With Intelligent Key System

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

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

In addition, when interior room lamp turns ON or OFF there is gradual brightening or dimming over 1 second.

Power is supplied

through 10A fuse [No. 9, located in fuse block (J/B)]
to key switch and ignition knob switch terminals 2 and 4.

When key is removed from ignition key cylinder (key switch OFF), power will not be supplied to BCM terminal 37.

When the ignition knob switch is released, power will not be supplied to Intelligent Key unit terminal 27.

When front door key cylinder switch LH is unlocked, ground is supplied

to BCM terminal 7
through front door key cylinder switch LH terminal 5
through front door key cylinder switch LH terminal 4
through grounds M57 and M61.

At the time the front door LH is opened, the BCM detects the front door LH is unlocked. It determines that the interior room lamp timer operation conditions are met, and interior room lamp ON for 30 seconds.

When the key is in ignition key cylinder (key switch ON), or ignition knob switch is pushed, power is supplied

through key switch and ignition knob switch terminal 1
to BCM terminal 37, or
through key switch and ignition knob switch terminal 3
to Intelligent Key unit terminal 27.

When the key is removed from key switch (key switch OFF), power supply to BCM terminal 37 is terminated. When the ignition knob switch is released, power supply to intelligent key unit is terminated. The BCM detects that the key has been removed, determines that interior room lamp timer conditions are met, and turns room lamp ON for 30 seconds.

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

Interior room lamp timer control is canceled under the following conditions:

Front door LH is locked (with keyfob or front door key cylinder switch LH).
Front door LH is opened (front door switch LH).
Ignition switch ON.