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Home >> Lexus >> 2016 >> LX 570 >> Repair and Diagnosis (Single Page) >> Restraints >> Seat Belts >> Pre-Collision System - Diagnostic Codes & Circuit Tests >> Pre-Collision System >> DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U023A: Lost Communication with Front Camera Module; DTC U1002: Lost Communication with Gateway Module; DTC U1104: Lost Communication with Driving Support ECU [09/2015 - ] >> Procedure
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DTC U0100: Lost Communication with ECM / PCM "A"; DTC U0125: Lost Communication with Yaw Rate Sensor Module; DTC U0126: Lost Communication with Steering Angle Sensor Module; DTC U0129: Lost Communication with Brake System Control Module; DTC U0235: Lost Communication with Cruise Control Front Distance Range Sensor; DTC U023A: Lost Communication with Front Camera Module; DTC U1002: Lost Communication with Gateway Module; DTC U1104: Lost Communication with Driving Support ECU [09/2015 - ]: Procedure

  1. CHECK DTC (CAN COMMUNICATION SYSTEM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Enter the following menus: Body Electrical / Pre-Collision 2 / Trouble Codes.
    4. Clear the DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] .
    5. Make sure that the DTC detection conditions are met.

      HINT: 

      If the detection conditions are not met, the system cannot detect the malfunction.

    6. Check for DTCs. Refer to DTC CHECK / CLEAR [09/2015 - ] .
      RESULT

      Result Proceed to
      DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 or U1104 is output A
      DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 and U1104 are not output B

    Result: 

    USE SIMULATION METHOD TO CHECK 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] )

    Result: 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to DIAGNOSIS SYSTEM [09/2015 - 08/2017] , or refer to DIAGNOSIS SYSTEM [08/2017 - 08/2019] , or refer to DIAGNOSIS SYSTEM [08/2019 - ] )