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, and it uses this signal to control motor torque.

When an abnormal signal is output from the R/D converter for a set time or more 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 more, or when the motor rotation number calculated from the motor rotor position sensor and the engine rotation number is compared and found to deviate a set amount or more and it continues 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 seconds within 0.5 seconds.
- The output voltage to the motor rotor position sensor is 0.1 V or less for at least 0.5 seconds.
- The input voltage to the motor rotor position sensor is 1.2 V or less for at least 0.5 seconds.
- 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 illuminating the MIL
When a malfunction is detected, the MIL comes on and the DTC and the freeze frame data are stored in the PCM and MCM memory.

Conditions for clearing the MIL
The MIL will be cleared if the malfunction does not recur during three consecutive trips in which the diagnostic runs.

The MIL, the DTC, and the freeze frame data can be cleared by using the scan tool Clear command or by disconnecting the battery.