According to the picture I have drawn below, does anyone know which pins are the analog 1 and 2 inputs? Thanks!

 

 

Yes i have seen that, that is what i used to wire my wideband for datalogging my x3 and ended up messing up my x3. Fortunately they fixed it under warranty.

By the diagram you have posted, i attached my 0-5v output wire from the AEM gauge to pin 5, and grounded pin 6. This resulted in screwing up my x3 twice! Im not up for a third time.

 

Double post..

The diagram you have posted, is that looking into the end of the plug?

 

That's looking INTO the Male end of the cable.

Yer hand-drawn pinout is wrong.

More on the VMP forum thread where that diagram is from; grounding, the correct analog formula, etc.

You also need to measure and correct for any ground offsets, however slight, as that WILL skew the results. That's covered on Innovate's site - Application Notes section.

MGD

 

Yes my hand drawn pinout was not meant to be a correct drawing. According to MY picture, which pin number is the analog inputs?

It should be MY pin 1 for analog 2 and pin 2 for analog 1 right...

 

This is the thread i followed for the install. I have the AEM wideband, scroll down and you will see the diagram.
http://www.vmptuning.com/forum/showthread.php?t=78

i connected the white wire to pin 5 of your firewire diagram, and grounded pin 6 of the firewire diagram. This resulted in my X3 being toasted and had to be fixed by sct. I then removed the wiring, and followed the procedure again, with the same results of toasting the x3.

Whats the deal here?? I dont see where i went wrong. Im pretty good with wiring too so..

 

Dunno what to tell you.

There is nothing other than applying an overvoltage to the X3 inputs that's going to hurt it - analog in's are high-impedance signal inputs. Similarly, other than the +/-15v serial data stream output (blue wire), there is nothing on the wideband that is going to hurt the X3. Opens or shorts on the analog inputs will no cause harm. Shorting pin 1 on the X3, however, WILL bugger it up.

Have you independently confirmed that the widband is outputting 0-5 vdc while operating in the exhaust stream? (NOT connected to the X3)

Are all the grounds connected together at a single point to a known good chassis ground? Is the widband being fed the correct +12dc on the Red lead? and that the wideband is powered on after it's conected to the X3?

For the 1394 cable you are using have you confirmed by continuity testing that the wire you are using is actually connected to the correct pins on the male end?

Have you contacted AEM and SCT support and discussed any of this with them? Depending upon the results of the above checks, you may have a faulty wideband or cable, a connection mismatch issue, or SCT has altered the pinouts for the 3015 for some inexplicable reason.

Just a SWAG - from information provided to-date.

MGD

 

I will take what you have posted and run with this for today. I have done a few of the above, but will go through everything again and post back more precise details.

Thanks!

 

I again checked the white wire which is the 0-5v output from the wideband, at idle showed a pretty steady 2.5-2.6v. This was done while not connected to the x3 using my Fluke voltmeter.

All of the grounds do use the same ground, which I have running to the battery post itself. I checked continuity to ensure it was being grounded, all good.

Yes the wideband is being fed the correct 12v, verified using my Fluke.

For the firewire cable I am using, I have verified the analog input I was using to be pin 5, and the analog ground is pin 6. Those pin numbers are according to this diagram..
Guess the next step is to start calling SCT and AEM

 

I can use my x3 and datalog all day long with it, but plug in the wideband and it goes to a blank blue screen shortly after and will not function anymore.

 

Can anyone verify if there should be continuity between pin 1 and pin 2 on the firewire?

I am getting continuity by touching those two pins, pin 1 is a five volt output and pin 2 is the ground. I didnt think I should be picking up continuity across them. This essentially means the 5 volt output from pin 1 on the x3 is being fed right back in at pin 2, right? Im trying to figure out if my cable is bad.

 

no

so yer not using an sct cable

sct FireWire does NOT conform to the fw std !

its just using a convenient connector (small)

that is yer problem

 

I was using a firewire cable from a local computer store, I had no idea there was a difference?

At least I may now what the problem is now! Thanks MGD!

 

Ok.

I f'd up.

Here's the standard FW pinout (about halfway down the page) http://www.buildmyowncabin.com/elect...e-pinouts.html

So - apart from the voltage spec, the 2 analogs are twisted-pairs.

Looks like the pinouts are the same.

And confirmed - there should be NO continuity between 1&2 on the cable side. I did at least check on of my cables, lol.

Yer cable has either an internal loopback in the shell (unlikely), or is faulty (my guess).

Sorry - next time I'll check BEFORE I start drankin'.

Try another cable and check it before you buy/try.


MGD