well i think noone here has sed, that it will costs THAT little. Anyway, if u say that only problem is voltage, then u shuld make 12v > 5v and 5v >12v converters between the connection and would work for pc com port? so u can write ANYTHING to the com port, so if it would work, it doesnt matter what excact code it gives, u just have to know it and how .

So point, still needed to get some easy way, so i bet theres ppl who buy controller, use code that they have and sell it (u would have to make the rest), ofc it wount be as good probably...

anyway i hope then... sure could use one, just getting diag done 1 time would cost about half the price with sending ETC...

The problem isnt just the voltage, its timing. I built a few of my adapters for literally 60 pence, its the connectors and cable that cost more.

Keeping the connection open requires very precise timing on the communications side, you have to keep the connection alive. This can be difficult with a modern PC as they are multitasking and a program or windows process in the background can interrupt this and cause the connection to be lost.

If you are interested in how it works you can find the fiat technical documents on this very easily (check the opendiag yahoo group for example, there are two - one on fiat 9141, another on ISO14230-2 (KWP2000) ) they explain how it works and the timing required.

Aslong as you use the standard KWP2000 protocol you can read and clear the codes on the older Bravo's i.e Strokes.

I found the 16pin odb plug to cost the most. Cable was cheap and the bits and pieces. Also the USB to RS232 convertor costs quite a bit for what it does, but nonetheless its easy to make and run.

ehh? so all i would need is pc with SERIAL port and cable from 3 bin to 16bin? + soft ofc?
heh dont know much about car diagnostics... so srry . coz i cant buy full readers here, could u name exact things i need .. just so i could look, maybe try ... tnx

http://cgi.ebay.com/ebaymotors/UOBD...id=p4506.c0.m245&_trkparms=65:2|39:1|240:1318

this supports -

OBD-II Protocols:
- ISO15765-4 (CAN)
- ISO14230-4 (KWP2000)
- ISO9141-2
- J1850 VPW
- J1850 PWM

my car didnt have OBD2 so not ok?

KWP2000 isnt ODB2 only standard?

Okay, I've got the diag cable and connected it to the laptop no problems. It works great, enabling me to read codes and realtime sensor data. My car has been drinking petrol like a Spitfire so am hoping to figure out what's wrong. Here's the error codes found:

P0105 manifold absolute pressure/barometric pressure circuit

P0130 O2 sensor circuit

P0139 O2 sensor slow response

P1135 Unknown Fiat Code

P1171 Unknown Fiat Code

P1172 Unknown Fiat Code

I cleared all the faults and went for a short spin. Only code P1135 has come back.

3 Questions:

1. What is error code P1135
2. Where can I find a list of all Fiat codes
3. Does the engine fault light come on then go off if things are okay during start up. I've never seen this light come on, although the diag software indicated MIL On?

Grateful for any help and advice!

It software also said Bank 1 sensor 2 with the error

By the way, I'm using both Scantool and ScanXL ELM software if anyone is interested. Also tried Proscan but this would not connect.

nice.

so it will work on mine too? question for smarter guys - tnx in advance.

i think yeah, engine man light shuld go on if u turn on ignition - same as oil, and then turn off (so if light is broken u could notice that.) but i think, if u bought it in 2nd hand and it was like that, that previous owner maybe disconnected it so it wouldnt show off when selling .... gl anyway.

ohh, and what user u bought it from? i just would buy from same if it can/works etc. How much costed with post?

Engine management P1135 refers to an incorrect lambda sensor heater resistance on Bank 1 Sensor 1

After starting the engine, the lambda sensor should attain its minimum operating temperature as soon as possible. To shorten this period, the sensor contains a heating element which ensures that, after starting engine, the ceramic element reaches the necessary temperature after only 20-30 seconds. During operation of the engine, the heating element maintains optimum operating temperature of the component

BY TrueBlue


http://www.eksacom.ru/productlist/pages/FIAT.pdf

Stroke said:

nice.

so it will work on mine too? question for smarter guys - tnx in advance.

i think yeah, engine man light shuld go on if u turn on ignition - same as oil, and then turn off (so if light is broken u could notice that.) but i think, if u bought it in 2nd hand and it was like that, that previous owner maybe disconnected it so it wouldnt show off when selling .... gl anyway.

ohh, and what user u bought it from? i just would buy from same if it can/works etc. How much costed with post?

