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Audi A6 1998-2004, S6 2002 and later, allroad 2001 and later, rs6 2003 and later (C5) VAG Catalytic measuring blocks vs. Bentley Threshold/Specified Values


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Last Post: Oct 8, 2013 12:04 PM Last Post By: Charlie
ajg617

Posts: 11
Registered: 02/16/07
VAG Catalytic measuring blocks vs. Bentley Threshold/Specified Values
Posted: Sep 21, 2013 9:53 AM
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I am trying to figure out the relationship between the VCDS measuring block values and the Threshold values or specified values in Bentley. 03 Audi A6 with 3.0L and the codes are 16805 and 16815. If I'm reading my VCDS docs correctly, measuring block 46 and 47 catalytic conversion values should be less than .58 when I mouse over that area. Just as an aside, logging the 47 and 48, Bank 1 is .79 and Bank 2 is .31 but both are throwing codes.

Reading the P0421-31 code specs in Bentley, it says Threshold Value should be less than .3. Then if I go to Three Way Catalytic Conversion checking section for AVK engines, there is a nice little table that provides a minimum and maximum "specified value" for Catalytic Conversion (0.2031 to 0.8516) under diagnostic function 33, Mode 5, TestID 01 - Catalytic Converter.

Any clarification would be appreciated as it seems like I'm looking at three different measurements. Iím also confused with Bentleyís diagnostic function 33. Is that the same as measuring block 33? If so, Iím confused on what exactly diagnostic function 33 measures vs. measuring blocks 46 and 47. According to Ross Tech, 33 is a generic measuring block used differently by different vehicles. If Bentley is correct, both my Cats should still be under threshold.
Charlie

Posts: 4,776
Registered: 12/09/03
Re: VAG Catalytic measuring blocks vs. Bentley Threshold/Specified Values
Posted: Oct 8, 2013 12:04 PM   in response to: ajg617 in response to: ajg617
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Unfortunately, I am not well versed in Measuring Blocks. Are you sure you are looking at the warm up cats? This thread may be worth looking at: http://tech.bentleypublishers.com/message.jspa?messageID=374763

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