DTC B1855: Short in Rear Side Squib LH Circuit; DTC B1856: Open in Rear Side Squib LH Circuit; DTC B1857: Short to GND in Rear Side Squib LH Circuit; DTC B1858: Short to B+ in Rear Side Squib LH Circuit [10/2020 - 10/2023]: Wiring Diagram

for Fixed Seat Type: 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

for Power Seat: 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002