Donate to the MX-3.com Forums
View unanswered posts | View active topics It is currently July 04 2020, 11:35 AM



Reply to topic  [ 24 posts ]  Go to page 1, 2  Next
 cooling fan motor 
Author Message
Regular Member

Joined: December 20 2009, 1:58 PM
Posts: 45
Reply with quote
Post cooling fan motor
In the process of replacing my heater hose, I discovered my primary cooling fan does not work. How hard is it to replace the motor? The blades are still in great condition.

Pat


May 19 2012, 9:38 AM
Profile
Senior Member
User avatar

Joined: April 07 2008, 1:06 PM
Posts: 7198
Location: Manitoba
Reply with quote
Post Re: cooling fan motor
Its easier just to replace the entire unit. I'm pretty sure there are a lot of interchangeable rads from same-era 323/escort/etc.

How did you test to see if it was dead?

_________________
Now with Moderator power!

Black '93 BP RS - wrecked, parted, scrapped.
Green GS - Sold.
Black GS - Summer DD/Race car - Fancy KLZE
Red GS - K8-ATX -> MTX-KLDE - Frakencar. Scrapped
White GS - Rusty. Parts. Scrapped
1997 BMW M3 - my summer baby
2002 BMW 325Xi - sold
2003 Forester Xti - EJ20K swapped.
Feedback


May 19 2012, 10:28 AM
Profile
Regular Member

Joined: December 20 2009, 1:58 PM
Posts: 45
Reply with quote
Post Re: cooling fan motor
I replaced the fuse first and the fan would not kick on. Can you tell me when the fan should come on?


May 19 2012, 2:18 PM
Profile
Senior Member
User avatar

Joined: April 07 2008, 1:06 PM
Posts: 7198
Location: Manitoba
Reply with quote
Post Re: cooling fan motor
the easiest way is to let the car run, and then unplug the green coolant sensor. default on that sensor failure is fan on.

Another way, that assumes your TPS works, is to put it in diagnostic mode (jump TEN and GND with something metal like wire or a paperclip) and then blip the throttle by hand. If the TPS reads off-idle, the fan is triggered.


You can also apply 12v directly to the fan connector, if you're really old school :P

_________________
Now with Moderator power!

Black '93 BP RS - wrecked, parted, scrapped.
Green GS - Sold.
Black GS - Summer DD/Race car - Fancy KLZE
Red GS - K8-ATX -> MTX-KLDE - Frakencar. Scrapped
White GS - Rusty. Parts. Scrapped
1997 BMW M3 - my summer baby
2002 BMW 325Xi - sold
2003 Forester Xti - EJ20K swapped.
Feedback


May 19 2012, 3:14 PM
Profile
Regular Member

Joined: December 20 2009, 1:58 PM
Posts: 45
Reply with quote
Post Re: cooling fan motor
Where is the green coolant sensor located? The same question goes for the TPS sensor? How can you tell if the TPS works?


May 19 2012, 8:11 PM
Profile
Senior Member
User avatar

Joined: April 07 2008, 1:06 PM
Posts: 7198
Location: Manitoba
Reply with quote
Post Re: cooling fan motor
Sorry, I had no idea what level you're on with the car.

Assume your TPS works (throttle position sensor).

Find the DIAGNOSTIC box in the engine bay, little black box, says that on the lid. Inside, jump the pins TEN and GND with a little bit of wire or a paperclip. Turn the ignition to ON, no need to start it, and then just press the throttle. The rad fan should come on.

_________________
Now with Moderator power!

Black '93 BP RS - wrecked, parted, scrapped.
Green GS - Sold.
Black GS - Summer DD/Race car - Fancy KLZE
Red GS - K8-ATX -> MTX-KLDE - Frakencar. Scrapped
White GS - Rusty. Parts. Scrapped
1997 BMW M3 - my summer baby
2002 BMW 325Xi - sold
2003 Forester Xti - EJ20K swapped.
Feedback


May 20 2012, 3:36 AM
Profile
Regular Member

Joined: December 20 2009, 1:58 PM
Posts: 45
Reply with quote
Post Re: cooling fan motor
If I do that, will that tell me the motor is bad or the tps sensor is bad? I have very little car exp. My brother does most if not all the work for me.

Thanks for all the help.


May 20 2012, 7:55 AM
Profile
Regular Member

Joined: December 20 2009, 1:58 PM
Posts: 45
Reply with quote
Post Re: cooling fan motor
Just in case, I have 94 mx-3 with a 1.6L motor. Where would the diagnostic box be located in the engine compartment?


