DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Main Indicator Light Circuit

DESCRIPTION

When the cruise control switch is on, the CRUISE main indicator light and RADAR*1 or RADAR READY*2 indicator turn on. These lights indicate the control condition (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. The master warning light and CRUISE main indicator light turn on and vehicle-to-vehicle distance information is displayed on the No. 1 meter ECU sub-assembly as the alarm buzzer sounds. Items such as "Clean Radar Sensor", "Cruise Control not available", "Check Cruise Control System" and "Radar Cruise Ready" are displayed in the multi-information display on the No. 1 meter ECU sub-assembly when the driving support ECU detects signals from each sensor and actuator and sends them to the No. 1 meter ECU sub-assembly via the CAN communication line.

Tech Tips

*1: w/ Full-speed following function

*2: w/o Full-speed following function

Tech Tips


  • If the vehicle in front in the same lane significantly decreases vehicle speed or another vehicle moves in front of your vehicle, adequate deceleration cannot be applied and the vehicle-to-vehicle distance will shorten. At this time, the system sounds the buzzer and the master warning light blinks 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.

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CRUISE MAIN INDICATOR LIGHT)


    1. Select the Active Test, use the intelligent tester to generate a control command, and then check that the No. 1 meter ECU sub-assembly operates Click here.

      Combination Meter
      Tester Display Test Part Control Range Diagnostic Note
      Indicat. Lamp Cruise CRUISE main indicator light ON/OFF -
      OK
      CRUISE main indicator light turns on.

    OK

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

    NG

    GO TO METER / GAUGE SYSTEM Click here