DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Main Indicator Light Circuit

DESCRIPTION

When the dynamic radar cruise control system is turned on using the cruise control switch (ON-OFF button), the cruise control indicator (vehicle-to-vehicle distance control mode) illuminates. The driving support ECU assembly uses this and other indicators to indicate the control condition (presence or absence of a preceding vehicle, vehicle-to-vehicle distance, and set speed) and fail-safe state via CAN communication.

Tech Tips

If the vehicle in front in the same lane significantly decreases vehicle speed or another vehicle moves in front of this vehicle, adequate deceleration cannot be applied by the cruise control system and the vehicle-to-vehicle distance will become shorter. At this time, the system sounds the buzzer to warn the driver. The indicators for the dynamic radar cruise control system use CAN for communication. Therefore, if there are any indicator malfunctions, check for DTCs in the CAN communication system before troubleshooting this circuit.

CAUTION / NOTICE / HINT

Note

When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.

PROCEDURE


  1. PERFORM ACTIVE TEST USING GTS (INDICAT. LAMP CRUISE AND INDICAT. RADAR CRUISE)


    1. Connect the GTS to the DLC3.

    2. Turn the engine switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

    5. Perform "Active Test" according to the display on the GTS.


      Body Electrical > Combination Meter > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Indicat. Lamp Cruise Cruise control indicator ON or OFF -
      Indicat. Radar Cruise Radar cruise control indicator ON or OFF -

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Indicat. Lamp Cruise

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Indicat. Radar Cruise
      OK
      The cruise control indicator and radar cruise control indicator comes on or goes off.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO METER / GAUGE SYSTEM Click here

    OK

  2. READ VALUE USING GTS (CCS MAIN SW-READY)


    1. Enter the following menus: Powertrain / Radar Cruise / Data List.

    2. Read the Data List according to the display on the GTS.


      Powertrain > Radar Cruise > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      CCS Main SW-Ready Dynamic radar cruise control system standby condition ON or OFF

      ON: Dynamic radar cruise control system standby

      OFF: Dynamic radar cruise control system not standby

      		 -

      Powertrain > Radar Cruise > Data List
      Tester Display
      CCS Main SW-Ready
      OK
      When the cruise control switch (ON/OFF button) is operated, the display changes as shown above.
      Result
      Proceed to
      OK
      NG

    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Click here

    NG

    REPLACE DRIVING SUPPORT ECU ASSEMBLY Click here