WARNING: This page is about a different car, the 2004 Infiniti I35. However, it is still accessible from the selected car via links, so may be relevant.
Check resistance between terminals 1 (R/Y), 2 (PU) and 3 (B).
Fig 1: Checking resistance between terminals 1 (R/Y), 2 (PU) and 3 (B) (1 of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.
Fig 2: Check resistance between terminals 1 (R/Y), 2 (PU) and 3 (B) (2 of 2)