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Home >> Lexus >> 2016 >> GS F >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Lin Communication System (Diagnostic Codes & Symptom Tests) >> Lin Communication System >> DTC U0242: Lost Communication With Headlamp Control Module "B" [10/2015 - ] >> Procedure

DTC U0242: Lost Communication With Headlamp Control Module "B" [10/2015 - ]: Procedure

  1. CLEAR DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

      Body Electrical > AFS > Clear DTCs 

      Result

      Proceed to
      NEXT

    Result: 

    NEXT 

    See step  2

  2. CHECK FOR DTC 
    1. Turn the engine switch on (IG).
    2. Inspect the light using the dimmer switch.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2015 - ]

      Body Electrical > AFS > Trouble Codes 

      Result

      Result Proceed to
      DTC U0242 is not output A
      DTC U0242 is output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - 09/2016]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2016 - 09/2017]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2017 - ] 

    Result: 

    GO TO LIGHTING SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2015 - ]