DTC B1623/81 Driver Side - Side Airbag Sensor Assembly Initialization Incomplete; DTC B1632/81 Lost Communication with Driver Side Rear Air-bag Sensor; DTC B1633/81 Driver Side Rear Airbag Sensor Initialization Incomplete; DTC B1642/81 Lost Communication with Driver Side Satellite Sensor Bus: Wiring Diagram
WARNING: This page is about a different car, the 2008 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.