The immobilizer system
will disable the vehicle unless the proper ignition key is used, in
addition to the currently available anti-theft systems such as car alarms,
the immobilizer system aims to drastically reduce the rate of auto
theft.
| 1. |
Encrypted SMARTRA type
immobilizer
| A. |
The SMARTRA system consists of a
passivie challenge - response (mutual
authentication)transponder located in the ignition key, an
antenna coil, a encoded SMARTRA unit, an indicator light and
the PCM(ECM). |
| B. |
The SMARTRA communicates to the PCM(ECM)
(Engine Control Module) via a dedicated communications line.
Since the vehicle engine management system is able to control
engine mobilization, it is the most suitable unit to control
the SMARTRA. |
| C. |
When the key is inserted in the ignition
and turned to the ON position, the antenna coil sends power to
the transponder in the ignition key. The transponder then
sends a coded signal back through the SMARTRA unit to the
PCM(ECM). |
| D. |
If the proper key has been used, the
PCM(ECM) will energize the fuel supply system. The immobilizer
indicator light in the cluster will simultaneously come on for
more than five seconds, indicating that the SMARTRA unit has
recognized the code sent by the
transponder. |
| E. |
If the wrong key has been used and the
code was not received or recognized by the PCM(ECM) the
indicator light will continue blinking for about five seconds
until the ignition switch is turned
OFF. |
| F. |
If it is necessary to rewrite the
PCM(ECM) to learn a new key, the dealer needs the customer's
vehicle, all its keys and the Hi-scan (pro) equipped with an
immobilizer program card. Any key that is not learned during
rewriting will no longer start the
engine. |
| G. |
The immobilizer system can store up to
eight key codes. |
| H. |
If the customer has lost his key, and
cannot start the engine, contact Hyundai motor service
station. |
|
PCM (Power Train Control Module)
| 1. |
The PCM(ECM) carries out a check of the
ignition key using a special encryption algorithm, which is
programmed into the transponder as well as the PCM(ECM)
simultaneously. Only if the results are equal, the engine can be
started. The data of all transponders, which are valid for the
vehicle, are stored in the PCM(ECM).
|
SMARTRA unit (B)
The SMARTRA carries out
communication with the built-in transponder in the ignition key. This
wireless communication runs on RF (Radio frequency of 125 kHz). The
SMARTRA is mounted behind of the crash pad close to center cross bar.The
RF signal from the transponder, received by the antenna coil, is converted
into messages for serial communication by the SMARTRA device. And, the
received messages from the PCM(ECM) are converted into an RF signal, which
is transmitted to the transponder by the antenna.The SMARTRA does not
carry out the validity check of the transponder or the calculation of
encryption algorithm. This device is only an advanced interface, which
converts the RF data flow of the transponder into serial communication to
the PCM(ECM) and vice versa.
TRANSPONDER (Built-in keys)
The transponder has an
advanced encryption algorithm. During the key teaching procedure, the
transponder will be programmed with vehicle specific data. The vehicle
specific data are written into the transponder memory. The write procedure
is once only; therefore, the contents of the transponder can never be
modified or changed.
Antenna coil
The antenna coil (A) has
the following functions.
| - |
The antenna coil supplies energy to the
transponder. |
| - |
The antenna coil receives signal from the
transponder. |
| - |
The antenna coil sends transponder signal to
the SMARTRA.
It is located directly in front of the
steering handle lock. |
