System Description: Notes

WARNING: This page is about a different car, the 2008 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times

to BCM terminal 70
through 50A fusible link (letter f, located in the fuse and fusible link box)
to BCM terminal 57
through 10A fuse [No. 21, located in the fuse block (J/B)]
to passenger select unlock relay terminal 2
through 10A fuse [No. 3, located in the fuse block (J/B)] and
to key switch and ignition knob switch terminals 1 and 3
through 10A fuse [No. 2, located in the fuse block (J/B)].

With ignition knob pushed, power is supplied

through key switch and ignition knob switch (ignition knob switch) terminal 2
to Intelligent Key unit terminal 27.

With ignition key inserted, power is supplied

through key switch and ignition knob switch (key switch) terminal 4
to BCM terminal 37 and
to Intelligent Key unit terminal 7.

Ground is supplied to terminal 67 of BCM through body grounds M57, M61 and M79.

When the door is locked or unlocked with main power window and door lock/unlock switch, ground is supplied

to CPU of main power window and door lock/unlock switch
through main power window and door lock/unlock switch terminal 17
through body grounds M57, M61 and M79.

Then main power window and door lock/unlock switch operation signal is supplied

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

When the door is locked or unlocked with power window and door lock/unlock switch RH, ground is supplied

to CPU of power window and door lock/unlock switch RH
through front power window switch RH terminal 11
through body grounds M57, M61 and M79.

Then power window and door/lock/unlock switch RH operation signal is supplied

to BCM terminal 22
through power window and door lock/unlock switch RH terminal 16.

When the door is locked with front door lock assembly LH (key cylinder switch), ground is supplied

to main power window and door lock/unlock switch terminal 4
through front door lock assembly LH (key cylinder switch) terminals 1 and 5
through body grounds M57, M61 and M79.

Then front door lock assembly LH (key cylinder switch) operation signal is supplied

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

When the door is unlocked with front door lock assembly LH (key cylinder switch), ground is supplied

to main power window and door lock/unlock switch terminal 6
through front door lock assembly LH (key cylinder switch) terminals 6 and 5
through body grounds M57, M61 and M79.

Then front door lock assembly LH (key cylinder switch) operation signal is supplied

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

BCM is connected to main power window and door lock/unlock switch and front power window switch RH through a serial link.

When the front door switch LH is ON (door is open), ground is supplied

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

When the front door switch RH is ON (door is open), ground is supplied

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

When the rear door switch LH is ON (door is open), ground is supplied

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

When the rear door switch RH is ON (door is open), ground is supplied

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