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Home >> Lexus >> 2007 >> LS 460L >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Air Conditioning >> Air Conditioning System >> DTC B1499/99 Multiplex Communication Circuit >> Inspection Procedure

Inspection Procedure

  1. CHECK DTC 
    1. Clear the DTC (see DTC CHECK / CLEAR  ).
    2. Check for the DTC (see DTC CHECK / CLEAR  ).

      Result 

      RESULT CHART

      Result Proceed to
      DTC B1499/99 is output A
      DTC B1499/99 is not output B

    B: USE SIMULATION METHOD TO CHECK  (See HOW TO PROCEED WITH TROUBLESHOOTING )

    A: GO TO NEXT STEP 

    GO TO CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

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