E67 Electric Fan Help please

[2Aspire]

Greetings, I have an E67 PCM with the attached tune. I used to have a LS1B and the Fan setting made sense. Now looking at this I do not know how to set these to trigger on and off.

Can someone please advise?

Thanks,

Matt

[400ss]

Greetings, I have an E67 PCM with the attached tune. I used to have a LS1B and the Fan setting made sense. Now looking at this I do not know how to set these to trigger on and off.

Can someone please advise?

Thanks,

Matt

there you have

[Taz]

400ss ... the PWM % breakpoints in that text document do not apply to this tune.

Matt, the PWM % breakpoints for the 2007 TBSS E67 tune that you posted are:
- Fan 1 OFF = 46%
- Fan 1 ON = 48%
- Fan 2 OFF = 85%
- Fan 2 ON = 90%

[400ss]

400ss ... the PWM % breakpoints in that text document do not apply to this tune.

Matt, the PWM % breakpoints for the 2007 TBSS E67 tune that you posted are:
- Fan 1 OFF = 46%
- Fan 1 ON = 48%
- Fan 2 OFF = 85%
- Fan 2 ON = 90%

True, my mistake, those posted by me are for the E38 right?

[Taz]

True, my mistake, those posted by me are for the E38 right?

Some full-size Trucks (E38) used the PWM % breakpoints that you posted. Camaro, Corvette, G8, etc. were different.

These values may be set to any percentage (%).

The two TBSS tunes from PCM of NC that you posted in your other thread, use different PWM % than any of the tunes discussed in this thread.

[400ss]

Some full-size Trucks (E38) used the PWM % breakpoints that you posted. Camaro, Corvette, G8, etc. were different.

These values may be set to any percentage (%).

The two TBSS tunes from PCM of NC that you posted in your other thread, use different PWM % than any of the tunes discussed in this thread.

thank you Sir, great to know , there is no much info about that.

[Taz]

Hi Matt … received your PM … will save receiving a dozen more from other people, if I answer in this thread.

Please refer to the PWM % breakpoints listed in post #3. These ONLY apply to your tune. Speartech has used unique breakpoints (especially for Fan 1).

Below is a picture of the ECT Fan Controls (G0901) from the tune that you posted (with descriptions added). You simply decide at what engine coolant temperature (ECT) you would like the fans to turn OFF or ON, then enter the corresponding PWM % breakpoint in the corresponding cell of the table. Once this is done, if there is a cell (or cells) between the values that you have entered, simply blend these in a linear fashion.

Hope this makes sense …. Gen IV tuning is very different from Gen III.

Took a very brief look at the rest of your tune - it is a MAF Only tune (i.e. it runs off of the MAF 100% of the time). Not sure if you have Forced Induction (turbocharger / supercharger) - the MAP and Fuel Injector data is a bit odd – hopefully it works OK for your application.

[2Aspire]

Thanks Taz!
I understand completely why you chose to respond here as this will help others that do not understand this configuration as well.

So a couple of questions.. How do you set the fans to turn on/off simultaneously as was the option in Gen III?

How do I set a target temp below 192? So say for instance I want to Turn both on at 195 and off at 185?

As for the Car, I do have a supercharger. Edelbrock Eforce with a Lingenfelter GT9 Blower Cam. It starts and runs but haven't done much with it outside of that until I have someone qualified to tune this platform. For now I was looking at some of the , what I thought would be "simple" stuff. I focused on fan settings as the one fan is not enough to cool it as was the case before when I had the Gen III set-up.

As always I greatly appreciate your advise.

Thanks! Matt

[Taz]

... How do you set the fans to turn on/off simultaneously as was the option in Gen III? ...

In the cell (G0901) at the temperature you wish both Fans to activate (turn ON), enter 92. All cells above this (hotter), set to 99.

In the cell (G0901) at the temperature you wish both Fans to deactivate (turn OFF), enter 40. All cells below this (colder), set to 25.

In the cells (G0901) between (if there are any) your turn OFF and turn ON entries, set to 87.



... How do I set a target temp below 192? So say for instance I want to Turn both on at 195 and off at 185? ...

