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System Description

WARNING: This page is about a different car, the 2011 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.
  1. DESCRIPTION 
    1. The steering lock system locks/unlocks the steering lock by activating the steering lock bar with a motor. The steering lock ECU activates the motor based on signals from the certification ECU and power source control ECU.
  2. FUNCTIONS OF COMPONENTS 
    1. The steering lock ECU controls the system based on information from the following components.
      Item Function
      Steering lock actuator assembly Consists of a motor, lock, bar, lock/unlock position sensors, etc. Activated by the steering lock ECU.
      Steering lock ECU Included in the steering lock actuator assembly. Activates the steering lock motor based on permission signals from the power source control ECU and certification ECU. Detects steering lock/unlock positions and transmits the status to other ECUs.
      Power source control ECU Permits the steering lock ECU to supply power to activate the motor. The power source control ECU and certification ECU permit engine start after receiving an unlock signal from the steering lock ECU.
      Certification ECU Orders the steering lock ECU to lock/unlock the steering lock. The power source control ECU and certification ECU permit engine start after receiving an unlock signal from the steering lock ECU.
      IG2 relay Controlled by the power source control ECU. Sends IG signals to the steering lock ECU.
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