DTC B1642-81: Lost Communication with Side Satellite Sensor Bus RH; DTC B1647-82: Lost Communication with Side Satellite Sensor Bus LH [12/2012 - ]: Description

The circuit for the side collision sensor LH or RH (to determine deployment of the front seat airbag assembly LH or RH and curtain shield airbag assembly LH or RH) is composed of the airbag sensor assembly, rear airbag sensor LH or RH and door side airbag sensor LH or RH.

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

DTC B1642/82 or B1647/82 is stored when a malfunction is detected in the circuit for the side satellite sensor bus LH or RH (to determine deployment of the front seat airbag assembly LH or RH and curtain shield airbag assembly LH or RH).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B1642/81	Lost Communication with Side Satellite Sensor Bus RH	One of the following conditions is met: The airbag sensor 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 RH for 2 seconds. A door side airbag sensor RH malfunction. A rear airbag sensor RH malfunction. An airbag sensor assembly malfunction.	Floor wire Front door wire RH Door side airbag sensor RH Rear airbag sensor RH Airbag sensor assembly
B1647/82	Lost Communication with Side Satellite Sensor Bus LH	One of the following conditions is met: The airbag sensor 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 rear airbag sensor LH malfunction. An airbag sensor assembly malfunction.	No. 2 floor wire Front door wire LH Door side airbag sensor LH Rear airbag sensor LH Airbag sensor assembly