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Home >> Toyota >> 2021 >> Sequoia TRD Pro >> Repair and Diagnosis (Single Page) >> Steering >> Power Steering >> Power Steering System - Diagnostic Codes & Circuit Tests >> Power Steering System >> DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module [08/2017 - ] >> Procedure
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DTC U0073: Control Module Communication Bus Off; DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module [08/2017 - ]: Procedure

  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM) 
    1. Clear the DTC. Refer to

      DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to

      DTC CHECK / CLEAR [08/2019 - ]

    2. Check for DTC. Refer to

      DTC CHECK / CLEAR [08/2015 - 08/2019] , or refer to

      DTC CHECK / CLEAR [08/2019 - ]

      RESULT

      Result Proceed to
      DTC is not output A
      DTC is output B

    Result: 

    USE SIMULATION METHOD TO CHECK 

    Refer to

    HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - 08/2018] , or refer to

    HOW TO PROCEED WITH TROUBLESHOOTING [08/2018 - 08/2019] , or refer to

    HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ] )

    Result: 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to

    HOW TO PROCEED WITH TROUBLESHOOTING [08/2017 - 08/2019] , or refer to

    HOW TO PROCEED WITH TROUBLESHOOTING [08/2019 - ]