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 the HV coolant temperature using the coolant temperature sensor built into the inverter with converter assembly. The inverter cooling system is the same as that for MG2 and MG1, and operates independently of the engine cooling system. The hybrid vehicle control ECU uses signals from the coolant temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the hybrid vehicle control ECU will control the HV system output to help prevent overheating. The inverter with converter assembly detects malfunctions in the HV coolant temperature sensor and its wiring.