3500 Throttle Body Pinout

[TurboProject]

Does anyone happen to have a manual detailing the pinout on the electronic throttle body for the 3500? As in what wires are what? I'm going to assume 3 are for the TPS built in, but what are the other 10 for?

The colors are:
Top row: tan, purple, light blue, brown, white, tan, black/white
Bottom row: dark blue, brown, white/black, orange/black, black/white, pink/black

Anyone have any deatils on how it's wired up? Does it all go stright to the 3500 ECM? Or does some of it pass through another control module?

[TurboProject]

No one has a 3500 manual that shows the pinout and which wires connect to the ECM? Are the haynes manuals not out yet for 3500 cars?

[Joseph Upson]

It's no longer available in the download section. Check your moustang email box.

[bszopi]

Search, young one...



Just an FYI... Goto Autozone.com > Repair Info > Vehicle Repair Guides and you can find all sorts of goodies.

[bszopi]

It's no longer available in the download section. Check your moustang email box.

Thanks for that tip. I need to figure out why the link to the file isn't working...

[ForcedFirebird]

It's no longer available in the download section. Check your moustang email box.

I know it, what's that all about haha.

[Joseph Upson]

I know it, what's that all about haha.

The mustang shot, I thought I'd take that jab upon finding his personal e-address to send the file.

[TurboProject]

whoe...awesome. Thanks, you guys!

So...it's a little more intense than I thought it might be. I was reading this write-up:

http://www.picotech.com/auto/applications/electronic_throttle_control.html

So I was figuring it had a TPS sensor(which I can see molded into the plastic housing of the throttle body) and figured 3 wires went to that, and then since the motor is a servo motor and most servo motors have 3 wires I figured another 3 from that...but that's only 6 wires and this thing has 13.

But now I see...the pedal connects its two position sensors directly to it and the control module figures out its own stuff. And I guess it also has a built-in cruise control hince the speedo signal and the brake light signal? Or maybe that's something different and it just behaves differently depending on these signals...IE closes throttle body if you go over the speed limiter, not sure why it would do anything different with the brakes on...you think you could still rev the engine if in neutral with the brakes on.

As for the serial connection...I guess that's something for the CAN interface(controller-area network)? And maybe it reports the built in TPS signal through that? Because I don't see any other lines that go to the PCM for the TPS signal. Maybe it just uses it internally for controlling the throttle plate?

[Joseph Upson]

Yeah, most of us tossed the idea of trying to figure it out a long time ago realizing it's an impossible piece of equipment unless you install the matching ECM and gas pedal, and dash gauges and probable BCM and etc...

[TurboProject]

The mustang shot, I thought I'd take that jab upon finding his personal e-address to send the file.

Yea...I list my email on my old website...it's the one I don't mind all the junk going to.
But in this case it wasn't junk!

[TurboProject]

Yeah, most of us tossed the idea of trying to figure it out a long time ago realizing it's an impossible piece of equipment unless you install the matching ECM and gas pedal, and dash gauges and probable BCM and etc...

It looks like it could possibly work by itself with just the pedal attached? It might ignore not having the brake light signal and the VSS signal. But as far as the serial connection...that's pretty iffy. But just the pedal communication sounds like a good "limp-home" to me...and we know how GM likes their limp-homes.

Has anyone ever just tried putting power to the module, and hooking up a pedal?

[IsaacHayes]

You may want to contact the folks at gmtuners.com they put in a ls4 into a fiero and kept the stock ecm/DBW etc setup. Maybe they know if it can work or not stand alone.

[Joseph Upson]

Has anyone ever just tried putting power to the module, and hooking up a pedal?

Waiting on you to do that.

[TurboProject]

Waiting on you to do that.

Well I do have a pedal....except it's from a LS1 vette. I put an ohm meter on the pins on the pedal(there are 9 of them) and it seems to have 3 position sensor in it rather than the two that are shown in the 3500 diagram y'all got me.

Does anyone have a 3500 car that they could ohm out the pins on the pedal connector?

[TurboProject]

Well I played with it a little last night. If I apply power to it the throttle body closes all the way(when not powered it is open slightly). I played around a little with hooking it up to the vette pedal but nothing is happening so far.
Also when power is applied, 5v is put out on those two 5v reference lines as expected to power the position sensors in the pedal.

If it doesn't work the only other thing I can think of is that there's some kind of enable signal that comes in on those serial lines to make it work...

I'm also wondering if throttle responce is slowed if it's not detecting a speedo signal telling it that the car is moving...

Anyone with a stock 3500 car have any experience with bliping the throttle in park?