DTC P0AEF-275 Drive Motor Inverter Temperature Sensor "A" Circuit Low; DTC P0AF0-274 Drive Motor Inverter Temperature Sensor "A" Circuit High: Description
The HV control ECU uses a temperature sensor, which is built into the inverter, to detect the temperature of the motor inverter. The same cooling system that is routed to the MG1 and MG2 cools the inverter. This cooling system is independent from the engine cooling system.
The characteristic of the motor inverter temperature sensor is the same as the boost converter temperature sensor (see DTC P0A94-583 DC / DC CONVERTER PERFORMANCE; DTC P0A94-584 DC / DC CONVERTER PERFORMANCE ).
The HV control ECU limits the load based on the signals transmitted by the motor inverter temperature sensor, in order to check the effectiveness of the inverter cooling system and prevent the inverter from overheating. Furthermore, the HV control ECU detects a malfunction in the wiring of the motor inverter temperature sensor, as well as in the sensor itself.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0AEF | 275 | Open or GND short in motor inverter temperature sensor circuit |
|
| P0AF0 | 274 | +B short in motor inverter temperature sensor circuit |
|
HINT:
After confirming DTC P0AEF (INF 275) or P0AF0 (INF 274), confirm MG2 INVERT TEMP in DIAGNOSIS / OBD/MOBD / HV ECU / DATA LIST using the intelligent tester.
| Temperature Displayed | Malfunction |
|---|---|
| -50°C (-58°F) | +B short circuit |
| 205°C (401°F) | Open or GND short circuit |