youngson141

Posted before but didn't get much help, then i ran into some family emergencies so i couldn't take it in to get checked out.

Problem: My fan doesn't come at all (not even when i turn the car off), it use to when it was cold and i would let my car warm while I got ready. I could hear it coming on for a while then turn off..

But lately I haven't noticed it at all, and if i sit for a while as if in a packed drive-thru or just plain sitting in drive with my brakes applied (traffic or long lights). The temp will start to go up. Then it would go down once i started driving and air was flow through everything. (The time varies, sometimes it's 2 mins and sometimes it's 5 mins)

I had my radiator flushed and refilled about 2 months ago (Performed after I had to get a new radiator cap) and my fan was still operating. I've also noticed the overflow tank, is empty.. was full a week ago but yesterday it was completely empty and the engine was cool.

I'm confused here and would like to try and get this fixed myself if it's possible before taking it in and handing over an arm and leg

01tl4tl

ck all the hose clamps are tight- no obvious leaks
next verify the rubber hose is attached inside the res/overflow bottle CAP
if thats not there- has fallen into the bottle- the system wont work and causes several problems, must fit tight on its nozzle

top off radiator if needed
fill the res to COLD level

May have had the heater closed when rad work done - be sure its set to max hot with key ON, then key off and do your bleeding of air bubbles, fan will run a few times as part of that
There is a lengthy/ ~15 minute specific procedure for our cars- maybe that wasnt done right
fan is possibly fan temp sensor - located either on bottem passenger side corner of radiator- it screws in and has a wire to it
Or located at the thermostat on top of engine

May also be from low coolant level from improper burping procedure- that will fake out the fan operating sensor

Get this fixed asap - any temp over halfway is bad

easy DIY

youngson141

radiator cap was bad... seems to have fixed it so far, ill let you guys know though

01tl4tl

so you have operation of the driver side fan with temp needs- and the guage sits just below half all the time now- is that correct

did you burp the system -just to be sure
thats another cause of tricking fan into not working- air bubble behind thermostat

youngson141

Yea, I can feel/hear when it comes on now. I actually had a shop do it, but my mechanic owns the exact same car so I'm pretty sure he did burp the system. If I notice anything though, ill burp the system myself..

youngson141

What i thought was the fan coming on, wasn't. It probably was coming on that day, but today while driving the temp started to rise again. And I didn't notice the fan come on and even after getting home the fan didn't come on after the car was off. (I didn't let the temp. go another notch above half way after i noticed it start rising)

I can test my fans by connecting them to a 12v power source? how straight forward is that?

I don't have owners manual, so what are the specific steps to burping the system?

And In these pictures i took, is that the ECT sensor?


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piggylover1985

This is how i would do to check for the fan operation. I would connect an inline fuse like 5 amp to the power wire ,just in case if you probe into the ground wire, it will just pop the fuse and won't take out any thing else. Locate the fan connector, the hot wire should be in brighter color, probe into it the fan should come on.

youngson141

ok, i'll give that a try!!

01tl4tl

do a search of azine gen2 for burping- I know we have copied the instructions to a thread or ten

fsttyms1

Make sure all your fluids are topped off. Then there is a fan switch (cant remember off the top of my head where its located, but i think its on the front of the motor right side? )

friesm2000

iTrader: (4)

that works, but there is an easier way also......

turn on the A/C , fans should come on


then work from there

friesm2000

iTrader: (4)

iirc, it should be in the thermostat housing/bridge (between the two heads) right above the tranny, and basically under the TB


or it might be on the bottom tank of the radiator also, but i think they have gotten away from that though


too many cars to remember

friesm2000

iTrader: (4)

x2, had that today, but the issue was that the fans went into a self-protect mode though, and just stayed on at like med. speed, and never turned of

but withen like us opening the bleed screw on the radiator, and putting more coolant in it, it cleared up lol

youngson141

how long would it take the a/c controlled fan to come on? just getting off work, and when i got home I parked, popped the hood and turned the a/c and waited.... Like 5 minutes went by and nothing happened, My temp started going up so i shut the car off.

