LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2009 >> Prius Base >> Repair and Diagnosis >> Steering >> Power Steering >> Electronic Power Steering System >> Calibration
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Electronic Power Steering System: Calibration

  1. INITIALIZATION OF TORQUE SENSOR ZERO POINT CALIBRATION SIGNAL 
    NOTE: Under the following conditions, perform the torque sensor zero point calibration after initializing the torque sensor zero point calibration signal in the ECU:
    • The steering column (containing the torque sensor) has been replaced.
    • The power steering ECU has been replaced.
    • The steering wheel has been replaced.
    • The steering gear assembly has been replaced.
    • There is a difference in right and left steering effort.
    1. Center the steering wheel and align the front wheels straight ahead.
    2. Connect the Techstream (with CAN VIM) to the DLC3.
    3. Turn the power switch ON (IG) and then initialize the torque sensor zero point calibration signal by following the directions on the Techstream screen.
      NOTE: Do not turn the steering wheel while initializing the zero point calibration signal.
    4. Perform steering zero point calibration after turning the power switch OFF.
      NOTE: Zero point calibration cannot be carried out with the power switch ON (IG) after initialization of the zero point calibration signal is completed.
  2. TORQUE SENSOR ZERO POINT CALIBRATION 
    1. Center the steering wheel and align the front wheels straight ahead.
    2. Connect the Techstream (with CAN VIM) to the DLC3.
    3. Turn the power switch ON (IG) and then perform the zero point calibration by following the directions on the Techstream screen.
      NOTE:
      • The vehicle is stopped.
      • Do not start the engine. (Do not turn the power switch ON (READY).
      • Do not turn the steering wheel.
      • The vehicle is on level ground.
    4. Confirm that no DTCs are output after completing the operation.
      1. When DTC C1515 is output, refer to the following procedures (see DTC C1515 TORQUE SENSOR ZERO POINT ADJUSTMENT UNDONE ).
      2. When DTC C1516 is output, refer to the following procedures (see DTC C1516 TORQUE SENSOR ZERO POINT ADJUSTMENT INCOMPLETE ).
      3. When DTC C1534 is output, refer to the following procedures (see DTC C1531 ECU MALFUNCTION; DTC C1532 ECU MALFUNCTION; DTC C1533 ECU MALFUNCTION; DTC C1534 ECU MALFUNCTION ).
scientia non olet · About LEMON Manuals