DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Main Indicator Light Circuit

DESCRIPTION

When the cruise control switch is on, the cruise control indicator light and RADAR READY indicator turn on. These indicators indicate the control condition (the presence or absence of a vehicle in front, vehicle-to-vehicle distance and set vehicle speed) and fail-safe state through the CAN communication system. When there is a malfunction, the master warning light and cruise control indicator light turn on and vehicle-to-vehicle distance information is displayed on the combination meter assembly as the alarm buzzer sounds. Items such as "CLEAN RADAR SENSOR", "CRUISE NOT AVAILABLE", "CHECK CRUISE SYSTEM" and "RADAR READY" are displayed on the multi-information display in the combination meter assembly when the ECM detects signals from each sensor and actuator and sends them to the combination meter assembly via the CAN.

Tech Tips


  • If the vehicle in front in the same lane significantly decreases in speed or another vehicle moves in front of your vehicle, adequate deceleration cannot be applied and the vehicle-to-vehicle distance shortens. At this time, the system sounds the buzzer to warn the driver.

  • Each indicator in the dynamic radar cruise control uses CAN communication. Therefore, if there are any malfunctions in this circuit, check for DTCs in the CAN communication system before troubleshooting this circuit.

INSPECTION PROCEDURE

Note

When the ECM is replaced with a new one, initialization must be performed Click here.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    1. Select the item below in the Active Test, and then check that the cruise control indicator light illuminates Click here.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Indicat. Rader Cruise Cruise control indicator light ON/OFF -
      OK
      Cruise control indicator light turns on/off.

    NG

    GO TO METER / GAUGE SYSTEM Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER


    1. Use the Data List to check if the cruise control switch is functioning properly Click here.

      Radar Cruise
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Main SW M-CPU Cruise control switch (Main CPU) signal / ON or OFF

      ON: Cruise control switch on

      OFF: Cruise control switch off

      		 -
      OK
      On screen, each item changes between ON and OFF according to above chart.
      Result
      Result Proceed to
      OK A
      NG (for 1GR-FE) B
      NG (for 1KD-FTV) C

    B

    REPLACE ECM Click here

    C

    REPLACE ECM Click here

    A

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