DTC B1875: Short in Passenger Side Front Seat Cushion Squib Circuit; DTC B1876: Open in Passenger Side Front Seat Cushion Squib Circuit; DTC B1877: Short to GND in Passenger Side Front Seat Cushion Squib Circuit; DTC B1878: Short to B+ in Passenger Side Front Seat Cushion Squib Circuit [11/2018 - 02/2019]: Wiring Diagram
WARNING: This page is about a different car, the 2020 Toyota RAV4 and 2019 Toyota RAV4. However, it is still accessible from the selected car via links, so may be relevant.