Muy buenas. Tengo un Passat Variant 2009 2.0 TDI 16V 140cv, con unos 145.000kms.

Os escribo desde la desesperación más absoluta. Y perdonad por el tocho.

Hace unos meses, cambié la batería porque debía andar un poco floja y le costaba arrancar al coche.
Hasta que ya no quiso arrancar un día.
Puse una Varta E44 77Ah 780A, que en principio es compatible con este coche...tengo que decir que
el coche se quedó sin batería unas horas.

El caso es que desde entonces, han ido surgiendo averías en el coche...empezó fallando el "zumbador"
trasero del park assist (que cambié por uno nuevo)...pero después ha empezado a fallar la puerta trasera
izquierda, quedándose abierta cuando cierro el coche, no funciona el elevalunas (ni con su respectivo botón
ni con el de la puerta del conductor), y tampoco se ilumina el botón del elevalunas.

Pasé el vagcom y me dio diversas averías...he hecho lo típico de mirar el mazo de cables de dentro del fuelle
que va desde el pilarete a la puerta, he quitado el guarnecido de la puerta... y aparentemente los cables están
bien, no hay ninguno pelado o cortado.
Como apenas tengo idea de electrónica y del vagcom, no sé por dónde continuar...he buscado en un montón
de foros, vídeos, etc... y estoy totalmente atascado.

Os pongo el último auto-scan que hice ayer con vagcom:

Tuesday,09,February,2021,17:46:20:62939
VCDS -- Windows Based VAG/VAS Emulator
VCDS Version: Release 12.12.0 (x64)
Data version: 20130910


VIN: WVWZZZ3CZAE002612 License Plate: 1111



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


Chassis Type: 3C (3C0)
Scan: 01 03 08 09 10 14 15 16 17 19 25 42 44 46 52 53 55 56 62 69
72

VIN: WVWZZZ3CZAE002612

01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
04-Steering Angle -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: Malfunction 0010
10-Park/Steer Assist -- Status: OK 0000
14-Susp. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: Malfunction 0010
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: Malfunction 0010
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: Malfunction 0010
53-Parking Brake -- Status: OK 0000
55-Xenon Range -- Status: OK 0000
56-Radio -- Status: Malfunction 0010
62-Door, Rear Left -- Status: Cannot be reached 1100
69-Trailer -- Status: OK 0000
72-Door, Rear Right -- Status: OK 0000

-------------------------------------------------------------------------------
Address 01: Engine (CBA) Labels: 03L-906-022-CBA.clb
Part No SW: 03L 906 022 QC HW: 03L 907 309
Component: R4 2,0L EDC G000SG 3732
Revision: 13H02--- Serial number: VWZCZ000000000
Coding: 0000072
Shop #: WSC 84224 922 690344
VCID: 76E300530132E6AEBEF-8023

No fault code found.
Readiness: 0 0 0 0 0

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 3C0-614-109-C4.clb
Part No SW: 3C0 614 109 AF HW: 3C0 614 109 AF
Component: J104 C4 440 V2 0015
Revision: --025--- Serial number: 00000795275763
Coding: 0002323
Shop #: WSC 05311 000 00000
VCID: 62CB4C03BDBA6A0EE27-8037

No fault code found.

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: 3C0-907-044.lbl
Part No SW: 3C0 907 044 DK HW: 3C0 907 044 DK
Component: ClimatronicPQ46 133 0909
Revision: 00133025 Serial number: 00000000000000
Shop #: WSC 00000 000 00000
VCID: 6DD12F3F746425764F5-8038

No fault code found.

-------------------------------------------------------------------------------
Address 09: Cent. Elect. Labels: 3C0-937-049-30-H.lbl
Part No SW: 3C8 937 049 E HW: 3C8 937 049 E
Component: Bordnetz-SG H54 2602
Revision: 00H54000 Serial number: 00000009668842
Coding: E78A8F0700041A00470A00000F000000000B5D435C00012000 0000000000
Shop #: WSC 05124 000 00000
VCID: 3365F94752C0B386591-8066

Subsystem 1 - Part No: 3C1 955 419 A Labels: 1KX-955-119.CLB
Component: Wischer 050509 004 0206
Coding: 00046997
Shop #: WSC 05124

Subsystem 2 - Part No: 1K0 955 559 AH Labels: 1K0-955-559-AG.CLB
Component: RLS 230609 054 0402
Coding: 00208936
Shop #: WSC 05124

1 Fault Found:
01333 - Door Control Module; Rear Left (J388)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 6
Fault Frequency: 196
Reset counter: 208
Mileage: 144490 km
Time Indication: 0

Freeze Frame:
OFF
Voltage: 12.30 V
OFF
ON
OFF
OFF
OFF


-------------------------------------------------------------------------------
Address 10: Park/Steer Assist (J446) Labels: 3C8-919-475.clb
Part No SW: 3C8 919 475 A HW: 3C8 919 475
Component: PARKHILFE 8K H07 0009
Revision: -------- Serial number: 08740916005002
Coding: 110002
Shop #: WSC 05314 000 00000
VCID: 326BFC436DDABA8E527-8067

No fault code found.

