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Method A

WARNING: This page is about a different car, the 2004 Infiniti FX45. 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. See Fig 2 .

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