DTC B1800/51 Short in Driver Side Squib Circuit; DTC B1801/51 Open in Driver Side Squib Circuit; DTC B1802/51 Short to GND in Driver Side Squib Circuit; DTC B1803/51 Short to B+ in Driver Side Squib Circuit: 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.