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Home >> Lexus >> 2008 >> IS F >> Repair and Diagnosis >> Steering >> Power Steering >> Power Assist Systems >> Power Steering System >> DTC C1515: Torque Sensor Zero Point Adjustment Undone; DTC C1525 Rotation Angle Sensor Initialization Undone >> Inspection Procedure

Inspection Procedure

  1. INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT 
    1. Initialize the rotation angle sensor and calibrate the torque sensor zero point (See CALIBRATION ).
  2. RECONFIRM DTC 
    1. Check for DTCs (See DTC CHECK/CLEAR )

    Result 

    RESULT CHART

    Result Proceed to
    DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration 3 times*1 A
    DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration 1 or 2 times*2. B
    Normal system code is output C
    HINT
    • *1. The power steering ECU assembly must be replaced if DTCs are still output even after initialize the rotation angle sensor and calibrate the torque sensor zero point
    • *2. Perform the rotation angle sensor initialization and torque sensor zero point calibration again if DTCs are still output even after the initialization and calibration is performed 1 or 2 times.

    B: PERFORM ROTATION ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION  (See CALIBRATION )

    C: END 

    A: Go to next Step 

  3. REPLACE POWER STEERING ECU ASSEMBLY 
    1. Replace the power steering ECU assembly (See POWER STEERING ECU )
  4. INITIALIZE ROTATION ANGLE SENSOR AND CALIBRATE TORQUE SENSOR ZERO POINT 
    1. Initialize the rotation angle sensor value and calibrate the torque sensor zero point (See CALIBRATION )
  5. RECONFIRM DTC 
    1. Check for DTCs (See DTC CHECK/CLEAR )

    Result 

    RESULT CHART

    Result Proceed to
    DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration 3 times*1 A
    DTCs are still output after performing rotation angle sensor value initialization and steering zero point calibration 2 times*2 B
    Normal system code is output. C
    HINT
    • *1 The power steering gear assembly must be replaced if DTCs are still output even after initialize the rotation angle sensor and calibrate the torque sensor zero point
    • *2: Perform the rotation angle sensor initialization and torque sensor zero point calibration again if DTCs are still output even after the initialization and calibration is performed 2 times
    NOTE: If replacing the power steering gear assembly, clear the rotation angle sensor calibration value, initialize the rotation angle sensor value, and calibrate the torque sensor zero point (See CALIBRATION ).

    B: PERFORM ROTATION ANGLE SENSOR INITIALIZATION AND TORQUE SENSOR ZERO POINT CALIBRATION  (See CALIBRATION )

    C: END 

    A: REPLACE POWER STEERING GEAR ASSEMBLY  (See REMOVAL )

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