Thermo fan sensors - EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

Notices
EcuFlash
Sponsored by:
Sponsored by:

Thermo fan sensors

Reply

 
 
 
Old Aug 7, 2018, 09:36 PM
  #1  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
Thermo fan sensors

Hi,

Interesting issue happening. When I turn on ACC. with out starting car, my Main Cooling Fan or THermo Fan kicks on, I have noticed it been running all the time now. I have checked all the V7 Tables and looked at settings, and it should not be doing this based on duty and temp. However, also with in my xml definition on the 9417 ROM, I noticed (2) tables that talk about sensor fault and sensor fail... Its doing this with air temps of 60 degrees F or 15 degrees C. Very weird for it to do this. Maybe the fan relay is going out, for it is the stock unit from day one on the car...2004.

Can any one point me to what sensors the Main or Thermo Fan runs off of so I can check those sensors for fault? Common sense says Water Temp Sensor, but I can verify that it is reading, I would say rather accurately. I'm just trying to figure out why it is running all the time.

Thanks in advance,
Raceghost is offline  
Reply With Quote
Old Aug 8, 2018, 01:14 PM
  #2  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
Bump
Raceghost is offline  
Reply With Quote
Old Aug 8, 2018, 02:28 PM
  #3  
Evolved Member
 
Biggiesacks's Avatar
 
Join Date: Aug 2005
Location: The Bay Area
Posts: 2,914
Thanked 173 Times in 167 Posts
Your control module is dead. I have a thread about it here:
https://www.evolutionm.net/forums/evo-electrical-audio-security/743349-radiator-fan-controller-bought-farm.html
Biggiesacks is offline  
Reply With Quote
The Following User Says Thank You to Biggiesacks For This Useful Post:
Raceghost (Aug 8, 2018)
Old Aug 8, 2018, 04:09 PM
  #4  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
Thanks for the heads up. How is yours working now that it has been going on for a year?
Raceghost is offline  
Reply With Quote
Old Aug 8, 2018, 05:15 PM
  #5  
Evolved Member
 
Biggiesacks's Avatar
 
Join Date: Aug 2005
Location: The Bay Area
Posts: 2,914
Thanked 173 Times in 167 Posts
Originally Posted by Raceghost View Post
Thanks for the heads up. How is yours working now that it has been going on for a year?
Your welcome I actually tested both speeds with evoscan a few weeks back and it worked no problem.
Biggiesacks is offline  
Reply With Quote
Old Aug 8, 2018, 05:17 PM
  #6  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
I actually tested both speeds with evoscan a few weeks back and it worked no problem.
SMH, I always forget about the actuators in EvoScan...lol. DOH!
Raceghost is offline  
Reply With Quote
Old Aug 8, 2018, 06:18 PM
  #7  
Evolved Member
 
Biggiesacks's Avatar
 
Join Date: Aug 2005
Location: The Bay Area
Posts: 2,914
Thanked 173 Times in 167 Posts
Originally Posted by Raceghost View Post
SMH, I always forget about the actuators in EvoScan...lol. DOH!
Haha yah they do come in handy for testing electrical circuits.
Biggiesacks is offline  
Reply With Quote
Old Aug 10, 2018, 09:43 AM
  #8  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
Hey Biggie, so I just did the actuator test, and both speeds work, though I haven't changed out the module? The fan that turns on when I turn key to accessory is the inside fan, or fan between radiator and turbo. Seems like the actuator turns on the fan between the bumper and radiator. What do you make of this?
Raceghost is offline  
Reply With Quote
Old Aug 10, 2018, 10:15 AM
  #9  
Evolved Member
 
mines5's Avatar
 
Join Date: Oct 2010
Location: Streets of willow
Posts: 770
Thanked 15 Times in 15 Posts
Can you share your thermo fan duty tables ?
mines5 is offline  
Reply With Quote
Old Aug 10, 2018, 10:21 AM
  #10  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
Can you share your thermo fan duty tables ?
All stock, verified against 3 different stock roms. Also loaded stock 9417 and 9653, with no change.

Ok, just ran actuator test again. Fan between Radiator and Turbo, no change. Actuator turns on Fan between bumper and Radiator, though it sounds same speed with both High and low actuators, but does turn off and on with actuators.

Last edited by Raceghost; Aug 10, 2018 at 10:34 AM.
Raceghost is offline  
Reply With Quote
Old Aug 10, 2018, 10:39 AM
  #11  
Evolved Member
 
Biggiesacks's Avatar
 
Join Date: Aug 2005
Location: The Bay Area
Posts: 2,914
Thanked 173 Times in 167 Posts
Originally Posted by Raceghost View Post
Hey Biggie, so I just did the actuator test, and both speeds work, though I haven't changed out the module? The fan that turns on when I turn key to accessory is the inside fan, or fan between radiator and turbo. Seems like the actuator turns on the fan between the bumper and radiator. What do you make of this?
If the main fan (the one between the radiator and turbo) always turns on with your ignition then its control module is probably toast (mine failed to a closed circuit). The other fan doesn't have a control module so i think its just a one speed controlled by an ecu triggered relay. The main fan operates off a PWM signal from the ECU.

Last edited by Biggiesacks; Aug 10, 2018 at 11:00 AM.
Biggiesacks is offline  
Reply With Quote
The Following User Says Thank You to Biggiesacks For This Useful Post:
Raceghost (Aug 10, 2018)
Old Aug 10, 2018, 11:44 AM
  #12  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
I am sourcing one for test, I will get back to you. Thanks
Raceghost is offline  
Reply With Quote
Old Aug 10, 2018, 10:37 PM
  #13  
Evolved Member
Thread Starter
iTrader: (3)
 
Raceghost's Avatar
 
Join Date: Dec 2001
Location: Out West
Posts: 1,022
Thanked 17 Times in 17 Posts
It was the Fan Module. Picked on up from the local Mitsu Dealer today for they just happened to have one in stock. Cost me $250 but they owed me some credit for some trade work, so free 99.
Raceghost is offline  
Reply With Quote
Old Aug 11, 2018, 07:07 AM
  #14  
Evolved Member
 
Biggiesacks's Avatar
 
Join Date: Aug 2005
Location: The Bay Area
Posts: 2,914
Thanked 173 Times in 167 Posts
Originally Posted by Raceghost View Post
It was the Fan Module. Picked on up from the local Mitsu Dealer today for they just happened to have one in stock. Cost me $250 but they owed me some credit for some trade work, so free 99.
Nice, 250 is painful but at least you know you aren't rolling the dice.
Biggiesacks is offline  
Reply With Quote
 
 
 


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.