Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Left Headlight ECU Variation Error (B2456)

NOTICE:

• Before replacing the main body ECU (multiplex network body ECU), refer to Registration.

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• Before replacing the ECM, refer to Registration.

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• If the No. 1 headlight ECU sub-assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.

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• If the headlight assembly LH has been replaced, it is necessary to synchronize the vehicle information and initialize the No. 1 headlight ECU sub-assembly LH.*

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• When replacing the No. 1 headlight ECU sub-assembly LH, always replace it with a new one. If a No. 1 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.
• When replacing the headlight assembly LH, always replace it with a new one. If a headlight 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.*
  • *: for TMMC Made

Abnormal Height Sensor Data at Initialization (B2452)

DESCRIPTION The No. 1 headlight ECU sub-assembly LH stores this DTC if the value from the rear height control sensor sub-assembly RH is out of range when performing initialization of the No. 1 headlig ...

Control Module Communication Bus Off (U0073,U0100,U0101,U0126,U0129,U0142,U0155)

DESCRIPTION These DTCs are stored if a CAN communication malfunction occurs between the No. 1 headlight ECU sub-assembly LH and other ECUs. DTC No. Detection Item DTC Detection Condition Trou ...

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