DTC B1617/84: Lost Communication with Front Airbag Sensor LH; DTC B1618/84: Front Airbag Sensor LH Initialization Incomplete: Description

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 airbag and pretensioner should be deployed.

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

DTC No.	DTC Detection Condition	Trouble Area
B1617/84 B1618/84	The airbag ECU assembly receives a line short circuit signal, an open circuit signal, a short circuit to ground signal or a short circuit to B+ signal 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