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)

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]

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.

-	The antenna coil supplies energy to the transponder.

-	The antenna coil receives signal from the transponder.

-	The antenna coil sends transponder signal to the Immobilizer. It is located directly on the shroud.

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 ...

Kia Forte: Components Operations

Description

Teaching Procedures

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