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Home >> Lexus >> 2017 >> IS 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Lighting System (Ext) - Diagnostic Codes & Circuit Tests) >> Lighting System >> DTC B2456: Left Headlight ECU Variation Error [11/2021 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

WARNING: This page does not describe the selected car, but rather 18 other vehicles, including the 2024 Lexus IS 500, 2024 Lexus IS 350, 2024 Lexus IS 300, 2023 Lexus IS 500, and 2023 Lexus IS 350. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

    Refer to REGISTRATION [11/2021 - 09/2022] , or refer to REGISTRATION [09/2022 - ]

  • Before replacing the ECM, refer to Registration.

    Refer to REGISTRATION [11/2021 - 09/2022] , or refer to REGISTRATION [09/2022 - ]

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

    Refer to INITIALIZATION [09/2020 - ]

  • When replacing the headlight ECU sub-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.
    1. *: w/ Automatic Headlight Beam Level Control System
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