A method for determining whether a tire is in rotation is provided. A
measured acceleration is compared to a first threshold after a first
timer indicates that a first period has lapsed, and indication that the
tire is in rotation is provided if at least one of the measured
accelerations is greater than the first threshold. If an absolute
difference between consecutive measured accelerations is greater than a
second threshold, an indication that the tire is in rotation is also
provided. Additionally, the second timer is started if the absolute
difference is greater than the second threshold and if a second timer is
not running, and indication that the tire is rotating is provided if the
absolute difference is less than a predetermined threshold and if the
second timer is running.