How to troubleshoot no response from controller for 02 Transmission

   #1  

JohnInSeattle

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I am a newbie with VCDS but not with electronics, just need some troubleshooting help.
Working on two almost identical Beetles. 2005 and 2004, both TDI with DSG transmissions.
It works great on the 2005, diagnosed and fixed several issues with several systems, including the transmission, communicates with all the controllers.
When I connected it to the 2004 I can see all the systems except the transmission which gives the dreaded "no response from controller".
The transmission in the 2004 seems to be working but started juddering on takeoff a few days ago, hence the scan.
I already have a new camshaft position sensor on order, hoping that may be causing the juddering, certainly causing some hard starting issues.
Just need some ideas what to check on why no transmission?
I do have a scope and logic analyzer if needed.

John.

Code:
Sunday,24,March,2019,09:59:32:10819
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 10 x64
VCDS Version: 18.9.1.0 (x64)  HEX-V2 CB: 0.4437.4
Data version: 20190114 DS296.0
www.Ross-Tech.com


VIN: 3VWCR31C54M418504   License Plate: ROSIE
Mileage: 226520km-140753mi   Repair Order: 



--------------------------------------------------------------------------------
--------------------------------------------------------------------------------


Chassis Type: 1C (1C - VW New Beetle (1998 > 2010))
Scan: 01 02 03 08 15 17 19 25 29 35 37 39 46 54 56 65 75
 
VIN: 3VWCR31C54M418504   Mileage: 226520km-140753miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 038-906-016-BEW.lbl
   Part No SW: 038 997 016 M    HW: 028 101 114 7
   Component: R4 1,9L EDC G000DG  2878  
   Revision: 12345678    Serial number: VWZ5Z0D1251113
   Coding: 0150038
   Shop #: WSC 23337 444 64779
   VCID: 280905DB3EE1BF77F6D-5160

2 Faults Found:
16791 - EGR Sensor 2 
            P0407 - 000 - Signal too Low
             Freeze Frame:
                    RPM: 0 /min
                    Torque: 0.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Lambda: -7.6 %
                    Mass Air / Rev.: 1000.0 mg/str
                    Mass Air / Rev.: 0.0 mg/str
                    Bin. Bits: 00000000

19463 - Camshaft Position Sensor (G40) 
            P3007 - 000 - No Signal - Intermittent
             Freeze Frame:
                    RPM: 882 /min
                    Torque: 48.0 Nm
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Voltage: 14.21 V
                    Bin. Bits: 00001100
                    Idle Stabilization: 0.0°KW
                    (no units): 48.0

Readiness: 1 1 1 1 1 

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1C0-907-37x-ESP-F.lbl
   Part No: 1C0 907 379 M
   Component: ESP FRONT MK60      0102  
   Coding: 0019458
   Shop #: WSC 00066 000 00000
   VCID: 3431E1ABF229CB974A5-5160

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 1T0-909-605.lbl
   Part No: 6Q0 909 605 AG
   Component: 01 AIRBAG VW71      0710  
   Coding: 0012337
   Shop #: WSC 00066 000 00000
   VCID: 7CA1098B9AF9C3D7C25-5160

   Subsystem 1 - Part No: 1C0 959 339 F
   Component: BF-Gewichtsens. 006 0007

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1C0-920-x4x.lbl
   Part No: 1C0 920 951 M
   Component: KOMBI+WEGFAHRS. M73 V02  
   Coding: 11232
   Shop #: WSC 23344  
   VCID: 2B03FAD72A17946F1BF-4B1E
   3VWCR31C54M418504     VWZ5Z0D1251113

1 Fault Found:
00771 - Fuel Level Sensor (G) 
            30-00 - Open or Short to Plus

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.lbl
   Part No: 6N0 909 901 
   Component: Gateway K<->CAN    V022  
   Coding: 00006
   Shop #: WSC 00066  
   VCID: 70B92DBBC3B1B7B76ED-4B1E

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 1C0-959-799.lbl
   Part No: 1C0 959 799 G
   Component: 2K Komfortgerát HLO 0004  
   Coding: 00064
   Shop #: WSC 00066  
   VCID: 3B23CA97DA7704EF8BF-4B1E

   Subsystem 1 - Part No: 1C2959802A
   Component: 2K Tõrsteuer.FS KLO 0202  

   Subsystem 2 - Part No: 1C2959801A
   Component: 2K Tõrsteuer.BF KLO 0202  

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio        Labels: 1J0-035-18x-56.lbl
   Part No: 1C0 035 196 H
   Component:  RADIO DE2         0004  
   Coding: 06031
   Shop #: WSC 00066  
   VCID: 241111EB47C95B17DA5-51CE

1 Fault Found:
00856 - Radio Antenna 
            36-10 - Open Circuit - Intermittent

End----------(Elapsed Time: 03:54, VBatt start/end: 12.0V/12.1V)-----------
 
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   #2  

Uwe

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Since none of the other modules are fussing that the TCM is off line, the first thing I'd do is check continuity of the K-Line (that's the single-wire dedicated diagnostics "bus") from Pin 7 of the OBD-II port to the corresponding pin on the TCM (mechatronic).

-Uwe-
 
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JohnInSeattle

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Thank you.
I think this is correct, the K-Line appears to be pin 1 on the DSG plug, is that correct? is there a wire color used for it?

Not going to have time to test until Wednesday.
 
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DrPeter

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Hello,


You can verify this information in the Official Factory repair manuals and wiring diagrams.

Having a quick look at the above picture, there are a few discrepancies / modifications needed.

Pin T20/13 = [15-Powrer] (Key on power)

Pin T20/11 and T20/18 = [30-Powers] (Battery power)

Pin T20/16 and T20/19 = [Grounds]


Hope this helps,

drpeter
 
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   #5  

JohnInSeattle

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After taking out the battery and tray I was able to get to the TCM plug and test the connectivity.
Pin 1 on the TCM plug is connected to pin 7 on the ODBII port.
I tested pin 1 on the TCM and found it is connected via a diode drop (.7v) to Ground on the TCM port.
I double checked another core DSG transmission I have and it was the same.
Thinking it might have just needed a wiggle or reboot, I put it all back together and it worked.
Connected to the TCM just fine and it reported no error codes.
Whew!
If I ever get a module not talking in the future I will try rebooting first.
Thanks all.
 
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