C. Immobilizer Ignition Key Registration Procedures

This section contains procedures for registering ignition keys for the electronic immobilizer system found on certain 2000 model year Mitsubishi vehicles.

ENCRYPTED CODE REGISTRATION METHOD

Required Special Tool: MB991496: Scan Tool (MUT-II) with correct ROM-Pack

CAUTION
Because registering the encrypted codes is done after all previously-registered codes have been erased, you must have available all keys that have previously been registered to the vehicle.

If the ignition key, Immobilizer-ECU, ECM* or PCM* is replaced or an ignition key is added, encrypted codes of all the ignition keys must be registered. (A maximum of eight different ignition keys can be registered.)

Moreover, when the immobilizer-ECU has been replaced, you will need to use scan tool MB991496 to register the immobilizer-ECU and input the vehicle password (secret code).

NOTE:
If the ECM or PCM is replaced on any 2000 model year immobilizer-equipped vehicle, the immobilizer-ECU should be replaced together with it. Each ECM or PCM has an encrypted code for immobilizer-ECU, and the encrypted code is registered in the immobilizer-ECU.

POINTS TO NOTE DURING OPERATION

1. If none of the functions can be used, check the diagnostic trouble codes and, after carrying out any necessary repairs, repeat the operation.

2. If an incorrect password for key registration is input five times in a row, the immobilizer-ECU judges that an unauthorized operation is being attempted. Start-prevention mode will be set, and engine operation will stop and all special functions will be disabled.

If the ignition switch is turned to "ON" position and left in that position for approximately 20 minutes, "Unauthorized operation, start-prevention mode" will be cancelled.

FUNCTION SELECTION

CAUTION
To prevent damage to scan tool MB991496, always turn the Ignition switch to "LOCK" (OFF) position before connecting or disconnecting scan tool MB991496.

1. Connect scan tool MB991496 to data link connector (16 pin).

2. Turn the ignition switch to "ON" position.

3. This menu is displayed if "SPECIAL FUNCTION" is selected from the immobilizer function menu. Select "Key ID Registr" from the menu, then proceed with the following Key ID Register steps.

NOTE:
The functions displayed will vary depending on the vehicle model.

CAUTION
DO NOT use "2. Password Set" function.
DO NOT change the password. If the password is changed, the next technician will not be able to register ignition keys. The engine ECM and Immobilizer ECU will then have to be replaced

--> KEY ID REGISTER

NOTE:
Using the key ID register function will cause all key IDs that have been previously registered in the immobilizer-ECU to be erased. All keys need to be registered. Those which have been registered before should be on hand before using this function.

NOTE:
If registering more than one key do not disconnect scan tool MB991496 during the registration process.

NOTE:
After registering key IDs, check that the engine can be started using all of the keys that have been registered. If the engine will not start, refer to Immobilizer System Diagnosis in section 54 of the service manual.

1. Connect the MUT-II to DLC. Select Immobilizer, then select "SPECIAL FUNCTION." Select "key ID registr."

2. Input the 4-digit password (NOT the Immobilizer Override Code). Each vehicle has an assigned password which can be found on MEDIC's Diamond Net function, on the Diamond Dealer Link (DDL), or the Mitsubishi Dealer Link (MDL):

^ MEDIC

Click or touch the DIAMOND NET button.
When the menu appears, choose number
10, "Key Registration Password"

^ DDL
Click on: Service Tech/Warranty -> Warranty
Systems, then when the session begins and
the menu appears, choose number 10, "Key
Registration Password".

^ MDL
Click on: Service -> Systems -> Vehicle
Information -> Key Registration Password.

Use the "UP" and "DOWN" keys to input each password digit to a value between 0 and 9. Use the "LEFT" and "RIGHT" keys to move to a different password digit position.

Press the "YES" key to accept the password.

NOTE:
Four separate digits must be input to make up the password.

3. If an incorrect password is input five times in a row, this screen is displayed and the immobilizer-ECU switches to "Unauthorized operation, start-prevention mode."

4. Insert the key to be registered into the ignition switch. Turn the ignition switch to the "ON" position. Press the "YES" key to start key ID registration.

5. This will be displayed when the key ID registration is successful.

If an error occurs during key ID registration, the message "Can't execute" will be displayed. If the key has already been registered, "Key ID has been registered" will be displayed.

6. The number of keys currently registered will be displayed. To register an additional key, replace the ignition key with the next key to be registered within five seconds and then press the "YES" key. Press the "YES" key. Key ID registration screen will be displayed, then register another key.

NOTE:
A maximum of eight different keys can be registered.

7. If key ID registration is complete, press the "NO" key.

8. This completes the registration operation. Turn the ignition switch "LOCK" (OFF) and leave it oft for approximately ten seconds.

9. Check that the engine can be started with each of the ignition keys.

10. Check that the immobilizer system DTC and MFI system DTC do not reset

11. Turn the ignition switch to "LOCK" (OFF) position.

12. Disconnect scan tool MB991496.