DTC P0A4B
DTC P0A4B: Generator Motor Rotor Position Sensor Circuit
General Description
The power control unit (PCU) detects the generator motor rotor position by the R/D converter based on the generator motor motor rotor position sensor signals. If the tracking loop abnormal bit detection counter exceeds 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 | 310 milliseconds or more |
| DTC Type | One drive cycle, MIL on, POWER SYSTEM indicator on |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage | 8 V | - |
Malfunction Threshold
R/D converter tracking loop abnormal bit is as 1 for at least 310 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.
- Generator motor motor rotor position sensor line failure
- Generator motor motor rotor position sensor 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.