Power Supply And Ground

WARNING: This page is about a different car, the 2007 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times

through 10A fuse (No. 25, located in the fuse and fusible link box)
to key switch terminal 2,
through 10A fuse [No. 18, located in the fuse block (J/B)]
to BCM terminal 57, and
through 50A fusible link (letter g , located in the fuse and fusible link box)
to BCM terminal 70.

When the key is inserted in key switch, power is supplied

through the key switch terminal 1
to BCM terminal 37.

With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No. 1, located in the fuse block (J/B)]
to BCM terminal 38.

Ground is supplied

to BCM terminal 67
through grounds M57, M61 and M79.

When the front door LH is opened, ground is supplied

to BCM terminal 47
through front door switch LH terminal 2
through case ground of front door switch LH.

When the front door RH is opened, ground is supplied

to BCM terminal 12
through front door switch RH terminal 2
through case ground of front door switch RH.

When the rear door LH is opened, ground is supplied

to BCM terminal 48
through rear door switch LH terminal 2
through case ground of rear door switch LH.

When the rear door RH is opened, ground is supplied

to BCM terminal 13
through rear door switch RH terminal 2
through case ground of rear door switch RH.

When the glass hatch is opened, ground is supplied

to BCM terminal 42
through glass hatch ajar switch terminal 1
through case ground of glass hatch ajar switch.

When the liftgate is opened, ground is supplied

to BCM terminal 43
through back door switch terminal 3
through back door switch terminal 1
through grounds D406 and D504.

When the front door LH is unlocked by the key, the main power window and door lock/unlock switch receives ground signal

to main power window and door lock/unlock switch terminal 6
through front door lock assembly LH (key cylinder switch) terminal 3
through front door lock assembly LH (key cylinder switch) terminal 4
through grounds M57, M61 and M79.

The BCM receives the unlock signal as serial data

to BCM terminal 22
through main power window and door lock/unlock switch terminal 14.

When a signal, or combination of signals is received by BCM, ground is supplied

to front room/map lamp assembly terminal 2
to personal lamp 2nd row terminal 2 (with rear map lamps)
to room lamp 2nd row terminal 1
through BCM terminal 63, and
to cargo lamp terminal 1
through BCM terminal 49.

With power and ground supplied, the lamps illuminate.