Monitor Description
WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.
The MG ECU monitors the rear motor PWM circuit. If there is an error in the power transistor actuation signals which are transmitted to the inverter, the MG ECU interprets this as a malfunction of the rear motor PWM circuit. The HV control ECU illuminates the MIL and sets a DTC.