DTC U0311 (Motor Control Module)
DTC U0311: Traction Motor Control Module Programming Error (Version Mismatch)
General Description
The motor control module in the power control unit (PCU) can be updated by a software rewriting device connected via CAN lines. Each control module has program version information as ROM values and compares its own with the others by transmitting/receiving the values via CAN lines. The PCU needs to be updated with the other modules. If the PCU detects that its own software is not the latest version, the warning indicator comes on and the motor control module stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 1.0 second or more |
| DTC Type | One drive cycle, MIL on, POWER SYSTEM indicator on |
Enable Conditions
| Condition | ||
|---|---|---|
| Vehicle | ON mode | |
Malfunction Threshold
The motor control module detects that its own software is not the latest version for at least 1.0 second after comparing program version information.
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.
- Program version mismatch between the motor control module and other control modules
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.