DTC P1A64
DTC P1A64: PCU Internal Failure (Communication Error)
General Description
The power control unit (PCU) incorporates a motor control module which controls an output of the traction motor and a power drive unit (PDU) which serves for high voltage control. If the motor control module receives a trouble with microcomputer (A/D converter failure) detected by the PDU, the PCU detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 80 milliseconds or more |
| DTC Type | One drive cycle, MIL on, POWER SYSTEM indicator on |
Enable Conditions
| Condition | ||
|---|---|---|
| Vehicle | ON mode | |
Malfunction Threshold
If the PDU receives a trouble with microcomputer (A/D converter failure) for at least 80 milliseconds.
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.
- 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.