I have an OBD1 adaptor cable and OBD2 reader, but is there any software for the PC out there, as my reader does most cars apart from Fiat, even on 'other' settings, It will not read the OBD.

Also am I right that the 3 pin socket is under the bonnet near the off side wheel strut and OBD box, and the flying lead goes to the positive terminal?

Thanking you all in advance

Rgds Steve

There is software that'll do it on the Mk1s. Best bet PM Woj, who is the Cinq/Sei section ECU guru.

The 3 pin socket, as I'd describe it, is on a short flylead off the ECU, under the bonnet. Find the ECU, and you'll find the socket.

Not sure what you exactly mean by the OBDx cables/adaptors (myself I am not too strong with the terminology), but yes, you need 3 pin plug plus the dangling crocodile clip to +12V. Software wise, your best bet is IAW ECU Scan 2 or Multi ECU Scan (used to be called Fiat ECU Scan). The first is totally free (google it), fully functional and designed with the older ECU-s in mind (developed by a forum member here, so you can contact him directly, from what I know very helpful and responsive guy), the second one is more general and reads way more ECUs (mostly meant for the older generation ECUs), but is somewhat limited in the free version. I also find it a bit rough in some respects.

thank you

see this thread https://www.fiatforum.com/cinquecento-seicento/32328-6f-16f-cinque-sei-ecu-reader-project.html

http://iaw-scan2.sourceforge.net/

Have a look at this. I have downloaded and used it successfully.
You need a cheap VAG Com lead and the 3 pin adapter. Bit fiddly
on windows 7 but does the job.

hi downloaded multiecuscan 1.4 and IAW ECU Scan 2

linked the following
VAG KKL COM USB ODB2 DIAGNOSTIC CABLE 409.1 OBD2 II LEAD tool and fiat 3pin adaptor.

still unable to connect?

1.multiecuscan is free version should I buy the key, or is there a keygen available?
2. what setting should I be using? for both software! please.

again thanking you in advance.
Rgds Steve

I think MES can't do OBD1. For ECU Scan, your best source of info or help is probably the project page (see sourceforge).

If you want the full MES, you should buy the key.

I've had these problems too apparently from what I've seen online about there's a problem with the timeout on the second protocol from ecu and there's only a certain obd2 unit that can read this so it doesn't timeout or you can modify your existing obd2 reader by removing a diode out of a certain place but not 2 sure on which one there is pics and data online about it hope this helps

that's my point, finger99. I still can not get it to work or even see the ecu, so why should i buy it, if it does not work!

Elxpunto90, any idea where online or what to search for?

got a new cable, one for fiat with a switch in the unit for pin 7, pin 3, pins 1/9, and pins 12/13, with the adaptor cable, still not able to conect.

please help this is becoming a :bang:

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FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
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835 posts • Page 1 of 84 • 1234584
yani
Site Admin
Posts: 1111
Joined: 06 Nov 2009, 17:40
FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by yani » 12 Sep 2010, 21:50

Hi,

A lot of people are having problems with some chinese ELM interfaces that cannot connect to CAN network even if they support all ELM 1.3 commands properly. There was one user here who bought 5 of these cheap interfaces with no luck and finally bought an expensive one....
I also have one of these "faulty" units and decided to play with it and see what is wrong.
Well, it seems that the problem is electrical and is not very hard to fix.
The problem is actually in the CAN termination method used in these interfaces - they use one 120 Ohm resistor connected between CAN-L and CAN-H.
According to the ELM327 datasheet the proper termination is to use 100 Ohm resistor on each of the 2 lines connected to ground through a 560 pF capacitor (see the picture below).
So i just got two 100 Ohm resistors and two capacitors of 560 pF and fixed my interface as shows below. And it WORKS flawlessly now.
The procedure is very simple:
1. Get two resistors of 100 Ohm and 2 capacitors of 560 pF. It should work without this. See the NOTE below.
2. Remove the single terminating 120 Ohm (or whatever) resistor from the interface
3. Solder the new termination circuit. I did it directly on the OBD connector as it was easier for me. I did it in a hurry just for the so don't blame for the soldering quality on the pictures. It should work without this. See the NOTE below.
4. Go to your car and enjoy....

NOTE: It is reported that most of the new interfaces now have this problem!
It was also reported by many users that the problem can be solved by simply removing the 120 Ohm termination resistor (which is connected between the two CAN lines, it is R14 on my photos but might be marked with different number on other interfaces) from the interface.

Please, someone with knowledge in the circuits to explain these better as I don't have time for more details.

