DTC B1905/74 Short in Front Passenger Side Pretensioner Squib Circuit; DTC B1906/74 Open in Front Passenger Side Pretensioner Squib Circuit; DTC B1907/74 Short to GND in Front Passenger Side Pretensioner Squib Circuit; DTC B1908/74 Short to B+ in Front Passenger Side Pretensioner 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.