CRUISE CONTROL SYSTEM GENERAL


  1. OUTLINE


    1. The cruise control system is controlled by the ECM.

    2. On the models with gasoline engine, the cruise control system effects control through the Electronic Throttle Control System-intelligent (ETCS-i). Once the cruise control system is set to the desired vehicle speed, the throttle valve position is adjusted automatically to maintain the vehicle speed without depressing the accelerator pedal. The ECM compares the actual vehicle speed and the set speed. If the vehicle speed is higher than the set speed, the ECM activates the throttle control motor in the throttle closing direction. If the vehicle speed is lower than the set speed, the ECM activates the throttle motor in the throttle opening direction.

    3. On the models with diesel engine, the cruise control system effects control through the ECD system. Once the cruise control system is set to the desired vehicle speed, the fuel injection volume is adjusted automatically to maintain the vehicle speed without depressing the accelerator pedal. The ECM compares the actual vehicle speed and the set speed. If the vehicle speed is higher than the set speed, the ECM decreases the fuel injection volume by regulating the 4 injectors via the injector driver. If the vehicle speed is lower than the set speed, the ECM increases the fuel injection volume by regulating the 4 injectors via the injector driver.

  2. PRECAUTION


    1. Observe the following precautions when using the cruise control system:


      1. Turn the main switch off when the cruise control system is not being used.

      2. Beware of a possible increase in vehicle speed when driving downhill (if the vehicle speed increases excessively, cancel the cruise control system and shift down to decelerate with the engine brake).

      3. If the cruise main indicator light turns off*1 or illuminates in yellow*2 while the cruise control system is on, first turn the cruise control system off. Then, turn the cruise control system back on. If the cruise main indicator light continues to turns off*1 or illuminates in yellow*2 after performing the above, there may be a malfunction in the system.


        • *1: Models with Optitron display type combination meter assembly

        • *2: Models with analog display type combination meter assembly

    2. Do not use the cruise control system under the following road and vehicle conditions:


      1. Road with heavy traffic

      2. Steep hills

      3. Road with sharp bends

      4. Winding road

      5. Frozen or snowy road

      6. Slippery road surface

      7. Towing trailer