Method A

WARNING: This page is about a different car, the 2005 Nissan Pathfinder. 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 To Loop Wire
Courtesy of NISSAN MOTOR CO., U.S.A.
Check ignition timing.

Fig 2: Checking Ignition Timing
Courtesy of NISSAN MOTOR CO., U.S.A.