2012 Toyota Matrix Base, Automatic TransFACTORY OEM SERVICE PROCEDURE

Power Steering System: Calibration: Calibration

  1. ROTATION ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION (USING TECHSTREAM) 
    NOTE:

    Clear the rotation angle sensor calibration value, initialize the rotation angle sensor, and calibrate the torque sensor zero point if any of the following has occurred:

    • The power steering ECU has been replaced.
    • The power steering link assembly has been replaced.
    • Steering effort differs between left and right.
    1. Inspection before calibration
      1. Turn the ignition switch off.
      2. Connect the Techstream to the DLC3.
      3. Turn the ignition switch to ON.
      4. Turn the Techstream on.
      5. Enter the following menus: Chassis / EMPS / Data List. Check the values by referring to the table below.
        EMPS

        Tester Display Measurement Item/Range Normal Condition Diagnostic Note
        IG Power Supply ECU power source voltage/
        Min.: 0 V
        Max.: 20.1531 V        		 9 to 16 V Ignition switch ON

        Standard voltage

        9 to 16 V

        NOTE:

        If the IG power supply voltage is 9 V or less, calibration cannot be performed. In this case, charge or replace the battery, and then perform calibration.

    2. Rotation angle sensor calibration value clear, rotation angle sensor initialization, and torque sensor zero point calibration.
      NOTE:
      • If DTC C1516 (Torque Sensor Zero Point Adjustment Incomplete) is stored, the torque sensor zero point cannot be calibrated. Clear the DTC before starting calibration.
      • If DTC C1526 (Rotation Angle Sensor Initialization Incomplete) is stored, the rotation angle sensor cannot be initialized. Clear the DTC before starting initialization.
      1. Turn the ignition switch off.
      2. Connect the Techstream to the DLC3.
      3. Turn the ignition switch to ON.
      4. Turn the Techstream on.
      5. Enter the following menus: Chassis / EMPS / Utility / Torque Sensor Adjustment.
        NOTE:
        • Center the steering wheel and align the front wheels straight ahead.
        • Do not turn the steering wheel sharply.
        • Do not touch the steering wheel during the torque sensor zero point calibration (for 3 seconds).
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.