DTC B1617/84: Lost Communication with Front Airbag Sensor LH; DTC B1618/84: Front Airbag Sensor LH Initialization Incomplete [03/2017 - 04/2020]: 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 should be deployed.

DTC B1617/84 or B1618/84 is 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
B1617/84	Lost Communication with Front Airbag Sensor LH	One of the following conditions is met: The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds. A front airbag sensor LH malfunction. An airbag ECU assembly malfunction.	Instrument panel wire Engine room main wire Front airbag sensor LH Airbag ECU assembly	Comes on	Not applicable
B1618/84	Front Airbag Sensor LH Initialization Incomplete	One of the following conditions is met: The airbag ECU assembly detects a line short circuit signal, open circuit signal, short circuit to ground signal or short circuit to B+ signal in the front airbag sensor LH circuit for 2 seconds. A front airbag sensor LH malfunction. An airbag ECU assembly malfunction.	Instrument panel wire Engine room main wire Front airbag sensor LH Airbag ECU assembly	Comes on	Not applicable