PWM cooling fan(s) control using ECM

[andrewb70]

Originally Posted by SlowProgress

That looks like it. I am interested in the shell, seals, large terminal and the small PWM terminal for the mating side (socket side). See slightly better photo below.



Thanks,

Scott

Scott or Scot,

Anyone care to post the information on this connector? Manufacturer? Series? etc...?

Andrew

[erick_e]

Originally Posted by andrewb70

Scott or Scot,

Anyone care to post the information on this connector? Manufacturer? Series? etc...?

Andrew

If it's the same connector that the SPAL brushless uses it's a Yazaki connector, I tried to source one without much success so I just bought the SPAL version which is assembled by Chief Enterprises

[andrewb70]

So I found some interesting information regarding the C6 fan controller and the Yazaki connectors. Someone on YB reported that the 2006-2009 Ford Fusion uses the same controller as the C6. So I went to the Pull-A-Part and their inventory showed two in stock. One had the whole front end missing, so that was a bust, but the other was mostly intact and had the radiator removed and was sitting on the engine, as if presenting itself. Low and behold, on the fan shroud was a very familiar finned aluminum box. I had to borrow a T25 Torx, but after a minute I had the controller off. The connector at the controller looked exactly like the Kostel connector that we've been sourcing from Mouser. On the power feed side was a mondo Yazaki male connector. Of course on the chassis wiring side was a matching female connector. I scored the whole thing, took it home, plugged it into my Cougar and it worked perfectly.

Today I went back and got the female Yazaki connector from the Fusion that had the front end missing. These connectors are super robust and by the accounts here, should fit the new CTSV/ATSV fans with the built in controller.

Now, if we can only find the part numbers for the large female terminals, then we will be all set!

Andrew

[andrewb70]

Here is the controller I pulled from the Ford Fusion...



It had marking on the sticker, but I accidentally wiped them off when I was cleaning it. It had the same wiring diagram as the C6 controller, with the only difference being this one is made in Mexico. Presumably to cut cost for the Ford Fusion.

Andrew

[andrewb70]

The information below is for a Holley HP or Dominator system, but I thought it would be handy to post it here.


So recently a buddy of mine presented me with a challenge. He has a street car that uses a Dominator ECU and he is using the C6 fan controller, just like I am. However, his car has A/C and he wanted to have the fan turn on at a predefined duty cycle whenever the A/C kicks on. I also know that some of you have the desire to be able to toggle the fan to full speed while at the track, and with the configuration that I previously posted, this is not possible. There may be other ways to do this, but this is what I came up with and it seems to work very well. I am testing it with a manual trigger through a virtual switch on my Holley 7" dash, but any switch will work, including a A/C compressor trigger.

First you need to create an Input and assign it to a pin (hopefully y'all know how to do that already). In my case I created a 20v sensor, but I see no reason why creating a 5v sensor wouldn't work either...



Then you have to configure the sensor. I chose the Custom 20v from the dropdown menu and gave the sensor a minimum value of 0 and a max of 1. Essentially what I am doing is creating a binary switch. The reason for doing this is that simple 12+ or Ground triggers are not selectable in the PWM table, but custom sensors are!



Here is the bottom of the screen...On the bottom scale, half the values are given a value of zero and the rest ramps up from 10-20v. Then I configure voltage values of zero to be zero and voltage values above 10v to have a value of 1.




Now we can move to the PWM output screen and configure it. The Y-axis remains CTS but instead of having MPH on the X-axis, as I used to have, now I select the new A/C sensor that I created. The resulting table looks like this:




This essentially splits the PWM table into to different conditions and they function independently, based on whether the trigger we created is ON (value 1) or OFF (value 0)...This set-up should work just fine for anyone that wants to turn their fan on at the drag strip...but it creates a different situation if you want the fan on when the A/C is on. With this configuration, even at highway speeds, the fan will be running at 50% (or whatever we assign to the cell of value 1 on the X-axis), which isn't really needed or desirable. In order to fix this, I have created conditional sensor triggers that will activate the PWM table.



I have set MPH as a trigger and set it to activate the table at speeds below 30 mph, and I also set the table to activate when temperatures are above 200 degrees. So in my friends case, with the A/C ON the fan will operate at 50% while at speeds below 30mph. Above that speed the fan is OFF, even when the A/C ON, however, if the CTS goes above 200 degrees, the table PWM table is activated again. Also keep in mind that the whole left side of the PWM table can have different values in all the cells. So you can have a minimum of 50%, but if CTS starts climbing, higher fan speeds can be commended.

