DTC P0A2C-247 Drive Motor "A" Temperature Sensor Circuit Low; DTC P0A2D-249 Drive Motor "A" Temperature Sensor Circuit High: Description

WARNING: This page is about a different car, the 2006 Lexus RX 400h. However, it is still accessible from the selected car via links, so may be relevant.

The resistance of the thermistor built into the motor temperature sensor changes in accordance with changes in Motor temperature. The lower the Motor temperature, the higher the thermistor resistance. Conversely, the higher the temperature, the lower the resistance.

Fig 1: Identifying Drive Motor "A" Temperature Resistance Graph

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

DTC DETECTION TROUBLE CONDITION

DTC No.	INF Code	DTC Detection Condition	Trouble Area
P0A2C	247	GND short in motor temperature sensor circuit	Wire harness or connector HV control ECU Hybrid vehicle transaxle assembly (Motor temperature sensor)
P0A2D	249	Open or +B short in motor temperature sensor circuit	Wire harness or connector HV control ECU Hybrid vehicle transaxle assembly (Motor temperature sensor)

HINT:

After confirming that DTC P0A2C-247 or P0A2D-249 is output, use the intelligent tester to check "MOTOR 2 TEMP" in the HV system ECU data list.

DRIVE MOTOR "A" TEMPERATURE SENSOR CIRCUIT HIGH

Displayed Temperature	Malfunction
-50°C	Open or +B short circuit
205°C	GND short