INSPECTION PROCEDURE 2: The Secret Code cannot be Registered.: Notes
WARNING: This page is about a different car, the 2003 Mitsubishi Montero Sport. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If the transmitter battery has been changed (Refer to
ON-VEHICLE SERVICE
.) but the secret code cannot be registered, the keyless entry receiver-ECU may be faulty. Check the following circuits, replace the keyless entry receiver-ECU if necessary.