Old Geezer

iTrader: (3)

[Tried the search... got 1 response, of no value]

Am wiring the E40/tcm into an El Camino.[Stock harness modified by Speartech.]
The owner is using the 05 GTO auto shifter, and I need to find a signal, [either 12v, or neg], out of the PNP, [or?], to trigger a start relay. There is no BCM, etc, from the donor vehicle.

Also, there is a 2 wire plug, that terminates right at the ft end of the pass side inj harness run. The wires are green/yellow trace, and tan. My Alldata schematic says it's the IAT sensor. However, the MAF has the IAT sensor in it, and there are 5 wires in the plug. [1 wire appears to be down in the plug far enough that it won't make a connection.] I don't have the OEM inlet duct. Is the IAT separate, even tho the MAF is a 5 wire??

Now I know why the swap back to the LS1B system is so popular!!

NE help is appreciated!

MERRY CHRISTMAS!

big johhny

I just pulled an LS2 from a '05 GTO I bought wrecked a few days ago. the plug goes to the sensor on the vapor return, look at the picture. I believe it is the IAT.

Try this link for some wiring info:

http://www.ls2.com/forums/showthread...ghlight=wiring

Old Geezer

iTrader: (3)

Johnny, THANKS for the response. I book marked the LS2 link, and will make use of the info!

Merry Christmas!

big johhny

You too! Glad I could actually help someone else!

pdsq98gt

That is the EVAP purge solenoid.

Old Geezer

iTrader: (3)

I now remember taking the harness off, and unplugging this plug.
I wonder why the Alldata info shows the IAT as being separate from the MAF, when there's 5 wires in it, and a sensor bulb....

Guess it doesn't make any diff, I'll just use the MAF and see what I get on the EFILIVE scan for IAT.

Might you know what wire I can get into to use for a P/N signal??


TIA, for the help!

MERRY CHRISTMAS!

psiconversion

iTrader: (5)

Starter Relay control is C1 13, Park Neutral is C3 22 (wire should be grounded when the shifter is in park or neutral).

MAF should be 5 pin on all LS2 24X Applications.

Hope this helps.

Jon
PSI

Old Geezer

iTrader: (3)

Jon, thanks!

Old Geezer

iTrader: (3)

for the help!

Merry Christmas!

Old Geezer

iTrader: (3)

Pulling the C1 and C3 plugs.
There is no wire at # 13. At C3/22, there is a or/blk wire.

Hmnnn. I wonder if the person that modified the harness took the 13 wire out..
I find a yellow wire at the start relay...Should be run there from position 13/C1.

I was going to add the wire. However I have wire ends for the LS1B style PCM connectors, but they appear to be too big for the E40 pins..Correct or not??

On my 05 H2 trans set up, I ran a wire from pin 1 on the PNP switch, to a Bosch relay, ran the starter solenoid wires thru that. I think this may work.

MORE BS to deal with...Just checked the PNP plug.. Wires are no where near the color codes on the Alldata sheets..

Merry Christmas/Happy New Year all.....