DTC P3227-583: Converter Temperature Sensor Circuit Low; DTC P3228-584: Converter Temperature Sensor Circuit High: Description

The MG ECU uses a temperature sensor that is built into the boost converter to detect the boost converter temperature. The boost converter temperature sensor outputs a voltage that varies between 0 and 5 V in accordance with changes in the temperature. The higher the boost converter temperature, the lower the output voltage. Conversely, the lower the temperature, the higher the output voltage. The MG ECU limits the load based on signals transmitted by the boost converter temperature sensor, in order to prevent the converter from overheating. The MG ECU also detects malfunctions in the wiring of the boost converter temperature sensor, as well as in the sensor itself.

Fig 1: Identifying Correlation Between Output Voltage And Temperature Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002