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Home >> Lexus >> 2008 >> IS 350 >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting >> Lighting System >> AFS OFF Switch Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK MULTIPLEX COMMUNICATION SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING  .

    If the multiplex communication system is operating normally, proceed to the next step.

  2. PERFORM ACTIVE TEST BY 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 operation.

      Combination Meter: 

      DIAGNOSTIC NOTE

      Tester Display Test Part Control Range Diagnostic Note
      Indicat. AFS AFS OFF indicator light ON / OFF -

      OK: 

      AFS OFF indicator comes on. 

    NG: COMBINATION METER SYSTEM

    OK: Go to Next Step 

  3. READ VALUE OF TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Turn the clearance sonar main switch on.
    5. Enter the following menus: Body Electrical / AFS / Data List.
    6. Read the display on the Techstream.

      AFS (AFS ECU): 

      DIAGNOSTIC NOTE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      AFS OFF Switch AFS setting / ON or OFF ON: AFS OFF
      OFF: AFS ON
      -

      OK: 

      Normal conditions listed above are displayed. 

    OK: REPLACE AFS ECU 

    NG: Go to Next Step 

  4. CHECK SATELLITE SWITCH 
    1. Check the operation speed of the satellite switch and the tach indicator system.

      OK: 

      Tach indicator system operates normally. 

    NG: COMBINATION METER SYSTEM

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