DTC B1647: Side Satellite Sensor Bus Lost Communication (LH); DTC B1648: Side Satellite Sensor Bus Initialization Error (LH) [06/2018 - 09/2022]: Description

The side collision sensor LH circuit (bus 1) consists of the airbag ECU assembly, door side airbag sensor LH and side No. 2 airbag sensor assembly LH.

The door side airbag sensor LH and side No. 2 airbag sensor assembly LH detect impacts to the vehicle and send 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 side collision sensor LH circuit (bus 1).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B1647	Side Satellite Sensor Bus Lost Communication (LH)	The airbag ECU assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1). Side No. 2 airbag sensor assembly LH malfunction Door side airbag sensor LH malfunction Airbag ECU assembly malfunction	Floor wire Front door wire LH Side No. 2 airbag sensor assembly LH Door side airbag sensor LH Airbag ECU assembly	Comes on	Does not apply to test/check mode
B1648	Side Satellite Sensor Bus Initialization Error (LH)	The airbag ECU assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1). Side No. 2 airbag sensor assembly LH malfunction Door side airbag sensor LH malfunction Airbag ECU assembly malfunction	Floor wire Front door wire LH Side No. 2 airbag sensor assembly LH Door side airbag sensor LH Airbag ECU assembly	Comes on	Does not apply to test/check mode