MSPNP MSPNP specific Megasquirt related discussion.

Fan output not working anymore

Thread Tools
 
Search this Thread
 
Old 01-30-2015 | 06:09 PM
  #1  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default Fan output not working anymore

This is a DIYautotune MS2 wherein the fan output (output 1 set to >190 coolant) does not work anymore. It work for two week before today and all of a sudden it does not turn on the fan anymore. I checked the motor with a direct 12v cable and the fan motor is not the problem. Any suggestions? Thanks
Old 02-02-2015 | 11:46 AM
  #2  
Matt Cramer's Avatar
Supporting Vendor
 
Joined: Sep 2006
Posts: 2,332
Total Cats: 67
Default

Can you enable Port Status in the project properties, then make a data log of when the fan should come up? Then post the log and your MSQ.
__________________
Matt Cramer
www.diyautotune.com
Old 02-03-2015 | 10:52 PM
  #3  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

I went ahead and took a log. I changed the settings in the temp threshold to see if anything happened. All I saw is the On/Off out put goes to 4.0 then 0. I also measured the voltage on the positive cable at the fan while it was supposed to be running and it read very low 0.5 mv or so. Attached is the log
Attached Files
File Type: msl
2015-02-02_14.52.14.msl (689.0 KB, 97 views)
Old 02-04-2015 | 09:20 AM
  #4  
Matt Cramer's Avatar
Supporting Vendor
 
Joined: Sep 2006
Posts: 2,332
Total Cats: 67
Default

I would also like to check the MSQ file.
__________________
Matt Cramer
www.diyautotune.com
Old 02-04-2015 | 11:38 AM
  #5  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

Here
Attached Files
File Type: msq
2015-02-04_10.38.26.msq (108.7 KB, 218 views)
Old 02-05-2015 | 10:45 AM
  #6  
Matt Cramer's Avatar
Supporting Vendor
 
Joined: Sep 2006
Posts: 2,332
Total Cats: 67
Default

Ok, looks like the ECU "thinks" it's turning the fan on. Can you check if the fan output is pulled to ground when this happens? If not, the issue is on the MicroSquirt Module; please contact us directly at websales@diyautotune.com if you would like to set up a repair.
__________________
Matt Cramer
www.diyautotune.com
Old 02-05-2015 | 08:22 PM
  #7  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

How would I check if the ouput is pulled to ground?
Old 02-06-2015 | 09:12 AM
  #8  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 79,818
Total Cats: 4,152
From: Chantilly, VA
Default

does the fan run when you jump tfa and gnd?
Old 02-06-2015 | 11:22 AM
  #9  
Matt Cramer's Avatar
Supporting Vendor
 
Joined: Sep 2006
Posts: 2,332
Total Cats: 67
Default

Originally Posted by buffon01
How would I check if the ouput is pulled to ground?
Use a volt meter. You should have 12 volts with the output off and 0 with it on.
__________________
Matt Cramer
www.diyautotune.com
Old 02-08-2015 | 06:24 PM
  #10  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

Originally Posted by Braineack
does the fan run when you jump tfa and gnd?
I hear a click but the fan does not come on.

Originally Posted by Matt Cramer
Use a volt meter. You should have 12 volts with the output off and 0 with it on.
To be more exact is where do I measure this? at the ECU or at the fuse?
Old 02-09-2015 | 11:43 AM
  #11  
Matt Cramer's Avatar
Supporting Vendor
 
Joined: Sep 2006
Posts: 2,332
Total Cats: 67
Default

At the ECU output pin. No 12V when off - something's wrong with the wiring. No 0V when on - something's wrong with the ECU.
__________________
Matt Cramer
www.diyautotune.com
Old 02-09-2015 | 11:51 AM
  #12  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 79,818
Total Cats: 4,152
From: Chantilly, VA
Default

Originally Posted by buffon01
I hear a click but the fan does not come on.
the click is the fan relay, sounds like the fan itself it dead...
Old 02-09-2015 | 03:27 PM
  #13  
harrybeachdog's Avatar
Junior Member
 
Joined: Nov 2013
Posts: 53
Total Cats: 6
From: Atlanta, GA
Default

Subbed for same problem. But TFA-GND does kick mine on. Didn't OP say that the fan works when given another 12v source?
Old 03-27-2015 | 03:30 PM
  #14  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

Alright so a little update. I got the car running again and magically the issue went away. Could it be the MS since I tried the jumper on the diagnostic and nothing then it work after when MS did run the fan output?

Also Im trying to run the Boost output to my EBC and every time I turn output on I get an error and TS goes crazy, the fan shuts down, etc... Then I turn the Boost output off and everything returns to normal.
Attached Thumbnails Fan output not working anymore-boost-output-error-.jpg  
Old 03-28-2015 | 09:12 PM
  #15  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

Aaaaand it's gone again. Now the car loops like crazy even with the idle valve disconnected and the screw at the TB on the lowest setting the car wont come down from 1200 at the lowest. During warm up it loops from ~2k to ~3k and slowly decreases once it warms up. I have no clue what's happening :'((
Old 03-29-2015 | 05:43 PM
  #16  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

Any ideas??
Old 03-29-2015 | 09:19 PM
  #17  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 79,818
Total Cats: 4,152
From: Chantilly, VA
Default

maybe the relay is on the way out.
Old 03-30-2015 | 01:31 PM
  #18  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

Originally Posted by Braineack
maybe the relay is on the way out.
Which relay?
Old 03-30-2015 | 01:59 PM
  #19  
Braineack's Avatar
Boost Czar
iTrader: (62)
 
Joined: May 2005
Posts: 79,818
Total Cats: 4,152
From: Chantilly, VA
Default

the fan relay...
Old 03-30-2015 | 07:31 PM
  #20  
buffon01's Avatar
Thread Starter
Elite Member
iTrader: (9)
 
Joined: Sep 2008
Posts: 5,609
Total Cats: 13
From: Michigan
Default

Thanks Idk what I was thinking...


I thought of making a new thread but rather just keep it here instead. I am having issues with idle, during warm up the rpm oscillates and sometimes goes to about 3k rpm with open loop setting regardless of any input to PWM. During close loop it starts normal then gradually increases and settles at 2k rpm till about 160* F then settles to a normal idle

This is a log I took with the open loop settings and you can see the oscillations. At that time I remember decreasing the WUE and the saw the rpm drops but remains unsteady.


Second I enabled closed loop setting to see what it would do and it does not reach 3k rpm but remains at 2k rpm till about 160*F then settles at ~900-1000 rpm
Attached Thumbnails Fan output not working anymore-pwm-idle-duty-high-rpm-cold-start.jpg   Fan output not working anymore-pwm-idle-duty-high-rpm-cold-start-open-loop.jpg  
Attached Files
File Type: msq
2015-03-30_15.19.03.msq (108.8 KB, 146 views)

Last edited by buffon01; 03-30-2015 at 07:48 PM.



All times are GMT -4. The time now is 06:20 AM.