Taillight Relay Circuit [01/2019 - 09/2022]: Description
WARNING: This page is about a different car, the 2022 Toyota Corolla, 2021 Toyota Corolla, and 2020 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.
The main body ECU (multiplex network body ECU) controls the operation of the TAIL relay.