infernosg's S5 N/A Build

C. Ludwig · 10-14-2013, 03:35 AM

A - ECU signal
B - signal ground (rotor housing)
C - signal ground (rotor housing)
D - primary ground (battery negative)
E - primary power (battery positive)

Pin B is the one that's not real important. The AEM instructions say ECU signal ground, but the rotor housing is fine. It's primary use is for OE mis-fire detection, which we obviously aren't using.

I do wire the Haltech as their instructions say. Power ground to the chassis and signal ground to the battery.

10-14-2013, 03:35 AM	#35
C. Ludwig Rotary Masochist Join Date: May 2008 Location: Floyds Knobs, IN Posts: 494 Rep Power: 18	A - ECU signal B - signal ground (rotor housing) C - signal ground (rotor housing) D - primary ground (battery negative) E - primary power (battery positive) Pin B is the one that's not real important. The AEM instructions say ECU signal ground, but the rotor housing is fine. It's primary use is for OE mis-fire detection, which we obviously aren't using. I do wire the Haltech as their instructions say. Power ground to the chassis and signal ground to the battery. __________________ _______________________________________________ *One stop Haltech, AEM, Syvecs shopping. Installation and tuning.* http://www.lms-efi.com *Free support. Drop us an email.* chris@lms-efi.com 502-515-7482 Facebook @LMS-EFI