It's from the member UW TL at other forum.start up procedure:
1. turn the ignition switch ON (II), then press and hold the keys in this order: 1) MENU key, 2) MAP/GUIDE key, 3) CANCEL key, and keep them pressed simultaneously
2. After the display changes to the diagnosis menu screen, touch the item you want to check.
3. Touch tire-calibrate
The AUTO TUNING is factory set to ON
The TIRE-CAL TUNING is used when you want to change your setup