WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.
Check continuity between terminals by supplying 12 volts and ground to coil side terminals of relay.
Fig 1: Checking Continuity Between Terminals By Supplying 12 Volts And Ground To Coil Side Terminals Of Relay