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DTC P0A93-346: Inverter Cooling System Performance: Description

The inverter converts the high-voltage direct current of the electric vehicle battery assembly into the alternating current for MG2. The inverter generates heat during the conversion process. Therefore, the inverter is cooled by a cooling system consisting of the water pump with motor assembly, the cooling fan, and a radiator. The power management control ECU monitors the electric water pump, cooling fan, and cooling system, and detects the following malfunctions.

Fig 1: Identifying Inverter Cooling System
GTY388203Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC No. INF Code DTC Detection Condition Trouble Area
P0A93 346 Inverter cooling system malfunction (EV cooling malfunction)
  • Inverter cooling system
  • Water pump with motor assembly
  • Inverter with converter assembly
  • Cooling fan system