Immobilizer ECU User's Manual
USRSMANUAL_22302.DOC
Model：IMB223-02
1. General
The immobilizer system is an electronic anti-theft system. This system prevents the engine from
unauthorized starting such as hot-wiring, etc. The engine would not start until the ID code registered
in the ignition key coincides with the code registered in the immobilizer ECU on the vehicle.
Immobilizer ECU
Engine ECU
Key ring antenna
＋
Steering handle lock
MUT
Transponder key
Major components and functions
Name
Function
Transponder
・Sends ID code to the immobilizer ECU via key ring antenna.
Key ring antenna
・Supplies power and sends / receives data to and from the transponder by means
of electromagnetic coupling
Immobilizer ECU
・Receives the ID code from the transponder and compares it with the code
registered in the immobilizer ECU.
・Sends the condition code to the engine ECU.
Engine ECU
[Functions related to the immobilizer system]
・Receives the condition code from the immobilizer ECU and operates to prepare
/ prohibit the start of the engine.
Handling precaution
(1) When starting the engine, keep metal objects (iron, etc.), electric equipment (cellular phone, electric
razor, etc.) and other immobilizer keys away from the steering handle lock.
(2) Never damage the plastic key bow with a knife or fill transponder or similar articles inside.
