Additional Keys
- If the ECM recognizes a key from a previous key teaching process, the authentication will be accepted and the EEPROM data updated. The transponder content will not be changed.
- Attempts to re-teach the ECM will reject a key, which has already been sent through the same teaching cycle. A notification message is then sent to the tester.
- The ECM can also recognize and reject invalid keys when they are presented for teaching. Keys can be invalid due to faults in the transponder or other unsuccessfully programmed data. If the ECM detects different ECM and transponder authenticators, the key will be rejected.
- The maximum number of keys that can be taught is 4.