Lexus RX (RX 350L, RX450h) 2016-2025 Repair Manual: Lost Communication with Power Source Control (B278C)

NOTICE:

• If the certification ECU (smart key ECU assembly) is replaced, refer to Registration.

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• When using the Techstream with the engine 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 Access(CAN). 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.

No Response from ID BOX (B2789)

DESCRIPTION This DTC is stored when LIN communication between the certification ECU (smart key ECU assembly) and ID code box (immobiliser code ECU) stops for 10 seconds or more. DTC No. Detection ...

Network Gateway Ecu

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