DTC B1647: Side Satellite Sensor Bus Lost Communication (LH); DTC B1648: Side Satellite Sensor Bus Initialization Error (LH) [10/2020 - 11/2021]: Description

The circuit for the side collision sensor LH is composed of the airbag ECU assembly, rear airbag sensor LH, side airbag sensor assembly LH and door side airbag sensor LH.

The door side airbag sensor LH, side airbag sensor assembly LH and rear airbag sensor LH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the airbag should be deployed.

DTC B1647 or B1648 is stored when a malfunction is detected in the circuit for the side satellite sensor bus LH.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B1647	Side Satellite Sensor Bus Lost Communication (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 circuit for the side satellite sensor bus LH for 2 seconds. A door side airbag sensor LH malfunction. A side airbag sensor assembly LH malfunction. A rear airbag sensor LH malfunction. An airbag ECU assembly malfunction.	Floor wire Front door wire LH Door side airbag sensor LH Side airbag sensor assembly LH Rear airbag sensor LH Airbag ECU assembly	Comes on	Not applicable
B1648	Side Satellite Sensor Bus Initialization Error (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 circuit for the side satellite sensor bus LH for 2 seconds. A door side airbag sensor LH malfunction. A side airbag sensor assembly LH malfunction. A rear airbag sensor LH malfunction. An airbag ECU assembly malfunction.	Floor wire Front door wire LH Door side airbag sensor LH Side Airbag Sensor Assembly LH Rear airbag sensor LH Airbag ECU assembly	Comes on	Not applicable