The coil antenna has the following functions.

1. The coil antenna supplies energy to the transponder.

2. The coil antenna receives signal from the transponder.

3. The coil antenna sends transponder signal to the ICU.

It is located directly in front of the steering handle lock.

This DTC is defined as Antenna coil open or short circuit.

3.

ICU : VIN - It is Vehicle ID number which consists of ID code and password,not the vehicle body number,

(1)

Virgin (This is status that ICU does not memorize VIN)

(2)

Neutral (This is a status that VIN is erased on the ICU by special command from scantool)

(3)

Learnt (This is a status that VIN is learnt on the ICU by special command from scantool )

(4)

Not yet checked (The status is stored in permanent memory (EEPROM or Flash etc.).

In case of not plausible data from this circuit the ICU cannot check the status.

(5)

Locked by timer (After a certain number of incorrect user Password(4) or PIN Code(6)

the ECM is locked for one hour and no inputs are accepted during this time)

4.

Learnt Status.

a.

After Replacing new "ECM" scantool displays that ECM is Virgin status in Key Teaching mode“VIRGIN”status means that ECM has not matched any PIN Code before.

caution

Key Teaching Procedure

Key teaching must be done after replacing a faulty ECM or when providing additional keys to the vehicle owner.

The procedure starts with an ECM request for vehicle specific data from the scanner. The "Virgin" ECM stores the vehicle specific data and key teaching can be started.

The "Learnt" ECM compares the vehicle specific data from the scanner with the stored data. If the data are matched, key teaching can be started.

If incorrect vehicle specific data have been sent to the ECM 3 times, The ECM will reject the request of key teaching for 1 hour. This time cannot be reduced by disconnecting the battery or any other manipulation. If the battery be detached, the timer starts again for 1 hour.

The key teaching is done by ignition on with the key and additional tester commands. The ECM stores the relevant data in the EEPROM and the transponder.

Then the ECM runs the required authentication for confirmation of the teaching process. The successful programming is confirmed by a message to the scanner.

It is impossible to change a data in learnt transponder.

The attempt to repeatedly teach a key, which has been taught already during the same teaching cycle, is recognized by the ECM.

If the ECM detects different authenticators of a transponder and an ECM, the key is considered to be invalid. The maximum number of taught keys is 4.

If an error occurs during the Immobilizer Service Menu, the ECM remains unchanged and a specific fault code is stored. If the ECM status and the key status do not match for teaching of keys, the scanner procedure will be stopped and a specific fault code will be stored at ECM.

This function is for neutralizing the ICU and ECU.

When replacing the ICU and ECM, The ICU and ECM need neutralizating by scanner.

When neutralizating immobilizer system, EEPROM datas(VIN code, Password, Pin code, Key data) in the immo are erased.

After doing neutralization of ICU by scanner, It is neccessary to turn the key "OFF → ON" . Because ECM is neutralized by ICU.

caution

●Neutralizing setting condition

- In case of ECM status "Learnt" regardless of user password "Virgin or Learnt"

- Input correct PIN code by scanner

- Neutralizing meaning

: PIN code(6) & user password(4) deletion

: Locking of ECM(except key teaching permission)

The user password is used only for limp home function.The user password is taught by a scanner. The owner of the vehicle can select a number with four digits.User password teaching is only accepted by a " learnt" ECM. Before first teaching of user password to an ECM, The password teaching/changing is started by ignition on, with a valid key and sending the user password by scanner. After successful teaching, the status of the user password changes from "virgin"to "learnt". The learnt user password can also be changed.

If incorrect user passwords or wrong vehicle specific data have been sent to the ECM three times continuously, the ECM will reject the request to change the password for one hour(Locked by timer).If the key turn off, Data of " incorrect count =2" is erased automatically.This time can not be reduced by disconnectiong the battery or any other actions. After reconnecting the battery, the timer starts again for one hour.

6.

Password Teaching

7.

Password Changing

1). Locking of EMS

If engine shut off (Ignition off by key), the ECM is locked from now on.

If the timer is more than 30sec without Cranking in Ignition status “ON” by Valid Key, ECM have to do new authentication if user attempts engine start.

In case of engine stalling about start of limp home the timing of EMS locking is as follows:

-Without ignition off there is the time limited by immo system(30 sec) for repeated engine start, after ignintion off the time for repeated engine start is limited to 8 sec.

-After elapsing this time new authentication is done or in case of limp home the input of user password is requested again.

caution

●Locked by timer condition

- Input incorrect user password(4) or pin code(6)

- Locked by timer meaning : Locking of EMS

- Locked by timer release

: Ignition ON ≥ More than 1 hour regardless of ignition ON/OFF

: After 1 hour, ECM should reset incorrect data counter(PIN & User password)

2) Limp home by scanner

If the ECM detects a fault of antenna coil or transponder, the ECM will allow limp home functio of immobilizer.Limp home is only possible if the user password(4 digits) has been taught to the ECM before. This password can be defined by vehicle owner and is programmed by scanner.The ECM informs the driver about the limp home condition by blinking Immobilizer lamp. Then the user password can be sent to ECM by scanner.Only if the ECM is in status "Key(TP) learnt" and the user password status is "learnt" and the user password is the correct one, the ECM is unlocked for the time 30 sec. The engine can only be started during this time. After elapsing of timer no engine start is possible.If wrong user passwords have been sent to ECM three times, the ECM will reject the request of limp home for one hour. Disconnecting the battery or other manipulation cannot reduce this time.After the connecting of battery to ECM the timer starts again for one hour.

caution

●Limp home condition

- ECM status PIN code & user password "Learnt"

- Antenna coil and transponder error

- Input correct user password(4) by scanner or key after IMMO lamp 5 times blinking(50 % duty)

- Unlocking of ECM is allowed(up to 255 times)

●Unlocking time of ECM : 30 sec

●Unlocking release condition after engine running by limp home : IGN OFF ≥ 8 sec

●Unlocking time(30 sec) resetting of ECM :

- Suddenly ENG stall in limp home mode

- IGN OFF ≤ 8 sec in limp home mode

3) Limp home by Ignition key

The limp home can be activated also by the ignition key. The ECM informs the driver by blinking immobilizer lamp about the limp home condition. Then the input of user password to ECM can be done by special sequence of ignition on/off.Only if the ECM status "learnt" and the user password status is "learnt" and the user password is the correct one, the ECM is unlocked for the time 30 sec. The engine can be started during this time. After elapsing of timer, Engine start is impossible. After new input of user password, The timer(30 sec) starts again. After ignition off, the ECM is locked[If timer(30 sec) is elapsed.]. For next start, The input of user password is requested again.