DYNAMIC RADAR CRUISE CONTROL SYSTEM > Cruise Main Indicator Light Circuit

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DESCRIPTION

When the cruise control switch is turned on, the cruise control indicator light (vehicle-to-vehicle distance control mode) and "RADAR READY" indicator come on. This indicates 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 control indicator light come 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 CONTROL NOT AVAILABLE", "CHECK CRUISE CONTROL SYSTEM", "ADJUSTING FRONT RADAR BEAM" and "RADAR READY" are displayed on the multi-information display on the combination meter assembly when the driving support ECU assembly detects signals from each sensor, and actuator and sends them to the combination meter assembly via CAN.

HINT:
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 by the cruise control system 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 for communication. Therefore, if there are any malfunctions in this circuit, check for DTCs in the CAN communication system before troubleshooting this circuit.


WIRING DIAGRAM


E187973E19


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER

  1. Connect the to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. Check the cruise control indicator light by performing Active Test.

    Combination Meter 
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Indicat. Lamp Cruise
    		Cruise control indicator light
    (Constant speed control mode)
    		OFF or ON
    		Confirm that the vehicle is stopped with engine idling
    Indicat. Radar Cruise
    		Cruise control indicator light
    (Vehicle-to-vehicle distance control mode)
    		OFF or ON
    		Confirm that the vehicle is stopped with engine idling

    OK:
    The display changes in accordance with Active Test operation.



NG
REPLACE COMBINATION METER ASSEMBLY (Click here)
OK


2.READ VALUE USING INTELLIGENT TESTER

  1. Connect the to the DLC3.

  1. Turn the power switch on (IG).

  1. Turn the intelligent tester on.

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

  1. Check the Data List to confirm function of the cruise control indicator light.

    Radar Cruise 
    Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Cruise Control Main Switch
    		Cruise control switch signal/ON or OFF
    		ON: Cruise control switch on
    OFF: Cruise control switch off
    		-

    OK:
    The display changes in accordance with switch operation.



NG
REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)
OK

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