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.
The MG ECU monitors the generator. If the MG ECU detects a reduction in the magnetic force of the generator or an inphase short, it interprets this as a generator malfunction and the hybrid vehicle control ECU assembly will illuminate the MIL and store a DTC.