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Home >> Lexus >> 2020 >> LS 500 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Exterior Lights >> Lighting System (Ext) - Diagnostic Codes (3 Of 3), Symptom Tests & Circuit Tests (1 Of 2) >> Lighting System >> DTC U0073: Control Module Communication Bus Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0182: Lost Communication With Lighting Control Module Front [10/2020 - 10/2023] >> Procedure
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DTC U0073: Control Module Communication Bus Off; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication with Instrument Panel Cluster (IPC) Control Module; DTC U0182: Lost Communication With Lighting Control Module Front [10/2020 - 10/2023]: Procedure

  1. CHECK FOR DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > AFS (Sub) > Clear DTCs 

    2. Turn the engine switch on (IG) and wait for at least 10 seconds or more.
    3. Check for DTCs.

      Refer to DTC CHECK / CLEAR [10/2020 - 10/2023]

      Body Electrical > AFS (Sub) > Trouble Codes 

      OK

      DTCs U0073, U0126, U0142, U0155 and U0182 are not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 11/2021]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - 10/2022]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 10/2023] 

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2020 - 10/2023]