Monitor Description
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.
P0A1C (INF 693):
If excessive current flows through the rear motor inverter due to an internal short, the rear motor inverter will transmit an inverter fail signal to the MG ECU. Upon receiving this signal, the hybrid vehicle control ECU assembly will illuminate the MIL and store a DTC.
P0A1C (INF 812):
The MG ECU monitors the rear motor inverter electric current. If the current exceeds the threshold level for a specified period of time, the hybrid vehicle control ECU assembly will illuminate the MIL and store a DTC.