Kia Sorento: Components Operations
Second Generation XM (2011-2024) / Kia Sorento XM 2011-2024 Service Manual / Body Electrical System / Immobilizer System / Components Operations
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 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).
ERN (Encrypted Randorn Number) value between EMS and encrypted
smartra unit is checked and the validity of coded key is decided by
EMS.
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ENCRYPTED SMARTRA unit(A)
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 (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.
| [Key Type] |
| [Folding Key Type] |
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.
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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 ...
Replacement
Problems And Replacement Parts:
Problem
Part set
Scan tool required?
All keys have been lost
Blank key (4)
YES
Antenna coil unit does n ...
See also:
Blind Spot Detection Switch Circuit Diagram
...
Specifications
Items
Specification
Rated voltage
DC 12V
Operating voltage
9V ~ 16V
Operating speed
30㎞/h ~ 250㎞/h
...
Circuit Diagram
...
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