Vag-com 2x2

[trebormc]

Hi does any one know what the 8 measuring blocks are on a ur quattro 20v rr engine?

[SteveH]

They will be the same as the 3B S2 as they share the same ECU.

[trebormc]

The 3b ecu has 10 measuring blocks but the rr has only 8.

[twoqu]

Post a screen shot of the measuring blocks so we can see the values . Might make it easier to work out which ones are what.
Guess its possible that Audi added more later for the 3b.

[trebormc]

1 voltage 185
2 air temp 65
3 engine temp 90
4 a/c (i think) 28
5 (i don't know) 253
6 (i don't know) 4
7 lambda 160
8 throttle angle 5-205
this is what i have worked out so far.

[twoqu]

Think you are a bit far off!

[trebormc]

Hi mate that is from a 3b ecu the ecu that i have got repeats it's self after number 8.

[twoqu]

Its only to guide you for what the range of the numbers is and what they relate to.
For example 185 is the coolant temperature (85C) etc. Not sure why you deduced that 185 is related to voltage!
So you will have to look at the ranges and see if any fit your readings. The ecu's are similar but the SW is not identical. Not having seen the measuring blocks from an RR you will have to make an educated guess.
The figures are for a warm (85C+) runing engine. You can slightly increase engine revs and see what values change. Again that might give you a clue. Unfortunately the earlier Motronic does not have extensive measuring block info.
As for the repeating perhaps Audi decided not to use some of the available channels and just duplicated some readings to fill the blocks. So you do have the 10 blocks but the last two are duplicates of one or other of the previous 8. Which ones are duplicated? I have always thought that 4 blocks devoted to the idle was excessive but perhaps its more to do with increasing emissions standards. Just a theory!

[trebormc]

Thanks mate.

[trebormc]

Hi to all,just got myself a aby ecu and bench tested it.i have noticed the the ecu has only 8 measuring blocks and thay the same as the rr ecu,has any one else have test the blocks to see what thay do?