New scan tool for all OBD-I subarus

THAWA · Post by **THAWA** » Tue May 16, 2006 7:10 am

http://www.vwrx.com/selectmonitor/index.html

Peep that out. It's like Vikash's tool, but with analog display and multiple displays at a time. As he noted, and Vikash has said many a time, the less variables shown the faster it will update. I need to buy a good laptop and test this bitch.

Original site:

http://www.vwrx.com/

This is probably the best thing that has come from those VW guys in a while.

Splinter · Post by **Splinter** » Tue May 16, 2006 9:19 am

that and the fact that it RUNS IN FREAKING WINDOWS

omg.

I need an ECU with a working diagnostic port ASAP.

mikec · Post by **mikec** » Tue May 16, 2006 12:56 pm

I saw this too... Waiting on a MAX232 sample so I can build the adaptor they mention.

vrg3 · Post by **vrg3** » Tue May 16, 2006 3:18 pm

Neat. I kinda wish he'd mentioned my scantool on the page (especially since he's asking for donations) though. The ROM ID information (resaearched by me) was copied out of my code, the image of the connector (created by me) was taken from the last version of my scantool's web page, much of the INI file is based on my research as well, and some the comments were actually lifted straight out of the comments in my code.

Oh well.

Actually, I think some of the stuff copied from my stuff won't work. I don't see transfer function specifications in the INI file, and they're not the same for some earlier ECUs.

Mike - If you're impatient, on many computers, you can actually get away with using a 1489 to shift levels instead, and those are carried by many Radio Shacks.

Post by **Legacy777** » Tue May 16, 2006 6:11 pm

Vikash,

Email him, and tell him you would like credit.

vrg3 · Post by **vrg3** » Tue May 16, 2006 6:26 pm

Yeah, I guess I will...

Project_Legacy · Post by **Project_Legacy** » Tue May 16, 2006 7:02 pm

yea, that would be seriously messed up if you didnt get any credit! (and donations for that matter!

)

mikec · Post by **mikec** » Wed May 17, 2006 12:37 am

Cool Vikash. I'll keep that in mind if I decide I really want to give it a go, and the sample hasn't shown up yet.

scuzzy · Post by **scuzzy** » Wed May 17, 2006 1:44 am

vrg3 wrote:Yeah, I guess I will...

I would insist on it.

3800+ lines of assembler isn't any easy task.

THAWA · Post by **THAWA** » Wed May 17, 2006 2:00 am

Yeah you should.

THAWA · Post by **THAWA** » Wed May 17, 2006 8:12 am

Looks like he's at least given credit to the romid finders.

scuzzy · Post by **scuzzy** » Wed May 17, 2006 10:47 pm

Here's a question...

Isn't Vikash's serial cable a basic and roughly accurate TTL to RS232 translator? In essense, it would work, right?

something I will have to try this evening...

Splinter · Post by **Splinter** » Wed May 17, 2006 11:24 pm

Yea I'd like to use Vikash's cable if possible, theirs looks way more complex

THAWA · Post by **THAWA** » Thu May 18, 2006 2:20 am

I wonder if you used a DB9 to USB adapter and spliced the wires to the select monitor connector if that would work.

Or for that matter, if you could just use a USB cable and splice to the select monitor.

scuzzy · Post by **scuzzy** » Thu May 18, 2006 6:36 pm

THAWA wrote:I wonder if you used a DB9 to USB adapter and spliced the wires to the select monitor connector if that would work.

Or for that matter, if you could just use a USB cable and splice to the select monitor.

I guess i have to be the lab rat for everyone.

Btw, Vikash's cable doesn't work for this scantool, I get no response - which I had anticipated. However, Vikash's scantool works fine with his cable, so I know my ECU was responding properly and all that good stuff.

I see a market in building these cables, The IC circuit is pretty simple. I'd build them if people would buy them and I could make a little profit off it.

bmxkelowna · Post by **bmxkelowna** » Thu May 18, 2006 9:54 pm

scuzzy wrote:I see a market in building these cables, The IC circuit is pretty simple. I'd build them if people would buy them and I could make a little profit off it.

http://www.rslibertyclub.org/forums/sho ... hp?t=58031

scuzzy · Post by **scuzzy** » Thu May 18, 2006 11:04 pm

bmxkelowna wrote:
scuzzy wrote:I see a market in building these cables, The IC circuit is pretty simple. I'd build them if people would buy them and I could make a little profit off it.
http://www.rslibertyclub.org/forums/sho ... hp?t=58031

You're quite skilled at ruining someone's hopes and dreams of mod money, arentcha?

Post by **Legacy777** » Thu May 18, 2006 11:22 pm

Looking at those cables, it's probably be pretty easy to make those short cables.

I suppose I'll have to take a run down to fry's electronics and see if I can find some similar stuff.

bmxkelowna · Post by **bmxkelowna** » Thu May 18, 2006 11:25 pm

scuzzy wrote:
bmxkelowna wrote:
scuzzy wrote:I see a market in building these cables, The IC circuit is pretty simple. I'd build them if people would buy them and I could make a little profit off it.
http://www.rslibertyclub.org/forums/sho ... hp?t=58031
You're quite skilled at ruining someone's hopes and dreams of mod money, arentcha?

you dont have to thank me

Legacy777 wrote: Looking at those cables, it's probably be pretty easy to make those short cables.

I suppose I'll have to take a run down to fry's electronics and see if I can find some similar stuff.

if you manage to get it working and wana sell one, ill be waiting

my3awds · Post by **my3awds** » Thu May 18, 2006 11:48 pm

Wow, this would be sweet if it works on an OBDI 93-95 impreza. The ROM id listed as 93-94 NA wouldnt happen to work for a 93 n/a imp would it ~sigh~

vrg3 · Post by **vrg3** » Tue May 23, 2006 3:35 pm

Well, I emailed him. I got no reply but I guess he put my name next to the ROM IDs that I "contributed." Too bad some of those won't work...

My serial cable does level-shifting but not inverting, so it doesn't subsitute for a MAX232. The discrete circuit presented on that page is pretty simple, but actually the simplest way to go is probably a 7805 and a MAX233. You can get away with using just those two chips and nothing else. It can cost a buck or two more though.

I could imagine that someone might manufacture a USB-to-RS232 adapter that would work, but most such adapters won't. They tend to be designed for things like Palm syncing, so they don't bother making them work at nonstandard bitrates and stuff. That's just been my experience, though.

Splinter · Post by **Splinter** » Tue May 23, 2006 5:33 pm

They work at 4800, 9600, 19200, 38400 and 48000 if my memory serves me correctly

Splinter · Post by **Splinter** » Thu Jun 08, 2006 2:56 am

Can someone whip up a parts list using Digikey part numbers?

Ive tried searching for some components and each one seems to turn up a dozen results and I dont know which one to use

And vikash, you said you could do this with just a 7805 and an MAX233

How?

vrg3 · Post by **vrg3** » Thu Jun 08, 2006 4:42 am

Something like this:

Connect MAX233 pins 10 and 16 together.
Connect MAX233 pins 11 and 15 together.
Connect MAX233 pins 12 and 17 together.
Connect MAX233 pin 2 to Select pin 2.
Connect MAX233 pin 3 to Select pin 3.
Connect MAX233 pin 5 to DB9 pin 2.
Connect MAX233 pin 4 to DB9 pin 3.
Connect 7805 pin 1 to Select pin 5.
Connect 7805 pin 3 to MAX233 pin 7.
Connect 7805 pin 2, Select pin 9, MAX233 pins 6 and 9, and DB9 pin 5 together.
Enjoy.

As for a Digi-Key bill of materials, I'd do something like this:

7805, Digi-Key part number MC7805CT-BPMS-ND
MAX233, Digi-Key part number MAX233CPP-ND
DB9 connector, Digi-Key part number 209FE-ND
DB9 hood, Digi-Key part number 909GM-ND

Then you just need the radio harness adapter and some supplies like solder, heat shrink tubing, electrical tape, and 20-22 AWG hookup wire.

I guess you might also want a little circuit board and a box for the circuit. For the circuit board I recommend Radio Shack part number 276-159.

555BCTurbo · Post by **555BCTurbo** » Thu Jun 08, 2006 7:47 am

Vikash, your electronic genius boggles my mind!!

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New scan tool for all OBD-I subarus

New scan tool for all OBD-I subarus