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 main switch, 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 vehicle 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 combination meter assembly, make sure to replace it with a new one.

  • 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 (Meter Display 1)


    1. Connect the GTS to the DLC3.

    2. Turn the power 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 GTS.


      Body Electrical > Combination Meter > Active Test
      Tester Display Measurement Item Control Range Diagnostic Note
      Meter Display 1 Multi-information display OFF or All -

      Body Electrical > Combination Meter > Active Test
      Tester Display
      Meter Display 1
      Result
      Result Proceed to
      The multi-information display in the combination meter assembly turns off or all on according to the GTS operation. A
      The multi-information display in the combination meter assembly does not turn off or all on according to the GTS operation. B

    B
    A
  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 main switch is operated, the display changes shown above.
      Result
      Proceed to
      OK
      NG

    OK
    NG