another cable question

**greggbruceauto** · 05-04-2013

Frustrated: I don't know enough to figure this out --so now I'm asking for someone who knows more than I: will I be able to make these two work with Tunerpro? or do I just need to buy a new cable with the FTDI chip in it?
I have tried almost every combination of settings I can think of, even tried installing the FTDI drivers just for giggles, and tunerpro still won't recognize the cable

http://www.iogear.com/product/GUC232A/

http://www.aldlcables.com/sc/details.asp?item=aldlobd1

**EagleMark** · 05-04-2013

A long long time ago, when laptops stopped serial ports and went USB, there were many issues with serial to USB converter cables, some worked, some did not. Seems like the ones that worked had installation CD with drivers?

The one on Moates site is USA-19HS

Here's some drivers for that...
http://www.tripplite.com/en/products...xtModelID=3914

**RobertISaar** · 05-04-2013

to deal with GM OBD1 8192 baud communications reliably, you NEED a FT232R to do the work of converting data back and forth. 8192 isn't a standard data rate, which is why it's so unsupported.

**greggbruceauto** · 05-05-2013

Originally Posted by EagleMark

A long long time ago, when laptops stopped serial ports and went USB, there were many issues with serial to USB converter cables, some worked, some did not. Seems like the ones that worked had installation CD with drivers?

The one on Moates site is USA-19HS

Here's some drivers for that...
http://www.tripplite.com/en/products...xtModelID=3914

yep, have the install cd, bought the cable brand new. I will try these drivers, tho.

**greggbruceauto** · 05-05-2013

Originally Posted by RobertISaar

to deal with GM OBD1 8192 baud communications reliably, you NEED a FT232R to do the work of converting data back and forth. 8192 isn't a standard data rate, which is why it's so unsupported.

Sooooooooo -- does that mean my cable (RS232) definitely will NOT work -- and I need one that says FT232R ? Is that a 'type' of serial interface?

**RobertISaar** · 05-05-2013

the FT232R is an IC that will directly convert UART/TTL to USB. it could be paired with other circuits if needed to convert to RS232, but it's more complexity than necessary unless you already have a nice RS232 interface that you don't want to replace.

**greggbruceauto** · 05-05-2013

Originally Posted by greggbruceauto

Sooooooooo -- does that mean my cable (RS232) definitely will NOT work -- and I need one that says FT232R ? Is that a 'type' of serial interface?

so is that yes, or no?

**greggbruceauto** · 05-06-2013

I guess my real dilemma

is whether or not to get another adapter
http://www.mouser.com/ProductDetail/...nzRp8XLQeQIA==
or
http://www.tripplite.com/en/products...xtModelID=3914

that makes my old cable
http://aldlcable.com/sc/details.asp?item=aldlobd1

work, or take it in the ass

for this shit I have already purchased, scrap it all and buy a whole new all in one ALDL to USB already made cable....

http://aldlcable.com/sc/details.asp?item=aldlobd1u

**bobdec** · 05-07-2013

Just for drill, does you PC recognize either of the cables in device manager - com ports . I assume you have good cig lighter +12volts for the 2nd cable (ALDL/RS232) you listed, that's a known good one.

**greggbruceauto** · 05-07-2013

Originally Posted by bobdec

Just for drill, does you PC recognize either of the cables in device manager - com ports . I assume you have good cig lighter +12volts for the 2nd cable (ALDL/RS232) you listed, that's a known good one.

Yes, the cig lighter has good power and ground, it will run my snap on scanner and get data from the car just fine.

yeah, windows recognizes the serial to usb 'bridge' it calls it. It changes com ports depending on which usb port I plug it into.... but still can't get tunerpro to pass the cable test, no matter what settings I put into tunerpro.
I check in device manager to find what com port it is and set that in tunerpro... it always says 'cable not found or not functioning -- tested at 8192 baud' , even if it is not hooked up to the vehicle, (as mentioned on another post -- says it will fail if hooked up to the car) and the yellow message is at the bottom of tunerpro "DA not connected" message shows.

I have even tried unchecking the box for 'use 16550 compatible UART' in device manager properties for the com port to see if that makes a difference.

It's now set at 9600 baud because there's no 8192 option -- wonder if I set it slower if that would work? -- haven't had a chance over the last few days to even get close to the car.

The usb adapter cable has an led on it -- I'm assuming to indicate data flowing, but is on solid if the 12v on the aldl cable is plugged in-- not sure if that's any good for it or not.
The guy at micro-center said there are only 3 serial to usb chips made -- no matter what brand cable you buy it will have one of those in it -- this one matches the specs of the tripplite keyscan usa19hs but he said there's no way he knows to tell which chip it has in it.... (they don't stock the tripplite) ( dunno if he knows what he's talking about or not, but he seemed confident in what he knew)

The aldl cable itself will put the car into diagnostic mode with the jumper set one way( check engine light flashes with lean/rich O2 crosscounts with engine running, or will flash code 12 with key off (no codes stored) ) and with the jumper set the other way, the engine dies. That's without the serial to usb adapter hooked up. and also with the 12v cigarette adapter either plugged in or not -- doesn't make a difference)

The FTDI CHIPI-X10 is only 15 bucks -- the newer aldl to usb complete cables are around 60..... I'd rather spend the 15 if I knew it would work......

I wish I knew where/what to read to understand this stuff, but when typing in rs232 to usb or anything like that, all I get is links to buy some part. If I could learn how this stuff works, then I could figure it out myself.

**RobertISaar** · 05-07-2013

the CHIPI is a USB to RS232 converter... while it could be used, it would be much simpler to use a USB to TTL/UART converter.

http://www.ftdichip.com/Products/Cab...BTTLSerial.htm

if you're into FTDI sourced stuff, that page would be very useful. you'll want one with 5V signaling.

**EagleMark** · 05-07-2013

Have you ever checked the driver?

http://www.gearhead-efi.com/Fuel-Inj...to-TunerPro-RT

**greggbruceauto** · 05-07-2013

Originally Posted by EagleMark

Have you ever checked the driver?

http://www.gearhead-efi.com/Fuel-Inj...to-TunerPro-RT

yep, already did that -- found that post a week or so ago....

**greggbruceauto** · 05-07-2013

Originally Posted by RobertISaar

the CHIPI is a USB to RS232 converter... while it could be used, it would be much simpler to use a USB to TTL/UART converter.

http://www.ftdichip.com/Products/Cab...BTTLSerial.htm

if you're into FTDI sourced stuff, that page would be very useful. you'll want one with 5V signaling.

ummmmm, don't see any serial DB9 plugs on that page....
and no, it doesn't have to be FTDI,

IT JUST HAS TO BE SOMETHING THAT WORKS

**RobertISaar** · 05-07-2013

with what you want to do, you're not going to find many ready-made solutions... reason being that almost everything using a DB9 connector is going to be a RS232 implimentation.... assuming the end of your cable that already exists is just a cable(no MAX232 circuit or something similar in it to convert RS232 to TTL/UART), then a RS232 converter won't work and would likely damage the PCM if it were attempted to be used.