P0AF0

DTC P0AEF-275 Drive Motor Inverter Temperature Sensor "A" Circuit Low
DTC P0AF0-274 Drive Motor Inverter Temperature Sensor "A" Circuit High

DESCRIPTION

DTC Detection Condition:

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.

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.






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.

Wiring Diagram:

INSPECTION PROCEDURE

CAUTION:
- Before inspecting the high-voltage system, take safety precautions to prevent electrical shocks, such as wearing insulated gloves and removing the service plug grip. After removing the service plug grip, put it in your pocket to prevent other technicians from reconnecting it while you are servicing the high-voltage system.
- After disconnecting the service plug grip, wait for at least 5 minutes before touching any of the high-voltage connectors or terminals.

HINT: At least 5 minutes are required to discharge the high-voltage condenser inside the inverter.(a) Connect the intelligent tester to the DLC3.

Step 1-2:

Step 2(Continued)-3:

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Step 4(Continued)-5: