WARNING: This page is about a different car, the 2006 Nissan Titan. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Base Radio Circuit
Fig 2: DVD Player Circuit
Fig 3: Mid-Line Radio Circuit (1 of 2)
Fig 4: Mid-Line Radio Circuit (2 of 2)
Fig 5: Premium Radio Circuit, W/ Navigation (1 of 3)
Fig 6: Premium Radio Circuit, W/ Navigation (2 of 3)
Fig 7: Premium Radio Circuit, W/ Navigation (3 of 3)
Fig 8: Premium Radio Circuit, W/O Navigation (1 of 2)
Fig 9: Premium Radio Circuit, W/O Navigation (2 of 2)