HDI & pc based scantools

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svesey
Posts: 37
Joined: 29 Oct 2001, 06:11
Location: Ireland
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HDI & pc based scantools

Post by svesey »

I already posted this on the Citroen forum but go no replies so apologies to those who inhabit both forums.
Anyone have any luck in using a pc based eobd/obd2 scanner on a pre 2003 car with a HDI engine? Diesels didnt have to be complient until 2004 or so but some forums report that some of them are. I believe that the HDI with the edc15 ecu can be interrogated but there is some trick in initialising the interface. I also believe that the L line is used while many vehicles use only the K line.
Can anyone reccomend a tool which works on the HDI & can read & clear faults and also display live data
Thanks
rossd
Posts: 420
Joined: 16 Mar 2001, 20:18
Location: United Kingdom
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Post by rossd »

I use the Elmscan interface on mine, it works fine. I didnt have any problems with initialising anything, plugs in and works first time! :D
2003 Xsara HDi 110 - Commuting Hack

http://www.rossy.org.uk/ - 205 Track car progress
peterd
Posts: 2
Joined: 23 May 2006, 08:30
Location: Scunthorpe
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Post by peterd »

Hi,

I've just got a 1999 (September) Peugeot 406 HDI 90 and this looks interesting...

are you saying that I can get an interface (cable/plug?) and some software to run on my laptop to gain access to the in-car diagnostics?

What sort of prices and where from please?

Can you give me a basic run-through on what's involved when connecting up and what I'd be able to see and change?

Regards
Peter
svesey
Posts: 37
Joined: 29 Oct 2001, 06:11
Location: Ireland
My Cars:

Post by svesey »

Try the following sites
http://www.andywhittaker.com/ecu/obdii_hardware.htm
http://www.onboarddiagnostics.co.uk/dia ... eobd_tool/
http://www.digimoto.com

There are 2 main types of interface
1. optocoupled, using optocouplers to provide electrical isolation between the car & the laptop. More refined models also use the MAX232 chip to give proper rs232 levels to the laptop. The pc does all the work & the software used sets data rates on the serial port etc. A suitable diagnostic program is VagCom which is specifically written for VW vehicles but will work on other eobd/obd2 compliant vehicles. Release 311.2 is the last release which works with the opto cables & can be downloaded free from http://www.ross-tech.com/
2. ELM based. These use a programmed pic microprocessor to interface between the pc & the car. several diagnostic programs are available for download either free or for a small fee. The lead is usually supplied with a freeware version of a diagnostic program.

With these you can read & fault codes & clear them from the ecu thus extinguishing the fault lamp on the dash. You can also read or record live data from the engine which helps in diagnosing the problem

There are several other sites & suppliers out there
peterd
Posts: 2
Joined: 23 May 2006, 08:30
Location: Scunthorpe
My Cars:

Post by peterd »

Hi,

I've been searching the internet in the last couple of days and found the Elmscan info in the US.

Thanks for the links...these are ones that I probably wouldn't have found with a search.

It looks very interesting and will be my next 'project'.

Regards
Peter
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