuits. Before attempting ANY repairs involving steering column, instrument panel or related components, or If necessary, deactivate SIR system before servicing components. See AIR BAG SAFETY PRECAUTIONS and DISABLING & ACTIVATING AIR BAG SYSTEM in AIR BAG RESTRAINT SYSTEMS article in RESTRAINTS.

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.

Set Operation :
When the ON-OFF SW is turned on, the system starts indicator light in the combination meter.
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
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.
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.
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.
Manual Cancel Mechanism :
If any of the following signals is input during cruise, the cruise control is cancelled.
- The stop light SW is turned on.
- The CANCEL SW is turned on.
- The ON-OFF SW is turned off.
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.
Overdrive Control Function
Overdrive is sometimes cut off on gradients during cruise control driving. When end of climbing gradient is determined by throttle opening degree information after overdrive is canceled, control is reset to overdrive condition after overdrive resetting timer operation. Also, when overdrive is cut off during accelerator resuming control, control is reset to overdrive condition when accelerator resuming control is finished.