System Description

GENERAL
1. The steering lock system consists of a starter switch, interlock cable, steering lock actuator, and steering lock ECU. The steering lock ECU is built into the steering lock actuator.
2. This system is provided in models with a smart key system.
STEERING LOCK ECU
1. The steering lock ECU is integrated with the immobilizer ECU and controls both steering lock and engine immobilizer.
  The theft deterrent ECU checks the ID code of the ignition key and transmits its signal to the steering lock ECU. Then, the steering lock ECU transmits an engine start authorization signal to the ECM and a motor activation signal to the steering lock motor.
STARTER SWITCH
1. The starter switch consists of a starter switch knob and a rotor.
  The tip of the interlock cable is fitted into the groove on the rotor. When the starter switch knob is turned, the rotor turns, pulling on the interlock cable fitted into the rotor groove.
  
  Fig 1: Locating Rotor
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
STEERING LOCK ACTUATOR
1. The steering lock actuator consists of a steering lock motor, gear, cam, steering lock bar, and starter switch lock lever.
  In the steering lock system, the steering lock motor operates in accordance with signals from the steering lock ECU. This causes the gear to rotate as well as the cam that is integrated with the gear, and the cam pushes the steering lock bar up, disengaging it from the steering lock holder.
  
  Fig 2: Identifying Steering Lock Actuator
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
INTERLOCK CABLE
1. The steering lock actuator and the starter switch are connected by the interlock cable and thereby they operates as shown in the figure Fig 3 below.
  
  Fig 3: Interlock Cable Function Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 4: Identifying Steering Lock System Activated
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002