Kia Forte: Components Operations
Second generation YD (2014-2018) / Kia Forte TD 2014-2018 Service Manual / Body Electrical System / Immobilizer System / Components Operations
ECM (Engine Control Module)
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The ECM(PCM) (A) carries out a check of the ignition key using
a special encryption algorithm, which is programmed into the transponder
as well as the 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 ECM.
ERN (Encrypted Randorn Number) value between EMS and encrypted
Immobilizer unit is checked and the validity of coded key is decided
by EMS.
[1.6 Engine]
[1.6 Engine (FFV)]
[2.0 Engine]
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ENCRYPTED Immobilizer unit (A)
The Immobilizer carries out communication with the built-in transponder
in the ignition key. This wireless communication runs on RF (Radio frequency
of 125 kHz). The Immobilizer 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 Immobilizer 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 Immobilizer 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 ECM and vice versa.
TRANSPONDER
The transponder (A) 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.
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The antenna coil supplies energy to the transponder.
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The antenna coil receives signal from the transponder.
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The antenna coil sends transponder signal to the Immobilizer.
It is located directly on the shroud.
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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 ai ...
Teaching Procedures
1.
Key Teaching Procedure
Key teaching must be done after replacing a defective ECM or when
providing additional keys to the vehicle owner.
The procedure st ...
See also:
Multimedia Jack Circuit Diagram
...
Cylinder Block Installation
1.
Assemble the other parts in the reverse order of disassembly.
In case the cylinder b ...
Relay Box (Passenger Compartment) Inspection
1.
The SJB can be diagnosed by using the GDS. The SJB communicates
with the GDS which then displays inputs and outputs along with codes.
2.
...
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