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Home >> Lexus >> 2008 >> GS 460 >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Cruise Control >> Dynamic Radar Cruise Control System >> Cruise Main Indicator Light Circuit >> Inspection Procedure

Inspection Procedure

  1. PERFORM ACTIVE TEST USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    5. Check the CRUISE main indicator light by performing the Active Test.

      Combination Meter: 

      TESTER DISPLAY REFERENCE CHART

      Tester Display Test Part Control Range Diagnostic Note
      Indicat. Lamp Cruise Turns CRUISE main indicator light ON / OFF -

      OK: 

      Indicator light comes on/goes off. 

    NG :  GO TO COMBINATION METER SYSTEM

    OK : Go to next step. 

  2. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Radar Cruise / Data List.
    5. Check the Data List for proper functioning of the CRUISE main indicator light.

      ECM (Radar Cruise): 

      MEASUREMENT ITEM/RANGE CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      CCS Ready M-CPU Cruise control system standby condition (Main CPU) / ON or OFF Each time main switch is pushed, ON/OFF changes A
      CCS Indicator M-CPU Cruise indicator signal (Main CPU) / ON or OFF ON : "CRUISE" on
      OFF: "CRUISE" off
      B

      OK: 

      When the cruise control main switch operation is performed, the result will be same as above. 

      HINT:

      A is OK, but B is NG → DTC output or ECM failure

    NG : REPLACE ECM 

    OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE