Learn Mode Cancellation
WARNING: This page is about a different car, the 2005 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
The TPM system will cancel the learn mode if more then 2 minutes have passed and no sensors have been learned, or if the system has been in learn mode for more than 5 minutes. If the learn mode is canceled before any sensor ID is learned, the antenna module will remember all previous sensor IDs and locations.