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Home >> Lexus >> 2019 >> IS 350 Base, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2GR-FKS) - Diagnostic Codes (7 Of 7) >> SFI System >> DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [09/2020 - ] >> Procedure
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DTC U0129-87: Lost Communication with Brake System Control Module Missing Message [09/2020 - ]: Procedure

  1. CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC U0129-87) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: System Select / Health Check.
    5. Read the DTCs.

      Result

      Result Proceed to
      DTC U0129-87 is output A
      DTC U0129-87 and other DTCs are output B

      HINT: 

      If any DTCs other than U0129-87 are output, troubleshoot those DTCs first.

    Result: 

    GO TO CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2018 - ] 

    Result: 

    GO TO DTC CHART. Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2020 - ]