Connecting ELM327 to a 2000/2001 3200GT

Fat Arnie · Jun 9, 2012

I have Digimoto, ELM scan and a bunch of other code reading apps on my PC, and I can get them to handshake with the ELM327, but not with the car.

My car is a "Series 2" with the silver exhaust gas recirculators at the front of the engine and the car has a 16pin ODB type connector above the drivers footwell.

The ELM327 is a version 1.5 and is plugged directly into the 16pin ODB type connector.

So am I right in thinking the issue is simply finding the right protocol in order to get the comms up so I can read DTCs or have I missed something altogether more important?

Thanks

rotorheadcase · Jun 9, 2012

I have had success with Unidiag KWP2000 software... it reads basic engine ECU codes but not Maserati proprietary codes... better than nothing though. Mine has the 3 pin Fiat plug and I use a USB *** cable and a 3 pin Fiat adpater.

Neil

Fat Arnie · Jun 9, 2012

Yes,

I think it is the cars with the 16pin ODBII connector, but not ODBII standard protcols which fall into "no mans land" and only a SD2 box will retrieve anything. The nearest SD2 is 76 miles each way from here, and Â£60 a go.

ledlights · Jun 9, 2012

Arnie,

I think it would be worth trying the Unidiag with the USB VW/Audi interface...... I think I've read somewhere that there were a number of cars produced with the new style socket but original comms protocol, and if so, you could try Unidiag running the KWP2000 protocol and slow 5 baud initialisation on the cable straight into your OBD socket. All in for less than a tenner, so not much of a loss if it doesn't work.

Regards,

Steve

MUC3200GT · Jun 9, 2012

In general one has to switch the K-Line of the OBD2 to the specifc Alfa/Fiat/Lancia Positions. According Blafusel:

"For connecting to Fiat and Alfa one has to switch the K-Line to acces the ECUs with Alfadiag and FiatECUScan

The K line has to be disconnected beetween PCB-Board and OBD connector and with a rotating switch one of the desired ECUs on the OBD2 connector can be selected:

OBD connector Pin #, ECU Alfa, Fiat
1 ABS
3 Airbag
7 Motor (ECU), Gearshift ECU Selespeed
8 Code Elektronik
9 Aircondition
11 Alarm, Remotecontrol"

But to my understanding the line 7 should be the standard one connected to the K-line of the OBD2 adapter so connection to Motor ECU should work per default.

(I have an 3200/99 with 3 PIN Alpha/Fiat/Lancia to OBD2 adapter and there the UNIDIAG with KWP2000 protocol the slow 5 baud initialisation works)

davy83 · Jun 9, 2012

I have a 2001 3200 GTA and also an ELM ODBII adapter. I found it was software that was the big issue. My laptop is at work so i won't be able to tell you what software i used till Monday, but i got one that read the DTC's and all the emmision sensors and engine speed and all that jazz. Don't have direct diagnostics for the gearbox or suspension beyond the codes, but its quite handy. Will post Monday let you know which software i used.

Fat Arnie · Jun 9, 2012

Davy, Can you let me know if the last digits of your VIN are above or below 3385, then I should be able to figure out if your car is newer than mine or not. That will help me figure out if it is ODBII or not.

And if you can email me the software type and some screenshots of how you have configured it, that would also be really useful. I have PM'ed you my email address.

Could you also confirm your ELM 312 is the USB attach version not the Bluetooth. Mine is a USB running version 1.5a software.

Thanks

I would add that the ELM 327 detects there is a connection to the car, senses 12v supply from the ODB socket, by fails to get a response to the initial send of data. I think its probably the comms protocol or a pinout issue for the data. The INIT command fails.

saintetienne · Jun 9, 2012

Arnie ,

by the sound of it your car is a 2001 model which should be fully obd compliant (if it has emission control devices it should be) - any generic reader should work - so your elm should work with any standard software, it is only the earlier cars that can be tricky ( mine has 16 pin connector but is not compliant ! ) sounds like your comm setings may need tweaking
cheers

Fat Arnie · Jun 10, 2012

Saintetienne, Mine is the same as yours - its a crossover car from Series 1 to Series 2, so also has 16 pin connector but is not compliant !

saintetienne · Jun 10, 2012

Arnie ,

I thought you said your car had recirc valves - that would make it a 2001 model and should be compliant ( are you thinking it is not compliant becasue it has not connected ? ) , mine does not have them ie 2000 model - puzzled !

The way to tell for sure is to get a picture of the ecu in the drivers footwell - the 2001 has slightly different codings

The attached file is a pic of a non eobd compliant ecu (like mine) if it a 2001 eobd compliant you will see the code "eobd" listed in the numbers - hope this helps ,

cheers

Fat Arnie · Jun 10, 2012

Saintetienne - Ill take a look as I think this will help others who have the same issue.