-------------------------------------------------------------------------------
Address 14: Susp. Elect. (J250) Labels: None
Part No SW: 3C0 907 376 A HW: 3C0 907 376
Component: DAEMPFUNGS-SG H07 0070
Revision: 00000000 Serial number: 22060902030001
Coding: 010180
Shop #: WSC 05314 000 00000
VCID: 275D1D175618CF26F59-8072

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: 5N0-959-655.lbl
Part No SW: 5N0 959 655 H HW: 5N0 959 655 H
Component: J234__02P VW10 HI 1916
Revision: 20013000 Serial number: 003E1PBYV640
Coding: 0012880
Shop #: WSC 05311 000 00000
VCID: 428BAC831D7A0A0EC27-8017

Subsystem 1 - Serial number: 6332MTS658331389

Subsystem 2 - Serial number: 6342MTS618391329

Subsystem 3 - Serial number: 6351HTS6T1G126KR

Subsystem 4 - Serial number: 6361HTS6N0E426KJ

Subsystem 5 - Serial number: 00000000000000000

Subsystem 6 - Serial number: 00000000000000000

No fault code found.

-------------------------------------------------------------------------------
Address 16: Steering wheel Labels: 3C0-953-549-SW25.lbl
Part No SW: 3C0 953 549 AK HW: 3C0 953 549 AK
Component: J0527 0030
Revision: 00032000 Serial number: 3C9953507CP
Coding: 0000512
Shop #: WSC 05314 000 00000
VCID: 75E1075F1C34EDB6B75-8020

Subsystem 1 - Part No: 3C8 959 537 B
Component: E221__MFL-TAP H4ÿ 0021
Coding: 00000226
Shop #: WSC 00000

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments (J285) Labels: 3C8-920-xxx-17.clb
Part No SW: 3C0 920 872 B HW: 3C0 920 872 B
Component: KOMBI H02 0206
Serial number: 00000000000000
Coding: 161F00
Shop #: WSC 05314 115 00000
ASAM Dataset: EV_Kombi_UDS_VDD_RM09 A04040
ROD: EV_Kombi_UDS_VDD_RM09_SE35.rod
VCID: 24470A1B2F2E243ED0B-8071

No fault code found.

-------------------------------------------------------------------------------
Address 19: CAN Gateway Labels: 3C0-907-530-V3.clb
Part No SW: 3C0 907 530 L HW: 3C0 907 951
Component: J533__Gateway H13 0152
Revision: H13 Serial number: 3300P09619099A
Coding: F9A97F46000202002002
Shop #: WSC 05314 000 00000
VCID: 2A5BE423850AF24EEA7-807F

1 Fault Found:
01333 - Door Control Module; Rear Left (J388)
004 - No Signal/Communication
Freeze Frame:
Fault Status: 01100100
Fault Priority: 2
Fault Frequency: 3
Reset counter: 208
Mileage: 145239 km
Time Indication: 0
Date: 2063.14.31
Time: 17:24:51


-------------------------------------------------------------------------------
Address 25: Immobilizer Labels: 3C0-959-433-25.clb
Part No SW: 3C0 959 799 H HW: 3C0 959 799 H
Component: IMMO 070 0383
Revision: 00070000 Serial number: VWZCZ000000000
Shop #: WSC 131071 1023 2097151
VCID: 3E73D87369826EEEA6F-806B

Subsystem 1 - Part No: 3C0 905 861 G
Component: ELV 027 0380
3C0905861G ELV 027 0380

No fault code found.

-------------------------------------------------------------------------------
Address 42: Door Elect, Driver
Cannot be reached

-------------------------------------------------------------------------------
Address 44: Steering Assist Labels: 5N1-909-144.clb
Part No SW: 5N1 909 144 K HW: 5N1 909 148 G
Component: J500__APA-BS KL.154 0703
Revision: 1AH03256 Serial number: 00091230113602
Coding: 0000258
Shop #: WSC 05311 000 00000
VCID: 3A7BD46375AA42CE9A7-806F

No fault code found.

