Unable to read block 50

[newbs]

hi, new user
had unregistered lite for a while, works well, reads codes and blocks up to about block 20

i'm chasing a hot start issue, which may be due to a flakey cam sensor. (after standing for 10 minutes after being fully up to temperature, it has a long crank, when cold it fires up almost instantly, its quite repeatable)

I bought a registered version to look at the crank and cam signals when its doing the long crank thing, these are held in block 50 of full VCDS, there are a few threads on tdiclub showing VCDS screen shots

but I cannot display block 50, I get a message saying unable to display,
any idea how I can look at the crank and cam speeds?
vehicle is 2002 Audi A3, 1.9TDI, with PD engine, AZS I believe, 130 hp

thanks in advance

[Uwe]

Please post an Auto-Scan so we can see exactly what ECU you have.

-Uwe-

[newbs]

indeed, i thought you might ask, two known faults, loudspeaker open circuit and alarm horn no comms

VCDS-Lite Version: Release 1.2
Thursday, 18 October 2018, 17:24:57:14371


Chassis Type: 8L - Audi A3/S3
Scan: 01,02,03,08,15,16,17,22,35,37,45,55,56,57,75,76
 
-------------------------------------------------------------------------------
Address 01: Engine       Labels: 038-906-019-ASZ.LBL
   Controller: 038 906 019 FT
   Component: 1,9l R4 EDC 0000SG  1527
   Coding: 00002
   Shop #: WSC 06435
   VCID: 6EAF7598398F
   WAUZZZ8LX2A074665     AUZ5Z0B2237042
No fault code found.
Readiness: N/A

-------------------------------------------------------------------------------
Address 03: ABS Brakes       Labels: None
   Controller: 1C0 907 379 G
   Component: ESP FRONT MK60      0101
   Coding: 0019970
   Shop #: WSC 06435
   VCID: 2E2FB598F90F
No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC       Labels: Redir Fail!
   Controller: 8L0 820 043 H
   Component: A3  KLIMAAUTOMAT   0105
   Coding: 00041
   Shop #: WSC 06435
   VCID: 2D2DB294F409
No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags       Labels: 8L0-959-655-AI8.LBL
   Controller: 8L0 959 655 L
   Component: Airbag Front+Seite 7008
   Coding: 01104
   Shop #: WSC 06435
   VCID: 47E1E03C76B5
No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments       Labels: 8L0-920-xxx-17.LBL
   Controller: 8L0 920 950 D
   Component: KOMBI+WEGFAHRS. M73 D03
   Coding: 04440
   Shop #: WSC 00000
   VCID: 3115AEE4E831
   WAUZZZ8LX2A074665     AUZ5Z0B2237042
No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks       Labels: 8D0-862-257.LBL
   Controller: 8D0 862 257 E
   Component: CV-Pump, Alarm, RC  D17
   Coding: 15178
   Shop #: WSC 06435
   VCID: 2F11A89CFE05
1 Fault Found:
01134 -  Alarm Horn (H12)
            49-00 -  No Communications

-------------------------------------------------------------------------------
Address 45: Inter. Monitor       Labels: 4B0-951-173.LBL
   Controller: 4B0 951 173 
   Component: Innenraumueberw.    D03
   Coding: 00001
   Shop #: WSC 00000
   VCID: E0B39BA0735B
No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio       Labels: 8E0-035-1xx-56.LBL
   Controller: 8L0 035 186 G
   Component: concert II  GRO    0008
   Coding: 00001
   Shop #: WSC 06435
   VCID: 3217A1E8ED37
1 Fault Found:
00852 -  Loudspeaker(s); Front
            36-00 -  Open Circuit

End   --------------------------------------------------------------------------------------------------

[Uwe]

So what makes you think that this ECU should have an MVB Group 050?

-Uwe-

[newbs]

i have seen threads in other forums where users with vcds have been looking at block 50 to see the crank and cam speeds, on similar engines
/m

[Uwe]

i have seen threads in other forums where users with vcds have been looking at block 50 to see the crank and cam speeds, on similar engines
/m

"Similar Engines" doesn't mean much.

Got a link to such a thread?

-Uwe-

[newbs]

sorry for the late response

the thread I was looking at was referencing a BEW engine, but from 2003. although this is "similar" in that its a PD engine and this wicki puts them as the same general type (https://en.wikipedia.org/wiki/List_o...diesel_engines), it is unlikely that thy will have the same MVB's, as the BEW seems to be a good few years later than the AZS.

is there a list of available MVB's for each engine?

I think I may have found the issue as I managed to catch one of the long crank events whilst logging, showed up no engine speed in MVB 01, but there was an engine speed registering when it was cold.

[Uwe]

the BEW seems to be a good few years later than the AZS.

Right, and built to a totally different regulatory standard.

is there a list of available MVB's for each engine?

What's in a label file such as the one VCDS is using for your engine (038-906-019-ASZ.LBL) is generally everything that VW had documented for that engine, plus possibly some additional info that users have documented.

-Uwe-

[newbs]

thanks Uwe
I think I may have been misdirected on the diagnosis

when cranking, the engine speed was zero because the comms to the ecu stopped during the crank time amd started again when the cranking stopped.

I just just ran a ttest where I unplugged the trigger wire to the starter, put the key in crank position and coms are ok i.e. the ecu was receiving power when key was in crank

this suggests a voltage drop during the crank is doing something to the ecu, have you seen this before?

just off to check power and grounds to the ecu