DTC B1860/64 Short in Driver Side Knee Airbag Squib Circuit; DTC B1861/64 Open in Driver Side Knee Airbag Squib Circuit; DTC B1862/64 Short to GND in Driver Side Knee Airbag Squib Circuit; DTC B1863/64 Short to B+ in Driver Side Knee Airbag Squib Circuit: Wiring Diagram
WARNING: This page is about a different car, the 2008 Lexus IS F. However, it is still accessible from the selected car via links, so may be relevant.