CRUISE CONTROL SYSTEM SYSTEM DESCRIPTION


  1. CRUISE CONTROL SYSTEM

    The cruise control system maintains constant vehicle speed. It enables the driver to adjust the vehicle speed by operating the cruise control switch without using the accelerator pedal.

    The power management control ECU receivers signals from each switch and sensor, and maintains constant vehicle speed by optimizing the use of the engine and motor driving force.


    • The power management control ECU receives signals such as ON-OFF, - SET, + RES, and CANCEL from the cruise control switch and executes the command.

    • A003SIME01
      Text in Illustration
      *1 Cruise Control Indicator

      The power management control ECU illuminates the combination meter's cruise control indicator when it receives a cruise control switch (ON-OFF button) ON signal.

    • The power management control ECU cancels cruise control operation when the brake pedal is depressed and the power management control ECU receives a stop light switch signal.

    • The power management control ECU cancels cruise control operation when the shift lever is moved from D to other, and the power management control ECU receives a shift position sensor signal.

  2. LIMIT CONTROL


    1. Low speed limit

      The lowest possible limit of the speed setting range is set at approximately 40 km/h (25 mph). The cruise control system cannot be set when the vehicle speed is below the low speed limit. Cruise control operation will be automatically canceled but the stored vehicle speed will be retained when the vehicle speed drops below the low speed limit of 40 km/h (25 mph) while the cruise control is in operation.

    2. High speed limit

      The highest possible limit of the speed setting range is set at approximately 200 km/h (125 mph). The cruise control system cannot be set when the driving vehicle speed is over the high speed limit. Also, + RES cannot be used to increase speed over the high speed limit.

  3. CRUISE CONTROL OPERATION

    The cruise control switch operates 7 functions: SET, -, TAP-DOWN, RES, +, TAP-UP, and CANCEL. The SET, TAP-DOWN, and - functions, and the RES, TAP-UP, and + functions are operated with the same switch. The cruise control switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after releasing it.


    1. SET CONTROL

      Vehicle speed is stored and constant speed control is maintained when pushing the cruise control switch to - SET while driving with the main switch on (the cruise control indicator come on), and the vehicle speed is within the set speed range (between the low and high speed limits).

    2. - CONTROL

      The power management control ECU decreases the cruise control demand speed and controls the engine and motor driving force to decelerate the vehicle when - SET on the cruise control switch is pressed and held while the cruise control system is in operation. When the cruise control switch is released from - SET, vehicle speed is stored and constant speed control is maintained.

    3. TAP-DOWN CONTROL

      When tapping down the cruise control switch to - SET (for approximately 0.6 seconds) while the cruise control system is in operation, the stored vehicle speed decreases each time by approximately 1.6 km/h (1 mph). When the cruise control switch is released from - SET and the difference between the driving and stored vehicle speeds is more than 5 km/h (3 mph), the driving vehicle speed is stored and constant speed control is maintained.

    4. + CONTROL

      The power management control ECU increases the cruise control demand speed and controls the engine and motor driving force to accelerate the vehicle when + RES on the cruise control switch is pressed and held while the cruise control system is in operation.

      When the cruise control switch is released from + RES, vehicle speed is stored and constant speed control is maintained.

    5. TAP-UP CONTROL

      When tapping up the cruise control switch to + RES (for approximately 0.6 seconds) while the cruise control system is in operation, the stored vehicle speed increases each time by approximately 1.6 km/h (1 mph). However, when the difference between the driving and the stored vehicle speeds is more than 5 km/h (3 mph), the stored vehicle speed will not be changed.

    6. RES CONTROL

      If cruise control operation was canceled with the stop light switch assembly or the CANCEL switch, and if driving speed is within the limit range, pushing the cruise control switch to + RES restores vehicle speed memorized at the time of cancellation, and maintains constant speed control.

    7. MANUAL CANCEL CONTROL

      Performing any of the following cancels the cruise control system while it is operating (the stored vehicle speed in the ECM is maintained).


      • Depressing the brake pedal

      • Moving the shift lever from D to other

      • Pushing the cruise control switch to CANCEL

      • Turning the cruise control switch (ON-OFF button) off (the stored vehicle speed in the ECM is not maintained)

  4. AUTO CANCEL (FAIL-SAFE)

    This system has an automatic cancellation function (fail-safe) Click here.