Power Supply And Ground

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.

Power is supplied at all times

through 10A fuse [No. 19, located in the fuse block (J/B)]
to key switch terminal 3, and
through 15A fuse [No. 22, located in the fuse block (J/B)]
to BCM terminal 57, and
through 50A fusible link (letter f , located in the fuse and fusible link box)
to BCM terminal 70, and
through 10A fuse [No. 21, located in the fuse block (J/B)]
to cargo lamp relay terminals 2 and 5.

When the key is inserted in key switch (with column shift) or key switch and key lock solenoid (with floor shift), power is supplied

through the key switch (with column shift) or key switch and key lock solenoid (with floor shift) terminal 4
to BCM terminal 37.

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

through 10A fuse (No. 59, located in the fuse and relay box)
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 (crew cab) or
through front door switch LH terminal 3 (king cab)
through grounds B7 and B19.

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 (crew cab) or
through front door switch RH terminal 3 (king cab)
through grounds B117 and B132 (king cab).

When the rear door LH (crew cab) 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 LH (king cab) is opened, ground is supplied

to BCM terminal 47
through rear door switch upper LH and rear door switch lower LH terminal 1
through rear door switch upper LH and rear door switch lower LH terminal 2
through grounds B7 and B19.

When the rear door RH (crew cab) 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 rear door RH (king cab) is opened, ground is supplied

to BCM terminal 12
through rear door switch upper RH and rear door switch lower RH terminal 1
through rear door switch upper RH and rear door switch lower RH terminal 2
through grounds B117 and B132.

When the front door LH or RH is unlocked by the door lock and unlock switch, BCM receives serial data

to BCM terminal 22
through main power window and door lock/unlock switch terminal 14 (crew cab) or 12 (king cab) and power window and door lock/unlock switch RH terminal 16
through main power window and door lock/unlock switch terminal 17 (crew cab) or 15 (king cab)
through grounds M57, M61 and M79.

When the front door LH is unlocked by the key, the BCM receives serial data

to BCM terminal 22
through main power window and door lock/unlock switch terminal 14 (crew cab) or 12 (king cab)
through main power window and door lock/unlock switch terminal 6 (crew cab) or 7 (king cab)
through front door lock assembly LH (key cylinder switch) terminal 6
to 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 the BCM, ground is supplied

to door mirror LH and RH terminal 13 (with puddle lamps)
to front room/map lamp assembly terminal 1 (with front roof console) and
to personal lamps 2nd row terminal 1 (with rear roof console)
through front room/map lamp assembly terminal 2 (with front roof console)
through BCM terminal 63.

With power and ground supplied, the lamps illuminate.

When the BCM receives cargo lamp switch input, ground is supplied to cargo lamp relay terminal 1, which energizes the cargo lamp relay. When this relay is energized, power is supplied

through cargo lamp relay terminal 3
to high-mount stop lamp (cargo lamp) terminal 3, and
to rear combination lamp (tailgate cargo lamp) LH and RH terminal 3 (with tailgate cargo lamps).

Ground is supplied

to high-mount stop lamp (cargo lamp) terminal 2
through grounds B117 and B132, and
to rear combination lamp LH and RH (tailgate cargo lamp) terminal 1 (with tailgate cargo lamps)
through grounds E9, E15 and E24.

With power and ground supplied, the lamps illuminate.