Anywayl, this morning I got myself Unidiag with the KWP2000 definition files and set the 5 baud init - but this time with a VW ***-COM lead instead of the ELM 327. Hey presto we have a connection. Yippee.

BUT......

The code revealed however is an old friend, 0331, which is knock sensor.

I have replaced both knock sensors twice, in January and 2 weeks ago after Roberts diagnosed the rear sensor as failing.

SYMPTOM:

So the CEL light appears if there is a 0331 in the logs.

Clearing the logs which the engine running, clears the CEL.

You can then drive the car, athough power above 4k rpm is not as strong as it should be. CEL does not reappear during driving.

If you then switch off the ignition, the CEL reappears as it is read on start-up diags from the log.

Any ideas? Could Eurospares have a duff batch.

As brilliant as the 3200 is when its running fine, this and the suspension error light (new Phonic rings being fitted in a week) is making me hate it!

stradaman · Jun 10, 2012

Arnie, you have an intake airleak, quite possibly inlet manifold. Any airleak around manifold, will preignition the timing, causing the knock sensor, to malfunction. Done loads on Ford Mondeos. Poor mid power, pinking slightly[you may not hear pinking, due to engine/exhaust noise]. Isn't the 3200 known for manifold problems?
As for scanning, be careful with the Autodiag. It can spike, and bu**er your ecu! I always refer Masers to an INDY, with right equipment.
Andy

ledlights · Jun 10, 2012

Arnie,

For what they're worth, there are 2 things I can think of. Firstly, check for connection issues on the sensor and upstream from it; I once had a specialist try to replace a brand new suspension transducer because the DTC said it was at fault, when in fact all it required was a slight twist of the contacts in the connector. The second thing is that you might be getting pick-up from a mobile phone - a previous car (different make) needed a new piece of loom from the sensor because the shielding had failed - it used to bring on the check engine when I received a txt message or if the phone polled the nearest transmitter.

Other than that, did you have a coolant leak which caused the original sensor to go down? If so, have you got coolant in the loom which is causing a problem?

Hope this helps,

Steve

saintetienne · Jun 10, 2012

That's good news Arnie - main thing is your connected !
I have had knock sensors codes and done them as well , only thing to mention is sometimes the "spider" of water pipes in the v under the plenum can leak slightly - if the knock sensors get damp the can misbehave - I would doubt a duff batch - mine came from Eurospares ( allright at the mo - touch wood ) - does the car run well when really warm and light stay out then ?

ledlights · Jun 10, 2012

Andy,

Is Autodiag the same as Unidiag? I thought Autodiag were standalone OBD2 testers.

Regards,

Steve

saintetienne · Jun 10, 2012

Must admit I have used unidiag for years - no issues

stradaman · Jun 10, 2012

ledlights said:
Andy,

Is Autodiag the same as Unidiag? I thought Autodiag were standalone OBD2 testers.

Regards,

Steve

Sorry, meant Unidiag.
Depends on system. On really hard systems, like Ferrari, Maser, Saab, and Volvo, for example, I have seen people damage the ECU, using Unidiag, etc. All it needs, is one stray spike, and duff!
I wouldn't want to price a replacement ECU, on any of those, ive mentioned!
But, if it works, and all is well, then good luck.

Andy.

ledlights · Jun 10, 2012

Oh, okay. I've not seen this on mine or the Unidiag forum. but maybe it's caused by duff/cheap interface leads?

The VWAudi Group lead is supposed to use opto-isolators so that the car and the PC aren't linked electrically - it means that the car supply is powering its own side of the interface and the pc is isolated. Usually ECUs blow when they see a high voltage but on ISO14230 (KWP2000) interfaces the high signal level is 0V and the low +12V, so as long as the vehicle is supplying the level there shouldn't be a problem.

Steve

Fat Arnie · Jun 10, 2012

Stradaman,

It's not the inlet manifold - I checked this quite recently and changed the gasket as a precaution in January. The issue seems to come and go - were it loss of manifold pressure, the car would run over stoichiometric not below anyway would it not?

Steve and Saintetienne

There is no coolant in the engine V, (established using tissue on a flexible rod technique) and np loss from the header tank.

So I think it must be electrical - I have cleaned the loom connections and will go for a test drive after the F1, so lets see.

Will report later on.

The good news is that although the CEL light clears and does not return until an ignition reset, the iissue of the KS retarding ignition to reduce power is always there, so it should be easy to nail.

ledlights · Jun 11, 2012

Arnie,

Good luck getting to the bottom of your fault.

For what it's worth, I've had my 3200 since 2006 and although I've had my share of problems, they haven't all happened at once. On the whole it's been a great car, so I hope you can get through these teething problems and have a clear spell so that you can have some fun and enjoy it's exoticness (...hang on, that's not a word). I always smile when I open the garage and see the rear lights.

Regards,

Steve

Connecting ELM327 to a 2000/2001 3200GT

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