Join Date: May 2003
Location: santa maria, CA
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
||LinkBack||Thread Tools||Display Modes|
ELECTRICAL TROUBLESHOOTING MANUAL
Applies to: Elantra 2001
Body Electrical System Immobilizer Control System
IMMOBILIZER CONTROL SYSTEM SCHEMATIC
IMMOBILIZER CONTROL SYSTEM (1)
The Immobilizer Control System (ICS) is an anti-theft device that enables starting to be possible only when the mechnical and wireless secret code (memorized in the ECM and SMARTRA), are aligned simultaneously. The transponder (built -in the ignition key head) sends a unique frequency code signal to the SMARTRA (SMARt TRansponder Antenna).
The SMARTRA compares the received signal with the memorized code and communicates with the ECM, controls the engine management system through fuel injection control, via a dedicated communication line. When the code is aligned, the ECM sends a starting signal and the engine starts.
once again, right from webtech[body]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 starts with an ECM request for vehicle specific data from the tester. The "virgin" ECM stores the vehicle specific data and the key teaching can be started. The "learnt" ECM compares the vehicle specific data from the tester with the stored data. If the data are correct, the teaching can procede.
If incorrect vehicle specific data have been sent to the ECM three times, the ECM will reject the request of key teaching for one hour. This time cannot be reduced by disconnecting the battery or any other manipulation. After reconnecting the battery, the timer starts again for one 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 in the transponder. Then the ECM runs the authentication required for confirmation of the teaching process. The successful programming is then confirmed by a message to the tester.
If the key is already known to the ECM from a previous teaching, the authentication will be accepted and the EEPROM data are updated. There is no changed transponder content (this is impossible for a learnt transponder).
The attempt to repeatedly teach a key, which has been taught already during the same teaching cycle, is recognized by the ECM. This rejects the key and a message is sent to the tester.
The ECM rejects invalid keys, which are presented for teaching. A message is sent to the tester. The key can be invalid due to faults in the transponder or other reasons, which result from unsuccessful programming of data. 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 status 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 tester procedure will be stopped and a specific fault code will be stored at ECM.
2. User Password Teaching Procedure
The user password for limp home is taught at the service station. 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 status of the password is "virgin". No limp home function is possible.
The teaching is started by ignition on, with a valid key and sending the user password by tester. After successful teaching, the status of the user password changes from "virgin" to "learnt".
The learnt user password can also be changed. This can be done if the user password status is "learnt" and the tester sends authorization of access, either the old user password or the vehicle specific data. After correct authorization, the ECM requests the new user password. The status remains "learnt" and the new user password will be valid for the next limp home mode.
If incorrect user passwords or wrong vehicle specific data have been sent to the ECM three times, the ECM will reject the request to change the password for one hour. This time cannot be reduced by disconnecting the battery or any other actions. After reconnecting the battery, the timer starts again for one hour.
The user password can be in the status
00. Not yet checked
The status is stored in the EEPROM. In case of incorrect or no plausible data from this circuit, the ECM cannot check the status and the ECM sends 00.
The password has been taught successfully to the ECM.
This is the status at the end of the ECM production line before delivery to the final customer.
04. Locked by timer
After a certain number of incorrect inputs, the ECM is locked for one hour and no inputs are accepted during this time.
05. Teaching not accepted
This status is set if, for example, the ECM is in neutral status.[/body]
more from the hyundai geniuses[body]1. By tester
If the ECM detects a fault of SMARTRA or transponder, the ECM will allow limp home function of immobilizer. Limp home is only possible if the user password (4 digits) has been given to the ECM before. This password can be selected by the vehicle owner and is programmed at the service station.
The ECM informs the driver about the limp home condition by blinking the immobilizer indicator. Then the user password can be sent to the ECM via the special tester menu.
Only if the ECM is in status "learnt" and the user password status is "learnt" and the user password is correct will the ECM be unlocked for a period of time (30 sec.). The engine can only be started during this time. After the time has elapsed, engine start is not possible.
If the wrong user password is sent, the ECM will reject the request of limp home for one hour. Disconnecting the battery or other actions cannot reduce this time. After connecting of battery to ECM, the timer starts again for one hour.
2. By ignition key
The limp home can be activated also by the ignition key. The ECM informs the driver by blinking the immobilizer indicator for the limp home condition. Then the user password can be input to ECM can be done by special sequence of ignition on/off.
Only if the ECM is in status "learnt" and the user password status is "learnt" and the user password is correct will the ECM be unlocked for a period of time (30 sec.). The engine can be started during this time. After the time has elapsed, engine start is not possible. After a new password has been input the timer (30 sec.) start again.
After ignition off the ECM is locked (If timer 8 sec. is elapsed). For next start the input of user password is requested again.
REPLACEMENT OF ECM AND SMARTRA
In case of a defective ECM, the unit has to be replaced by "virgin" or "neutral" ECM. All keys have to be programmed into the new ECM. Keys, which are not programmed into ECM, are invalid for the new ECM. Refer to key teaching procedure . The vehicle specific data have to be left unchanged due to the unique programming of transponder.
In case of a defective SMARTRA, there is no special procedure required. A new SMARTRA device simply replaces the old one. There are no transponder - related data stored in this device.
NEUTRALISING OF ECM
The ECM can be set to the "neutral" status by a tester.
A valid ignition key is inserted and after ignition on is recorded, the ECM requests the vehicle specific data from the tester. The communication messages are described at " Neutral Mode". After successfully receiving the data, the ECM is neutralized.
The ECM remains locked. Neither the limp home mode nor the "twice ignition on" function is accepted by ECM.
The teaching of keys follows the procedure described for virgin ECM. The vehicle specific data have to be unchanged due to the unique programming of transponder. If data should be changed, new keys with virgin transponder are requested.
Originally posted by bizzare
Well i got a fickin accent so now i just got a fucking pile of sh** in my drive way with a beta swap, that wont start. Now i dont have a ride to work, or anywhere for that matter, No money to put it back to stock, or to buy another engine, oh yea but i still got to pay 218 a month for it, not to mention the god damned tags that i have to buy cuz they expire this month.
|Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)|