LS6 idling high

[Section8]

I emailed my PCM tuner and he told me to make sure i had done the IAC setup properly. This requires a scan tool which i don't have

"TPS voltage at the PCM (must check with scan tool) has to be under .600 VDC as well at closed throttle and the TPS must read 0.00% ALWAYS (not 0.8% or more; many scan tools will not show the decimal place though).

The worksheet that came back with the TB setup goes over things. If you had used it and a tool to setup the TB you would surely see zero IAC counts (it's fully closed trying to limit idle speed but is unable to). That IAC range specified HAS to be setup, that's why I send the sheet out. Assuming it was attempted, then it only leaves a giant leak, incorrect arm, etc as the culprit. "

So I started by testing voltage to the maf and tps wires, all looked good - so i cleaned out the TB and IAC and opened the idle screw some. No change. Opened a bit more. No change. I cranked it all the way, no change. Closed it back down, no change. (i was resetting TPS each time)



Then my brother called and he walked me through some electrical tests - specifically current and resistance. I'm seeing some odd stuff on the resistance to one of the wires on the maf connector. on DC it reads 11V, but on 2000ohm resistance test my meter is beeping and telling me 005. My brother says that is an indicator of a ground short. Other wires show normal resistance on that harness connector.

SOoooo, I need to pull up an LSx wiring harness schematic and figure out which of these MAF connector wires does what, and what current should be going through it, but i'm thinking I have a ground short somewhere on the harness.