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Home >> Lexus >> 2021 >> RC F Base >> Repair and Diagnosis >> Restraints >> Restraints Control Systems >> Pre-Collision System - Diagnostic Codes (2 Of 2) & Circuit Tests >> Pre-Collision System >> DTC U1104: Lost Communication with Driving Support ECU [11/2017 - 03/2019] >> Caution / Notice / Hint
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Caution / Notice / Hint

NOTE:
  • When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
  • When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
  • If the forward recognition camera has been replaced with a new one, be sure to perform forward recognition camera adjustment.

    Refer to ADJUSTMENT (SEQUENTIAL RECOGNITION) [11/2017 - 01/2023]

  • When replacing the millimeter wave radar sensor assembly, always replace it with a new one. If a millimeter wave radar sensor assembly which was installed to another vehicle is used, the information stored in the millimeter wave radar sensor assembly will not match the information from the vehicle. As a result, a DTC may be stored.
  • When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.

    Refer to ADJUSTMENT [11/2017 - 03/2019]

  • Confirm that the connectors are securely connected, as a partially connected connector can cause this DTC to be stored.
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