It is the item needed to complete step #8 below:
Enter training mode:
1. Make sure all doors are open.
2. Make sure key is OFF.
3. Press and release brake pedal.
4. Cycle key from OFF to RUN 3 times, ending in RUN.
5. Press and release brake pedal.
6. Turn key to OFF.
7. Cycle key from OFF to Run 3 times, ending in Run. (The horn will blow indicating system is in training mode)
8. Follow the display on the instrument panel indicating what order to set each wheel by placing the TMPS19 as close to the wheel sensor as possible and pressing the button until the horn blow indicating that wheel is set.
9. After you set the last wheel the instrument panel display will say training complete.