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Home >> Lexus >> 2020 >> UX 250h Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Smart Access System W/ Push-Button Start (Start Function) (Symptom Tests) (2 Of 2) (Hybrid) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, HV Model) >> Immobiliser System does not Operate Properly [10/2018 - ] >> Caution / Notice / Hint
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Caution / Notice / Hint

NOTE:
  • When using the Techstream with the power switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Access. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • The smart access system with push-button start (for Start Function, HV Model) uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart access system with push-button start (for Start Function, HV Model) after confirming that the communication systems are functioning properly.

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2018 - 07/2022] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2022 - ]

  • Before replacing the hybrid vehicle control ECU or ID code box (immobiliser code ECU), refer to Registration.

    Refer to REGISTRATION [10/2018 - 10/2019] , or refer to REGISTRATION [10/2019 - 07/2022] , or refer to REGISTRATION [07/2022 - ]

  • After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
  • Make sure that no DTCs are output. If any DTCs are output, proceed to the Diagnostic Trouble Code Chart.

HINT: 

If an immobiliser function or hybrid control system DTC is output, first perform troubleshooting for the immobiliser function or hybrid control system DTC.