DTC P3226-562: DC/DC Boost Converter Temperature Sensor; DTC P3226-563: DC/DC Boost Converter Temperature Sensor: Description

The MG ECU located in the inverter with converter assembly detects the temperature of the boost inverter using a temperature sensor built into the inverter with converter assembly. The inverter cooling system is the same as that for MG2 and MG1, and it operates independently of the engine cooling system. The MG ECU uses the signal from the boost converter temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the MG ECU will limit inverter output to prevent inverter overheating. The ECU also detects malfunctions in the boost converter temperature sensor.

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P3226	562	Sudden change in boost converter temperature sensor output	Wire harness or connector Inverter cooling system Water with motor pump assembly Inverter with converter assembly (MG ECU) Cooling fan motor Cooling fan ECU ECM Hybrid vehicle control ECU INV W/P fuse Integration relay
P3226	563	Boost converter temperature sensor output deviation	Wire harness or connector Inverter cooling system Water with motor pump assembly Inverter with converter assembly (MG ECU) Cooling fan motor Cooling fan ECU ECM Hybrid vehicle control ECU INV W/P fuse Integration relay