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Home >> Lexus >> 2023 >> LX 600 Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Infotainment >> Blind Spot Monitor System - Diagnostic Codes & Circuit Tests >> Blind Spot Monitor System >> DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U1110-87: Lost Communication with Clearance Sonar Module Missing Message [12/2021 - ] >> Procedure
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DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0129-87: Lost Communication with Brake System Control Module "A" Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U1110-87: Lost Communication with Clearance Sonar Module Missing Message [12/2021 - ]: Procedure

  1. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Blind Spot Monitor "B" > Trouble Codes 

      HINT: 

      • If CAN communication system DTCs are stored, they may also be stored for other systems.
      • If the CAN communication system has been inspected and repaired, the DTCs will not be output when rechecking for DTCs.
      • If these DTCs are output frequently, duplicate the conditions that cause the problem symptoms and perform the inspection again, even if the DTCs were not output when rechecking for DTCs.

        Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]

      Result

      Result Proceed to
      DTCs are not output A
      DTCs are output B

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ] 

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2021 - ]