Immobilizer Encrypted Code Registration
HOW TO REGISTER ENCRYPTED CODERequired Special Tool:
- MB991502: Scan Tool (MUT-II)
CAUTION: Because registering the encrypted codes is done after all previously-registered codes have been erased, you should keep all of the ignition keys that have already been registered accessible.
If the ignition key, the immobilizer-ECU, the ECM
If an attempt is made to start the engine with an unregistered ignition key, cranking occurs, but fuel supply is cut off to disable the engine. In approx. 10 seconds, the theft-alarm indicator will blink for approx. 30 seconds.
NOTE: ECM
POINTS TO NOTE DURING OPERATION
If none of the functions can be used, check the diagnostic trouble codes, and after carrying out any necessary repairs, repeat the operation.
If an incorrect password 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 canceled.
KEY ID REGISTRATION
All ignition keys can be registered with scan tool MB991502.
Additional ignition keys can be registered with or without scan
tool MB991502.
Registration with scan tool MB991502
CAUTION: To prevent damage to scan tool MB991502, always turn the Ignition switch to the LOCK (OFF) position before connecting or disconnecting scan tool MB991502.
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 MB991502 hallway through 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.
1. Connect scan tool MB991502 to data link connector (16-pin).
2. Turn the ignition switch to ON position.
3. At System Select, press YES.
4. Select Immobilizer press YES.
5. Select Special Function, press YES.
If DTC 11 exists, Can't execute will be displayed. Check for DTC 11.
6. Select key ID register, press YES.
7. Input the password. Use the UP and DOWN keys to change the current password digit to a value between 0 and 9. Use the LEFT and RIGHT keys to move to a different password digit. Press the YES key to accept the password. If an incorrect password is input five times in a row, the immobilizer-ECU switches to unauthorized operation, start- prevention mode.
NOTE: Four separate digits must be input to make up the password.
8. Press the YES key to start key ID registration.
9. 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.
10. 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. Key ID registration screen will be displayed, then register another key.
If key ID registration is complete, press the NO key.
NOTE: A maximum of eight different keys can be registered.
11. This completes the registration operation. Turn the ignition switch LOCK (OFF) and leave it off for approximately ten seconds.
12. Check that the engine can be started with each of the ignition keys.
13. Check that the immobilizer system DTC and MFI system DTC did not set.
14. Turn the ignition switch to the LOCK (OFF) position.
15. Disconnect scan tool MB991502.
Registration of additional keys with the scan tool
Additional key(s) can be registered with the scan tool while keeping all existing key data.
CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the LOCK (OFF) position before connecting or disconnecting scan tool MB991502.
NOTE: To register additional keys with the scan tool, no registered keys must be lost.
1. Connect scan tool MB991502 to the 16-pin data link connector.
2. Turn the ignition switch to the ON position.
3. At System Select, press YES.
4. Select immobilizer, press YES.
5. Select Special Function, press YES.
If DTC 11 exists, Can't execute will be displayed. Check for DTC 11.
6. Select Add key ID reg, press YES.
7. Press the YES key to start key ID registration.
8. This will be displayed when the add 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.
9. 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. Key ID registration screen will be displayed, then register another key.
If key ID registration is complete, press the NO key.
NOTE: A maximum of eight different keys can be registered.
10. This completes the registration operation. Turn the ignition switch LOCK (OFF) and leave it off for approximately ten seconds.
11. Check that the engine can be started with each of the ignition keys.
12. Check that the immobilizer system DTC and MFI system DTC did not set.
13. Turn the ignition switch to the LOCK (OFF) position.
14. Disconnect scan tool MB991502.
Registration of additional key(s) without using the scan tool
If the scan tool is not available, new key(s) can be registered by operating two keys which have been registered to the vehicle (A maximum of eight keys can be registered to one vehicle). Follow the procedure below to register new key(s) to the vehicle.
NOTE: The registered key is the key that allows you to start the engine.
1. Turn on the ignition switch by using the first registered key (key A), and wait for five seconds.
2. Within 30 seconds, remove the key.
3. Within seven seconds after the ignition switch has been turned to the LOCK (OFF), insert the second registered key (key B) and turn on the ignition switch again. Now the theft-alarm indicator light should blink twice for one second. If it does not blink, you has failed to register. Repeat from step 1.
4. Turn on the key B. Within 30 seconds, remove the key.
5. Within seven seconds after the ignition switch has been turned to the LOCK (OFF) position, turn on the ignition switch by using a new key.
6. The immobilizer-ECU identifies the new key to accept or reject it, and operates the theft-alarm indicator.
7. A maximum of eight ignition keys can be registered to one vehicle (If you attempt to register the ninth key, the immobilizer-ECU rejects the key). Follow the procedure below to register another new key.
1. Within 30 seconds after the new key has been registered on step 6, remove the key.
2. Within seven seconds after the ignition switch has been turned to the LOCK (OFF), insert another new key and turn on the ignition switch.
3. To register more other ignition key(s), repeat steps 1 and 2.
8. If any of the following conditions are satisfied, the additional key registration mode will terminate:
- The ignition switch has been on for more than 30 seconds.
- After the ignition key has been turned to the LOCK (OFF), the engine control relay is turned off.
- The scan tool has started communicating with vehicle systems.
9. After the registration mode has terminated, the additionally registered key(s) should allow you to start the engine.