May 20 2012, 8:50 AM
Profile
Senior Member
User avatar

Joined: April 07 2008, 1:06 PM
Posts: 7198
Location: Manitoba
Reply with quote
Post Re: cooling fan motor
I believe all of them are driver side, against the firewall. (the wall between the passenger and engine compartments)

_________________
Now with Moderator power!

Black '93 BP RS - wrecked, parted, scrapped.
Green GS - Sold.
Black GS - Summer DD/Race car - Fancy KLZE
Red GS - K8-ATX -> MTX-KLDE - Frakencar. Scrapped
White GS - Rusty. Parts. Scrapped
1997 BMW M3 - my summer baby
2002 BMW 325Xi - sold
2003 Forester Xti - EJ20K swapped.
Feedback


May 20 2012, 11:03 AM
Profile
Senior Member

Joined: August 25 2004, 2:01 AM
Posts: 5554
Location: Edmonton, Alberta, Canada
Reply with quote
Post Re: cooling fan motor
12V to the motor is really pretty easy. it's only a two wire plug. Jump one to ground and the other to the positive battery terminal. Even if you do it backwards it will just spin the wrong way.

If it doesn't spin it doesn't work. I have had a rad fan motor crap out on me on my first RS like 8 years ago...so it does happen.

_________________
94' RS/GS/MS/CF Monster Turbo...coming soon.
93' GS SE, the Black Beast, the former love of my life...soon to be gutted and crushed.
94' GS, black on black, now in several small pieces...and one large crushed piece.
2007 Mazda3 GT Sport --- super fun
2004 Honda RC51 --- Lost forever to some theavin' bastard
My Worklog
My feedback thread
Never attribute to malice that which can be adequately explained by stupidity.


May 20 2012, 11:53 AM
Profile
Regular Member

Joined: December 28 2004, 2:38 AM
Posts: 225
Location: E OK
Reply with quote
Post Re: cooling fan motor
The green coolant sensor, also called thermosensor, is on the side of the engine's head, just behind the distributor (the black cylindrical thing the plug wires connect to).
That heater hose you had to deal with, it's pretty close to where it connects to the engine.
If you stand by the driver side fender, look over the airbox at the side of the engine, about 3-4 inches to the right of the distributor and down a few inches, you'll see it.
The TPS is located on the throttle body, which is where the intake hose (from the airbox) attaches to the engine. It has a 4-wire connector, but I've yet to do anything to mine, so cannot advise further on it...

When checking a fan motor, I've always done what wytbishop described

_________________
93 GS, ATX to MTX swap, chrome 16x7, upper strut bars, SRD LCA bushings.
Upcoming improvements: Tokico/Eibach struts/springs, energy suspension LCA bushings
94 RS MTX, Engine swap completed, ALIVE Again!
95 RS ATX, parts car/project X


May 20 2012, 6:41 PM
Profile
Regular Member

Joined: December 20 2009, 1:58 PM
Posts: 45
Reply with quote
Post Re: cooling fan motor
Got it. Thanks for all the help. I'll keep ya posted.


May 20 2012, 7:57 PM
Profile
Regular Member

Joined: December 20 2009, 1:58 PM
Posts: 45
Reply with quote
Post Re: cooling fan motor
All right guys.....Here is the update, I have replaced the cooling fan motor. The fan still did not turn on. In the process, I also replace the coolant temp sensor. What else do I need to check to see what would cause the fan to turn on? The mechanic did put a 12v power source to the fan and it does work. Any ideas??


June 04 2012, 10:19 AM
Profile
Senior Member
User avatar

Joined: May 25 2002, 2:01 AM
Posts: 11212
Location: CFB Val-Cartier, Quebec, Canada
Reply with quote
Post Re: cooling fan motor
Isn't there a relay for it?

_________________
1992 Mazda Mx-3 GSR - 2.5L KLZE : Award Winning Show Car & Race Car ['02-'09] (Retired)
2004 Mazda RX-8 GT - Renesis Wankel : LS3 Coils, BHR Mid-Pipe + Falken RT-615K 245/40r18
2011 Mazda Mazda2 GS - 1.5L Manual : Yozora Edition (1 of 500)
2003 Nissan Xterra SE - 4x4 Supercharged : 2" Body Lift, 4" Suspension Lift & 33" MTR Kevlar
2001 Nissan Frontier SE - The Frontrailer : Expedition/Off-Road Trailer Project


June 04 2012, 11:09 AM
Profile ICQ WWW
Supporting Member
User avatar

Joined: May 21 2002, 2:01 AM
Posts: 1885
Location: La Selva Beach, California
Reply with quote
Post Re: cooling fan motor
You can test the fan to see if it's bad. Just unplug the harness and connect power and ground to it.

_________________
06 Mazdaspeed6 2.3T
93 626 ES 2.5
92 Mx-3 RS 1.6
93 Mx-3 GS 2.5
93 Mx-3 RS 1.6


June 04 2012, 11:43 AM
Profile YIM
Display posts from previous:  Sort by  
Reply to topic   [ 24 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: No registered users and 5 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.