2nd Starter Wire in Nissans Does What?

I've done r/s unit installs on about 6 Nissans so far .. and I'm actually now curious -- what does the SECOND STARTER wire actually energize ...

I've heard various things the second stater wire might do is 1) fuel injectors  2) cold sensor  3) starter solenoid  4) coil packs...

I've done an extensive search on the forum already -- so if I missed it, sorry if re-post.

Thanks!

Hmmm..that is an interesting question..I am sure someone out there knows. All I know is that it needs to be energized to remote start the vehicle.

If I had to make an educated guess I would think the 2nd start wire goes a control module..perhaps an ecm or bcm..the ignition wires are used for fuel injectors/coil packs etc...as far as cold sensor I guess it is possible but the wire would still be activated weather cold or hot so I don't really see the sense in the factory using a seperate start wire for this..although I really don't see any sense in about 95% of the things the factory does these days, especially with the electrical systems.

Ok... but what does the cold start sensor in turn do???  Does it... increase the current going to the car starter itself (because the engine oil and tranny fluid is like jelly)??

But even if the vehicle is warm..that wire still sends voltage when the key is in the crank position. Does this sensor draw that much current where it really needs its own wire?[sacastic] Or is this just another example of "overengineering" just for the sake of overengineering? Afterall I have owned many vehicles that started fine in the cold with only one crank wire. But like I stated earlier....it just makes no sense but something we simply work around. As long as I can get the vehicle to remote start I am fine with it.

As far as the new Chryslers yes...but not only is it a second starter...but that SAME wire is also an accessory, you gotta love it.