Thats what that bypass harness test did... Its not the harness!

 

Oh ok. I know nothing about the AEM F/IC.lol

 

Checking in to see what the solution is.

 

I'm not sure what the bypas is either, and I have the F/IC

 

Ok. Now that we have ruled out the issue possbly with wiring, I think it has to do with the FIC. I will correspond back to AEM bout this on Mon

 

Any update on this!
(as I am getting ready to throw the aem fic out the sunroof going 100mph on the freeway!) haha jk

 

I put another email into my buddy over at AEM

 

Response from AEM:

Just to clear things up….



The DBW unit in the engine bay “hums” with the key OFF ?



What about with the key ON?



Does the car still function normally even with the “hum”?





Now, remove Pin 6 from the 22pin plug at the FIC which is the TPS input wire. See if the “hum” continues.



Please make sure all the questions above are answered so we can move forward. This is a very strange issue that I’ve never seen before but obviously if the DBW is making noise that means its getting power or ground from somewhere.

 

The noise is a standard noise that is on every Scion tC. It happens when you turn the car to the "ON" posistion on the ignition. Then you turn the car off and it shuts off. Only mine does not.

So yes it does it with the key ON.

As far as I know the car still functions normally even with the "hum of the throttle body" except for the fact that it kills my battery.

And where do I find pin 6 from plug 22 and how do I remove it without breaking or screwing up my nice plug n' play harness?

 

There are 2 connectors on the AEM FIC, one 22 pin harness and one 24. The number of the pins is located on the top left of the harness connector. You will see a "22" or "24" there. Obviously, 22 is what is needed.

Pin 6 is located on the bottom row of the 22 pin connector, counting from the right, 6 spots going left. It appears smack dab in the middle of the harness (with the little clip/prong that on the top) in the bottom row looking at the wire side of the cable connector.

 

i have the same problem.... buzzzzzzz

 

Check your turbo thread you made earlier. I responded to it.

I will be making a suppliment kit to fix the problem. All auto tCs will have this issue with the FIC. It's a quick and inexpensive fix I will release next week. You and browndogg will receive the kit for free.

 

thank you so much joe !!!!!

 

Thanks For making a kit, I asked this question a while ago about the F/IC on automatics with the wiring harness and people said there was no issues......

 

I cant wait to get this fix! I hate having to unplug my fic everytime i shut off the car

Joe... You da man!

 

you could just put a relay to the power wire on the f/ic so it only comes on when the ignition was on. that is what I would do

 

Yes Joe the quirky scientist!

Also, AEM said we could realisitcally just remove the TPS wire, but the FIC would not log TPS at all and see it. In all, that is an easy fix and considering all of the tuning is done via boost pressure, it will work.

 

Once he pulls the tps wire, the car wont start.

 

joe im just wondering when this will be shipped out. my fingers are getting tired from unplugging the aem everytime i shut the car off lol

 

Then WTH was Henry @ AEM talking about: