DTC P0703-12: Brake Switch "B" Circuit Short to Battery [11/2016 - ]: Wiring Diagram
WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. However, it is still accessible from the selected car via links, so may be relevant.
Refer to SFI system DTC P0504-2B.
Refer to DTC P0504-2B: Brake Switch "A"/"B" Signal Cross Coupled [11/2016 - ]