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Home >> Toyota >> 2008 >> Avalon XLS >> Repair and Diagnosis >> Electrical >> Body Electrical >> OEM System Circuits >> Cruise Control System >> System Outline

System Outline

The cruise control system is a constant vehicle speed controller with which it is possible to automatically adjust the opening of the engine throttle valve without depressing the accelerator pedal, but by operating a switch 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 cruise control SW is turned on and the vehicle is being driven, the vehicle will be maintained at the speed at which the - SET SW is released.

  3. Coast Control 

    If the - SET SW is held down while driving with the cruise control active, the engine control module adjusts the throttle valve to gradually and continually decelerate the vehicle. Every time the - SET SW is pressed momentarily, the vehicle will be decelerated approximately 1.6 km/h.

  4. Accel Control 

    If the + RES SW is held down while driving with the cruise control active, the engine control module adjusts the throttle valve to gradually and continually accelerate the vehicle. Every time the + RES SW is pressed momentarily, the vehicle will be 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 has been cancelled, pressing the + RES SW will accelerate the vehicle to the speed which was set before the cruise control was cancelled.

  6. Manual Cancel Mechanism 

    If any of the following signals is received 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.

    * When switching the "D" position circuit in park/neutral position SW from ON to OFF of.

    * When the transmission is shifted from "D" to "N".

  7. Auto Cancel Function 

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

    * Failure in the stop light SW wiring

    * Abnormality in the vehicle speed signal

    * Malfunction in the electronically controlled throttle parts

    * When the vehicle speed gets slower than the low speed limit.

    * When the vehicle speed falls to 16 km/h less than the set speed.

  8. Overdrive Function 

The over-drive may be disabled if the vehicle is climbing a hill while driving with the cruise control active. When the overdrive has been disabled, and the hill climbing has been determined to have finished (from the throttle opening information), the overdrive function will resume automatically after the overdrive timer expires.