Hyundai Accent: Description
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 passive 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 GDS 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) (A) carries out a check of the ignition key using
a special encryption algorithm, which is programmed into the transp ...
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