DTC B1850/62: Short in Rear Side Squib RH Circuit; DTC B1851/62: Open in Rear Side Squib RH Circuit; DTC B1852/62: Short to GND in Rear Side Squib RH Circuit; DTC B1853/62: Short to B+ in Rear Side Squib RH Circuit [08/2013 - ]: Wiring Diagram
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.