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Home >> Lexus >> 2019 >> LC 500 >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Headlights >> Lighting System (Ext) - Diagnostic Codes, Symptom & Circuit Tests (1 Of 2) (Coupe) >> Lighting System >> DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with Steering Effort Control Module; DTC U0132: Lost Communication with Suspension Control ECU; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0168: Lost Communication with Vehicle Security Control Module; DTC U0182: Lost Communication With Lighting Control Module Front; DTC U023A: Lost Communication with Front Camera Module; DTC U0242: Lost Communication With Headlamp Control Module "B" [03/2017 - ] >> Procedure
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DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0101: Lost Communication with TCM; DTC U0126: Lost Communication with Steering Angle Sensor; DTC U0129: Lost Communication with Brake System Control Module; DTC U0130: Lost Communication with Steering Effort Control Module; DTC U0132: Lost Communication with Suspension Control ECU; DTC U0142: Lost Communication with Body Control Module "B"; DTC U0155: Lost Communication With Instrument Panel Cluster (IPC) Control Module; DTC U0168: Lost Communication with Vehicle Security Control Module; DTC U0182: Lost Communication With Lighting Control Module Front; DTC U023A: Lost Communication with Front Camera Module; DTC U0242: Lost Communication With Headlamp Control Module "B" [03/2017 - ]: Procedure

  1. CHECK FOR DTC 
    1. Clear the DTCs.

      Refer to DTC CHECK / CLEAR [03/2017 - 05/2023] , or refer to DTC CHECK / CLEAR [05/2023 - ]

      Body Electrical > HL AutoLeveling > Clear DTCs 

      Body Electrical > HL AutoLeveling (Sub) > Clear DTCs 

      Body Electrical > Main Body > Clear DTCs 

    2. Check for DTCs.

      Refer to DTC CHECK / CLEAR [03/2017 - 05/2023] , or refer to DTC CHECK / CLEAR [05/2023 - ]

      Body Electrical > HL AutoLeveling > Trouble Codes 

      Body Electrical > HL AutoLeveling (Sub) > Trouble Codes 

      Body Electrical > Main Body > Trouble Codes 

      OK

      DTCs U0073, U0100, U0101, U0126, U0129, U0130, U0132, U0142, U0155, U0168, U0182, U023A and U0242 are not output.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 04/2020]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [04/2020 - 05/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2023 - ] 

    Result: 

    NG 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [03/2017 - 09/2018]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - 05/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [05/2023 - ]