STEERING COLUMN SYSTEM


  1. FUNCTION OF MAIN COMPONENTS

    Component Function
    Electric Power Steering Column Sub-assembly Tilt Motor and Telescopic Motor Adjusts the position of the electric power steering column sub-assembly in accordance with the voltage output of the multiplex tilt and telescopic ECU.
    Tilt Position Sensor Detects the rotation signal of the tilt motor and informs the multiplex tilt and telescopic ECU.
    Telescopic Position Sensor Detects the rotation signal of the telescopic motor and informs the multiplex tilt and telescopic ECU.
    Tilt and Telescopic Switch Sends a switch signal to the multiplex tilt and telescopic ECU depending on the switch operation.
    Multiplex Tilt and Telescopic ECU

    • Sends the driver seat belt buckle switch signal to the multiplex tilt and telescopic ECU.

    • Calculates the automatic control (auto away and auto return) seat movement amount and sends the value to the multiplex tilt and telescopic ECU.
    Driver Control Switch Assembly Sends a seat memory switch signal to the multiplex tilt and telescopic ECU.
    Power Seat Switch Position Control ECU Detects the driver's seat position.
    Certification ECU (Smart Key ECU Assembly) Sends a power switch signal to the multiplex tilt and telescopic ECU.

  2. SYSTEM CONTROL


    1. The power tilt and telescopic system has the following control functions:

      Component Function
      Manual Control The tilt and telescopic positions can be adjusted using the tilt and telescopic switch.
      Automatic Control Auto Away When exiting the vehicle, if the power switch is turned off and the driver seat belt is unbuckled, the steering wheel assembly will be moved to the highest tilt level and will be fully retracted telescopically.
      Auto Return When entering the vehicle, if the power switch is turned on (IG) or the driver seat belt is buckled, the steering wheel assembly will be returned to the position it was in before the operation of the auto away function (multiplex tilt and telescopic ECU memory position).
      Memory Control The memory function can store the driver seat position and tilt and telescopic position.

  3. FAIL-SAFE


    1. When the multiplex tilt and telescopic ECU detects a malfunction in the power tilt and telescopic system, the ECU changes to fail-safe mode. For details, refer to the Repair Manual.

  4. DIAGNOSIS


    1. If the multiplex tilt and telescopic ECU detects a malfunction in the power tilt and telescopic system, the ECU stores the malfunction data in memory. Then, by connecting the TechStream to the DLC3, the Diagnostic Trouble Code (DTC) can be accessed and an Active Test can be performed to test the operation of the tilt motor and the telescopic motor. For details, refer to the Repair Manual.