What causes idle to go up and down on a nissan sentra 2006

The fuses and relays cover all the windows, so the likely culprit is the door switch module.

https://www.google.com/search?q=2002+nissan+sentra+window+switch

Nissan Sentra (B15; 2000-2006) fuses and relays

https://fuse-box.info > nissan > nissan-sentra-b15-2000-...

Here you will find fuse box diagrams of Nissan Sentra 2000, 2001, 2002, 2003, 2004, 2005 and 2006, get information about the location of the fuse panels ...

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https://www.modifiedlife.com/2006-nissan-sentra-car-stereo-wiring-guide/

2006 nissan sentra
Try the wiring
Wiring, schematic, electrical diagrams etc are basic contents of these online books they sell here on this website link I have attached. Must check it out

your engine would be running rough like a fouled spark plug, a super hot exaust system is caused by a vacuum leak witch will also make the engine run rough at idle, a easy way to locate the vacuum leak is the spray parts of the intake system with WD40, intake manifold, vacuum hoses,

Check IAC and clean.

Vacuum leak

idling controller sir . The idle air control motor is just beneath the throttle housing and is controlled by the fuel injection computer. Things that can cause a rough idle and stalling can be vacuum leaks

On this website you find fuse box diagram and description for Nissan Sentra (2006)
https://www.carknowledge.info/nissan-sentra-2000-2006-fuse-box-diagram/

https://www.autogenius.info/nissan-sentra-2000-2006-fuse-box-diagram/

ignition module.

will the crank sensor cause the vehicle to shut down while running?