Power Supply And Ground

WARNING: This page is about a different car, the 2004 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

Power Is Supplied At All Times

through 15A fuse [No. 52, located in fuse, fusible link and relay block (J/B)]
to AV control unit terminals 2 and 3, and
to display terminals 21 and 23.

When Ignition Switch is in ACC or ON Position, Power is Supplied

through 10A fuse [No. 21, located in fuse block (J/B) NO. 1]
to AV control unit terminal 6
to display terminal 19, and
to multifunction switch terminal 1.

When Ignition Switch is in ON or START Position, Power is Supplied

through 10A fuse [No. 1, located in fuse block (J/B) NO. 1]
to AV control unit terminal 27.

Ground is Supplied

to AV control unit terminals 1 and 4
through body grounds M25 and M115, and
to multifunction switch terminal 2 and
to display terminals 22 and 24
through grounds M24 and M114.