PWM cooling fan(s) control using ECM

[flyingv]

For any of you with an E67 from an 09' vehicle, here is what changes I made to finally get the C7 PWM fan to work.

1. I changed the OS from 09' CTS-V to an 09' ZR1

I did confirm through a document on the EFI Live forum that the 2 OS's are compatible.

*no matter what i did with the CTS-V calibration, I could not get a output signal from X3-49*

2. I changed fan settings to PWM Electric 100hz

*PWM EV 100hz did not work per the C7 calibration*

3. Fan State vs. Desired (all zeroes)

4. Output State vs. Control (all 1's)

5. Wired in AC pressure sensor @ X3-21, X3-57, & X3-37

Viola! PWM fan control works in the scanner!

[andrewb70]

Originally Posted by flyingv

For any of you with an E67 from an 09' vehicle, here is what changes I made to finally get the C7 PWM fan to work.

1. I changed the OS from 09' CTS-V to an 09' ZR1

I did confirm through a document on the EFI Live forum that the 2 OS's are compatible.

*no matter what i did with the CTS-V calibration, I could not get a output signal from X3-49*

2. I changed fan settings to PWM Electric 128hz

*PWM EV 100hz did not work per the C7 calibration*

3. Fan State vs. Desired (all zeroes)

4. Output State vs. Control (all 1's)

5. Wired in AC pressure sensor @ X3-21, X3-57, & X3-37

Viola! PWM fan control works in the scanner!

Good information. Nicely done.

Andrew

[samckitt]

Originally Posted by flyingv

For any of you with an E67 from an 09' vehicle, here is what changes I made to finally get the C7 PWM fan to work.

1. I changed the OS from 09' CTS-V to an 09' ZR1

I did confirm through a document on the EFI Live forum that the 2 OS's are compatible.

*no matter what i did with the CTS-V calibration, I could not get a output signal from X3-49*

2. I changed fan settings to PWM Electric 100hz

*PWM EV 100hz did not work per the C7 calibration*

3. Fan State vs. Desired (all zeroes)

4. Output State vs. Control (all 1's)

5. Wired in AC pressure sensor @ X3-21, X3-57, & X3-37

Viola! PWM fan control works in the scanner!

Did you use EFI Live or HPTuners to change the OS?
Will it work without the AC pressure sensor or is that required?
Thx