The engine immobiliser system is designed to prevent the vehicle from being stolen. This system uses a transponder key ecu that stores the key codes of authorized ignition keys. If an attempt is made to start the engine using an unauthorized key, the ecu sends a signal to the ecm to prohibit fuel delivery and ignition, effectively disabling the engine.

The transponder key coil receives this signal, the transponder key amplifier amplifies it, and then the signal is transmitted to the ecu. The ecu matches the key's id code with the vehicle's id code, which was previously registered in the ecu and then communicates the results to the ecm using sfi communication.
Engine immobiliser system
How to proceed with troubleshootingFor safe driving
For safe driving, adjust the
seat and mirror to an appropriate
position before driving.
Correct driving posture
Adjust the angle of the seatback
so that you are sitting
straight up and so that you do
not have to lean forward to
steer.
Adjust the seat so that you
can depress the pedals full ...
Throttle actuator control system
Description
The throttle actuator is operated by the ecm, and opens and closes the
throttle valve using gears. The
opening angle of the throttle valve is detected by the throttle position (tp)
sensor, which is mounted on
the throttle body. The tp sensor provides feedback to the ecm in ord ...
Disposal
Hint:
When scrapping a vehicle equipped with an srs or disposing
of the curtain shield airbag assembly, be sure to deploy the
airbag first in accordance with the procedure described
below. If any abnormality occurs with the airbag deployment,
contact the service dept. Of toyota motor sales,
u. ...