Resolved 2005 VW Beetle J706 error

[rvralph64]

Hi, I am having trouble tracing the no signal issue with this beetle. Please see auto scan below. The actuator error is not a concern at this time and I know what to do to fix it.

Thanks

Saturday,29,March,2025,12:49:12:07661
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 11 x64
VCDS Version: 25.3.0.4 (x64)  HEX-V2 CB: 0.4660.4
Data version: 20250311 DS365.0
www.Ross-Tech.com


VIN: 3VWCD31Y85M316819   License Plate:


Chassis Type: 1Y (1Y - VW New Beetle Cab (2003 > 2010))
Scan: 01 02 03 08 15 17 19 25 26 29 35 37 39 46 54 56 65 75
 
VIN: 3VWCD31Y85M316819   Mileage: 117800km-73197miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 06A-906-032-BKF.lbl
   Part No: 06A 906 032 QS
   Component: 1.8l 5VT NBC AG6G   6481 
   Coding: 00004
   Shop #: WSC 00066 
   VCID: 7F5B13D5DEECA222F6D-513C
   3VWCD31Y85M316819     VWZ5Z0D9051151

No fault code found.
Readiness: 0110 1101

-------------------------------------------------------------------------------
Address 02: Auto Trans        Labels: 09G-927-750.clb
   Part No: 09G 927 750 AN
   Component: AQ 250 6F           0609 
   Coding: 0000008
   Shop #: WSC 00000 000 00000
   VCID: 7DA7E9DDD1E0B032E41-513C

No fault code found.

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1C0-907-37x-ESP-F.lbl
   Part No: 1C0 907 379 M
   Component: ESP FRONT MK60      0102 
   Coding: 0019970
   Shop #: WSC 00066 000 00000
   VCID: 34310CF9A22AB17A5BF-5160

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 1T0-909-605.lbl
   Part No: 6Q0 909 605 AF
   Component: 01 AIRBAG VW71      0609 
   Shop #: WSC 00066 000 00000
   VCID: 7BA3E7C5CFF4BE02DA5-5160

1 Fault Found:
02511 - Control Module for Seat Occupied Recognition (J706)
            004 - No Signal/Communication

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1C0-920-x4x.lbl
   Part No: 1C0 920 951 N
   Component: KOMBI+WEGFAHRS. M73 V02 
   Coding: 11234
   Shop #: WSC 00000 
   VCID: 2C0114997F1AE9BA03F-4B00
   3VWCD31Y85M316819     VWZ5Z0D9051151

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.clb
   Part No: 6N0 909 901
   Component: Gateway K<->CAN    V022 
   Coding: 00006
   Shop #: WSC 00066 
   VCID: 70B9C0E993B2CD5A7F7-4B00

No fault code found.

-------------------------------------------------------------------------------
Address 26: Auto Roof        Labels: 1Y0-959-255-HYD.lbl
   Part No: 1Y0 959 255
   Component:  VSG  NBC           3405 
   Shop #: WSC 00000 000 00000
   VCID: 7DA7E9DDD1E0B032E41-513C

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 1C0-959-799.lbl
   Part No: 1C0 959 799 G
   Component: 6J Komfortgerát HLO 0004 
   Coding: 00256
   Shop #: WSC 00066 
   VCID: 3B2327C58A747E029A5-4B00

   Subsystem 1 - Part No: 1Y1959801C
   Component: 6J Tõrsteuer.FS KLO 0005 

   Subsystem 2 - Part No: 1Y1959802D
   Component: 6J Tõrsteuer.BF KLO 0005 

   Subsystem 3 - Part No: 1Y0959811
   Component: Tõrsteuer.HL KLO 0005 

   Subsystem 4 - Part No: 1Y0959812
   Component: 6J Tõrsteuer.HR KLO 0001 

1 Fault Found:
00929 - Locking Module for Central Locking; Front Passenger Side (F221)
            27-00 - Implausible Signal

End----(Elapsed Time: 03:53, VBatt start/end: 11.9V/11.9V. VIgn 11.9V)-----
------------------------------2 Faults Found-------------------------------

 

[Uwe]

I am having trouble tracing the no signal issue with this beetle.

Tell us what you've done to "trace" it so far...?

