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Home >> Lexus >> 2019 >> UX 200 Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 5 (Smart Access System W/ Push-Button Start (Start Function) (Diagnostics - Introduction) (1 Of 2) (Hybrid)) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, HV Model) >> Check For Intermittent Problems [07/2022 - ] >> Check For Intermittent Problems [07/2022 - ]

Check For Intermittent Problems [07/2022 - ]

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus UX 250h, 2023 Lexus UX 250h, 2022 Lexus UX 250h, 2021 Lexus UX 250h, and 2020 Lexus UX 250h. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
  • Operation history is stored in the RAM or EEPROM of the certification ECU (smart key ECU assembly). As the cause of a malfunction stored in the RAM will be cleared when the cable is disconnected from the negative (-) auxiliary battery terminal, do not disconnect the cable from the negative (-) auxiliary battery terminal before checking and recording are complete.
  • If the vehicle or vehicle controls are operated (for example, during initial inspection when the vehicle is brought in for repair) before operation history has been read and saved, the operation history information could be lost.
  • The operation history function uses the current system time of the Techstream and the time counter inside the controlling ECU to calculate the time shown in the operation history. For this reason, before reading the operation history, first make sure that the Techstream system clock is accurately set to the current time.
  1. OPERATION HISTORY 

    HINT: 

    The certification ECU (smart key ECU assembly) stores the operation history of the smart access system with push-button start and it can be read using the Techstream.

    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Smart Access / Utility / Operation History / (desired item).

      Body Electrical > Smart Access > Utility 

      Tester Display
      Operation History
    5. According to the display on the Techstream, read and save the operation history.
      Operation History List
      Auto Entry Mode Switch History
      Auto Entry Wireless Operation History
      Warning Operation History
      Engine Start
      Customize(Auto Entry Cancel)
      Customize(Door Unlock Mode Switch)
      Radio Wave Interference (RF Signal Received)
      Engine Start (inactive)
      Remote Engine Starter (inactive)
      Auto Entry Unlock (inactive)
      Registration Function (Reason for Non-operation)
      Auto Entry Lock (inactive)
      Engine Start Inactive (Brake/Clutch System)
      Radio Wave Interference (RF Reception Not Available)

      HINT: 

      Some items may not be displayed depending on the specifications of the vehicle.

  2. SYMPTOM SIMULATION 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - ]

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