Help me wire an IAT sensor.: Grassroots Motorsports forum: Grassroots Motorsports Magazine

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Nov. 23, 2010 1:34 p.m. dj New Reader

Hey Everybody,

I'll start with the forewarning I'm totally ignorant about electronic wiring...

I've been getting low mpg for awhile and I finally realized the IAT sensor was never properly crimped and wired in so wires have been sitting loose, "plugged in" for some time.

I tried taking the connector around to Advanced Auto only to have some mongaloid say he knows how to remove it and then proceed to destroy one crimp with a screwdriver. There are only two wires, Red/Green and Red/White so I don't know which goes where ( connector marked A on the left and B on the right).

This is the crimped side and this side goes to the sensor.

Does anyone know what kind of metal crimp these are and where to buy them? How are they removed from this plastic connector? How do I know which wire is what?

Thanks in advance for any help possible!
Nov. 23, 2010 1:40 p.m. Ranger50 Reader

It is a GM connector, buy another and use the weather-tight butt connectors included in the package. It might be $30 for a connector, but that is the easiest solution.

Brian
Nov. 23, 2010 1:43 p.m. dj New Reader

Ranger50 wrote:

It is a GM connector, buy another and use the weather-tight butt connectors included in the package. It might be $30 for a connector, but that is the easiest solution.

Brian

You mean the whole plastic connector and crimps is a gm connector? I can get this from an autoparts store asking for a 'gm connector'? Sorry but as mentioned I don't know electronic wiring/connectors well at all...
Nov. 23, 2010 1:50 p.m. Ranger50 Reader

I would try the dealer and ask for a Intake air temp sensor connector for your given vehicle. Dealer maybe more expensive, but they know if you can get one or not. They can also provide the correct wire orientation.

Looks like a standard GM/Delphi connector.
Nov. 23, 2010 1:50 p.m. Ranger50 Reader

BTW, pulling connector pins sucks ass. BTDT.
Nov. 23, 2010 1:58 p.m. dj New Reader

This is on my lexus converted to MAP so I can't ask for sensors my car didn't come with, any ideas?
Nov. 23, 2010 2:08 p.m. Wonkothesane Reader

Dj - Advance or places like it will have those connectors in stock. When you give up trying to explain that you know it's a 96+ GM connector, just say something like, "It's a 2005 Chevy Cobalt. Yes, it has an engine. Yes, it might be that one." Have them pull the part for you and compare. Try the next chevy of appropriate vintage you can think of :) I used a water & air temp sensor from a 99 cavalier (In their systems) if I recall.
Nov. 23, 2010 2:17 p.m. dj New Reader

So I should go in asking for a 96 and up GM connector? There's no other word for this, just connector?
Nov. 23, 2010 2:20 p.m. MadScientistMatt Dork

They're a Delphi GT connector, and you can find multiple part numbers for it at this link:

http://www.megamanual.com/v22manual/mwire.htm#clt

Scroll down a little ways to the green and blue boxes.

IAT sensors don't have a polarity - one wire goes to the ECU and the other to ground, and it doesn't really matter which is which.
Nov. 23, 2010 2:30 p.m. dj New Reader

MadScientistMatt wrote:

They're a Delphi GT connector, and you can find multiple part numbers for it at this link:

http://www.megamanual.com/v22manual/mwire.htm#clt

Scroll down a little ways to the green and blue boxes.

IAT sensors don't have a polarity - one wire goes to the ECU and the other to ground, and it doesn't really matter which is which.

So it plugs in either way? If so, that's some good news!
Nov. 23, 2010 2:35 p.m. EvanB Dork

The GM part# for that connector is 22690892. List cost is $49.59.
Nov. 23, 2010 2:43 p.m. Pumpkin Escobar SuperDork

you could always just get those covered quick disconnect terminals
Nov. 23, 2010 3:30 p.m. kb58 Reader

To be really cheap, just solder wires directly to the sensor and be done with it, adding some silicon seal for weather. Getto but it'll work fine. If you ever have to remove the wiring, just remove the connect, too.
Nov. 23, 2010 4:13 p.m. Sofa King Reader

Find one the same in a junk yard, cut it off and leave a couple inches of extra wire and solder your existing wires to the stubs that you left on the Junk yard connector.
Nov. 23, 2010 4:38 p.m. dj New Reader

Found it at NAPA from that link Matt gave me, Thanks!

Napa PN# TSC300 - $18

Comes with the wires and everything but I have to wait till tomorrow to get it sent to my local store. You guys are awesome, thanks for the help!