With Intelligent Key System

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

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

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

Power is supplied

through 15A fuse [No. 33, located in fuse and fuse block (J/B)]
to key switch and ignition knob switch terminals 1 and 3.

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

And not turned ignition knob switch, power will not be supplied to Intelligent Key unit.

Ground is supplied

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

At the time that driver door are opened, BCM detects that driver door is unlocked. It determines that map lamp timer operation conditions is met, and turns map lamp ON for 30 seconds.

Key is in ignition key cylinder (key switch ON), or turned ignition knob switch, Power is supplied

through key switch and ignition knob switch terminal 4
to BCM terminal 37,
through key switch and ignition knob switch terminal 2
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. And turned ignition knob switch, power supply to Intelligent Key unit is terminated. BCM detects that key has been removed, determines that map lamp timer conditions is met, and turns map lamp ON for 30 seconds. When driver door opens --> closes, and key is not inserted in key switch (or not turned ignition knob switch), BCM terminal 62 changes between 0V (door open) --> 12V (door closed). BCM determines that conditions for map lamp operation is met, and turns map lamp ON for 30 seconds.

Timer control is canceled under the following conditions.

Driver door is locked [when locked keyfob, power window main switch (door lock and unlock switch) or door key cylinder switch].
Driver door is opened (driver door switch terns ON).
Ignition switch ON.