Car Alarms: 97 Nissan Maxima, valet mode, key fob programming

Question
I do not know if this is related to the car alarm topic or not, but I own a 97 Maxima and my car alarm will randomly go off.  According to the manual, after a couple of minutes, it is supposed to shut off automatically, but it does not, and I will have to do it by unlocking the car.  The alarm is the manufactured alarm.  I think that this may have something to do with my door?  My door open warning light keeps coming on, even when all my doors are shut.  This does not allow me to lock the door with my remote.  When the doors are closed and locked, the side step light on the front doors are on, and after a while, will turn off.  I just have been disregarding it, thinking it will go away.  Please help if you have anything on this.

Answer
The problem here is that the "factory" alarm is also
part of the door lock system. That means there are 2 ways
this is designed to disarm.

1. using the factory key fob transmitter
to unlock/disarm.

2. using the key in the drivers door, turn left all the
way, then right to unlock/disarm.

If the latter suggestion does not work, then the next thing is
to tow it to the nearest dealership for new key fob
programming.

If it was after market, then there is an overide
switch that can be used.

(ie; look under the dash area for a button or,
a toggle switch. When you locate it, turn on the
ignition key, press and hold in the button (little
spring loaded micro button, red or black possibly)
until the alarm chirps 1 time. This should over ride
the system, and only the keyless entry part,
if installed, would still be operating.
The LED (light emiting diode) light in the dash
should also go on solid.=VALET/OVERIDE.

This stops the alarm except for the keyless
entry if installed. The next step is to
either remove the alarm or, try to identify,
and or, get new remotes for it.

But once in Valet mode, it will allow the car
to start and operate like there was no alarm at all.)

So, that's the options available at this point.

I hope you can work it out to your benefit, and
it turns out to possibly be an after market system.

Good luck.

ALARMTEK
CARALARMMAN.COM