-------------------------------------------------------------------------------
Address 46: Central Conv. Labels: 3C0-959-799-46.clb
Part No SW: 3C0 959 799 H HW: 3C0 959 799 H
Component: 02 KESSY PQ46 R 070 0231
Revision: 00070000 Serial number: VWZCZ000000000
Coding: 0191020051434E763004943F70004FCE507C01030404B8
Shop #: WSC 05311 123 12345
VCID: 3E73D87369826EEEA6F-806B

Subsystem 1 - Part No: 1K8 951 605
Component: LIN BACKUP HORN H09 9002

Subsystem 2 - Part No: 3C0 951 171 C
Component: Neigungssensor 004 0611

Subsystem 3 - Part No: 3C0 951 171 C
Component: Innenraumueberw.004 0611

3 Faults Found:
01134 - Alarm Horn (H12)
000 - -
Freeze Frame:
Fault Status: 01100000
Fault Priority: 4
Fault Frequency: 3
Reset counter: 162
Mileage: 144530 km
Time Indication: 0
Date: 2063.14.31
Time: 08:18:25

00192 - Rear Left Door Handle Touch Sensor (G417)
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 4
Fault Frequency: 1
Reset counter: 233
Mileage: 144979 km
Time Indication: 0
Date: 2063.14.31
Time: 20:06:03

01038 - Central Locking Thermal Protection
000 - - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 4
Fault Frequency: 56
Reset counter: 245
Mileage: 145210 km
Time Indication: 0
Date: 2063.14.31
Time: 12:54:19


-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.
Cannot be reached

-------------------------------------------------------------------------------
Address 53: Parking Brake Labels: 5N0-907-801.clb
Part No SW: 3C8 907 801 C HW: 3C8 907 801 C
Component: J540 EPB3 VW-13618 0005
Revision: 010 Serial number: 00000000031181
Coding: 0000057
Shop #: WSC 05311 000 00000
VCID: 2A5BE423850AF24EEA7-807F

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 5M0-907-357-V2.lbl
Part No SW: 5M0 907 357 C HW: 5M0 907 357 C
Component: AFS-Steuergeraet 0142
Revision: 00H04000 Serial number:
Coding: 2313217
Shop #: WSC 05311 000 00000
VCID: 3467FA5B57CEB4BE40B-8061

Subsystem 1 - Part No: 7L6 941 329 A
Component: AFS-Lst.-Modul l 0004
Coding: 00000035

Subsystem 2 - Part No: 7L6 941 329 A
Component: AFS-Lst.-Modul r 0004
Coding: 00000035

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio (J503) Labels: 5M0-035-1xx-56.clb
Part No SW: 1K0 035 186 AA HW: 1K0 035 186 AA
Component: Radio RCD310 013 0036
Revision: 01000000 Serial number: VWZ1Z2I6203209
Coding: 0500040004
Shop #: WSC 05314 000 00000
VCID: 65C1571F6C941D36075-8030

1 Fault Found:
03138 - Input AUX IN
011 - Open Circuit
Freeze Frame:
Fault Status: 01101011
Fault Priority: 5
Fault Frequency: 1
Reset counter: 152
Mileage: 144490 km
Time Indication: 0
Date: 2063.14.31
Time: 20:34:41


-------------------------------------------------------------------------------
Address 62: Door, Rear Left Labels: None
Part No: No response
Component: Error LIN Slave 0
Shop #: WSC 00000 000 00000
VCID: 2C57E23B8FFEEC7E18B-8079

2 Faults Found:
00122 - Outside Warning Light/Door exit Light; Rear Left
012 - Electrical Fault in Circuit - Intermittent
Freeze Frame:
Fault Status: 00101100
Fault Priority: 5
Fault Frequency: 1
Reset counter: 248
Mileage: 145239 km
Time Indication: 0
Date: 2063.14.31
Time: 13:26:24

02071 - Local Databus
004 - No Signal/Communication - Intermittent
Freeze Frame:
Fault Status: 00100100
Fault Priority: 4
Fault Frequency: 128
Reset counter: 248
Mileage: 144490 km
Time Indication: 0
Date: 2063.14.31
Time: 20:50:04


-------------------------------------------------------------------------------
Address 69: Trailer (J345) Labels: 1K0-907-383-MY8.lbl
Part No SW: 1K0 907 383 E HW: 1K0 907 383 E
Component: Anhaenger H07 0080
Revision: 3A002002 Serial number: 00000119202755
Coding: 4100000100000000
Shop #: WSC 05770 572 81593
VCID: 2F6DF5377EE897663D9-807A

No fault code found.

-------------------------------------------------------------------------------
Address 72: Door, Rear Right Labels: 1K0-959-704-GEN3.lbl
Part No SW: 1K0 959 704 AB HW: 1K0 959 794 L
Component: J389 TUER-SG HR 0307
Revision: 41004101 Serial number: 00000000963257
Coding: 0000208
Shop #: WSC 05311 000 00000
VCID: 71E9334F685CC1966BD-8024

No fault code found.

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

Es que ahora ya me da error hasta en la alarma.
He leído que puede ser el módulo confort, que se haya fastidiado o simplemente desconfigurado al estar unas horas sin batería,
pero como digo, no tengo ni puñetera idea.
Echadme un cable, por favor.
Muchísimas gracias por adelantado.