Coolant Fans won't switch off - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 07-23-2015, 03:48 PM   #21
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Sounds like the relay is wired to latch on once it turns on. If settings are correct then I'd start looking into the wiring. I personally just rewired the fan circuit with a new fuse/relays.
patsmx5 is offline   Reply With Quote
Old 07-24-2015, 10:51 AM   #22
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

I don't think the port settings is what your'e looking for. Can you post a screen shot?
Because there should be TWO temperature settings there: one for when the fan comes on, and one for when the fan turns off. If you set them up backwards, the fans will turn on but never turn off after that.
18psi is offline   Reply With Quote
Old 07-24-2015, 11:18 AM   #23
Elite Member
iTrader: (8)
 
bahurd's Avatar
 
Join Date: Apr 2013
Location: Ohio
Posts: 2,126
Total Cats: 145
Default Coolant Fans won't switch off

I use an MS2 but I'm at customers for a few hours and don't have my laptop with me. <br /><br />Give me a couple hours and when I get back will post a couple screen shots to help you out.
bahurd is offline   Reply With Quote
Old 07-24-2015, 11:28 AM   #24
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

Quote:
Originally Posted by 18psi View Post
I don't think the port settings is what your'e looking for. Can you post a screen shot?
Because there should be TWO temperature settings there: one for when the fan comes on, and one for when the fan turns off. If you set them up backwards, the fans will turn on but never turn off after that.
He is in the correct place. MS2 does not have a "fan" drop down menu, that was added for MS3. Basically you use a generic output to control when the fan turns on and off. Attached is a picture from my friends 99 DIYPNP showing what it looks like. OP needs to put his threshold to 97c and then the hysteresis to 5. What it is saying is to turn the fan on when coolant reaches 97c and then turn it off when it drops 5c less then the threshold.

Attached Thumbnails
Coolant Fans won't switch off-h02h3d1.png  
shuiend is offline   Reply With Quote
Old 07-24-2015, 11:31 AM   #25
Murderator
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,192
Total Cats: 2,583
Default

I guess I'm forgetting how old ms2 actually is
18psi is offline   Reply With Quote
Old 07-24-2015, 11:50 AM   #26
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,877
Total Cats: 1,790
Default

i still run the cooling fan like that on ms3.

i use "fan control" to control the a/c fan.
Braineack is online now   Reply With Quote
Old 07-24-2015, 02:43 PM   #27
Elite Member
iTrader: (8)
 
bahurd's Avatar
 
Join Date: Apr 2013
Location: Ohio
Posts: 2,126
Total Cats: 145
Default Coolant Fans won't switch off

<p>Here's my TS screens and settings&nbsp;for the MS2E.&nbsp; You can convert to Centigrade.</p><p><img src="https://cimg4.ibsrv.net/gimg/www.miataturbo.net-vbulletin/1249x374/80-ts_fan1_ed3ec9b322ffa73a48897b3e09f538d5056f647a.p ng" title="" /><br /><br /><img src="https://cimg5.ibsrv.net/gimg/www.miataturbo.net-vbulletin/1259x865/80-ts_fan2_77317de62904892266c60a76c46475a8a700311d.p ng" title="" /><br /><br />&nbsp;</p><p>&nbsp;</p><br />I should add mine is an MS2E built by Reverent (MS Labs) if it matters.

Last edited by bahurd; 07-24-2015 at 03:11 PM.
bahurd is offline   Reply With Quote
Old 07-24-2015, 05:48 PM   #28
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,877
Total Cats: 1,790
Default

then you need to reach out to reverant--it matters.
Braineack is online now   Reply With Quote
Old 07-24-2015, 05:54 PM   #29
Elite Member
iTrader: (8)
 
bahurd's Avatar
 
Join Date: Apr 2013
Location: Ohio
Posts: 2,126
Total Cats: 145
Default

<p>
Quote:
Originally Posted by Braineack View Post
then you need to reach out to reverant--it matters.
</p><p>I'm not the one with the problem.&nbsp; The OP does&nbsp; and just showing him where the settings are&nbsp;in TS (on my MS2 FWIW).</p><p>&nbsp;</p>
bahurd is offline   Reply With Quote
Old 07-24-2015, 06:03 PM   #30
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,877
Total Cats: 1,790
Default

normal MS2 doesn't have a fan control setting. That's his custom firmware.
Braineack is online now   Reply With Quote
Old 07-27-2015, 03:50 PM   #31
Junior Member
Thread Starter
 
Join Date: May 2010
Location: Darlington, UK
Posts: 280
Total Cats: 0
Default

The only option I have is as per shuiend screen. I have no other option. I did try and adjust the settings but it still didn't turn the fan off.
The strange thing is that since I have been changing settings the fans will turn off when the ignition is switched off which is normal but when you turn the key back to put the ignition on the fans are now off until you Rev it a bit and get the temp up again.

It seems that whatever I change on tuner studio it doesn't seem to make a difference.

Is it possible my 2 x 80W fans from eBay wired in parallel are not enough to cool the coolant by 5 degrees and that's why the fan is not switching off?

The temp gauge on Tuner studio goes up to 93C then the fans cut in and then don't turn off. I changed the temp to 97 and it didn't seem to make a difference
ronniebiggs is offline   Reply With Quote
Old 07-27-2015, 03:52 PM   #32
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,877
Total Cats: 1,790
Default

Quote:
Originally Posted by 18psi View Post
what are the fan settings you're running
still waiting for this...

