ekim952522000

Hi guys my car has a IAC code 10 CEL. So I got to looking at my car and relized I never wired up the IAC sensor could some tell me how?

Here is a picture the the harness is a ex harness I am converting back to OBD1 using a hondata s300.

I'm going racing this weekend and would like to get this work out any help would really be appreciated.

2fast4u831

IAC valve is in the back behind the intake manifold, right under the vacuum hose in the pic. Check and see if its plugged in or not. you racing in sonoma?

ekim952522000

I thought the IAC sensor was the sensor on top of the intake manifold off the right in the picture?

And the EX harness wires for it are on the left and somehow they need to be wired together?

But I am not sure?

2fast4u831

I dont think you need it if you are converting back to obd-1 since that sensor is not used.

ekim952522000

hmmmm...I wonder why it pulls that CEL then?

2fast4u831

I found it! CEL #10 is for the (IAT) intake air temperature sensor. it is either on the runner of the intake manifold or behind the intake manifold. Check and make sure it is plugged in

ekim952522000

That was what Im saying there is one plugged in on the intake manifold but I think the wires that go to it are on the left in the picture so somehow I have to wire the 2 together?

2fast4u831

according to my book. the wires for the IAT sensor are green/white and red/yellow. Dont know if you need to wire them together or not. What color are the wires currently connected on the IAT sensor? what ecu are you using right now?

ekim952522000

THe green/white and red/yellow are hangin on the lefyt right next to the throttle body you cann see them in the picture. the one connected to the IAC is red/yellow and there is a black one that is not connected to anything you can see them on the right in the picture.

I think it's a p28 with a hondata s300 from king motorosports.

2fast4u831

so the plug connected to the IAT is red/yellow and black? or is it 2 seperate plugs?

2fast4u831

OK, this is what I found. The IAT sensor on newer cars is on the intake tube. #23 in the pic below. You can depin the wires from the plug and swap them out with the correct plug for the IAT. Im positive that the plug for the IAT you have connected right now is wrong. green/white goes next to the clip. red/yellow goes opposite to the clip. <--this is for the plug currently in the IAT

ekim952522000

Typo in my picture that should say IAT sorry

There is one wire coming out of the IAT it is red/blue
there are 2 wires goin right to the IAT one is red/yellow and is connected to the red/blue one and there is a black and yellow one that is cut and not connected to anything.

the wires on the left are red/yellow and green/black

ekim952522000

Thanks for all your help I will disconnst the one I have hooked up to the IAT sensor now and pin in the new ones my question is now since there is only a red/blue wire coming out of the IAT sensor di I connect the red/yellow one to it or the green/black one or both?

2fast4u831

connect both the red/yellow and green/white to the plug currently in the IAT sensor.
here's a pic I took from my engine. green/white should be next to clip. red/yellow should be opposite of clip. I dont know where the current wires go to. but I can help you out was your car running like crap?

ekim952522000

car was not really running that bad?

Your sensor has two wires mine only has a red and a blue here is a pic of how it is now. (I agree that you are right and that this is hooked up wrong but see how I only have 1 wire coming out?)


SWo which of these 2 do I wire to the red/blue one in the above picture or do I wire both?


Also mine is green/black not green/white?

2fast4u831

so it's green/black and red/yellow? it kinda looks like there's only 1 wire and the other was cut off...? take the IAT sensor plug off and see if there are 2 pins sticking out(which there usually is) but yes, you need to get the right plug and wire the 2 wires into the IAT sensor

ekim952522000

Yeah there was 2 pins under the sensor I can I order a GSR plug from acura will that work?

2fast4u831

you don't have an extra harness laying around? I have many of those plugs if you want one. acura/honda should have it.