Anyone had any success with an ELM323/327 interface

as said in the other thread argo the jtd seems to run fine with the maf disconnected, i believe the ecu just uses default readings if it cant get one from the sensor. no fault code has ever been thrown up on my car with it disconnected either.

do you have to choose what ecu you have in the car? my mate works at a garage and his diagnostic tool does the same thing, give junk readings.

I have successfully connected an eBay cheapo USB323 to my 2004 JTD, all the outputs & charts seemed to be reading correctly. I relied upon some advice I'd snipped & saved from a forum (probably this one!), and have pasted it below :

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What software are you guys using to read the diagnostics on the Stilo (JTD) and are there any special settings?

I have an ELM323 adapter but it doesn't seem to work using Scantools, ScanMaster or Obd2spy. The software recognizes the ELM adapter ok, but I get "NO DATA" from the ECU.

I can talk to the ECU using the "raw" ELM commands in a terminal session, but only if I use the fast initialization method (ATFI). Using the slow initialization I get -
>ATZ
ELM323 v2.0
>ATSI
BUS INIT: ...OK
>0101
NO DATA

whereas the fast initialization gives-
>ATZ
ELM323 v2.0
>ATFI
BUS INIT: OK
>0101
41 01 00 06 80 00
>

I have also tried forcing the protocol in ScanMaster to ISO 14230-4 KWP (fast init, 10.4 Kbaud) but it still is unable to connect.

I finally managed to get this thing working. For some reason, the ECU ONLY responds when initialized using "fast initialization" method as per the initial post.

I tried using the hardware handshaking as suggested earlier, but this didn't seem to change anything (I don't think the ELM has a RTS/CTS line). I also tried changing the serial buffer size (from 1 byte up to 14) with no success. A USB to RS232 converter to the ELM also didn't work. I even tried a different laptop.

The ONLY thing that seems to work for me, is if I manually initialized the adapter using the "ATZ" then "ATFI" commands.

I can do this with DigimotoLite using the "Serial Interface" tab and also with OBD2 ScanMaster Freeware Edition 0.4.0.0 using the "User definable ELM command" in the terminal window. Once I did that, I could then go back to the start and it seems to work.

There also appears to be a bug in the ScanMaster-ELM demo. Under the communications options, you can select the different protocols (i.e ISO-14230-4 KWP (fast init, 10.4 Kbaud) but it still tries to use the slow init. The demo version has a terminal option, but after you sent the "ATFI" and go back to connect, it re-initializes the ELM and puts it back to a slow init.

Good luck!

January 2003 was the big changeover to OBD2 for Euro diesel cars. If you have a 2002 then it's just pot luck. That's why people with 2003 cars onwards can connect easily and others with earlier cars are very limited as to what they can read from the ECU

See http://pagesperso-orange.fr/veydiag/GUIDE%20EUROPE.pdf

Just trying to get my interface and software connected to Stilosporting's JTD and it's reporting garbage...almost identical figures to those argo's had.

did we come up with asolution for this?

Thar's odd

I'm sure Stilosporting drives an '05

he does.

i'm using an elm 327 pc interface on USB with gendan software.
it connects to mine fine and reads the info perfectly. (as do at least 2 other pieces of software I have).

but plug it into frank's car and it reports gibberish...

and its very frustrating? i was going to buy elm 327 usb but until we find out why they dont talk to the jtd its pointless

so does anyone know why these types of interfaces dont like the jtd?

or does anyone know what WILL work with the jtd? i really want to get one but at the moment there is no hope

I haven't read the whole thread or know anyone else's state of tune but could it be that it's because you've had yours remapped?

no because argo hasnt had his remapped as far as im aware? Argo?

Just a thought really. I had problems with my Leon connecting to my laptop after the remap, alot of cars do. In fact, the tuner had to remove the ecu from my car to remap it as he couldn't do it through the OBD port.

No; mine's not remapped (yet) and I can't believe a remap could affect the output from the ECU anyway.

I'm as puzzled by this as everyone

Has anyone else tried talking to the ECU manually (post #17)

I've tried "ATZ" then "ATFI" but get an error. I've a feeling if I hadn't got that error then it might have worked (tried it many times now )

Give it a go

could you explain that in a bit more detail? and what software are you using?

You need to get a more expensive, faster USB2 or PCMCIA serial port adapter. If you have an old USB 1 cheap adapter, they often do not support the requred baud rate and cause garbage, things to not work etc.

Get a FTDI Chipset based one. They should work.

It's only 9600 baud

In any case it's exactly the same with a standard RS232 9 pin Com port.