005687 - Powertrain Data Bus P1637 - 000 - Missing Message from Electric Load Controller

   #1  

IsaacL

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Hi

Haved VCDS for a few years professional and a lot of experience in the repair of most euro vehicle electrical systems and this is the first time posting here.

2007 VW transporter 7HO
Engine ECU
fault code 005687 - Powertrain Data Bus
P1637 - 000 - Missing Message from Electric Load Controller
Only other fault is aftermarket radio. Fault is present with radio connected or disconnected

There is no direct connection for "powertrain can bus" to the Electric Load controller(J519). CAN bus for J519 is on convenience CAN BUS and is connected to CAN gateway.
All installed modules on 'convenience CAN BUS' registering signals and communicate correctly.
All installed modules on ' power train CAN bus' registering signals and communicate correctly.
CAN gateway in instrument cluster shows all controls modules OK. 2wire communication displayed in measuring block
(centrl 1, radio 1, engine 1, ABS 1, etc) measuring blocks 120-129
All installed modules that show measuring blocks 120-129 register correct signals.
CAN BUS signal waveform ok when checked with oscilloscope.
CAN BUS Wiring from CAN gateway(instrument cluster) to engine ecu and central control module(j519) OK.

Vehicle starts, drives and runs good.
0005687 fault code in engine ecu returns immediately when cleared.
Have swapped a know good J519 module and fault is still the same
CAN gateway is suspected fault. will replacing the instrument cluster resolve the issue.
Any help much appreciated?
Auto Scan below

Code:
Chassis Type: 7H (7H - VW Transporter/Multivan (2003 > 2010))
Scan: 01 02 03 08 09 0B 0D 15 16 17 18 19 1C 22 2D 37 45 46 47 56
          57 6E 76 77 78 7D
 
VIN: WV1ZZZ7HZ7H048478   Mileage: 258710km-160754miles
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 038-906-016-BRS.clb
   Part No SW: 038 906 016 T    HW: 038 906 016 T
   Component: R4 1,9L EDC G000SG  9711 
   Revision: --H02---    Serial number: VWZ7Z0F4457983
   Coding: 0151031
   Shop #: WSC 00070 824 92516
   VCID: 2541A2F9EF0D2BBE98-5140
   VINID: 9E606AAAA1D8A8760010810720BBC3CE41

1 Fault Found:
005687 - Powertrain Data Bus
               P1637 - 000 - Missing Message from Electric Load Controller
             Freeze Frame:
                    Fault Status: 01100000
                    Fault Priority: 0
                    Fault Frequency: 1
                    Reset counter: 255
                    Mileage: 258717 km
                    Time Indication: 0

             Freeze Frame:
                    RPM: 0 /min
                    Speed: 0.0 km/h
                    Load: 0.0 %
                    Voltage: 12.24 V
                    Bin. Bits: 11001000
                    Bin. Bits: 00000000
                    (no units): 0.0

Readiness: 0 0 0 0 1

-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels:. 7H0-907-37x-ABS.clb
   Part No SW: 7H0 907 379 P    HW: 7H0 907 379 P
   Component: (M)ABS MK25E        0103 
   Revision: 00H12001   
   Coding: 0000552
   Shop #: WSC 02744 790 00000
   VCID: 428B19651E63FC869D-5106

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 7H0-937-049.lbl
   Part No: 7H0 937 049 S
   Component: BORDNETZ SGVER 1.0  1101 
   Coding: 0000101
   Shop #: WSC 02744 790 00000
   VCID: 428B19651E63FC869D-5122

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 6Q0-909-605-VW5.lbl
   Part No: 1C0 909 605 A
   Component: 3B AIRBAG VW51      0009 
   Coding: 13122
   Shop #: WSC 02744 
   VCID: 224BB9E5AE23DC86FD-5122

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 7Hx-920-xxx-17.lbl
   Part No: 7H0 920 851 K
   Component: KOMBI+WEGFAHRSP VDO V02 
   Coding: 01111
   Shop #: WSC 00046 
   VCID: 33654CA101D9450E06-5122
   WV1ZZZ7HZ7H048478     VWZ7Z0F4457983

1 Fault Found:
01304 - Radio
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels: 6N0-909-901-19.clb
   Part No: 6N0 909 901
   Component: Gateway K<->CAN    0001 
   Coding: 00006
   Shop #: WSC 02744 
   VCID: 70EF83AD304F3E163B-5122

1 Fault Found:
01304 - Radio
            49-00 - No Communications

-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels: 7H0-959-433.lbl
   Part No: 7H0 959 433 B
   Component: CX5 Komfortgerát     0004 
   Coding: 00021
   Shop #: WSC 02744 
   VCID: 326B49A5FEC34C060D-4B00

No fault code found.

End-------------------------(Elapsed Time: 06:11)--------------------------
 
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   #2  

Uwe

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Vehicle starts, drives and runs good.
So there's no actual functional problem with this vehicle?

0005687 fault code in engine ecu returns immediately when cleared.
OK, but why does this matter? I.e. why would you even contemplate replacing the cluster in an 18 year old vehicle for a spurious fault code like that?

CAN gateway is suspected fault.
Just for laughs, do:

[Select]
[19-CAN Gateway]
[Coding]
- Leave the existing coding (00006) in there.
[Do It!]
- Exit the CAN gateway gracefully.
- Turn ignition off for 30 seconds.
- Turn ignition on but do not start the engine for 30 seconds.

This should cause the Gateway to rebuild its internal installation list. I don't have super high hopes that this will fix your issue, but it doesn't cost much to try.

-Uwe-
 
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