Registration With Scan Tool MB991502

Registration with scan tool MB991502

CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to "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 halfway 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 the "ON" position







3. At "System Select," press "YES.







4. Select "Immobilizer," press "YES".







5. Select "Special Func," press "YES".










6. Select "key ID registr," press "YES".
If DTC 11 exists, "Can't execute" will be displayed. Check for DTC 11







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.

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

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.







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.

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

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

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.