DTC P0A02-719: Motor Electronics Coolant Temperature Sensor Circuit Low; DTC P0A03-720: Motor Electronics Coolant Temperature Sensor Circuit High: Description

The hybrid vehicle control ECU detects HV coolant temperature through the coolant temperature sensor built into the inverter with converter assembly. The inverter cooling system is the same as that for MG2 or MG1, and operates independently of the engine cooling system. The hybrid vehicle control ECU controls the inverter cooling system to prevent overheating based on signals from the HV coolant temperature sensor. The ECU also monitors cooling system operation and detects malfunctions in the HV coolant temperature sensor and the circuit.