Kia Forte: 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. |
Transponder (TP) – IMMO ECU Communication

TP Read Protocol
(1) |
IMMO_ECU after IGN on(or CPU Reset cancellation) is sent
Challenge to TP and confirmed Serial Number and Signature.
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(2) |
When response of input transponder is not correct, input
is retry.
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(3) |
When response of input transponder is correct, The data
that calculate Encryption operation in the EEPROM program compared
with received data from TP.
When Codes is same, input is finished.
If the codes are not same, input are continued until when
codes are same.
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(4) |
If IMMO_ECU EEPROM code is not programming, when correct
transponder is inputted (CRC Check OK), input is finished.
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(5) |
After IGN1 on(CPU Reset cancellation), IMMO_ECU is reading
the maximum 5times Transponder Code
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(6) |
In the IGN1 ON&EMS_state=Lock state, when received ANKNOWLEDGE,
TP is re-authenticated

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2. |
TP / IMMO ECU / EMS Authentication Flowchart

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ECM (Engine Control Module)
1.
The ECM(PCM) (A) carries out a check of the ignition key using
a special encryption algorithm, which is programmed into the transponder
...
See also:
Injector Description
Based on information from various sensors, the ECM can calculate the fuel
amount to be injected. The fuel injector is a solenoid-operated valve and the
fuel injection amount is controlled by ...
Warning lights
✽ NOTICE - Warning lights
Make sure that all warning lights are OFF after starting the engine. If any
light is still ON, this indicates a situation that needs attention.
Air bag Warning Ligh ...
Limp Home Function
1.
Limp Home By Tester
If the ECM detects the fault of the Immobilizer or transponder,
the ECM will allow limp home function of the immobilizer. Limp home
is o ...