To lower the table (G0901) range you need to apply a Patch. Make sure your V2 is plugged into your Notebook computer before you open your tune - this will load "hidden" parameters.

First, confirm the Patch has not already been applied. Open G0901 - if the table begins at 192 F, then the Patch has not been applied.

Next, in the Engine Operation folder, look for a RED folder - Operating System Patches. Open this folder, you will find a Cooling Fan Patch (B9904). It should display "Not Applied".

To activate the Patch, select "Applied", save the tune and exit the software. A Full-Flash of the E67 ECM is required to activate the Patch.

To work with the G0901 table in future, your V2 must be plugged in to your Notebook before you open the tune. The table range should now be altered - beginning at 160 F.

[2Aspire]

Excellent!

I will give this a try when I get back home this weekend.

Thanks Taz for your support! I greatly appreciate it!

Matt

[400ss]

MR Taz, could you help me with the PWM breakpoints for the tune im runing? PCM of NC? fans always run on high FAN when hit 93C, and when A/C on , it goes to high fans too..

[Taz]

Hello 400ss,

That tune is setup to have all 3 Fan outputs (Yes, there are 3 of them) active at the same time (concurrently). The way the tune is setup, it will only operate one fan – it looks more like it was setup for use with a Corvette PWM Fan Control Module.

Here are the PWM % breakpoints:
- Fan 1 OFF = 25%
- Fan 1 ON = 50%
- Fan 2 OFF = 50%
- Fan 2 ON = 90%
- Fan 3 OFF = 90%
- Fan 3 ON = 90%

That tune will not control 2 Fans individually. At 50%, all Fans will turn on – and at 25%, all Fans will turn off.

[400ss]

I see, thats why both fans always turn on together..

is there a way to work on the oem BASE tune i have and enable both fans, and make them work separately, thank for the help

[Taz]

...is there a way to work on the oem BASE tune i have and enable both fans, and make them work separately ...


Yes - that is what PCM of NC did (as a support to marketing their fan kits).

[400ss]

Yes - that is what PCM of NC did (as a support to marketing their fan kits).


sorry i dont fully understand, but im trying and i apreciate your help..

i have 2 tunes, the stock tune and the tune from PCM of NC..

-The tune of PCM of NC i have is not able to turn low fan and high fan separetely because it was patched that way or simply because G0901 on the tune is setup that way??, meaning i can changue the breakpoint and enable low and high fan separately or this is not possible with this tune?

-If cant be enables that way on the tune from PCM on NC how do i enable like i need it on the STOCK OEM TUNE I HAVE??

This is my personal truck, it is a 05 Chevrolet Silverado, it has dual fans, wired like stockform, work in paralel and inseries, and i would like to have the fans working in low speed and in high speed only when needed..

really trying to work on this and im sorry if im overcomplicating this but english is not my native lenguage and is not easy for me thanks in advance

[Taz]

You communicate very well, I have no problem understanding your posts.

Like you, I operate a business. I help out enthusiasts when I am able, and when this help does not conflict with my business offerings. Sometimes this help is at no cost, and sometimes I charge a nominal fee - to be fair to others who have previously paid for this same service.

Whether this is your own vehicle, or a customer's vehicle, you will gain knowledge from this project, that will be applied to your future business offerings. I have built more than a few test vehicles over the years - I kept some of these vehicles, and others I sold after testing had been completed.

I do not provide no cost services to other businesses.

If you are interested in purchasing this service, send me a PM, and we could then discuss your options.

[400ss]

You communicate very well, I have no problem understanding your posts.

Like you, I operate a business. I help out enthusiasts when I am able, and when this help does not conflict with my business offerings. Sometimes this help is at no cost, and sometimes I charge a nominal fee - to be fair to others who have previously paid for this same service.

Whether this is your own vehicle, or a customer's vehicle, you will gain knowledge from this project, that will be applied to your future business offerings. I have built more than a few test vehicles over the years - I kept some of these vehicles, and others I sold after testing had been completed.

I do not provide no cost services to other businesses.

If you are interested in purchasing this service, send me a PM, and we could then discuss your options.

PM sent, thank you