DTC B1642: Side Satellite Sensor Bus Lost Communication (RH); DTC B1643: Side Satellite Sensor Bus Initialization Error (RH) [09/2022 - ]: Description

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The side collision sensor RH circuit (bus 1) consists of the airbag ECU assembly and door side airbag sensor RH.

The door side airbag sensor RH 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 RH circuit (bus 1).

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	Warning Indicate	Test Mode / Check Mode
B1642	Side Satellite Sensor Bus Lost Communication (RH)	The airbag ECU assembly detects a line short, short to ground or B+, or an open in the side collision sensor RH circuit (bus 1). Door side airbag sensor RH malfunction Airbag ECU assembly malfunction	Floor wire Front door wire RH Door side airbag sensor RH Airbag ECU assembly	Comes on	Does not apply to test/check mode
B1643	Side Satellite Sensor Bus Initialization Error (RH)	The airbag ECU assembly detects a line short, short to ground or B+, or an open in the side collision sensor RH circuit (bus 1). Door side airbag sensor RH malfunction Airbag ECU assembly malfunction	Floor wire Front door wire RH Door side airbag sensor RH Airbag ECU assembly	Comes on	Does not apply to test/check mode