DTC P0A3C
DTC P0A3C: Traction 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 | - |
Malfunction Threshold
One of these symptoms occurs:
- Symptom 1
The output temperature from the IGBT chip temperature sensor is more than 328 deg.F (164 deg.C) for at least 100 milliseconds.
- Symptom 2
The output temperature from the IGBT chip temperature sensor is more than 317 deg.F (158 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.
- Traction motor motor rotor position sensor line failure
- Traction motor power cable line failure
- Traction motor gate drive-wire line failure
- Radiator fan control (RFC) unit line failure
- PCU electric coolant pump line failure
- Water pipe leak
- Water pipe clogged
- RFC unit failure
- PCU coolant temperature sensor failure
- Traction motor motor rotor position sensor failure
- Motor phase current sensor failure
- PCU electric coolant pump failure
- Traction motor 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.