With the A/C OFF, again, the right side of the PWM table is activated below 30 mph (this of course can be changed) or when the CTS goes above 200 degrees (this too can be changed).

This configuration should work for different set-ups and scenarios but the trigger values will have to be tuned to your particular combinations. This is due to variance in fans, hoods, thermostats, etc....

Any and all comments are welcome...

Andrew

[mikentosh]

Originally Posted by andrewb70

The information below is for a Holley HP or Dominator system, but I thought it would be handy to post it here.

Andrew, great information! I was a little stumped on how to get the A/C to trigger the PWM fans, so will try this now. Thanks!

[Larry R]

Originally Posted by andrewb70

The information below is for a Holley HP or Dominator system, but I thought it would be handy to post it here.


So recently a buddy of mine presented me with a challenge. He has a street car that uses a Dominator ECU and he is using the C6 fan controller, just like I am. However, his car has A/C and he wanted to have the fan turn on at a predefined duty cycle whenever the A/C kicks on. I also know that some of you have the desire to be able to toggle the fan to full speed while at the track, and with the configuration that I previously posted, this is not possible. There may be other ways to do this, but this is what I came up with and it seems to work very well. I am testing it with a manual trigger through a virtual switch on my Holley 7" dash, but any switch will work, including a A/C compressor trigger.

First you need to create an Input and assign it to a pin (hopefully y'all know how to do that already). In my case I created a 20v sensor, but I see no reason why creating a 5v sensor wouldn't work either...



Then you have to configure the sensor. I chose the Custom 20v from the dropdown menu and gave the sensor a minimum value of 0 and a max of 1. Essentially what I am doing is creating a binary switch. The reason for doing this is that simple 12+ or Ground triggers are not selectable in the PWM table, but custom sensors are!



Here is the bottom of the screen...On the bottom scale, half the values are given a value of zero and the rest ramps up from 10-20v. Then I configure voltage values of zero to be zero and voltage values above 10v to have a value of 1.




Now we can move to the PWM output screen and configure it. The Y-axis remains CTS but instead of having MPH on the X-axis, as I used to have, now I select the new A/C sensor that I created. The resulting table looks like this:




This essentially splits the PWM table into to different conditions and they function independently, based on whether the trigger we created is ON (value 1) or OFF (value 0)...This set-up should work just fine for anyone that wants to turn their fan on at the drag strip...but it creates a different situation if you want the fan on when the A/C is on. With this configuration, even at highway speeds, the fan will be running at 50% (or whatever we assign to the cell of value 1 on the X-axis), which isn't really needed or desirable. In order to fix this, I have created conditional sensor triggers that will activate the PWM table.



I have set MPH as a trigger and set it to activate the table at speeds below 30 mph, and I also set the table to activate when temperatures are above 200 degrees. So in my friends case, with the A/C ON the fan will operate at 50% while at speeds below 30mph. Above that speed the fan is OFF, even when the A/C ON, however, if the CTS goes above 200 degrees, the table PWM table is activated again. Also keep in mind that the whole left side of the PWM table can have different values in all the cells. So you can have a minimum of 50%, but if CTS starts climbing, higher fan speeds can be commended.

With the A/C OFF, again, the right side of the PWM table is activated below 30 mph (this of course can be changed) or when the CTS goes above 200 degrees (this too can be changed).

This configuration should work for different set-ups and scenarios but the trigger values will have to be tuned to your particular combinations. This is due to variance in fans, hoods, thermostats, etc....

Any and all comments are welcome...

Andrew

I am trying to replicate or at least to use what you created here for my car. I cannot get the LH column on the calibration table to accept the number 1 as you have in your post. Also you will note it says "A/C (x10)" but I did not put that in so I do not know where that came from. Any help you can offer will be appreciated. Larry

[andrewb70]

The input needs to be "custom 20v" not custom 5v.

Andrew

[CarlC]

Originally Posted by andrewb70

Now, if we can only find the part numbers for the large female terminals, then we will be all set!
Andrew

Andrew,

Have you tried searching here ? https://apps.us.yazaki.com/Component...temPN=71164036

You may have to take some measurements and do a deep-dive into the drawings but they should be in there.

Delphi terminals and connectors are soooooooo much easier.

[will69camaro]

I appreciate this thread guys and all the information in it. Been setting up the programming in mine and having some success so far using the c6 module and the Holley system. Can't wait to play with it more.

May have similar logic setup to the last example with the AC switch.