Power Supply And Ground

WARNING: This page is about a different car, the 2007 Nissan Quest. 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. 19, located in the fuse block (J/B)]
to key switch terminal 1, and
through 15A fuse [No. 3, located in the fuse block (J/B)]
to BCM terminal 57, and
through 50A fusible link (letter j , 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 2
to BCM terminal 37.

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

through 10A fuse [No. 16, 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 1
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 1
through case ground of front door switch RH.

When the sliding door LH is opened, ground is supplied

to BCM terminal 48
through sliding door switch LH terminal 1
through case ground of sliding door switch LH.

When the sliding door RH is opened, ground is supplied

to BCM terminal 13
through sliding door switch RH terminal 1
through case ground of sliding door switch RH.

When the liftgate is opened, ground is supplied

to BCM terminal 43
through back door switch terminal 1 (without power back door) or back door latch (door ajar switch) terminal 7 (with power back door)
through back door switch terminal 3 (without power back door) or back door latch (door ajar switch) terminal 8 (with power back door)
through grounds D403 and D404.

When doors are locked or unlocked by either door lock/unlock switch, BCM receives a ground signal

to BCM terminal 22
through main power window and door lock/unlock switch terminal 14 (with rear power vent windows) or terminal 12 (without rear power vent windows)
through main power window and door lock/unlock switch terminal 17 (with rear power vent windows) or terminal 15 (without rear power vent windows), or
through power window and door lock/unlock switch RH terminal 16
through power window and door lock/unlock switch RH terminal 11
through grounds M57, M61 and M79.

When the front door LH is unlocked by the key, the BCM receives a ground signal

to BCM terminal 22
through main power window and door lock/unlock switch terminal 14 (with rear power vent windows) or terminal 12 (without rear power vent windows)
through main power window and door lock/unlock switch terminal 6 (with rear power vent windows) or terminal 7 (without rear power vent windows)
through front door lock assembly LH (key cylinder switch) terminal 6
through front door lock assembly LH (key cylinder switch) terminal 5
through grounds M57, M61 and M79.

When the front door LH is locked by the key, the BCM receives a ground signal

to BCM terminal 22
through main power window and door lock/unlock switch terminal 14 (with rear power vent windows) or terminal 12 (without rear power vent windows)
through main power window and door lock/unlock switch terminal 4 (with rear power vent windows) or terminal 6 (without rear power vent windows)
through front door lock assembly LH (key cylinder switch) terminal 1
through front door lock assembly LH (key cylinder switch) terminal 5
through grounds M57, M61 and M79.

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

through BCM terminal 63
to lamps on demand switch terminal 3
through lamps on demand switch terminal 4 (with switch in DOOR position)
to room/map lamps terminal 2
to personal lamps 2nd and 3rd row terminal 2 (without rear roof console) or personal lamps 2nd and 3rd row terminal 3 (with rear roof console).

With power and ground supplied, the lamps illuminate.