DTC P0C4E
DTC P0C4E: Traction Motor Rotor Position Exceeded Learning Limit
General Description
The motor control module controls the traction motor by detecting the rotor position angle using the traction motor motor rotor position sensor. The motor control module detects zero point offset to improve torque accuracy and traction motor efficiency. When the zero point offset detection value is out of a permissible range, the motor control module in the power control unit (PCU) detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Once when the motor control module is reset |
| Sequence | None |
| Duration | 15 seconds or more |
| DTC Type | One drive cycle, MIL off, POWER SYSTEM indicator on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| Traction motor speed | 4, 000 rpm | 8, 500 rpm |
Malfunction Threshold
The traction motor motor rotor position sensor angle detection value is 30 deg. or more.
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 power cable line open
- Traction motor power cable miss installed
- Traction motor motor rotor position sensor failure
- Traction motor failure
- PCU internal failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the POWER SYSTEM indicator comes on and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the motor control module memory. The MIL does not come on.
Conditions for clearing the DTC
The POWER SYSTEM indicator is cleared if the malfunction does not return in the next trip in which the diagnostic runs. The POWER SYSTEM indicator, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.