DTC B1800: Short in D Squib Circuit; DTC B1801: Open in D Squib Circuit; DTC B1802: Short in D Squib Circuit (to Ground); DTC B1803: Short in D Squib Circuit (to +B) [04/2018 -]: Wiring Diagram

WARNING: This page is about a different car, the 2022 Toyota Avalon, 2021 Toyota Avalon, 2020 Toyota Avalon, and 2019 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.