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Home >> Lexus >> 2024 >> ES 350 Base >> Repair and Diagnosis (Single Page) >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (Except Hybrid) - Diagnostic Codes (4 Of 4) & Symptom Tests >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model) >> DTC U0074-88: Control Module Communication Bus "B" Off Bus Off; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0131-87: Lost Communication With Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message [06/2018 - ] >> Procedure
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DTC U0074-88: Control Module Communication Bus "B" Off Bus Off; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication With Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0131-87: Lost Communication With Power Steering Control Module Missing Message; DTC U0140-87: Lost Communication with Body Control Module Missing Message; DTC U0151-87: Lost Communication with Restraints Control Module Missing Message [06/2018 - ]: Procedure

  1. CHECK DTC OUTPUT (HEALTH CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Operate the Techstream to clear the codes. Enter the following menus: Chassis / Brake/EPB / Trouble Codes.

      Chassis > Brake/EPB > Clear DTCs 

    4. Press the DTC clear button.
    5. Turn the engine switch off.
    6. Turn the engine switch on (IG).
    7. Enter the following menus: System Select / Health Check.
    8. Check for DTCs.

      Result

      Result Proceed to
      DTCs for related systems are output together with DTC U0074-88, U0100-87, U0101-87, U0125-87, U0126-87, U0131-87, U0140-87 or U0151-87. A
      U0074-88, U0100-87, U0101-87, U0125-87, U0126-87, U0131-87, U0140-87 or U0151-87 is output. B
      DTCs are not output. C

    Result: 

    GO TO DIAGNOSTIC TROUBLE CODE CHART (RELATED SYSTEM). Refer to  DIAGNOSTIC TROUBLE CODE CHART [06/2018 - 08/2020]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [08/2020 - ] 

    Result: 

    INSPECT CAN COMMUNICATION SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ] 

    Result: 

    USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [06/2018 - ]