Click to expand...

For what they cost just buy one and try it, i would put $$ on it not working with your car though. A lot of sellers will accept them back or just put it back on ebay for a little less.

The OP's Bravo is an '01 - whereas yours is '97.

After telling me I had a rear lambda sensor fault, I did some reading and found this could also be caused by a faulty cat (manifold type from Fiat £420 ). Anyway, I did a trace of the front and rear lambdas, see attachment (hopefully!).

The green trace is the second sensor. The first sensor in red looks good alternating around 0.5v (lower than that is lean, higher is rich) as it should. The green trace runs mostly rich and jumps around a lot more during driving (the first half of the trace).

I presume the second sensor should be a fairly straight line as the mixture should have been handled by the cat by then? I'm guessing that if the cat had failed and the second sensor was okay, both traces would mirror each other? Anyone know the answer to this? I also can't see how it could be richer than the first sensor says!

Anyway, I've ordered a new sensor as this one looks very erratic. Does anyone know a cheap source for cats if the sensor fix fails? Cheapest I've seen is £240 on E-bay!

dont think u have 2 lambdas, but i am not sure (havent seen any car with 2 lambdas).

What does engine do if stays stable? and does lambda still jump around ETC. Does disconnecting lambda make it better?
catalysator shuld cost about 30£ if u take universal i think... well at least here (in Estonia ) we have universals(might be not as good, but i belive they do the work) about in that range.
do u have any leaks in the muffler that could ruin the lambda(data)?

looks like there are 2 sensors
https://www.fiatforum.com/bravo-brava/197482-engine-chek-light.html

The wifes got a TT with x2 lamda sensors

From 95-00

All petrol Bravo/a and Mareas upto 2000 (except the 1.2), have several 3 pin diagnostic connectors located on the car.

All diesel Bravo/a and Mareas upto 2000, have several 3 pin diagnostic connectors located on the car.

2001 onwards

The 1.2, 1.6 and 2.0 Fiat Bravo/a and Mareas from 2001 onwards, have a 16 pin EODB all-in-one diagnostic connector. (not sure about the 1.8, by law it should have but there is no reference to Fiat fitting it to any 1.8 Bravo).

All diesel Bravo/a and Mareas from 2001 onwards, have a 16 pin EODB all-in-one diagnostic connectors.[/QUOTE]


I have a 1997 Bravo, where can I buy this 3 pin diag cable that will goto my pc?

Diagnostics does not work

Hello,
I did not want to create a new topic about OBD, so I'am writing here.

I have ELM327 USB scanner (cheap one), also have OBD to 3PIN adapter.

Protocols:
- ISO15765-4 (CAN)
- ISO14230-4 (KWP2000)
- ISO9141-2
- J1850 VPW
- J1850 PWM

The problem is that I can not connect to car ECU

My bravo:
FIAT Bravo 1.6 16V (mkII) SX100 1999m

ECU:
Marelli IAW 49F

Can anyone give me advice?

JoskeJTD said:

The Bravo/a and Mareas are not ODBII, they are EODB however they use the universal ODBII connector. Fiat started to fit EODB connectors to cars before the auto legislation changed to make it compulsory for ODB and ODBII all-in-one diagnostic ports to be fitted to new cars (2001 petrols 2004 diesels). You can say they were one of the first. The only down side is that they used there own protocols.

From 95-00

All petrol Bravo/a and Mareas upto 2000 (except the 1.2), have several 3 pin diagnostic connectors located on the car.

All diesel Bravo/a and Mareas upto 2000, have several 3 pin diagnostic connectors located on the car.

2001 onwards

The 1.2, 1.6 and 2.0 Fiat Bravo/a and Mareas from 2001 onwards, have a 16 pin EODB all-in-one diagnostic connector. (not sure about the 1.8, by law it should have but there is no reference to Fiat fitting it to any 1.8 Bravo).

All diesel Bravo/a and Mareas from 2001 onwards, have a 16 pin EODB all-in-one diagnostic connectors.

Click to expand...

are you sure? I have Marea 1.2 2001 16v but still can't find !!

Maybe the actual changeover varied depending on country / region, or your car was an earlier build but registered later?

For later RHD cars the port connector is behind a panel in the lower dashboard, by the driver's right knee (certainly on my late-spec Brava 1.2).