DTC B1643/81: Driver Side Satellite Sensor Bus Initialization Incomplete: Description

The side airbag sensor LH and rear airbag sensor LH consist of parts including the diagnostic circuit and the lateral deceleration sensor.

When the center airbag sensor assembly receives signals from the lateral deceleration sensor, it determines whether or not the SRS should be activated.

DTC B1643/81 is set when a malfunction is detected in the side airbag sensor LH or rear airbag sensor LH circuit.

DTC No.	Detection Condition	Trouble Area
B1643/81	Center airbag sensor assembly detects open circuit signal in side airbag sensor LH circuit or rear airbag sensor LH circuit for 2 seconds. Side airbag sensor LH malfunction Rear airbag sensor LH malfunction Center airbag sensor assembly malfunction	No. 2 floor wire Side airbag sensor LH Rear airbag sensor LH Center airbag sensor assembly