DTC P0AEF-275: Drive Motor Inverter Temperature Sensor "A" Circuit Low; DTC P0AF0-274: Drive Motor Inverter Temperature Sensor "A" Circuit High [08/2013 - ]: Description
WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.
- The MG ECU located in the inverter with converter assembly detects the temperature of the motor inverter using a temperature sensor built into the inverter with converter assembly. The inverter cooling system operates independently of the engine cooling system. The MG ECU uses signals from the motor inverter temperature sensor to check the effectiveness of the inverter cooling system. If necessary, the MG ECU will limit inverter output to help prevent inverter overheating. The MG ECU also detects malfunctions in the motor inverter temperature sensor and its wiring.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P0AEF | 275 | Short to GND in the motor inverter temperature sensor circuit | Inverter with converter assembly |
| P0AF0 | 274 | Open or short to +B in motor inverter temperature sensor circuit |