E92 ECM - cant get fans to turn on.

Having issues getting my fans to turn on. Even with the VCM Scanner I cant command the fans to turn on. Any suggestions? Posted my tune file below.

THANKS

Attachment 87610

Have you ruled out a mechanical issue such as a blown fuse, relay or fan motor?

Checked the fuse which was good. Switched the relays with new ones still not working. Doesn't seem that the ECM is grounding the trigger wires when I try to command them on with the scanner.

If the scanner won't make them come on, then I wouldn't think the issue is not with the tune, but rather a mechanical or electrical issue.

On gen v the fans are PWM. Most of the time hptuners wont be able to control the fan in the scanner. Sometimes it does work on the 5.3 OS. Are you trying to drive a relay?

You have the fan type selected for discreet. This should be PWM EV I believe, atleast my 6gen is that way.

Dont think anyone's gotten the e92 ecu to control relays. The gm gen 5 swap kit has a calibration that uses the relays.. if you could find the calibration file and try it. Fan control works on my swap with vcm controls (pwm)

Usually the 5.3 os will let control speed via the scanner. The 6.2 OS doesn’t allow the scanner to control speed. I have seen guys set the pwm freq to 1200 hertz to make a relay stay latched.