One thing i noticed is that (hope you guys understand this). You know when you run a/c or a fan comes on, your car's engine reacts to it (or something reacts to it) to provide the first initial power to start the fan. I noticed that happen but no fan still...

friesm2000

iTrader: (4)

you mean the increased idle to compensate for the increased load by the fans???

but yeah the fans should be coming on basically immediately (maybe 5 seconds at MAX) when the a/c turns on

so i think you got an issue with the output side from the fan module/ecu, and being able to actually turn on the fans (the ecu is seeing the command for the fans though, by bumping the idle)

friesm2000

iTrader: (4)

also before we go any further what year is your car again (i know every year can have a little different wiring then the other's, so just want to verify first)

youngson141

somebody understood what i was saying.. hahah!! but its a 2000. the a/c did blow cold for 2 of the 5 mins but i guess without that fan going it went warm

friesm2000

iTrader: (4)

yeah was not totally sure if that is what you meant, lol

even better that you did say that the a/c was blowing cold, cause it shows that it does work, but yeah if no airflow across the condenser, no way to get rid of the heat efficiently

but one sec please, let me look at a wiring diagram

friesm2000

iTrader: (4)

also what type of electrical test tools do you got, so know what we have to work with here, lol

friesm2000

iTrader: (4)

but first thing first, check this ground please, to make sure it is there, and intact (btw that is the washer bottle fill on the left)






it be the g201 one btw, just have to start with the basics

friesm2000

iTrader: (4)

also do you know if that courner on your has has ever been hit (accident damage)

youngson141

digital voltmeter but im an electronics student so if there's anything else i need, im sure the class has it.

can't see the picture!

friesm2000

iTrader: (4)

lol, you qouted me, and i still see the picture lol

friesm2000

iTrader: (4)

but anyways on the right frame rail that, up towards the front (near the abs pump and such, and washer bottle fill) there should be a bolt with like 5 wires coming off of it, make sure that ground is intact (thats the ground for the fans)

youngson141

it was my browser, switched to IE and i see it now

friesm2000

iTrader: (4)

but we can also start somewhere else too, with the car in the run position on the key (idiot lights on, but engine off), turn the a/c on, the fans should still kick on, if everything was good

then go to the fuse/relay box on the passenger/right side strut tower (that rectangle box), pull out the condensor fan relay, and also the radiator fan relay (it should be labeled on the top), then plug them back in, do you feel/hear them clicking once you put them back in

then report back lol


but all i am trying to do is break the system down into sections, with easily checked components

friesm2000

iTrader: (4)

i'm on firefox though , just switched recently also, f***ing IE

finally got fed up with it

youngson141

I'm gonna try this when I get back home if its not too dark.. A garage would be nice about this time!

friesm2000

iTrader: (4)

checking that ground yeah kinda need good lighting, but checking those relays though, not much light needed really, so those can be checked once you get home real fast

youngson141

grounds look good besides being a little covered in dirty and what not.

even in "run" and a/c on the fan didn't come on.. pulled relays and firmly pushed them back in (no click or anything but i FIRMLY pushed them in). Tried "run" again with a/c and still nothing

friesm2000

iTrader: (4)

ok then, it sounds like you got a power issue to the control side of the relays then, (or a gounding issue, which btw is the fan control module)


anyways did you happen to do anything in the center console recently (when the fans stopped), such as put in a new radio or something along those lines

youngson141

yea i did put a new radio in but it was having this problem before i did that, which was like a week before i put the radio in

friesm2000

iTrader: (4)

well then the radio might have to come back out (not really), but the center console and such has to be removed and such, if you eventually gotta get that fan control module

but one sec please and let me go take a picture, and put on where i want you to measure the voltage on it, one sec please

friesm2000

iTrader: (4)

please fill in each line


sorry not the best picture, and those are the fans relays btw
and for the red lines, please put with the second lead connected to the positive post of the battery
then on the blue lines with it connected to the negetive post of the battery
also do it with the car on, and the ac on also please



then those additional bigger terminals, if you jumper them together, the each fan should turn on respectively
so jumper them, but i don't think that is your issue though, it's more of an control issue i think, but if they turn on, that rules out that side of the circuit, since the fans would still be working

youngson141

they work, went back and tried this again and i heard them clicking and i could feel it also

the other things i'm gonna do after class tomorrow

friesm2000

iTrader: (4)

if so, then it is NOT a control issue, it is a power supply issue (or grounding) to the fans themselves



so now , basically do the same thing as above, but on those big terminals now, then also disconnect the fans (right on top of the fan itself) and measure the voltage on both wires while touching both the positive and negative terminals at separate times

youngson141

voltage at the fans were an even 13

i tried jumping them to the battery like piggylover said but got no response.

when i'm jumping the relays, its the bigger terminals to the left. Am i pretty much taking a jumper wire into both those terminals?

piggylover1985

If you jump it with battery power and it still not coming on, give it a really good ground too, if it still not coming on, your fan motor is N/G

youngson141

tried again after car sat awhile.. i even measured the voltage (a little over 12v) after grounding and connecting power to make sure i had something and still nothing on either fan

back to square one i guess also, i'm not getting any response from the relays when i'm putting them back in.

and when checking voltage at the plugs on top the fans, i'm not getting anything there either

friesm2000

iTrader: (4)

basically yes, just bypassing the relay, for testing purposes