DTC P3222-313 Generator Inverter Temperature Sensor Circuit High / Low; DTC P3223-312 Generator Inverter Temperature Sensor Circuit High: Description
The HV control ECU uses a temperature sensor, which is built into the inverter, to detect the temperature of the generator 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 generator inverter temperature sensor is the same as the boost converter temperature sensor (see DTC P0A94-442 DC / DC Converter Performance ).
The HV control ECU limits the load based on the signals transmitted by the generator 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 generator inverter temperature sensor, as well as in the sensor itself.
| DTC No. | INF Code | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| P3222 | 313 | Open or GND short in generator inverter temperature sensor circuit |
|
| P3223 | 312 | +B short in generator inverter temperature sensor circuit |
|
HINT:
After confirming DTC P3222 (INF 313) or P3223 (INF 312), confirm MG1 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 |