WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Forced Entry Circuit (1 of 2)
Fig 2: Forced Entry Circuit (2 of 2)
Fig 3: Immobilizer Circuit (NATS), W/ Intelligent Key Unit
Fig 4: Immobilizer Circuit (NATS), W/O Intelligent Key Unit