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Home >> Lexus >> 2022 >> UX 200 Base >> Repair and Diagnosis (Single Page) >> Restraints >> Restraints Control Systems >> Pre-Collision (Diagnostic Codes) >> Pre-Collision System >> DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed; DTC U030057: Internal Control Module Software Incompatibility Invalid / Incompatible Software Component [07/2022 - ] >> Procedure
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DTC U0300-51: Internal Control Module Software Incompatibility Not Programmed; DTC U030057: Internal Control Module Software Incompatibility Invalid / Incompatible Software Component [07/2022 - ]: Procedure

  1. CHECK FOR DTCs 
    1. Using the Techstream, check for hybrid control system DTCs.

      Powertrain > Hybrid Control > Trouble Codes 

      Result

      Result Proceed to
      Hybrid control system DTCs are not output A
      Hybrid control system DTCs are output B

    Result: 

    B 

    GO TO HYBRID VEHICLE CONTROL SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ] 

    Result: 

    A 

    See step  2

  2. CHECK FOR DTCs (HEALTH CHECK) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: System Select / Health Check.
    5. Check DTCs.
    6. Turn the ignition switch off.

      OK

      DTCs indicating a vehicle information mismatch with the hybrid vehicle control ECU are not output by any ECU other than the forward recognition camera.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [07/2022 - ] 

    Result: 

    OK 

    See step  3

  3. READ VALUE USING TECHSTREAM (Pre-Collision System) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Pre-Collision System / Data List.
    5. Read the Data List according to the display on the Techstream.

      Body Electrical > Pre-Collision System > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Vehicle Information (Conv/HV/EV) Vehicle information (Conv/HV/EV) Unknown / Conv / HV/EV Unknown: Vehicle information not confirmed
      Conv: Conventional
      HV/EV: Hybrid vehicle      		 -
      Vehicle Information (Transmission Type) Vehicle information (transmission type) MT / AT / CVT / MMT / SMT / HV/EV - AT / Unknown Displays the type of transmission -

      Body Electrical > Pre-Collision System > Data List 

      Tester Display
      Vehicle Information (Conv/HV/EV)
      Vehicle Information (Transmission Type)

      HINT: 

      • If the vehicle information stored in the forward recognition camera is different than the actual vehicle specifications, the vehicle information stored in the forward recognition camera may be incorrect. Check for DTCs and replace the forward recognition camera if necessary.
      • If the vehicle information stored in the forward recognition camera matches the actual vehicle specifications, the installed hybrid vehicle control ECU is incompatible. Replace the hybrid vehicle control ECU with a correct one.

      Result

      Result Proceed to
      Vehicle information stored in forward recognition camera and actual vehicle specifications do not match A
      "Unknown" is displayed
      Vehicle information stored in forward recognition camera and actual vehicle specifications match B

    Result: 

    A 

    REPLACE FORWARD RECOGNITION CAMERA. Refer to  COMPONENTS [10/2018 - ] 

    Result: 

    B 

    REPLACE HYBRID VEHICLE CONTROL ECU. Refer to  REMOVAL [07/2022 - ] 

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