Standard Procedure - Erasing Transmitter Codes
WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
To erase all universal transmitter codes, simply hold down buttons 1 and 3 until the two green dots below the house symbol begin to flash and "CHANNELS CLEARED" is displayed.
NOTE:
Individual channels cannot be erased. Erasing the transmitter codes will erase ALL programmed codes.