Room Lamp Timer Operation

WARNING: This page is about a different car, the 2006 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

When lamp switch is in DOOR position, and when all conditions below are met, BCM performs timer control (maximum 30 seconds) for interior room lamp and map lamp ON/OFF. Power is supplied

through 10A fuse (No. 25, located in the fuse and fusible link box)]
to key switch terminal 2.
Key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37. Ground is supplied
to BCM terminal 46
through main power window and door lock/unlock switch terminal 11.
At the time that front door LH is opened, BCM detects that front door LH is unlocked. It determines that interior room lamp and map lamp timer operation conditions are met, and turns the interior room lamps ON for 30 seconds.

Key is in ignition key cylinder (key switch ON), power is supplied
through key switch terminal 1
to BCM terminal 37.
When key is removed from key switch (key switch OFF), power supply to BCM terminal 37 is terminated. BCM detects that key has been removed, determines that interior room lamp and map lamp timer conditions are met, and turns the interior room lamps ON for 30 seconds.

When front door LH opens --> closes, and the key is not inserted in the key switch (key switch OFF), BCM terminal 47 changes between 0V (door open) --> 12V (door closed). The BCM determines that conditions for interior room lamp operation are met and turns the interior room lamp ON for 30 seconds.

Timer control is canceled under the following conditions.
Front door LH is locked [when locked by keyfob, main power window and door lock/unlock switch, or front door lock assembly LH (key cylinder switch)]
Front door LH is opened (front door switch LH turns ON)
Ignition switch ON.