1. Check Key Fob Battery

WARNING: This page is about a different car, the 2004 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.

Remove battery and measure voltage across battery positive and negative terminals, (+) and (-).

Voltage: 2.5V - 3.0V

NOTE: Key fob does not function if battery is not set correctly.

OK or NG

OK >> GO TO 2.
NG >> Replace battery.

Fig 1: Measuring Key Fob Battery Voltage

Courtesy of NISSAN MOTOR CO., U.S.A.