Ignition Switch & Locking Mechanism
The ignition switch assembly also has a locking mechanism which works in conjunction with the immobilization ECU and the steering lock ECU. See Fig 1. The ignition switch mechanism comprises an ignition switch lock solenoid actuator which prevents the ignition switch being rotated unless the key has been recognized by the immobilization ECU. A Hall sensor is located in the ignition switch body and senses the rotation of the ignition switch. This signal is transmitted on the K-bus and is used by the steering lock ECU to confirm the key status with the immobilization ECU. Refer to Operation later in this section for functional description.