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Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Collision/Avoidance >> Parking Support Alert System - Diagnostic Codes (2 Of 2), Circuit & Symptom Tests >> Parking Support Alert System >> DTC U0073: Control Module Communication Bus "A" Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [12/2017 - 10/2020] >> Procedure
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DTC U0073: Control Module Communication Bus "A" Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0140: Lost Communication with Body Control Module; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module [12/2017 - 10/2020]: Procedure

  1. CHECK DTC OUTPUT 
    1. Clear the DTCs

      Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Clear DTCs 

    2. Check for DTCs

      Refer to DTC CHECK / CLEAR [12/2017 - 10/2020]

      Body Electrical > Advanced Parking Guidance/ICS/Intuitive P/A > Trouble Codes 

      Result

      Result Proceed to
      DTC U0073, U0126, U0129, U0140 and U0155 are not output A
      DTC U0073, U0126, U0129, U0140 and U0155 are not output B

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020] 

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 10/2020]