Method A

WARNING: This page is about a different car, the 2004 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

Attach timing light to loop wire as shown in Fig 1.

Fig 1: Attaching Timing Light
Courtesy of NISSAN MOTOR CO., U.S.A.
Check ignition timing.

Fig 2: Locating Timing Indicator
Courtesy of NISSAN MOTOR CO., U.S.A.