DTC B1815/54: Short in Front Passenger Side Squib 2nd Step Circuit; DTC B1816/54: Open in Front Passenger Side Squib 2nd Step Circuit; DTC B1817/54: Short to GND in Front Passenger Side Squib 2nd Step Circuit; DTC B1818/54: Short to B+ in Front Passenger Side Squib 2nd Step Circuit [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

The front passenger side squib 2nd step circuit consists of the airbag sensor assembly and instrument panel passenger airbag assembly.

The airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the front passenger side squib 2nd step circuit.

DTC No.	DTC Detection Condition	Trouble Area
B1815/54	The airbag sensor assembly receives a line short circuit signal in the front passenger side squib 2nd step circuit during primary check. Front passenger side squib 2nd step malfunction Airbag sensor assembly malfunction	Instrument panel wire No. 2 instrument panel wire Instrument panel passenger airbag assembly (Front passenger side squib 2nd step) Airbag sensor assembly
B1816/54	The airbag sensor assembly receives an open circuit signal in the front passenger side squib 2nd step circuit. Front passenger side squib 2nd step malfunction Airbag sensor assembly malfunction
B1817/54	The airbag sensor assembly receives a short circuit to ground signal in the front passenger side squib 2nd step circuit. Front passenger side squib 2nd step malfunction Airbag sensor assembly malfunction
B1818/54	The airbag sensor assembly receives a short circuit to B+ signal in the front passenger side squib 2nd step circuit. Front passenger side squib 2nd step malfunction Airbag sensor assembly malfunction