DTC P321E-318: All HV Gate Blocking Range/Performance [08/2013 - ]: Description

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

The power management control ECU sends a block signal to the motor generator control ECU (MG ECU) to shutdown the power supply to the motor. When the system is not in the on (READY) state, it sends an HSDN (MG shutdown signal) signal from the power management control ECU to the motor generator control ECU (MG ECU) to check the function of the HV gate block. When a malfunction is detected in the HV gate block function, DTCs are stored.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P321E	318	An open or ground short in the HV gate block signal circuit when the gate is operating When the HV gate block function is being checked, inverter voltage (VH) drops or current flows in the inverter. (Both the motor (MG2) and the generator (MG1) are malfunctioning.)	Wire harness or connector Power management control ECU Inverter with converter assembly