C. Immobilizer Ignition Key Registration
This section contains procedures for registering ignition keys for the electronic immobilizer system found on certain 2002 model year Mitsubishi vehicles.(1) ENCRYPTED CODE REGISTRATION METHOD:
The ENCRYPTED CODE REGISTRATION METHOD which requires the use of the MUT-II scan tool and the vehicle-specific password, should be used when only one of the previously registered transponder keys is available for re-registration or if all previously registered keys are lost and you are programming all new keys.
^ (2) ADDITIONAL KEY REGISTRATION METHOD:
For 2002 model year, the Immobilizer ECU will allow registration of additional ignition keys using the new ADDITIONAL KEY REGISTRATION METHOD. By using this method, the MUT-II scan tool and a password are not needed if at least TWO originally registered keys are available
(1) ENCRYPTED CODE REGISTRATION METHOD Using Scan Tool (ONE OR NO REGISTERED KEYS ARE AVAILABLE
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*
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).
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 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 message 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 off 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.
(2) Additional Key Registration Method (without MUT-II and password) - AT LEAST TWO (2) REGISTERED KEYS ARE AVAILABLE
The Immobilizer system in 2000 and 2001 model year vehicles requires that ALL ignition keys, both existing and new, must be registered with the Immobilizer ECU using the MUT-II scan tool and a password, if an ignition key is lost or if additional keys are needed. For 2002 model year, the Immobilizer ECU will allow registration of additional ignition keys using the new ADDITIONAL KEY REGISTRATION METHOD. By using this method, the MUT-II scan tool and a password are not needed if at least TWO originally registered keys are available.
NOTE:
If any originally registered key is lost, and there is only one original key available, the current MUT-II scan tool procedures must still be used to add new keys and re-register the remaining original key
NOTE:
At least TWO originally registered keys must be available to use the following procedures.
1. Turn the ignition switch ON with the first key (key-A). This key must be one of the originally registered ignition keys.
2. If the first key is correctly registered, the Immobilizer-ECU will go into waiting status for the second key (key-B). The ignition must be in the ON position with key-A inserted for at least 5-seconds for the ECU to go into waiting status.
3. Turn the ignition switch to OFF, remove key-A, then insert key-B. Turn the ignition switch to ON, using key-B within 7-seconds.
NOTE:
Key-B must be an originally-registered key If there is no second originally registered key, refer to section C (1), ENCRYPTED CODE REGISTRATION METHOD, of this bulletin or the appropriate service manual and register all keys using the current MUT-II/password method.
4. If both key-A and key-B are correctly registered, the Immobilizer indicator lamp will blink twice. This signals that the Immobilizer-ECU has entered the ADDITIONAL KEY REGISTRATION MODE.
5. Turn the ignition switch to OFF. Insert the new key to be registered into the ignition switch and turn the switch ON within 7-seconds. The new key is now registered to the vehicle. The indicator lamp will illuminate for 3-seconds to signal the new key is registered. If an error occurs, the indicator lamp will blink 3-times.
NOTE:
Key registration must be completed within 30-seconds after the indicator lamp stops blinking.
6. To register more keys, repeat step 5. A maximum of eight (8) keys can be registered to a vehicle.
7. After all keys are registered, start the engine with each key to make sure all keys are registered properly.
Immobilizer Key Registration Reference Table