(T) How to scan the car

If i plug an obd2 scanner with the 3 pins connecter converter is it gonna work? otherwise how to scan it?
I have a Punto s55 1997 1.1L Mono injection.

Hi,
No it won't work at all. The 3 pin interface is not OBDII compatable.
You need Multiecuscan (MES)
www.multiecuscan.net
with a KL / Vag-Com interface and 3 pin adaptor lead.

An example is https://www.ebay.co.uk/itm/Diagnosti...N/271891117741
(I've used this seller)
Check your exact model of Punto here http://www.multiecuscan.net/SupportedVehiclesList.aspx

You will need to register MES(50 Euros) and need a windows laptop (XP or newer)


Robert G8RPI.

thanks for reply.

But if its not working why would they sell it then ? https://www.aliexpress.com/item/2018-for-Fiat-OBD1-3pin-to-OBD2-16pin-cable-for-Fiat-diagnostic-interface-3-pin-OBDII/32539202203.html

What is this please? a KL / Vag-Com interface

The lead they are selling will work but only with a KL / KKL / Vag-Com interfac and software that specifically supports the older Fiat 3-pin protocol, e.g. MES.
You are better off buying the kit from UK diagnostics than Aliexpress

Oh the KL / Vag-Com is for connecting to a computer with the obd2 3 pins ...i see

well i already order the 3 pins so i only need the connector for the computer now ...dawn!

Is this connector will work? https://www.aliexpress.com/item/VAG-...ceBeautifyAB=0

Not quite.

The KL / KKL / VAG-COM interface is an early OBDII interface used mainly on VW-AUDI vehicles. The OBD 16 pin interface can support various interfaces including KL (K-line) and CAN (Controller Area Network). These interfaces then have various communications protocols.

The Fiat 3-Pin interface is electrically compatable with KL but the protocol is different. As the VAG-COM KL interface is "dumb" it can be used with the Fiat 3-pin protocol. The "smart" interfaces like ELM 327 work with OBDII (16 pin) KL but DON'T with the 3 pin.

Confusing I know but it does make sense.


Robert G8RPI.

Then you just need the KKL interface
http://www.ebay.co.uk/itm/FIAT-ALFA-...H/281876043346


Robert G8RPI.

Ok thanks alot, but i ordered this 3 pins connector from alieexpress already: https://www.aliexpress.com/item/2018...539202203.html

Is it gonna match with it if i buy it ? https://www.ebay.co.uk/itm/FIAT-ALFA-VAG-USB-OBD2-DIAGNOSTIC-CABLE-ECU-for-MULTIECUSCAN-UK-DISPATCH/281876043346

My concern is, the black alligator clip is not there on the one that you showed me first

The black clip is optional as the 3pin wiring in the car includes a chassis (ground) connection. The red clip goes to a 12V supply e.g. battery terminal.


Robert G8RPI.

all righty !!! thanks alot for sharing your knowledge

Last thing, i see on the forum IAW scan 2 softaware that can scan the vehicule also. What do you think about it? It certainly not as good as MES but it seem that it can do the job. It can show datas from the sensors and also errors codes... thats the only thing i need for the moment ....

Plug your car code reader into the diagnostic link connector under the dash (engine off). Then start the vehicle and follow the code reading procedure in the instruction manual.

I've not used the IAW software but it's designed for the 3 pin interface so worth trying. It should work with the same lead and adaptor as MES.


Robert G8RPI.