Hi,
I've spent many hours trying to find out how to read fault codes from the ECU of my '97 JEA0 2.0 8V Espace.
Somewhere I found that it should be OBD compatible, which was confirmed by the presence of an OBD connector and the right pins (K-line).
So i purchased a AGV2055 OBD-Diag Interface at
www.obd-diag.de and tried to read codes.
All works fine with several different software programs, up to the point where the ECU should respond to the initial 101 command, which it doesn't (message 'Unable to connect').
Further investigation on the Internet learned that my car isn't OBD compatible after all, since it has an F3R 728 engine instead of a F3R 768 (so I read....), even though both should have the same Siemens Fenix 5 ECU.
Now this Fenix 5 ECu is used in many other cars, also non-Renault, and (general) specificactions found on the Internet about it suggest it must be ISO 9141-II compatible.
Specs of my AGV2055 OBD-Diag Interface of
www.obd-diag.de suggest that it supports this protocol.
Still, no data can be read with it from my car.
I then let the matter rest a bit, until my airbag system started to show 'service' on the display two weeks ago.
I've had this before and replaced the connectors of the belt tensioners with a soldered connection which helped.
This time I've checked the connectors on the tensoiners underneath the seats themselves and also the one on the steering wheel airbag.
Also I had a look at the airbag computer underneath the driver seat and gave it a bit of W40 contact spray and wiggled it a bit.
Doesn't help.
Either it's another connector somewhere else or a component is really defective (airbag computer, an airbag or a tensioner).
Finding out by trial and error is very time consuming and doesn't garrantuee succes.
I'd like to see if the ECU gives a fault code that indicates which component is defective (or badly connected).
So I picked up the idea of reading fault comes again...
Again i spend many ours on the Internet trying to find information.
However, without help I don't think i can get any further.
So I have these questions:
Is there any software I can use on my laptop that WILL work on my car?
If so, how to get it? (CLIP? which version? where to get it? what else needed? Special cable?)
What are the 'commands' to be sent to the ECU? I used to be a programmer many years and think I will be able to make a little program to do the job, If I can get hold of the necessary information.
Will any of this work with the OBD interface I have, or do I need another one?
If so, where can I get it, or: please supply me the schematics so I can build one.
If anybody helps me to get going with solving this problem, I will of course post any progress on this forum.
Many thanks.
Mark Nessen