dgpach

Hi Dana, I need help with one more question. The Scan shows am incorrect engine code (06652 which is for a vehicle without ESP) My Audi has ESP. When I consult Bentley, it shows my engine code (ART) as a 2.8L V6 (electrical wiring manual page ST33) and Ross Tech Wiki doesn't show any V8's.

What I have is a 2000 4.2L V8 ART with 5 speed Tiptronic auto trans, quattro with ESP, C Class (C5) Would the correct code be 06752?

Thanks

Uwe@Ross-Tech.com

Please post up a complete Auto-Scan. I could be wrong about this, but there I don't think ESP existed in MY 2000.

-Uwe-

dgpach

Uwe, I can do that tomorrow. I changed the ECU code to reflect ESP and it made the car happy ( e.g. the ESP control lamp and the DTC 01044 disappeared) MY ABS code remained unchanged from 06397. My car might be a little wierd (I'm not the original owner) as it has an S6 badge but not the suspension and other? upgrades. This is why it would have been better if I had a previous coding printout, but this wasn't possible.

dgpach

Uwe, Auto scan data is below. Everything came up clear after I changed the engine code. Since then I replaced the interior sensor module and the link connection was again lost. Vag Com was comminicating with the modules as I could hear the warning beep etc, but no data was returned to the PC screen. Once I umplugged the sensor, full communications were restored with the addition of the 18256 code (I saw the ather post about this code). The full output of the scan is: (do I have it right?)

THANKS

VCDS Version: Release 908.1
Data version: 20091018

Wednesday,03,March,2010,15:55:27:30212

Chassis Type: 4B - Audi A6 C5
Scan: 01 02 03 06 08 15 16 17 18 34 35 36 37 45 55 56 57 65 67 75
76 77

-------------------------------------------------------------------------------
Address 01: Engine Labels: None
Part No: 4D0 907 558 S
Component: 4.2L V8/5V G 0006
Coding: 06752
Shop #: WSC 02387

No fault code found.
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 02: Auto Trans Labels: 01L-927-156.lbl
Part No: 4B0 927 156 BS
Component: AG5 01L 4.2l5V USA 1414
Coding: 00032
Shop #: WSC 22145

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8D0-907-389.lbl
Part No: 8D0 907 389 E
Component: ABS/ESP allrad D36
Coding: 06397
Shop #: WSC 02325

1 Fault Found:
18256 - Please check DTC Memory of Engine Controller
P1848 - 35-10 - - - Intermittent

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 4B0-820-043-MY1.lbl
Part No: 4B0 820 043 L
Component: A6-Klimavollautomat D64
Coding: 00180
Shop #: WSC 02325

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 4B0-959-655-AI8.lbl
Part No: 4B0 959 655 F
Component: Airbag Front+Kopf 1002
Coding: 00304
Shop #: WSC 02325

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 4B0-907-487.lbl
Part No: 4B0 907 487
Component: E Lenkrad Elektronik D03

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 4B0-920-xxx-17.lbl
Part No: 4B0 920 980 M
Component: C5-KOMBIINSTR. VDO D10
Coding: 03283
Shop #: WSC 00000

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 4B0-962-258.lbl
Part No: 4B0 962 258 J
Component: Central Lock/Alarm D33
Coding: 15949
Shop #: WSC 22145

No fault code found.

-------------------------------------------------------------------------------
Address 36: Seat Mem. Drvr Labels: None
Part No: 4B0 959 760 A
Component: Sitzmemory D05

No fault code found.

-------------------------------------------------------------------------------
Address 37: Navigation Labels: Redir Fail!
Part No: 4B0 919 887 A
Component: Navigation 0001

1 Fault Found:
65535 - Internal Control Module Memory Error
00-00 - -

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4B0-907-357-DYN.lbl
Part No: 4B0 907 357 C
Component: dynamische LWR D02
Coding: 00020
Shop #: WSC 02325

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: 8D0-035-1xx-56.lbl
Part No: 4B0 035 195 A
Component: Radio D00
Coding: 00201
Shop #: WSC 00003

No fault code found.

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

Uwe@Ross-Tech.com

Yeah, there's not much we can do about a bad module choking up the diagnostic bus. The 18256 DTC in the ABS should clear now, since it's flagged "Intermittent".

I'm still a bit surprised to find an ABS/ESP in this car, but I can't argue with the scan. Are you sure this car is a model year 2000? If you don't mind check the 10th digit of the VIN, I'm sorta curious.

-Uwe-

dgpach

Thanks Uwe, The 10th digit is the letter Y Car was built 11/99. Also I wasn't clear, the interior motion sensor module I put it was a different one than I originally removed. So two modules cause the same link problem. Does this mean there's a problem in the K wire or does this expose a problem in the central locking module?

What do you think? Thanks,

Don

Uwe@Ross-Tech.com

OK, that's definitely a MY 2000, and I'm surprised to see an ESP capable system in it, but hey..

If I understand correctly, you're having connection issues every time you install an Interior Monitoring module. I wish I had an answer for you as to what the most likely cause is, but I do not. Have you verified good power and ground at the plug for the that module? Some modules can choke the bus if either power or ground is missing.

-Uwe-

Peter Badore

With a defective control module as you say "choking" the k line, would the voltage
be at pin 7 and ground of the OBD2 port indicate anything abnormal? Also, does each diagnostic capable control module independently generate its own voltage at 1 to 9 volts for connection to the K line pin 7?

Uwe@Ross-Tech.com

Technically, all the devices on the K-line use an "Open Collector" type output, meaning all the should be capable of doing is pulling the K-line to ground. It is the scan tool's job to provide a pull-up resistor.

This means the voltage on the K-line without a scan-tool connected is indeterminate, because none of the the module's outputs should be driving it low, but there will always be some small leakage current and the amount and direction of this leakage current will determine the open-circuit voltage.

-Uwe-

Peter Badore

So if I understand your answer correctly if each control module connected on the k line were operating perfectly
with no leakage then the k line would show 9 volts between pin 7 and pin 4? And the more control module leakage the lower the voltage between pin 7 and ground pin 4?