SPEED LIMITER SYSTEM CONTROL CRUISE CONTROL

  1. FUNCTION OF MAIN COMPONENTS

    Component

    Function

    Speed Limiter Switch (Cruise Control Switch)

    ON-OFF Button

    Turns the speed limiter control system on and off.

    CANCEL Switch

    Cancels speed limit control.

    RES/+ Switch

    Increases the limit speed or resumes a preset limit speed.

    SET/- Switch

    Decreases the limit speed or sets the current speed as the limit speed.

    ECM

    • Controls the speed limiter system in accordance with signals from the switches and sensors.

    • If the ECM detects a malfunction in the speed limiter system, it will store Diagnostic Trouble Codes (DTCs).

    Combination Meter Assembly

    Speed Limiter Indicator Light

    • Illuminates in green when the speed limiter system is turned on using the ON-OFF button on the speed limiter switch (cruise control switch.)

    • Illuminates in yellow if a malfunction is detected in the speed limiter system.

    Multi-information Display

    Displays the limit speed when a limit speed is set.

    Multi Buzzer

    Sounds when the vehicle speed exceeds the set limit speed.

    Throttle Body with Motor Assembly

    Throttle Control Motor

    Adjusts the throttle valve opening angle in accordance with signals from the ECM.

    Throttle Position Sensor

    Detects the throttle valve opening angle and sends it to the ECM.

    Brake Actuator Assembly

    Skid Control ECU

    Sends the vehicle speed signal to the ECM.

    Speed Sensors

    Detects the wheel speed of each of the 4 wheels.

    Accelerator Pedal Sensor Assembly

    Detects when the accelerator pedal is depressed, whether the depression of the accelerator pedal has exceeded the threshold to enter kick down mode and sends signals to the ECM.

    Clutch Upper Switch (Clutch Start Switch Assembly)

    Detects when the clutch pedal is depressed and sends a signal to the ECM.

  2. FUNCTION

    Function

    Outline

    Set Control

    When the speed limiter switch (cruise control switch) is pressed in the SET/"-" direction, the system memorizes the current vehicle speed as a limit speed, and the limit speed is displayed on the combination meter assembly. If the vehicle speed is lower than 30 km/h (20 mph) when the switch is operated, the desired maximum speed will be set at 30 km/h (20 mph).

    Constant Speed Control

    When the speed limiter system is on, the ECM compares the actual vehicle speed with the limit speed. If the actual vehicle speed is higher than the limit speed, the ECM will control the throttle control motor, reducing the actual vehicle speed to the limit speed.

    Coast Control

    If the driver continues to press the speed limiter switch (cruise control switch) in the ''-'' direction, direction, the system will reduce the limit speed in 5 km/h or 5 mph increments. The instant the driver releases the adjustable speed limiter switch (cruise control switch), that speed will be set as the limit speed.

    Tap-down Control

    If the driver presses the speed limiter switch (cruise control switch) momentarily (for approximately 0.5 seconds) in the ''-'' direction, the system will reduce the limit speed by 1 km/h or 1 mph with each press of the switch.

    Accelerator Control

    If the driver continues to press the speed limiter switch (cruise control switch) in the ''+'' direction, the system will increase the limit speed in 5 km/h or 5 mph increments. The instant the driver releases the speed limiter switch (cruise control switch), that speed will be set as the limit speed.

    Tap-up Control

    If the driver presses the speed limiter switch (cruise control switch) momentarily (for approximately 0.5 seconds) in the ''+'' direction, the system will increase the limit speed by 1 km/h or 1 mph with each press of the switch.

    Override Control

    While the vehicle is being driven with the speed limiter system on, if the driver fully depresses the accelerator pedal, the ECM will detect that the accelerator pedal position sensor has exceeded the threshold to enter kick down mode. In this case, the ECM will recognize the drivers intent to accelerate quickly and will allow the vehicle to accelerate higher than the limit speed. After the acceleration, when the vehicle speed falls below the limit speed, this function will resume limit speed control.

    Cancel Control

    While the vehicle is being driven with the speed limiter system on, if either of the following signals is sent to the ECM, the system will cancel operation of the speed limiter system:

    • CANCEL switch on signal (the driver has pressed the speed limiter switch (cruise control switch) in the CANCEL direction)

    • Speed limiter switch (cruise control switch) off signal

    Resume Control

    After canceling speed limiter control using the speed limiter switch (cruise control switch), if the driver pushes the speed limiter switch (cruise control switch), in the ''+'' direction, the system will resume speed limit control at the limit speed that was set at the time of cancelation.

  3. DIAGNOSIS

    1. If a malfunction occurs in the speed limiter system during speed limit control operation, the ECM automatically cancels control and illuminates the speed limiter indicator light in yellow. At this time, the ECM stores the malfunction in the form of a Diagnostic Trouble Code (DTC).

    2. The DTC can be read by connecting the Global TechStream (GTS) to the DLC3. For details, refer to the Repair Manual.