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Home >> Toyota >> 2021 >> Highlander LE, 4WD >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting System (W/ AFS) - Diagnostic Codes (1 Of 2) >> LIGHTING SYSTEM (w/ AFS) >> DTC B242C: Right Headlight ECU Malfunction; DTC B242D: Left Headlight ECU Malfunction [12/2019 - 11/2023] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • If the headlight ECU sub-assembly LH or headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the headlight ECU sub-assembly LH.

    Refer to INITIALIZATION [12/2019 - 11/2023]

  • When replacing the headlight ECU sub-assembly LH or headlight assembly LH, always replace it with a new one. If a headlight ECU sub-assembly LH which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.
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