C101 Pinout needed for 1998 S10. What is Pin E & H ?

I am swapping a 2002 Tahoe 4.8 in my 1998 Sonoma 2.2L/Auto. I have gone through all of the wires and I think I have figured almost all of them. 1998 Sonoma/S10 did not use the C101 with 16-pins. It used 10 pin C101 and also 8 pin C120.

I need to connect Tahoe's C100, Pin E & M to 1998 S10/Sonoma's C101 Pin E & H. Looking at the C101 connector, Pin E has EGR Solenoid Feed on female side and VSS on the male side.  Also Pin H has EGR Vent Solenoid on female side and Serial Data on the male side

Can someone please clarify this ?




Thanks

Waid

Looks like you found a glitch in the service manual.  I'm looking at 1998 and seeing the same thing, but also seeing some conflict between C101 being a 4.3 and or 2.2l connector.

The number on that chart is 12177081, which looks like this


What does your C101 look like?

I also found this connector for a 4.3V6 and it shows EGR for both Pin E & H.
 

This is what I have:

I don't remember all of my decision making process, but this is how i ended up planning my harness.
top is the engine harness side, bottom is the body side, which is stock to a 2004 blazer.

Unfortunately, the 1998 and maybe 1997 S10 used a different C101!

Waid

I pulled and sold the 2.2L yesterday and the old wire harness intact and out.

I traced Pin H (710) on C101 to PCM C1-58 Serial Data Class 2.

I traced Pin E (420) on C101 to PCM C1-35 TCC Brake Switch Input.

The TCC Brake Switch Input on Tahoe's is PCM C1-33!



Last two pins I need to figure out yet. What are they for and where do they go in S10?

Tahoe C100 Pin N - Ignition 3 Voltage. What is this for?
Tahoe C2 Pin A3 - AC High Pressure Re-circulation Switch Signal.

Thanks

Waid

Did you figure this out yet?

Other than using it for tracing/double checking circuits I'd forget about how the 2.2 engine harness is wired and focus on the 4.8.  Definitely leave circuit 420 hooked up to PCM - C1 (33) and tie it to the S10 C101 (E)

Some of the C101 confusion comes from the fact that somewhere between 98 and 2000 they switched from the 10 pin to the 16 pin on the 2.2 and eventually on the 4.3 as well halfway through 2002. The factory schematics and end views do have a few errors that I've run into before.


C100 (N) provides Ignition power to the 4WD system. Both the Blazer and the full size truck use circuit 241 off each of their 4WD fuses. If you don't have 4WD don't worry about it.

UBEC - C2 (A3) feeds PCM - C2 pin 11 the AC High Pressure Re-Circulation Switch Signal with the full size truck A/C wiring. On the FST that switch appears to be wired into either the chassis or forward lamp harness and passes back to the PCM through the fuse block.

If you haven't found these resources already I use them in a pinch when the files I saved from the factory service manuals aren't complete

http://www.lt1swap.com/2000harness.htm

Wiring Diagrams and Repair Info - 1999 Silverado should be pretty close to your 2002. 2003 they started using drive by wire for the throttle.