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Home >> Toyota >> 2022 >> Avalon XLE >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 109 (Lin Communication System - Diagnostic Codes (Hybrid)) >> LIN COMMUNICATION SYSTEM (for HV Model) >> DTC B278C: Lost Communication with Power Source Control [04/2018 - ] >> Caution / Notice / Hint

Caution / Notice / Hint

WARNING: This page is about a different variant/trim than selected.
NOTE:
  • Before replacing the certification ECU (smart key ECU assembly), refer to Registration.

    Refer to REGISTRATION [04/2018 - 08/2020] , or refer to REGISTRATION [08/2020 - ]

  • 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 Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Smart Key. 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.
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