2002 has a chain. But one way to determine if a car has one is go to a few parts sites, like Rock Auto, and look up a timing belt for a 2002 Pathy. They won't have one. But they will have a chain. For other brands some engines may have a timing belt, others may not, so take care to specify the correct engine.
Chain
Timing chain
Timing chain
Timing belt
The 4.0 litre V6 engine in a 2006 Nissan Pathfinder has a timing CHAIN
The 2001 Nissan Pathfinder has a 3.5 liter engine with a timing chain rather than a belt. http://www.samarins.com/reviews/pathfinder.html
A 2002 Nissan Maxima does not having a timing belt. It has a timing chain.
it has sparkles on the belt
chain
It has a chain.
A 2006 Nissan Pathfinder has a timing chain. For more details on location and repair, check your owners manual.
It has a timing belt which must be changed every 106,000 miles.