DTC B1647: Side Satellite Sensor Bus Lost Communication (LH); DTC B1648: Side Satellite Sensor Bus Initialization Error (LH) [11/2018 - 02/2019]: Description

The side collision sensor LH circuit consists of the airbag ECU assembly, side airbag pressure sensor LH and No. 2 side airbag sensor assembly LH.

The No. 2 side airbag sensor assembly LH and side airbag pressure sensor LH detect impacts to the vehicle and send signals to the airbag ECU assembly to determine if the SRS should be deployed.

These DTCs are stored when a malfunction is detected in the circuit for the side collision sensor LH circuit.

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 side airbag pressure sensor LH malfunction. A No. 2 side airbag sensor assembly LH malfunction. An airbag ECU assembly malfunction.	Floor wire Front door wire LH Side airbag pressure sensor LH No. 2 side airbag sensor assembly 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 side airbag pressure sensor LH malfunction. A No. 2 side airbag sensor assembly LH malfunction. An airbag ECU assembly malfunction.	Floor wire Front door wire LH Side airbag pressure sensor LH No. 2 side airbag sensor assembly LH Airbag ECU assembly	Comes on	Not applicable