Technical Fiat/Lancia Diagnostic tool.

Currently reading:
Technical Fiat/Lancia Diagnostic tool.

I think I saw something of this kind in halfords, worth checking it out.
 
there are millions of obd readers on the market, ebay is full of them. check your model or ecu is included on the compatability list before you buy one. also remember a reader is different to a flasher, if all you want to do is read fault codes pretty much any obd reader will work, they usually come with a few adapters but the 3 pin connector is most common and usually the default on most readers. buy direct from china to get a good price.
 
There are millions all right, but not that many that work properly with Fiats, because they implemented the protocols slightly differently. just because its says OBD does not mean it will work with a FIAT, even though its an OBD interface..

Owen.
 
If its the 3 pin pre-1999, then dont think that you can do OBD on it, you can read codes back from ECU however simply with rs232 to 12v logic converter interface. The problem is getting some software to drive it. I have made up a simple programme which returns the codes, which I use for immobiliser and key testing, but it will equally return the engine info if requested. My programming isn't pretty but it does the job for me, if you are interested I can e-mail the info. The Translation of diagnostics, needed to interpret the codes of system by Arse is available on this site I beleive.
Tony.
 
If its the 3 pin pre-1999, then dont think that you can do OBD on it, you can read codes back from ECU however simply with rs232 to 12v logic converter interface. The problem is getting some software to drive it. I have made up a simple programme which returns the codes, which I use for immobiliser and key testing, but it will equally return the engine info if requested. My programming isn't pretty but it does the job for me, if you are interested I can e-mail the info. The Translation of diagnostics, needed to interpret the codes of system by Arse is available on this site I beleive.
Tony.

Hi, I am interested in reading the fault codes from my 1995 punto (3pin connector)

I have an interface my father built to communicate with the old analogue sky boxes (MAX232) will this work with fiat?

kind regards. Richard
 
it should work, the max232 converts the 0v and 5v of TTL into +10v and -10v for rs232, so it does the same thing and will work with your car provided you have the correct software that uses the same protocol as the car, which you could ask reddy4bed for.
 
Cheers, im guessing the output wiring will need to be altered, he has it goint into a scart lead at the moment as it used ti interface into the internal decoder of BSKYB receivers.

does anyone know any info on how to alter it?

kind regards, Richard

PS how often does reddy4bed come online?
 
to alter it you need to identify which 4 pins on the scart are needed. one of them needs to be connected to a 12v power supply (battery), another needs to be connected to an earth (earth pin on 3 pin connector) and then you have the signal line (connect to black wire's pin on 3pin connector) and the k line (connect to white wire's pin on 3pin connector)

with a bit of luck there will only be 4 pins used on the scart connector, or 5 if the skybox needed a wake up signal. if you examine a pin map for a scart i'm sure you can determine which pin is used for what. this should help http://www.electronics2000.co.uk/data/pinout/scart.htm

without seeing it for myself, my first guess would be;
pin10 is the signal line
pin12 is the k line
pin14 is the earth

i'm not sure which pin the power comes from
 
Last edited:
here's a simple interface that should do the job, also the exe file top be run from DOS, also included the assembly file so you can write a decent program, but just let me have a copy when you do one!.
BTW this version hardware not tested it but it should work.
 

Attachments

  • PUN.zip
    28.2 KB · Views: 1,561
Last edited:
here's a simple interface that should do the job, also the exe file top be run from DOS, also included the assembly file so you can write a decent program, but just let me have a copy when you do one!.
BTW this version hardware not tested it but it should work.

Thanks for that.

I hav found the documentation my father must of used to build the videocrypt interface.
 

Attachments

  • videocryptint.txt
    18.5 KB · Views: 362
This interface with what cars is compatible after 2000 or before (What protocol uses ISO-9141) and can it be compatible with any known programm like Autodiagnostic tool or ScanTool or something like that?
 
I have given the drawing to my father, he will build it at work if he gets time or get the components sorted so i can build it.

He said he doesnt use the old style MAX232 there is a newer equivalent that is much smaler (surface mount) the size of a finger nail!

I am looking for autosketch if anyone has it? Thats the program he uses at work and i beleive it enables you to print and emulate the circuit board layout. If i can get the drawing sorted all he needs to do is prepare the circuit board and solder components on.

What program do you guys use? I used to use boardmaker long tome ago on the old 386 but managed to break the dongle by standing on it!!

kind regards, Richard
 
BRAVARulez:: I dont think this interface will work with the newer cars as its for PRE OBD/OBDII. A couple of garages with the newer equipment have tried to read the ecu on my punto but the protocols are wrong. so if this interface works with the punto it wont work with OBD.

feel free to correct me if i am wrong guys.
 
Last edited:
This interface with what cars is compatible after 2000 or before (What protocol uses ISO-9141) and can it be compatible with any known programm like Autodiagnostic tool or ScanTool or something like that?

The interface will work with everything I guess right up to KW2000, its just that the K and L needs to be linked directly together for simplex operation, (the early Punto is duplex, tx and rx seperate).
Also remember that the unit is just an interface, and all the instructions, timing etc must come from the PC. This incudes initialisation routines.. well everything.
 
Back
Top