Advanced Diagnostics

Advanced Diagnostics - DTC P0A3F (89): Motor Rotor Position Sensor Circuit Malfunction






General Description
The motor control module (MCM) obtains the magnetic pole position signal of the motor rotor using the motor rotor position sensor to control motor torque. When an abnormal signal is output from the R/D converter for a set time during each monitoring period, which is repeated, or when the input/output voltage of the motor rotor position sensor is abnormal for a set time, or when the IMA motor speed calculated from the motor rotor position sensor and the engine speed is compared and found to deviate a set amount for a set time, a malfunction is detected and a DTC is stored.

Monitor Execution, Sequence, Duration, DTC Type, OBD Status






Enable Conditions






Malfunction Threshold
One of these conditions occurs:
- An abnormal signal is output from the R/D converter for at least 0.4 second within 0.5 second.
- A parity error signal from the R/D converter is detected 4,500 times within 1 second.
- The input voltage from the motor rotor position sensor is 1.26 V or less for at least 0.5 second.
- The difference between the IMA motor speed and the engine speed is 600 rpm or more for at least 2 seconds when the engine speed is 500 rpm or more.

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 MCM 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 or by disconnecting the battery.