DTC B1617: Front Airbag Sensor Lost Communication (LH); DTC B1618: Front Airbag Sensor Initialization Error (LH) [04/2018 -]: Description

WARNING: This page is about a different car, the 2022 Toyota Avalon, 2021 Toyota Avalon, 2020 Toyota Avalon, and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

The front airbag sensor LH circuit consists of the airbag ECU assembly and front airbag sensor LH.

The front airbag sensor LH detects impacts to the vehicle and sends signals to the airbag ECU assembly to determine if the airbags and pretensioners should be deployed.

These DTCs are stored when a malfunction is detected in the front airbag sensor LH circuit.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B1617	Front Airbag Sensor Lost Communication (LH)	The airbag ECU assembly detects a line short, short to ground or B+, or an open in the front airbag sensor LH circuit. Front airbag sensor LH malfunction Airbag ECU assembly malfunction	Instrument panel wire Engine room main wire Front airbag sensor LH Airbag ECU assembly	Comes on	Does not apply to test/check mode
B1618	Front Airbag Sensor Initialization Error (LH)	The airbag ECU assembly detects a line short, short to ground or B+, or an open in the front airbag sensor LH circuit. Front airbag sensor LH malfunction Airbag ECU assembly malfunction	Instrument panel wire Engine room main wire Front airbag sensor LH Airbag ECU assembly	Comes on	Does not apply to test/check mode