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Home >> Toyota >> 2021 >> Avalon TRD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Front Camera System - Diagnostic Codes (Except Hybrid) >> FRONT CAMERA SYSTEM (for Gasoline Model) >> DTC U0100: Lost Communication with ECM/PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B" [04/2018 - 08/2021] >> Procedure
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DTC U0100: Lost Communication with ECM/PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0123: Lost Communication with Yaw Rate Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B" [04/2018 - 08/2021]: Procedure

  1. CHECK FOR DTCs 
    1. Clear the DTCs.

      Chassis > Front Recognition Camera > Clear DTCs 

    2. Make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    3. Check for DTCs.

      Chassis > Front Recognition Camera > Trouble Codes 

      Result

      Result Proceed to
      DTC U0100, U0101, U0123, U0129 and U0142 are not output A
      DTC U0100, U0101, U0123, U0129 or U0142 is output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ] 

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2018 - ]