General Read fault codes on Marea 1997

[Scklein]

Hello

Is it possible to read the fault codes on an 1997 100PS TD?
I tried it with a launch X431 and it didn´t work! I heard the cars from 1995 to
1998 are very complicated to read the fault codes and there are no
interfaces that work?!
The problem on the Marea is the airbag.... With the X431 i couldn´t connect to engine, airbag, ABS... nothing did work.

Any Ideas?

Säcklein

 

[jug]

there are seperate 3 pin connectors, one is for the main ecu, one fo rthe airbag, one for the ABS. to connec to the 3 pin connector you need some lengths of wire to go between the OBD cnnector on the launch X431 and the 3 pin connector on the car. there are dozens of prevoous threads explainig how to do this, have a read. your car uses a slightly modifed ISO9141 protocol, the launch x431 can use that protocol so it should work if you connect it correctly. i cant remember which connector is for the airbag.

 

[EI4GGB]

the launch doesent seem too good on our older pre OBD2 fiats unfortunately.. I dont think things have changed much with the last update i seen. they seem to be concentrating on newer stuff..

 

[Scklein]

THX for your answers. Sorry about my english, I´m from Austria. Yes, there are separate connectors. The one for airbag is behind the glove box.
There is no chance with the launch...
New updates will not help, as stylers wrote (I think so too).

I will search for older posts with the same problem... Maybe there´s a cheap solution to do this.

But one more question... Does anybode know the uniscan/euroscan/visa? Will it work on such Fiat cars pre 1998??

Frank

 

[Scklein]

....I used the search engine, but i didn´t find any guide how to read the fault codes. Could you please give me a link???

Or could you what I need? Which interface, which software?

Frank

 

[EI4GGB]

two scanners i know that do talk to are the "snap-on" handheld scanner (the red box one with all the different "keys" you have to plug in) and the "brainbee" workshop PC based scanner system. You should be able to find a garage with one of these somewhere..

 

[jug]

you can easily make a OBDII to RS232 converter if you're handy with microelectronics, there are many websites with pcd diagrams and parts lists. the parts cost about £10. alternatively you can buy one prebuilt from someone like http://www.elmelectronics.com/
you need the ELM323 or 327 converter.

this will give your laptop everything it needs to communicate with obdII vehicles.

now you need to connect that obdII connector to your car. each diagnostic connector has 3 pins (there are 2 or 3 connectors on your car, one for main ecu, one for airbag, one for abs if you have abs).

to connect an obdII reader to a fiat 3pin plug you need 4 lengths of wire. use 3 lengths of wire to connect the 3 pin connector to the obd connector. also use 1 length of wire for power to the obd connector.

on the 16 pin obd2 connector use the following pins
4- chassis ground (connect to ground on 3 pin connector, or any good chassis earth)
5- signal ground (connect to black wire pin on 3 pin connector)
7- k line (connect to white wire pin on 3 pin connector)
16- 12vDC (connect to battery positive terminal)

for software use uniscan, which can sometimes be downloaded for free using torrents.

 

[BRAVARulez]

As i am owner of a Uniscsan-Euroscan Visa i can say for sure that this interface will work with your car, also do for Airbag but i am not sure for ABS.

 

[jug]

wow it does the airbag too! i didnt know that.

 

[keym]

Hello,

i have a odb2 interface and i was going to connect it to the diagnostic socket but my fiat marea (1.6 1997) have different wiring colors. instead of:

on the 16 pin obd2 connector use the following pins
4- chassis ground (connect to ground on 3 pin connector, or any good chassis earth)
5- signal ground (connect to black wire pin on 3 pin connector)
7- k line (connect to white wire pin on 3 pin connector)
16- 12vDC (connect to battery positive terminal)

i have:
1 - white-red
2 - black
3 - white-light blue

 

[keym]

Here is what i've found from wiring diagrams (sorry for my english):

1 - white-red (K-LINE)
2 - black (GND)
3 - white-light blue (L-LINE)


So on the ODB2 side i used the following pins:

4 (GND) - connected to chassis ground
5 (SGND) - connected to GND on diagnostic socket
7 (K-LINE) - connected to K-LINE on diagnostic socket
15 (L-LINE) - connected to L-LINE on diagnostic socket
16 (+12V) - connected to +12V battery

But still i have no connection. It says: "Interface communication failure - check connections and power supply".

The K-Line and L-Line suggest it's one of these protocols:

ISO 9141-2. This protocol has a data rate of 10.4 kbaud, and is similar to RS-232.
ISO 9141-2 is primarily used in Chrysler, European, and Asian vehicles.
pin 7: K-line
pin 15: L-line (optional)
UART signaling (though not RS-232 voltage levels)
K-line idles high
High voltage is Vbatt
Message length is restricted to 12 bytes, including CRC

ISO 14230 KWP2000 (Keyword Protocol 2000) used by most European and Asian manufacturers.
Alfa Romeo, Audi, BMW, Citroen, Fiat, Honda, Hyundai, Jaguar (X300, XK), Jeep since 2004,
Kia, Land Rover, Mazda, Mercedes, Mitsubishi, Nissan, Peugeot, Renault, Saab, Skoda,
Subaru, Toyota, Vauxhall, Volkswagen (VW) since 2001, Volvo to 2004
pin 7: K-line
pin 15: L-line (optional)
Physical layer identical to ISO 9141-2
Data rate 1.2 to 10.4 kbaud
Message may contain up to 255 bytes in the data field

Oh, yeah. I have an ELM327 interface. Is it even possible to get connection with ECU using this tool or my effort is useless?

 

[Migaard]

Hi Keym.

Are you sure the blue/white is L-line?

Cheers Michael