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Variable Gear Ratio Steering System: Initialization

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.
  1. STEERING ANGLE SENSOR INITIALIZATION (to obtain a tire angle (during straight-ahead driving) signal) 
    1. Turn the power switch ON (IG), and check that the master warning light illuminates for a few seconds.
      NOTE: If the warning light remains on or blinks, repair the applicable system.
    2. Drive the vehicle on a straight road at 35 km/h (22 mph) or more for 5 seconds or longer
      Fig 1: Identifying Master Warning Light
      G05782326Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

      • At this point, the steering wheel will still remain off-center by 5 to 10°.
      • In this step, the neutral position of the steering wheel is restored from the steering control ECU memory
    3. Confirm that steering angle sensor initialization is completed (using the tester).
      1. Intelligent tester - Enter the VGRS menu using the tester. Select "STRAIGH ANG FLG" from "DATA LIST" Check if the steering angle sensor has obtained a tire angle (during straight-ahead driving) signal

        Standard: "VALID" is displayed on the tester screen. 

      2. Techstream - Enter the VGRS menu using the tester Select "Straight Angle Valid Flag" from "Data List" Check if the steering angle sensor has obtained a tire angle (during straight-ahead driving) signal.

        Standard: "Valid" is displayed on the tester screen. 

    4. Confirm that steering angle sensor initialization is completed (not using the tester)
      1. Stop the vehicle (power switch turned to ON (READY))
      2. Slowly turn the steering wheel from lock to lock
      3. If it turns approximately 2.7 turns, steering angle sensor initialization is completed. If it turns approximately 3 2 turns, steering angle sensor initialization is not completed
        NOTE: If the steering wheel turns approximately 3.2 turns, drive the vehicle on a straight road at 35 km/h (22 mph) or more for 5 seconds or longer. Then confirm the initialization again.
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