OBD scantool & HDI

svesey · Post by **svesey** » 17 May 2006, 01:08

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.

Bassrock · Post by **Bassrock** » 01 Mar 2007, 20:27

Hi,

I've been trying for some time to get my car to speak, 2001 HDi diesel BOSCH EDC15C2 ECU

tried ELM323 with scantool
tried U381 form UIFTECH

only success I've had is in downloading ECU MAP data with a KWP2000 flash device.

So either Citroen for our particular case have a "variation" of the protocol OR kicking the K and L lines in order to initiate comms not sure.

Would like to hear from you as you are obvioulsy battering your heed aff the same brick soddin wall as me.

bernie · Post by **bernie** » 01 Mar 2007, 20:45

I've got a PC based unit that works on my Xantia

http://www.ukobd.co.uk/gstore/store/g_v ... dProduct=5

Bassrock · Post by **Bassrock** » 01 Mar 2007, 21:10

Bernie,

Mmmmmm

I take it the software and interface are that as described in link !
so its using DIGIMOTO and ISO, my U381 reader fails to read ISO and KWP200, fault code side that is, however I ain't tried Digimoto with the ELM323, right give that a bash

It's just crackin the fault code and live engine datra signals !

Simple eh ?

Cheers
Bassrock

KevMayer · Post by **KevMayer** » 08 Mar 2007, 20:49

Today I got a U480 fault code reader that I purchased from ebay.

I've tried it on 5 cars.

My C5 2.2 Hdi ...... didn't work
Audi A4 2.5 tdi......... worked ok using KWP2000 protocol
Saxo 1.1 July 2000......... worked ok using KWP2000
Saxo 1.1 January 2000...... didn't work
Corsa 1.4 2004......... worked ok using KWP2000

As far as I can find out, the C5 uses ISO9141-2 protocol. The U480 can read ISO but fails with the C5.

cheers,

Kev

Bassrock · Post by **Bassrock** » 08 Mar 2007, 22:18

Kev,

Ok, so were at the same point, what have Citroen done, they must have tweaked some "BIT" somewhere or are using a variation on the protocol, their workshop diagnostics can read the data "lexia" kit, if that can read it and other manufacturers kit can read it,. Aaaaaaaargh ???

Anyway U381 managed to read 3 Mondeo TDCi's PWM prot with live data, 54,55 and 56 plates.

Still diggin

Bassrock

Brian UK · Post by **Brian UK** » 08 Mar 2007, 23:42

Have a look at the pins on the car connector socket, and see which ones have connectors.
For ISO there should be 5 7 16 and possibly 15 which is optional. I have also read in another forum of pin 4 being present.
If, as is possible, you don't have pin 15 there, one person said that they had to connect pins 7 & 15 together on the plug to get it to work.
Generally it appears that all the units with Bosch injection are compliant, but those with Siemens may not be until end 2003
See this discussion.
http://www.dieselcar.com/cgi-bin/yabb/Y ... 1173261130

KevMayer · Post by **KevMayer** » 09 Mar 2007, 18:34

Thanks for the link Brian.

Interesting to see that the ELM 327 doesn't work. I thought this may have been the device to use because the 327 chip seems a lot more sophisticated than the ELM 323. Bassrock has tried an ELM323 and it doesn't work on the C5.

Linking pins 7 and 15 may be worth a try. 7 is the bidirectional data K line. 15 is the unidirectional data L line. (only recently found this out after reading loads of stuff on the net to try to understand the OBD2 connection).

My C5 OBD2 port doesnt have a connection on pin 15 but maybe the fault code reader works better with an input at this pin. I'll try it and let you know what happens.

cheers, kev

Brian UK · Post by **Brian UK** » 10 Mar 2007, 00:44

Several others have said the same today on the other forum. Problem is on the ELM, that the plug is part of the unit, and if you go in and short those pins, it might then not work on another car. I suppose it might be possible to add a miniature switch.

KevMayer · Post by **KevMayer** » 14 Mar 2007, 20:20

Update.

I linked pins 7 and 15 on my U480 fault code reader... tried it on my C5 2.2 Hdi (2002 plate) .... and.......IT DIDN'T WORK !

Linking the pins failed.

Back to the drawing board.

cheers, Kev

rossd · Post by **rossd** » 15 Mar 2007, 10:47

Of the 4 HDi equppied cars I have owned, 2 have worked with my ELM 323 and 2 have not.

1999 306 HDi - Worked. Codes + some live data
2001 406 HDi - Worked. Codes + More data than 306.

2002 206 HDi - Bus Init Error*
2003 Xsara HDi 110 - Bus Init Error

They all have the EDC15C2 ECU, so something has changed somewhere, I'm wondering if the introduction of the MUX wiring has something to do with it?!

*Those with an ELM will know what this means. In essence it wont connect to the ECU.

Tony589 · Post by **Tony589** » 16 Mar 2007, 07:56

I have an ELM327 and with Scantool software it will talk to my 2001 Hdi Xantia, letting me read some live data such as speed, RPM, temps etc. I can also read and reset fault codes.

Tony.

KevMayer · Post by **KevMayer** » 17 Mar 2007, 22:41

I've emailed several suppliers of fault code scanners to ask which devices they could recommend for the 2.2 Hdi 2002. I've had one reply so far which is as follows:-

"
Kevin,
Your 2.2 hdi, (EDC15C2), does not support EOBD/OBDII standard, as EOBD was not implemented on diesels until 2004.
Unfortunately this means that the really cheap scanners won't read your car. You need to look at the more expensive range of scanners, which are probably going to be around the £1000 range plus.
Check ebay for scanners like snap-on etc. The reality is there is not a cheap solution.
Sorry..
Regards Mark. "

So, I'm confused. If scanners worked on earlier Hdi cars, 1999 to 2001, then I don't know why they won't work on a 2002 Hdi.

I've looked at Snap-On scanners on ebay and they're several hundred pounds.

I suppose we just need to keep looking !

cheers, Kev

cyber-shot · Post by **cyber-shot** » 01 Aug 2007, 20:09

Hi tried a U480 on my 2001 110 hdi got the not connected message worked ok on a 90hp xsara and a 306 2000 hdi.
has anybody tried the ELMSCAN 5 seems to use every protocol

rossd · Post by **rossd** » 04 Aug 2007, 08:36

Odd, so there is definatly a trend forming here; It works on the earlier HDi's but not the later models.
The only physical change I can see on the ECU is from when they went from the single loom connector on the ECU to 3 small connectors; this seems to be the point they stop working!

(I'm talking about the EDC15C2 here as used on the HDi's)

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