T4 7H Electrical System

Hi,
I have my T5 7H bus here.
Suddenly, at night, the hazard lights turn on.
Please send the minutes afterwards.
Maybe someone has an idea.

Greetings.

Jörg.

Vehicle 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

Vehicle Identification Number: WV1ZZZ7HZ4H027772
Mileage: 208,690 km
"Der schnelle braune Fuchs springt über den faulen Hund."
Address 01: Engine Control Module
Label file: DRV\038-906-016-AXB.clb
Part number SW: 038 906 016 A, hardware number: 028 101 073 5.
Part: R4 1.9L EDC G000SG 5226
Revision: 12345678 Serial number: VWZ7Z0C7825274
Encoding: 0000031
Operating number: WSC 02756 785 00200
VCID: 122DFC110E4DA516B4-5168

Sure, here is the translation of the text from German to English:

"1 error found:"
16952 - Switch for GRA (E45)
P0568 - 000 - Implausible signal - Intermittent.
Environmental conditions:
Speed: 882 RPM
Torque: 30.0 Nm
Speed: 0.0 km/h
Last: 0.0%
Voltage: 14.21 V
Binary value: 00001000
Binary value: 11100000
(no unit): 1.0

Readiness: 0 0 X X X

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 03: Brake Electronics Label file: DRV\7H0-907-37x-ASR-F.lbl
Part number: 7H0 907 379 E.
Part: ASR FRONT MK25 0103
Encoding: 0007205
Operating number: WSC 02756 785 00200
VCID: 377B6D85456FA03EE3-512E

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 09: Central Electronics
Label file: DRV\7H0-937-049.lbl
Part number: 7H0 937 049 T.
Component: BORDNETZ SGVER 1.0, 2001.
Encoding: 0000006
Operating number: WSC 02756 790 00000
VCID: 4383095501B7FC9E4F-512E

6 error codes found:
00906 - Signal horn / Double tone horn (H1)
012 - Electrical fault in the circuit - Intermittent.
00909 - Wiper motor - Version V (Level 1/2)
012 - Electrical fault in the circuit - Intermittent.
00901 - Reverse lights.
012 - Electrical fault in the circuit - Intermittent.
00886 - Turn signal switch (E2)
008 - Implausible signal - Sporadic.
00991 - Interior lighting.
007 - Short circuit to ground - Intermittent.
00895 - GRA/ADR Control Panel (E45)
008 - Implausible signal - Sporadic.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 15: Airbag
Label file: DRV\6Q0-909-605-VW5.lbl
Part number: 1C0 909 605 A
Part: XC AIRBAG VW51 0008
Encoding: 22595
Operating number: WSC 02756
VCID: 224DACD1AEEDD59624-512E

No error codes found.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 17: Terminal block module Label file: DRV\7Hx-920-xxx-17.lbl
Part number: 7H0 920 850 L
Component: COMBINATION INSTRUMENT + SPEEDOMETER VDO V01
Encoding: 03111
Operating number: WSC 02350
VCID: 3363599501174C1EDF-512E
WV1ZZZ7HZ4H027772 VWZ7Z0C7825274

Sure, here is the translation of the text from German to English:

"1 error found:"
01336 - Corporate Data Bus Comfort.
49-10 - No communication - Intermittent.

"Der schnelle braune Fuchs springt über den faulen Hund."
Address 19: Diagnostic interface
Label file: DRV\6N0-909-901-19.lbl
Part number: 6N0 909 901.
Component: Gateway K<->CAN 0001
Encoding: 00006
Operating number: WSC 02756
VCID: 70E9969930813706E2-512E

Sure, here is the translation of the text from German to English:

"1 error found:"
01336 - Corporate Data Bus Comfort.
49-10 - No communication - Intermittent.

We need more information. Does this behavior occur every night, or are there certain dependencies, such as temperature or humidity? Can you detect any water leaks in the car? It is certainly advisable to check the mass points or look for signs of woodworm.

Please correct the errors and see which ones reappear.
Please check the control unit for the last triggering reasons of the alarm system.

I'm not sure which control unit (STG) contains the DWA (central locking system) in the 7H model. In the Passat 3C, it was located in control unit 46 (comfort control unit). However, it doesn't appear in your simplified car scan.

Thanks for the responses so far.

I will check the logs again and see which errors reappear.

I had an aftermarket cruise control system installed at the beginning of the year.
The errors occurred 2 months ago.
Temperature independent, water is not in the car.

I will check the points.

Best regards, Jörg.

Okay, I'm sending you the new protocol.
Could the steering column switch be defective?

Quote:

Address 09: Central electronics Label file: DRV\7H0-937-049.lbl Part number: 7H0 937 049 T. Component: BORDNETZ SGVER 1.0, 2001. Encoding: 0000006 Operating number: WSC 02756 790 00000 VCID: 4383095501B7FC9E4F-512E Sure, here is the translation of the text from German to English: "1 error found:" 00895 - GRA/ADR Control Panel (E45) 008 - implausible signal - Sporadically

First, clear the errors and see if it reappears.

Errors deleted.

GRA is still working.
Sorry for the late reply, it's the holidays.
What else I can remember is that a second battery has been installed, with a relay connected to the positive terminal.
I'll also get one for the negative value.

Have a nice day.

Jörg.

Disconnect any systems that were added or modified after the original installation. Simply proceed by using the process of elimination.