Tire Inflation Indicator Function

This function operates only when the A/T shift selector position is in P-range with the ignition switch ON or with the engine started.
NOTE:
The tire inflation indicator function is recommended to use with the engine stopped.
This function informs the driver of the satisfaction of the recommended COLD tire pressure.

Courtesy of NISSAN NORTH AMERICA, INC.

The hazard warning lamp blinks when reaching the recommended COLD tire pressure during radio wave reception. After reaching the recommended COLD tire pressure, the horn sounds once and the hazard warning lamp stops blinking.
When tire pressure becomes a value equal to or more than 30 kPa (0.31 kg/cm² , 4 psi) more than the recommended COLD tire pressure, the hazard warning lamp and the horn operates three times. After deflating the tire and reaching the recommended COLD tire pressure, the horn sounds only once and the hazard warning lamp stops blinking.

NOTE:

After starting to inflate the tire, it takes a few seconds for the tire inflation indicator to function.
If there is no response for approximately 15 seconds or more after inflating the tires, cancel the use of the tire inflation indicator function or move the vehicle approximately 1 m (3.2 ft) backward or forward to try again. The air filler pressure may be weak or out of service area.