-Uwe-

 

[rvralph64]

Hi Uwe,

I visually inspected the wiring harness under the seat and the connector. I don't see any signs of damaged wiring or the connector being damaged. I did check for power and one of the wires had power.

 

[rvralph64]

Does anyone one have the values for each lead on the J706 connector so I know what I'm looking for?

Thanks

 

[Bruce]

The cost of access to wiring diagrams is low. Please go to erWin to get access for a day for $35 and download all the stuff for your car onto a flash drive.

 

[Dr Sheldon]

The cost of access to wiring diagrams is low. Please go to erWin to get access for a day for $35 and download all the stuff for your car onto a flash drive.

Good advice there but

I did check for power and one of the wires had power.

Check for ground while you were there ??

I have a feeling that may have a data line(s) - Linbus possibly ?


Those seat Recognition sensors fail for fun !!

 

[rvralph64]

The cost of access to wiring diagrams is low. Please go to erWin to get access for a day for $35 and download all the stuff for your car onto a flash drive.

Thanks Bruce and I will do that!!

 

[rvralph64]

Good advice there but

Check for ground while you were there ??

I have a feeling that may have a data line(s) - Linbus possibly ?


Those seat Recognition sensors fail for fun !!

Dr Sheldon, yes I will certainly check for ground. Thanks!!

 

[Apendiixator]

02511 - Control Module for Seat Occupied Recognition (J706) 004 - No Signal/Communication

Does this error appear immediately after deletion? Or does the error have to be preceded by some typical situation?

 

[rvralph64]

Immediately after clearing the code. When I swap out seats, I always strip out anything that can be used later. I have a stash of J706 modules with the wiring harness and I thought perhaps this car had a bad cable harness under the seat but after swapping out modules and harnesses I figured I better check the wiring going back from the seat to the car itself. It's not the first time I have encountered this problem but this is the first time I get "no signal/communication" error. I also noticed that when I enter the security code it won't allow me to enter "basic", it remains grayed out.

 

[rvralph64]

I meant "basic settings".

 

[Apendiixator]

I enter the security code it won't allow me to enter "basic", it remains grayed out.

I have a feeling that there is no space for basic settings in module 15. The shortcut is not the reason.

 

[Apendiixator]

Immediately after clearing the code. When I swap out seats, I always strip out anything that can be used later

Focus on the connectors that are under the seat. That is, not the ones under the floor carpet. The connector under the seat is best bridged with a 100% electrically conductive connection. Or have you already done this?

 

[rvralph64]

No, I haven't tried that yet but it makes sense. Bridge it by hard wiring it or replace the connector?

 

[Dr Sheldon]

No, I haven't tried that yet but it makes sense. Bridge it by hard wiring it or replace the connector?

Why not check continuity through the connector before lashing it up ? Those wires carry minimal current !

 

[rvralph64]

Yes, makes sense. I will connect it to the harness and check for continuity from the car side to the module side. I believe one wire had battery voltage so I will check to see if the voltage passes through to the module side. I will let you know in a couple days when I get a chance to work on it again.

Thanks!

 

[rvralph64]

Ok. This is what I know. There is continuity across the connector and I even checked the harness from under the seat for continuity. There appears to be no broken wires. I even tried a spare seat I had and got the same results. So two different seats, with two different harnesses and even swapping out modules gave me the same results. I'm going to check the wiring under the carpet.

 

[Dr Sheldon]

You have gained access to both the Module and the Recognition Sensor ?

Why not check continuity from the Module Connector through to the Sensor Connector ??

And then Drag test the female sockets in the connectors ? They should have sufficient tension to "Grab" the Male Pins.

So two different seats, with two different harnesses and even swapping out modules gave me the same results.

Swapping Old Modules & Sensors about is not a "Test" - Hence drawing conclusions from that exercise is not a worthwhile diagnosis !!

 

[rvralph64]

Yeah, I had a feeling you would say that about swapping out parts. Ok, I will do further tests through the connectors.

 

[Dr Sheldon]

Yeah, I had a feeling you would say that about swapping out parts. Ok, I will do further tests through the connectors.

What I suggested was

check continuity from the Module Connector through to the Sensor Connector ??

And then Drag test the female sockets in the connectors ? They should have sufficient tension to "Grab" the Male Pins.

That is End to End testing !!