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Home >> Lexus >> 2019 >> UX 250h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> ASC System (Diagnostic Codes & Circuit Tests) >> ASC System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0293: Lost Communication With Hybrid Powertrain Control Module [10/2018 - 07/2022] >> Procedure
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0122: Lost Communication With Vehicle Dynamics Control Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0293: Lost Communication With Hybrid Powertrain Control Module [10/2018 - 07/2022]: Procedure

  1. CHECK DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2018 - ]

      Body Electrical > ASC > Clear DTCs 

    2. Recheck for DTCs and check that no DTCs are output.

      Refer to DTC CHECK / CLEAR [10/2018 - ]

      Body Electrical > ASC > Trouble Codes 

      OK

      DTCs U0100, U0122, U0129, U0293 and U0142 are not output.

      Result

      Result Proceed to
      OK A
      NG (for Gasoline Model) B
      NG (for HV Model) C

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] 

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]