PLEASE NOTE: This post is for interfaces that respond properly to all ELM commands in my "Test" which is in the Settings dialog (all commands should have response OK). If you have OK to all commands and can connect to engine, but cannot connect to anything on the CAN bus (like Body Computer, Dashboard, Service Reset) then this post may help you.


The original board of the "faulty" interface
elmfix1.jpg (92.53 KiB) Viewed 99465 times


The bottom side of the board. The terminating resistor is circled in red
elmfix2.jpg (92.79 KiB) Viewed 99465 times


Removed the old terminating resistor
elmfix4.jpg (79.36 KiB) Viewed 99465 times


Soldered the new terminating resistors/capacitors on the OBD connector
elmfix5.jpg (92.79 KiB) Viewed 99465 times


Proper termination as listed in ELM 327 datasheet
elmfix6.jpg (64.57 KiB) Viewed 99465 times


Yani
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mino182
Posts: 4
Joined: 08 Jan 2010, 19:24
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by mino182 » 13 Sep 2010, 11:23

Hi, please, where can i find ground? pin 4? Thank you.
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yani
Site Admin
Posts: 1111
Joined: 06 Nov 2009, 17:40
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by yani » 13 Sep 2010, 12:14

Pins 4 and 5 are both ground.
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temppu
Posts: 1
Joined: 08 Sep 2010, 08:36
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by temppu » 13 Sep 2010, 21:12

This really works fine!

Very big thanks yani!!!!
I'm happy man now
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mhowse
Posts: 4
Joined: 09 Apr 2010, 15:39
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by mhowse » 17 Sep 2010, 15:37

Much Thanks for mod.
.been having no joy connecting stilo 1.9jtd 2003 to service reset and been holding off trying other elms as think they may be fakes also..got the parts in uk maplins store, resistors and capacitors for 82p bit of soldering , solderd both fly leads from capacitors together then single connection to ground onto pin 5 to save soldering problems to pins 4 and 5 and now fake elm connects to service reset and other options great..

much thanks for your effort in sorting out the annoying service reset for me as shall be doing oil filter change this weekend.
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JTD171
Posts: 10
Joined: 13 Nov 2009, 21:51
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by JTD171 » 19 Sep 2010, 15:29

Can anyone help me out my elm327 dosent seem to be the same layout as in Yani's pics so I dont know where to put the resistors and capacitors.
Attachments

CIMG0007.JPG (1023.83 KiB) Viewed 99144 times

Different layout to Yani's pics
CIMG0011.JPG (1.63 MiB) Viewed 99144 times
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steph48
Posts: 3
Joined: 04 Sep 2010, 16:16
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by steph48 » 19 Sep 2010, 17:51

> To JTD 171

Hi JTD 171,
I have the same circuit as you, and the same problem as described by yani (connect to engine is ok, and others ECU KO).
After a look at this one, I think that the case described by Yani is not applicable for this circuit.
So there is also a difference between this layout and elm327 spec.
I have updated your picture, so you can see the correspondance between your layout, the layout described by yani and the elm 327 spec.
First, resistors R32 and R33 are just equals to 100 ohms. I don't have capacimeter to test capacities. So I think the problem is not the same as the one described by Yani.
So we can see that R33 resistor value is 21 kohm on the layout. The ELM327 spec wants a 4,7kohm resistor.
I wil test with a 4,7kohm resistor for thr next two weeks.

Steph48


CIMG0011.JPG (1.78 MiB) Viewed 99124 times
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devc
Posts: 29
Joined: 13 Feb 2010, 21:34
Location: South Africa
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by devc » 19 Sep 2010, 18:06

R1, R2, C1 & c2 are the components Yani is talking about. You interface is correct.
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JTD171
Posts: 10
Joined: 13 Nov 2009, 21:51
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by JTD171 » 19 Sep 2010, 19:14

OK thank you
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steph48
Posts: 3
Joined: 04 Sep 2010, 16:16
Re: FAULTY ELM 327 INTERFACES DE-MYSTIFIED (READ HERE)
by steph48 » 20 Sep 2010, 20:11

Hi,The JTD171 interface seems to be correct but I have the same and:
- I have OK to all commands and can connect to engine, but cannot connect to anything on the CAN bus (like Body Computer, Dashboard, Service Reset).
My vehicle is a FIAT Croma 1.9 16v (150cv).

I have replaced the R5 resitor on the circuit (R31 on the ELM datasheet) by a 4,7kohm resistor but no change. The problem is the same.

