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Home >> Lexus >> 2020 >> UX 200 Luxury >> Repair and Diagnosis >> External Pages >> Different car >> Section 31 (Smart Access System W/ Push-Button Start (Start Function) (Diagnostic Codes & Symptom Tests (1 Of 2)) (Hybrid)) >> SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function, HV Model) >> DTC B2779: Engine Starter Communication Malfunction [10/2018 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

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:
  • 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.
  • Before performing the inspection, check that DTC B1242 (wireless door lock control system) is not output.
  • Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

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

  • After performing repairs, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
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