E67 Discrete two fan wiring and settings

I know this has been up for discussion before but I got some strange behaviour that I want to sort out before closing the harness.

Have a LSA with a 6L90E from a ZL1 Camaro 2013 that is going into a Impala 1959.
Have done a stock harness cleanup and added external fusebox/relays.
Engine starts fine and transmission is alive, on a pallet.

I have now done the two speed fan wiring as on the stock harness as on the schematics down below and is trying to test the functionality.


Testing in DVT
This makes some confusing results?!?
Cooling Fan Relay #1 OFF
Cooling Fan Relay #2 OFF
Nothing

Cooling Fan Relay #1 ON
Cooling Fan Relay #2 OFF
Nothing

Cooling Fan Relay #1 OFF
Cooling Fan Relay #2 ON
High speed fan ON

Cooling Fan Relay #1 ON
Cooling Fan Relay #2 ON
Low speed fan ON
High speed fan ON


Now the E67
Added the patch B9904 Cooling Fan Operation Range Patch.
Setup G0901 as this (for testing purposes)
76 0,000000
78 25,999451
81 39,999389
84 50,999450
87 64,999389
90 91,000366
92 91,000366
95 91,000366
98 91,000366
101 91,000366

Now I do the real world test, putting the ECT sensor in boiling water.
Fans will not start?!?

What am I missing, will not the fans start without the engine running first?

You need to adjust settings in the Fan settings section that aren't available in EFILive. You will need to supplement with another tuning suite or have someone patch your tune file for you.

Quote:

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Originally Posted by ScarabEpic22

You need to adjust settings in the Fan settings section that aren't available in EFILive. You will need to supplement with another tuning suite or have someone patch your tune file for you.

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Thanks for your input!

I have tried to mimic the exact same setup, tune (just added theB9904 patch) and wiring as the donor car (Camaro ZL1 2013), the car has two fans.
How come is that I need a patch, with a cax i guess? Now I got very confused :(
Do you have any more information to share?

The difference is the OS' are different. The ZL1 may be setup this way from GM, so it works with discrete fans.

Are you trying to do a 2 or 3 relay fan setup?
Was the donor ECM + OS using the same fan setup? If not, you need to access parameters and tables outside of what EFILive has mapped. These are available in competitors software or via a .cax if you find someone to define them.

Yes the stock Camaro ZL1 seems to have a two fan setup (and I got the fans to) as on the schematics (from alldata) I posted earlier.
I have replicated the schematics but with external relays.

It do click the relays when I do the tests in DVT, a little confusing results but still makes them click.

Its just the tune that dont pull them when I cook the sensor.
Maybe its just that the engine needs to be started first (to activate the function) and then reaching the temp?

As I mentioned initially, you cannot make this happen with EFILive alone and will need to use other software or find someone to define the necessary parameters for you in a .cax file for your OS.

Quote:

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Originally Posted by ScarabEpic22

As I mentioned initially, you cannot make this happen with EFILive alone and will need to use other software or find someone to define the necessary parameters for you in a .cax file for your OS.

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Sorry for beeing hard headed but I am really interested in why this setup will not work when I have done the exact same wiring as on the stock Camaro ZL1?

On a prior build I had a Corvette tune E38 combined with discrete fans and then I got help from @LastCall with a cax file to get it working.
Now I am on a E67 so I cant compare the bin files and figure it out by myself.

EFILive should really get this thing sorted out with the fans setups. I cant imagine how many hours users have put into this problem!

can you post your cal and your fan setup?

This is a little late, but.... maybe i can help.

Quote:

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Originally Posted by Highlander

can you post your cal and your fan setup?

This is a little late, but.... maybe i can help.

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You are not late, I am late with the project :)

I attach the cal file that I have modified to be used in the Impala.

Very appreciated if you could have a look!