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Home >> Lexus >> 2020 >> LS 500h AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Lin Communication System - Diagnostic Codes >> Lin Communication System >> DTC B2789: No Response from ID BOX [10/2017 - 10/2023] >> Caution / Notice / Hint

Caution / Notice / Hint

NOTE:
  • When using the Techstream with the power switch off to troubleshoot:

    Connect the Techstream to the vehicle, and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • Before replacing the certification ECU (smart key ECU assembly) or immobiliser code ECU, refer to the smart access system with push-button start (for start function).

HINT: 

When the communication between the ID code box (immobiliser code ECU) and certification ECU (smart key ECU assembly) stops, DTC B2785 is also stored.

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