DTC P0A3E
DTC P0A3E: Generator Motor Inverter Over Temperature
General Description
The power control unit (PCU) monitors the IGBT chip temperature sensor value to prevent malfunction of the chip due to heat generation. If the IGBT chip temperature sensor output temperature is out of a specified value for a specified time, the motor control module in the PCU detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 100 milliseconds or more*11 seconds or more** |
| DTC Type | One drive cycle, MIL on, POWER SYSTEM indicator on |
*: Symptom 1
**: Symptom 2
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage | 8 V | - |
| High voltage side power supply voltage (6 V)* | 5 V | - |
Malfunction Threshold
One of these symptoms occurs:
- Symptom 1
The output temperature from the IGBT chip temperature sensor is more than 322 deg.F (161 deg.C) for at least 100 milliseconds.
- Symptom 2
The output temperature from the IGBT chip temperature sensor is more than 302 deg.F (150 deg.C) for at least 11 seconds.
Possible Cause
NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- Generator motor motor rotor position sensor line failure
- Generator motor power cable line failure
- Radiator fan control (RFC) unit line failure
- PCU electric coolant pump line failure
- Water pipe leak
- RFC unit failure
- PCU coolant temperature sensor failure
- Generator motor motor rotor position sensor failure
- PCU electric coolant pump failure
- PCU internal failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the MIL comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the motor control module memory.
Conditions for clearing the DTC
The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.