kinda hard to explain, but here goes...

i was looking at my engine and saw something that was not connected....
if you look at your battery....just below it there was this two pronged thing with two connecters with it....
I noticed that these two connecters were not attached...
so i attached them....
the prong kinda looks like it would go to the radiator or something in that general area...
does anybody know what this does....my car was running with it unplugged so it cant be too crucial, but i wanna know what it is and what it does..
i know the explanation is kinda shitty, but i may be able to answer some questions or give a better description...

thanks for any info...
=-dustin

 

COuld be the water thermo switch on the radiator. Helps control the AWS. Not a problem to run without it.

Jarett

 

Just listen to J-RAT and you won't go wrong. Yes, its a water temp switch that's used during the warmup phase of the engine.. So connect the two bullets to the switch for sure. Costs you nadda. Only applies to series four cars.

EDIT: What it does is make a circuit to the ECU when the water temp in the radiator reaches a certain temp. Its a closed circuit when the water is warmed up, open circuit when the water is cold. When the switch makes, it puts a ground on the ECU.

 

AWS????

 

Accelerated Warmup System...Also known as the Accelerated Wear-out System.

Jarrett

 

Let me tell you something that you should know if you hvae a series four and have to pass emissions.

That water temp switch is VERY important if you have a N/A. If that switch is disfunctional, and does not make a circuit when the water is heated up, the relief solenoid will open wide up once you get under way i.e. the tester puts the car on a roller and accelerates to 15/20 mph. That is not a good thing to happen. In my mind that is the same thing as throwing the air pump away because most of the air will be dumped overboard, not going to the Exaust ports and the split air pipe.

I have two LEDs connected to the Relief and Switching solenoids, in the car, and have observed the results with the water switch in the circuit and with one lead off the water temp switch. It works as described above.

The Relief solenoid is energized at idle, but as soon as the car putters down the street, it gets de-energized (water temp sw disconnected). Ain't good at all. Fix it.

EDIT: Normally the relief solenoid will stay energized until approx 3500rpm, where upon it will de-energize. Thats with a operational system. There are exceptions to that rule though. Not worth mentioning.

 

Make sure it's not the diagnostic jumper connector you're playing with, it's in that area too...

 

OH FUDGE! REALLY! I ****** GIVE UP,.

 

well...
mine is a series 4 but its a turbo, and i have no emmissions to speak of so.....but im sure this will be valuable to those N/A owners....which is why im sure you posted that......
hailers....you rock