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Discussion Starter #1
Hi all.
I've searched the forum but it didn't answer the following questions:

1. Can I simply use a 3 pin (fiat) type obd 1 to 16 pin type obd 2 converter / adapter cable to connect the 164 to an obd 2 scanner? Will it work or does the motronic 1.7 ecu on my twin spark not support obd 2 scanners?

2. If I can find an obd 1 scanner, will I be able to use it to check live diagnosis / parameters such as engine coolant temp, rpm etc?

3. Where exactly is the 3 pin type obd connector on the 164? Near radio wires? Wire colors pls?

As you may know, my speedometer unit does not function at the moment. We are still unable to diagnose the problem with it, but until it is sorted out, we need an alternative way to keep an eye on engine coolant temp etc.
I've seen obd2 scanners that support this, but I also know that the 164, being a 95 car, doesn't support obd 2 scanners due to its 3 pin type connector, hence the 1st question.

Thank you.
Zaid
 

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Hi,
if someone is interested: last year i made up an OBD-installation on my 1992 1.series T.S. with ML4.1.

#1: OBD with switch and LED via connector T2 and blinkcodes
#2: OBD interface via connector T1 and 3-pin to 16-pin adapter plus simple KKL-USB Adapter. Software: AlfaOBD or MES.
Better solution would be OBDKey adapter instead of the KKL-adapter, because the simple KKL-adapter is not stable in data communication because the required K-line timing is done per software under windows (no realtime system).

Fotos available in the document (german language) attached.

ML4.1 does not support OBD2 (and therefore ELM-interfaces) and the various OBD2-software.
 

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Discussion Starter #4
Alfa 164 Diagostics software

Hello

Thank you for the links and help, Evgeny and Max.

I've still not looked for the 3-pin connector but I hope to find it with ease.

Max, you think it would work with mine? Coz I've got a 1.7 motronic system I believe.

HOWEVER,
I found this thread with a little bit of googling:

http://alfaromeo164register.com/diagnostics/index.php

DETAILED HELP AND ALL NECESSARY SOFTWARE FOR YOUR ALFA 164 DIAGNOSTICS. Hope it helps everyone who needs it!

Anyone here already tried it? Does it show live parameters such as Engine Coolant temp etc?

Thank You
Zaid
 

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Zaid,

yes, the software you googled does work also, but it does not work stable on my system, it always crashes, i don't know why but the author claims it as untested for the ML4.1.

Also you can try kwp71diag software.

In general: look at the manuals and the lists of supported cars and ECUs, i think they all should work with the 1.7.
 

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Discussion Starter #6
Thanks for the pdf document you've shared Max.

I followed instructions you've laid out there, but I have the following problems:

1. I cannot verify if I have an M1.7 or 4.1 motronic ecu.
I've attached a picture, if you can help me verify it by the ref number on it.

2. My car doesn't have a 4 pin wire such as yours, like you've shown in your document. There is a 2 pin wire very close to the 3 pin obd connector coming out of the same wiring harness for the ecu.
I've attached a pic for your reference.

Also, can you confirm if I will be able to use the led + switch method to read codes by the blinking led itself?
 
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