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Home >> Lexus >> 2024 >> TX 350 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 89 (Smart Access System (For Start) - Diagnostic Codes (2 Of 2) & Symptom Tests) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, except Gasoline Model) >> System Malfunction Message is Displayed on the Multi-information Display [09/2023 - ] >> Procedure

System Malfunction Message is Displayed on the Multi-information Display [09/2023 - ]: Procedure

WARNING: This page is about a different car, the 2024 Lexus TX 550h+ and 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR DTC 
    1. Check for DTCs.

      Body Electrical > Smart Access > Trouble Codes 

      Body Electrical > Power Source Control > Trouble Codes 

      Result

      Result Proceed to
      DTCs are not output A
      DTC is output. B

    Result: 

    GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Entry Function) (DIAGNOSTIC TROUBLE CODE CHART). Refer to  DIAGNOSTIC TROUBLE CODE CHART [09/2023 - 12/2023]  , or refer to  DIAGNOSTIC TROUBLE CODE CHART [12/2023 - ] 

    Result: 

    See step  2

  2. READ VALUE USING GTS (VEHICLE RUNNING CONDITION (LINE)) 
    1. Read the Data List according to the display on the GTS.

      Body Electrical > Power Source Control > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Vehicle Running Condition (Line) Vehicle being driven or stopped Stop or Running Stop: Vehicle stopped
      Running: Vehicle being driven at 5 km/h (3 mph) or more
      -

      Body Electrical > Power Source Control > Data List 

      Tester Display
      Vehicle Running Condition (Line)

      OK

      The GTS display changes correctly in response to the vehicle condition.

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [09/2023 - 12/2023]  , or refer to  REMOVAL [12/2023 - ] 

    Result: 

    NG 

    GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2023 - 12/2023]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2023 - ]