General: - How does the OBD work? - Page 2

bournricha · Dec 26th, 2015, 10:49

Thanks KBB ,very informative .
Agree entirely over the nature of the fault .
The fuel trim being out of range high and low is, I believe, a classic sign of a fault with the maf .Cleaning will not correct if it genuinely faulty .Also have a look for bad /loose connections as a varying resistance could be causing problems ,but my money would be on the maf .

Bernard46 · Dec 26th, 2015, 16:54

Thanks for the feedback guys. Could I ask Chris if the very informative DTC code info he provided pointers for is Volvo specific or is it generic - I'm just curious. It's great information and I would really like to know its pedigree for future reference. I've never seen anything like this before.

KBB provided some great analysis and diagnostic info in my other post and I'm going to follow this up asap - may take a few days due to weather and holidays but I will follow up and post the results as soon as I have something to report.

Bernard

Chris_Rogers · Dec 26th, 2015, 17:30

The DTC info is generic.

Bernard46 · Dec 26th, 2015, 19:38

I thought that was probably the case, but it is good to know for certain. It's very useful information - many thanks for pointing it out.
Bernard

Bernard46 · Dec 26th, 2015, 23:39

Quote:

Originally Posted by Simon Jones

If you get a copy of VIDA and a DICE unit then you will have full access to the same diagnostics as a main dealer. For about £70 - £90 (plus a laptop) you get all the live data you could possibly want.

I'm very dubious about these - I see so many tales of people having problems trying to get them to work. Have you actually been able to use one successfully? and if so would you recommend any particular vendor?

Simon Jones · Dec 27th, 2015, 11:19

I bought mine second hand off a forum member so I had some confidence that it has been used sucessfully. I've since used it on a number of cars (mine and other owners) and it really is the only bit of kit that will communicate to all the onboard systems

Bernard46 · Dec 27th, 2015, 14:57

OK thanks, I'd like to hear from anyone who has successfully bought one from the web and not had a shed load of problems getting it to work, and/or had to pay a fortune in customs duties because it came from China/Hongkong.

Simon Jones · Dec 27th, 2015, 20:57

19 pages containing info on people who have sucessfully done the same: http://www.volvoforums.org.uk/showthread.php?t=136759

Backo · Dec 28th, 2015, 22:20

A little snippet on how DTC are generated and stored.
Counters can be particularly useful.

Bernard46 · Dec 29th, 2015, 17:39

Thanks, Interesting - looks like useful information on just how prevalent a problem is, but I'll need to get my head down and work through it slowly to make sure I understand it all.

What tool would one need to see the Status Identifier and Counter values - my Creader vi does not seem to do this - would only VIDA/DICE do it?

Dec 26th, 2015, 10:49	#11
bournricha bournricha Last Online: Jan 10th, 2017 22:14 Join Date: Jan 2014 Location: oban	Thanks KBB ,very informative . Agree entirely over the nature of the fault . The fuel trim being out of range high and low is, I believe, a classic sign of a fault with the maf .Cleaning will not correct if it genuinely faulty .Also have a look for bad /loose connections as a varying resistance could be causing problems ,but my money would be on the maf . __________________ 1991 940 estate 2.3 125,000m.Under overhaul Previous convictions ;s70 ,855t5,745,v70, v70p2

Dec 26th, 2015, 16:54	#12
Bernard46 Member Last Online: Apr 21st, 2016 19:49 Join Date: Dec 2008 Location: Leamington Spa	Thanks for the feedback guys. Could I ask Chris if the very informative DTC code info he provided pointers for is Volvo specific or is it generic - I'm just curious. It's great information and I would really like to know its pedigree for future reference. I've never seen anything like this before. KBB provided some great analysis and diagnostic info in my other post and I'm going to follow this up asap - may take a few days due to weather and holidays but I will follow up and post the results as soon as I have something to report. Bernard

Dec 26th, 2015, 17:30	#13
Chris_Rogers VOC Member Last Online: Apr 10th, 2017 16:55 Join Date: Jan 1970 Location: South Kent Coast	The DTC info is generic.

Dec 26th, 2015, 19:38	#14
Bernard46 Member Last Online: Apr 21st, 2016 19:49 Join Date: Dec 2008 Location: Leamington Spa	I thought that was probably the case, but it is good to know for certain. It's very useful information - many thanks for pointing it out. Bernard

Dec 27th, 2015, 11:19	#16
Simon Jones Premier Member Last Online: May 29th, 2024 06:32 Join Date: Feb 2009 Location: Salisbury (ish)	I bought mine second hand off a forum member so I had some confidence that it has been used sucessfully. I've since used it on a number of cars (mine and other owners) and it really is the only bit of kit that will communicate to all the onboard systems

Dec 27th, 2015, 14:57	#17
Bernard46 Member Last Online: Apr 21st, 2016 19:49 Join Date: Dec 2008 Location: Leamington Spa	OK thanks, I'd like to hear from anyone who has successfully bought one from the web and not had a shed load of problems getting it to work, and/or had to pay a fortune in customs duties because it came from China/Hongkong.

Dec 27th, 2015, 20:57	#18
Simon Jones Premier Member Last Online: May 29th, 2024 06:32 Join Date: Feb 2009 Location: Salisbury (ish)	19 pages containing info on people who have sucessfully done the same: http://www.volvoforums.org.uk/showthread.php?t=136759

Dec 29th, 2015, 17:39	#20
Bernard46 Member Last Online: Apr 21st, 2016 19:49 Join Date: Dec 2008 Location: Leamington Spa	Thanks, Interesting - looks like useful information on just how prevalent a problem is, but I'll need to get my head down and work through it slowly to make sure I understand it all. What tool would one need to see the Status Identifier and Counter values - my Creader vi does not seem to do this - would only VIDA/DICE do it?

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