If anyone can help me.:
In order to debug the problem I scanned the com port while multiecuscan tried to connect to 2 differents ECUs (Engine (succesfull) and body (failed) ):

BODY ECU :
Code: Select all
Port ouvert par le processus "Multiecuscan2.exe" (PID: 4068)

Requête:19/09/2010 16:24:02.01264 (+169.1406 seconds)
41 54 5A 0A 0D ATZ..
Réponse:19/09/2010 16:24:03.93464 (+0.9219 seconds)
0D 0D 45 4C 4D 33 32 37 20 76 31 2E 35 61 0D 0D ..ELM327 v1.5a..
3E >

Requête:19/09/2010 16:24:03.95064 (+0.0156 seconds)
41 54 45 30 0A 0D ATE0..
Réponse:19/09/2010 16:24:03.99764 (+0.0469 seconds)
41 54 45 30 0A 0D 4F 4B 0D 0D 3E ATE0..OK..>

Requête:19/09/2010 16:24:03.99764 (+0.0000 seconds)
41 54 4C 30 0A 0D ATL0..
Réponse:19/09/2010 16:24:03.05964 (+0.0625 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:03.05964 (+0.0000 seconds)
41 54 48 30 0A 0D ATH0..
Réponse:19/09/2010 16:24:03.12264 (+0.0625 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:03.12264 (+0.0000 seconds)
41 54 53 50 43 0A 0D ATSPC..
Réponse:19/09/2010 16:24:03.16964 (+0.0469 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:03.16964 (+0.0000 seconds)
41 54 53 30 0A 0D ATS0..
Réponse:19/09/2010 16:24:04.23164 (+0.0625 seconds)
3F 0D 0D 3E ?..>

Requête:19/09/2010 16:24:04.23164 (+0.0000 seconds)
41 54 43 41 46 30 0A 0D ATCAF0..
Réponse:19/09/2010 16:24:04.29464 (+0.0625 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:04.29464 (+0.0000 seconds)
41 54 43 46 43 30 0A 0D ATCFC0..
Réponse:19/09/2010 16:24:04.34164 (+0.0469 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:04.34164 (+0.0000 seconds)
41 54 43 52 41 20 37 43 30 0A 0D ATCRA 7C0..
Réponse:19/09/2010 16:24:04.40364 (+0.0625 seconds)
3F 0D 0D 3E ?..>

Requête:19/09/2010 16:24:04.40364 (+0.0000 seconds)
41 54 53 48 20 37 42 30 0A 0D ATSH 7B0..
Réponse:19/09/2010 16:24:04.46664 (+0.0625 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:04.46664 (+0.0000 seconds)
41 54 41 54 31 0A 0D ATAT1..
Réponse:19/09/2010 16:24:04.52864 (+0.0625 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:04.52864 (+0.0000 seconds)
41 54 53 54 32 39 0A 0D ATST29..
Réponse:19/09/2010 16:24:04.57564 (+0.0469 seconds)
4F 4B 0D 0D 3E OK..>

Requête:19/09/2010 16:24:04.59164 (+0.0156 seconds)
30 34 20 30 32 20 31 30 20 38 31 0A 0D 04 02 10 81..
Réponse:19/09/2010 16:24:04.80964 (+0.2188 seconds)
4E 4F 20 44 41 54 41 0D 0D 3E NO DATA..>

Requête:19/09/2010 16:24:05.30964 (+0.5000 seconds)
41 54 50 43 0A 0D ATPC..
Réponse:19/09/2010 16:24:05.32564 (+0.0156 seconds)
4F 4B 0D 0D 3E OK..>

Port fermé



Thanks for any help.

steph48
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You can get the kits already done and made up on eBay

Pink192 said:

that's my point, finger99. I still can not get it to work or even see the ecu, so why should i buy it, if it does not work!

Click to expand...

MES won't, AFAIK, work on OBD1. As I said about 3 posts ago. :bang:

Fingers99, I understand that, but then you stated about buying it!

that's where the confussion has come from! lol.

update:

I have now used multiecuscan 1.4 and IAW ECU Scan 2, with my new Fiat cable with a switch in the unit for pin 7, pin 3, pins 1/9, and pins 12/13, with the 3pin adaptor cable, still not able to conect.

just managed to got another software package today, it does see the cable, put i'm unable to connect to car untill tonight, to check it works, will feedback later.

failing that, I will look at the post from Elxpunto90, and take my cable apart!

Rgds
Steve

sorted, used IAW ECU Scan 2, with my new Fiat cable with a switch in the unit for pin 7, pin 3, pins 1/9, and pins 12/13, with the 3pin adaptor cable, started engine and conected, the results!

Next question, where can I find the data to compare the results, please.

again thanking you in advance.

Rgds
Steve