In the computer. If check engine light is on you can get them by plugging a reader into port under dash,.
There is no carburetor located on a 1994 Nissan Altima because it uses fuel injection. A carburetor is typically located on top of the engine on the intake manifold.
I have a 1995 Nissan pathfinder and the alarm computer was under the driver seat. I just took out the seat and unplugged the alarm computer. Not sure if it's the same on a 1994 Nissan pathfinder.
The computer is located behind the stereo console on the floor mounted to the hump. It is silver and has a red light when key is turned on viewable from the drivers side.
on the side of the engine
May be computer controlled and not adjustable
It's by the flywheel housing.
Inside fuel tank.
passenger side of intake manifold
Under the hood.
up your tail pipe
Top, backside of the intake plenum.