OutToWinPAHC

iTrader: (10)

Its been a while since I did the wiring on my swap and I have a MAF sensor problem. MAF voltage low, doesn't change from 405mV. The only problem is the wiring is nice and loomed up and a PITA to cut the loom. I want to check continuity to the ECM but I dont know what pins on which J the three wire connect to. I found the schematics, but they don't have the pin designators for the ECM.

The engine is a 2002 LS1 from a WS6, and I want to get this fixed before I send it out to rapid motor sports for a performance build and tuning.

Please help if you can (2002 ECM, 3 wire MAF red, black yellow)

LS1MCSS

iTrader: (18)

Search for 99-02 schematics. I posted them a about a month back.

Edit: Found them for you.
https://ls1tech.com/forums/conversions-swaps/936409-99-02-schematics.html

OutToWinPAHC

iTrader: (10)

I was looking at them about 8 of the 12 and I saw no pin numbers I'll check again though

OutToWinPAHC

iTrader: (10)

Ok I see the print, I see my black is ground which is a given, ill check that, I see the pink is my fused +12 ignition voltage, and the yellow is my signal unfused to the ECM. My guess is a loss of power to be seeing .4V instead of up to +5V. The print shows signal as 31 C2 .35Yel 492. What is that there? My guess is connectors two (J2) pin 31?

Most likely I have a loss of 12V or ground that I need to check. Then its off for 37# injectors, ported LS6 243 heads, LS7 lifters and trays, pushrods, ported oil pump, and a Texas Racing Magic Stick 3 cam.

But if you can help me figure out what pin the signal returns to I would appreciate it.

LS1MCSS

iTrader: (18)

Yellow is the signal wire. Make sure you have 12V, at the pink wire, with the ignition on and also make sure you have a good ground.