Braineack is online now   Reply With Quote
Old 07-27-2015, 04:18 PM   #33
Junior Member
Thread Starter
 
Join Date: May 2010
Location: Darlington, UK
Posts: 280
Total Cats: 0
Default

Quote:
Originally Posted by ronniebiggs View Post
Ok I found output port settings then PM5 Warmup LED which shows the output channel as coolant and the threshold of 93.3 and Hysteresis 5.6 is that it?
Hi Brain is this not what you need? That is what mine has in the same screen pas the one above. My temp is in degrees C.

What other settings do you need?
ronniebiggs is offline   Reply With Quote
Old 07-27-2015, 04:21 PM   #34
mkturbo.com
iTrader: (24)
 
shuiend's Avatar
 
Join Date: May 2006
Location: Charleston SC
Posts: 13,776
Total Cats: 1,106
Default

What happens if you set the fans to turn on at 97c, then restart the car. Are the fans on after the restart?
shuiend is offline   Reply With Quote
Old 07-27-2015, 04:26 PM   #35
Junior Member
Thread Starter
 
Join Date: May 2010
Location: Darlington, UK
Posts: 280
Total Cats: 0
Default

When I last tested no. They would turn off as soon as I turn the ignition off which is normal. But before they used to come straight back on when i turned the ignition to try and start the car. Now they stay off until the engine is started and then come back on after a few seconds of reving. They then stay on until you switch the ignition off
ronniebiggs is offline   Reply With Quote
Old 07-27-2015, 04:43 PM   #36
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Quote:
Originally Posted by ronniebiggs View Post
Another strange thing is if you turn the car off with the fan then turn the ignition on the fan stays off until they start to run again assuming they reach a given temp and then stay on again
Quote:
Originally Posted by patsmx5 View Post
Sounds like the relay is wired to latch on once it turns on. If settings are correct then I'd start looking into the wiring. I personally just rewired the fan circuit with a new fuse/relays.

Quote:
Originally Posted by ronniebiggs View Post
...
The strange thing is that since I have been changing settings the fans will turn off when the ignition is switched off which is normal but when you turn the key back to put the ignition on the fans are now off until you Rev it a bit and get the temp up again.....

Quote:
Originally Posted by patsmx5 View Post
Sounds like the relay is wired to latch on once it turns on. If settings are correct then I'd start looking into the wiring. I personally just rewired the fan circuit with a new fuse/relays.
Have you checked any of the wiring? Is it all stock? Has the wiring been modified in any way regarding the fan circuit?
patsmx5 is offline   Reply With Quote
Old 07-27-2015, 04:50 PM   #37
Junior Member
Thread Starter
 
Join Date: May 2010
Location: Darlington, UK
Posts: 280
Total Cats: 0
Default

I used the original stock wiring and then used a guide from this site to wire 2 fans in parallel by extending wires and introducing a relay. There is a chance I wired them wrong and that is my next job to check against the diagram if I can still find it as it was years ago when I wired them.
ronniebiggs is offline   Reply With Quote
Old 07-27-2015, 05:02 PM   #38
Elite Member
iTrader: (15)
 
patsmx5's Avatar
 
Join Date: Aug 2007
Location: Houston, TX
Posts: 8,797
Total Cats: 248
Default

Yeah I'd check it, especially if you added a relay. It sounds like when the fans turn on, the output that now turns on the fan motor is going to the input of the relay. So basically once the ECU turns the fan on, the relay "latches" itself on, and now the ecu can't turn it off. Only way to turn if off is to cut power from the relay (aka turn the key off).
patsmx5 is offline   Reply With Quote
Old 07-27-2015, 05:04 PM   #39
Junior Member
Thread Starter
 
Join Date: May 2010
Location: Darlington, UK
Posts: 280
Total Cats: 0
Default

I hope so Pat. I could really do with sorting this out and then moving onto my next issue. But I will save that for another day
ronniebiggs is offline   Reply With Quote
Old 03-12-2016, 02:00 PM   #40
Junior Member
Thread Starter
 
Join Date: May 2010
Location: Darlington, UK
Posts: 280
Total Cats: 0
Default

Quote:
Originally Posted by ronniebiggs View Post
I hope so Pat. I could really do with sorting this out and then moving onto my next issue. But I will save that for another day
Well sorry to resurrect this thread but just took the car out of storage since last time I posted and now I'm back on with trying to sort this out.

I think I have determined that it isn't a megasquirt issue as the fans cut in and then do go off when I turn the ignition off. The trouble is the fans won't turn off until the ignition is off.

That leads me to think it's the wiring and probably related to the relay. I have looked back at all the other threads and the only thing that stands out is that I didn't solve the yellow wire on the AC side I have these AC wires going to the 2nd fan and have no bridging wire over to the relay.

Then after messing around with the wires on the relay it appears that 1 wire is permanent live. One is live when the ignition comes on and one switches the fans on when put to ground.

When the fans cut in I can remove wires fro
The relay and I can get the normal fan to cut off. But no matter how many wires I remove the AC fan stays on and doesn't go off.

Anyone know how to wire the relay correctly?

Also just to check do they all have relays I can't remember if I added it or if it was already there.
ronniebiggs is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
MSPNPPro-MM0105: Coolant Temperature Output slomiata MEGAsquirt 5 10-07-2015 02:11 PM
Back to Stock Part Out!! Turbo Parts, MS2 Enhanced 01-05, Suspension, and MOAR! StratoBlue1109 Miata parts for sale/trade 16 10-02-2015 10:39 AM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM


Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 10:09 AM.