DTC B1647: Side Satellite Sensor Bus Lost Communication (LH); DTC B1648: Side Satellite Sensor Bus Initialization Error (LH) [12/2019 - 11/2023]: Description

The side collision sensor LH circuit (bus 1) consists of the airbag sensor assembly, side airbag sensor assembly LH and rear airbag sensor LH.

The side airbag sensor assembly LH and rear airbag sensor LH detect impacts to the vehicle and send signals to the airbag sensor 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 sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1). Rear airbag sensor LH malfunction Side airbag sensor assembly LH malfunction Airbag sensor assembly malfunction	No. 2 floor wire Front door wire LH Rear airbag sensor LH Side airbag sensor assembly LH Airbag sensor assembly	Comes on	Does not apply to test/check mode
B1648	Side Satellite Sensor Bus Initialization Error (LH)	The airbag sensor assembly detects a line short, short to ground or B+, or an open in the side collision sensor LH circuit (bus 1). Rear airbag sensor LH malfunction Side airbag sensor assembly LH malfunction Airbag sensor assembly malfunction	No. 2 floor wire Front door wire LH Rear airbag sensor LH Side airbag sensor assembly LH Airbag sensor assembly	Comes on	Does not apply to test/check mode