PFF - Pennock's Fiero Forum, PDA Edition

Firebird BCM working! (Page 5/10)

fieroluke

FEB 24, 12:23 PM

No, DashScan only works with the stock ECM.

But I have a 7730 on my stack of things to do, prolly this summer. Then my DashScan will be obsolete, and I'll have to engineer some replacement. Of course I'll post on Pennocks when I'm done.

Best regards

Oliver

lou_dias

FEB 24, 12:49 PM

quote

Originally posted by fieroluke:

No, DashScan only works with the stock ECM.

But I have a 7730 on my stack of things to do, prolly this summer. Then my DashScan will be obsolete, and I'll have to engineer some replacement. Of course I'll post on Pennocks when I'm done.

Best regards
Oliver

That would be great. I was able to plug in my laptop using a cable from ALDLcable.com, TunerPro RT software and downloaded a generic .ads file for the '7730 ECM and was able to pop up a window displaying my live TPS voltage so it probably shouldn't take you too long to get that figured out. I think with the '7730, you send a request then receive the reply vs. the constant stream offered by the stock Fiero ECM that was meant for the RALLY display.

[This message has been edited by lou_dias (edited 02-24-2011).]

infinitewill

FEB 24, 12:58 PM

[This message has been edited by infinitewill (edited 01-01-2016).]

fieroluke

FEB 24, 02:14 PM

I know the 7730 data stream, but DashScan is not capable of decoding it - the DS CPU only has a single UART, which is already used for the display unit. A second UART (serial port) would b required to interface to the 7730 data stream. This is why I had added the coprocessor for mileage decoding - but it is too slow for the 7730.

No matter how you look at it, DS is not up for the job, which is why I am working on an alternative. It's a completely different approach, I already have a set of circuit boards for the prototype (there will be three boards: supply, CPU and display). The boards are sandwiched, and I'm in the process of populating the boards section by section. Maybe I'll find some time tonight to put the display on the board (which is a bit risky, if anything goes wrong, I'll fry the $50 display). Wish me luck!

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Visit my website: www.fieros.de for lots of technical and other Fiero related information
Maroon 87 GT daily driver with Firebird Body Control Module, Power Window Controllers and Dash mounted Scantool/Trip Computer

fieroluke

FEB 24, 02:25 PM

Some additional info on the fobs: I bought new ones on eBay for $35 each from Midwest keyless. Fast delivery. The Firebird fobs seem to come with pictograms for locks, horn and trunk, while the Camaro fobs show the words "lock", "unlock" and "rear 2x". Horn is still a pictogram. Buying a pair of each is handy if you have two Fieros with the BCM upgrade - easy to tell the remotes apart.

As for programming: Ignition off, then remove the radio fuse. Turn ignition on three times within 5 seconds.If the BCM unlocks the doors, you are in programming mode. Now press and hold both lock and unlock buttons on the remote for 15 seconds. The BCM will lock and then unlock the doors if the remote ha been learned. Repeat this for up to four transmitters total. Finally turn off ignition and reinstall radio fuse: that's all!

fieroluke

AUG 03, 04:30 PM

Another update on my Firebird BCM upgrade:

I just finished the upgrade on another car, and this time I also wired up the shock sensor - feeding the required wires through the bulkhead connector's unused terminals. This resulted in a completely stock look. Check out the picture at www.fieros.de/en/articles/BCM.html

Also, I found out what the undocumented pin does on the green connector: it's an antenna input! With this knowledge I was able to significantly extend the range of the remote receiver with a simple piece of wire!

TG oreiF 8891

AUG 17, 11:32 AM

Awesome. I just purchased a module on ebay. I'll need several other tools and parts, and most importantly I need to recruit my electronics guru friend to lend a hand. I have a few questions (I'm an electronics idiot).

Is there any difference between the UPL and KUB coded modules?

What exactly does the term, "isolate" mean as used in these directions? I see it used often as, isolate the splice.

Am I correct to assume that the trunk release button on the dash will no longer work after the modifications listed under the Trunk Release section? Is there a way to make it functional as well as the BCM trunk release functions?

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1988 Fiero GT
Custom Corvette / MR2 electro-hydraulic power steering
17" rims covering up 11.25" rotors with Cadillac Calipers & drop spindles

fieroluke

AUG 17, 04:32 PM

Hi there,

I've done the mod three times so far, always using the UPL coded modules, which work. The other codes I list in the article are described as I researched them to the best of my knowledge.

Isolate means putting something like tape around the conductive (metal) parts. But if you don't know that, you should really get someone to help you with this upgrade.

The trunk release button will work just like it did before, you won't lose any functionality! On the contrary, you'll be able to unlock the trunk using a remote key fob.

One final note: please don't use the old copy of my article that was copied into another thread, because I keep improving the article constantly each time I do the upgrade or get additional information. Please use the up to date version on my website!

JumpStart

AUG 17, 06:07 PM

Great work! From what I have read, The BCM will not work with any other ECM other than the stock Fieros? I have a 3800 with the OBD2 ECM.

Steve

fieroluke

AUG 18, 04:51 AM

Hi,

no, the Firebird/Camaro BCM will work with ALL ECMs/PCMs, stock or non-stock, L4, V6, V8 or even Fred Flintstone propulsion Fieros (hole in floorpan)!

The BCM does not use any feature of the Fiero ECM at all, they are not even connected.

On the contrary, if you do swap in a newer PCM that requires a VATS (Passkey) signal, the BCM generates that signal for you. I have not tried that though, but if you use a non-Fiero ECM/PCM from 98-02, they should be compatible.