Hyundai Tiburon (2003 year). Manual — part 220

IMMOBILIZER STATES

1. Engine Control Module (ECM) States

The ECM has three defined states. These are described below.

State

Description

Virgin State

• The ECM is delivered to HMC in virgin state

• There is no Vehicle Identification Number (VIN) stored in the ECM

• It can only be in virgin state once

• The ECM will allow starting on the second cycle of ignition

• Virgin state is exited when a VIN has successfully been taught by the BCM

Learnt State

Engine start is possible only when the received VIN from the BCM matches that
stored in the ECM

• VIN has been deleted

Neutral State

• Same as virgin state except engine starting not possible on the second cycle of

ignition

• Neutral state is entered if the BCM changes to neutral state

2. Body Control Module (BCM) states

The Body Control Module (BCM) has three defined states. These are described below.

State

Description

Virgin State

• The BCM is set to virgin state during manufacture

• The BCM can be set back to virgin state by issuing an 'Initiate BCM' command

• The diagnostics password is set to the default

• No VIN is stored

• Virgin state is exited only after the VIN been learned

Learnt State

The BCM contains a VIN

Neutral State

• The BCM is set to neutral state by issuing a 'Teaching ECM' command

• The purpose of the neutral state is to allow the ECM to be set to neutral state

• The BCM neutral state expires 10 seconds after an ignition ON

→

OFF cycle

TEACHING PROCEDURES

THE USER PASSWORD CAN BE IN THE STATUS

LIMP HOME FUNCTION

The password and the pin code are not the same. Pin code is scanned from a bar code at the End Of Line (EOL). The
passwordis a number chosen by the owner for the purposes of limp starting.

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Immobilizer System > Components and Components Location

COMPONENTS

COMPONENT

DESCRIPTION

TRANSPONDER (Built-in keys)

When ignition is ON, the coil supplies energy to the
transponder, which in turn accumulates energy in the
condenser.
Once the energy supplied from the coil has stopped,
using the stored energy in the condenser, the
transponder transmits the secret data.
The transponder 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 transpondercan
never be modified or changed.

COIL ANTENNA

Supplies energy to the transponder.
Receives signal from the transponder.
Sends transponder signal to the BCM.

BODY CONTROL MODULE (BCM)

The BCM carries out communication with the built - in
transponder in the ignition key. This wireless
communication runs on RF (Radio Frequency). The RF
signal from the transponder, received by the antenna
coil, is converted into messages for serial
communication by the BCM. And, the received
messages from the ECM are converted into an RF
signal, which is transmitted to thetransponder by the
antenna.
In case of "SMARTRA" type immobilizer system the
BCM 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 andvice versa.

ENGINE CONTROL MODULE (ECM)

In case of "SMARTRA" type immobilizer system the
ECM 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 can the engine be started.
The data of all transponders,which are valid for the
vehicle, are stored in the ECM.

DATA LINK CONNECTOR (DLC)

By connecting the voltmeter or Hi-scan, the control
module diagnostic code can be read.