Jeep 2004 Grand Cherokee Owner's Manual page 100

100 UNDERSTANDING THE FEATURES OF YOUR VEHICLE
NOTE: There is a 60 second timer for training the first
tire and a 30 second timer between training the remain-
ing tires. If either of these timers expire, the EVIC will
abort the training procedure.
6. Starting at the left front tire, place the training magnet
over the valve stem until the horn chirps (This takes
approximately 5 seconds).
7. Repeat step 6 working clockwise around the vehicle
(Left Front, Right Front, Right Rear, Left Rear, Spare) until
all five TPM sensor positions are trained.
NOTE: The spare tire is only trained with the 5 Tire
TPM System.