DIY: How to repair a VW MK5 door lock module

[willdudeuk]

Hi this is a great write up!

I’ve been trying to repair my own door locks but no having much success.

Got a Golf Mk5 2004 (1.6 FSI - BAG engine code).

Wiring harness looked good and checked the door jam area as they are known for them going there. Couldn’t find any broken wires.

Stripped the lock down and cleaned out motors and polished commutator with sandpaper as shown in the guide.

But the door lock doesn’t lock and unlock as it should.

Any ideas what I should do?

Thanks

[MEL744]

Are you hearing any noise from inside the door when trying to lock/unlock and have you scanned the car for any faults?

[willdudeuk]

Yes I’ve got VCDS / VAG COM....will do a scan and report back to you.

It was making noises...from what I could tell.

Before I started fiddling the door remained permanently open and wouldn’t lock.

Now it appears to to be permanently locked and won’t open....

Not sure what to do?

[JustCruisn]

Try to open from the inside. The electronic motor is used to lock and unlock for the remote. Pulling the internal handle should unlock mechanically.
Just relace the lock, there are many aftermarket options huge price range too.
The cheaper ones do work, but I have found 1 of 3 I purchased does not do deadlock mode, It always opens from the inside which is a pain as due to the heat over here leaving the windows partially down can be a nice thing.

[willdudeuk]

Managed to get door back open and have stripped it all down again.

Still a bit clueless as to why it isn’t locking / unlocking. It looks as if it gets stuck in the locked position for whatever reason.


I’ve attempted to inspect the circuit board for bad solder joints but can’t see anything obvious. I know these can be very subtle so I may have missed something.

Now starting to suspect dodgy wiring from the window control unit to door lock, or in the door jam area.

[willdudeuk]

Here is my VCDS scan,

Saturday,05,December,2020,18:32:59:33544
VCDS -- Windows Based VAG/VAS Emulator Running on Windows 7 x64
VCDS Version: 20.4.2.0 (x64)
Data version: 20200730 DS317.0
www.Ross-Tech.com




VIN: WVWZZZ1KZ4W096975   License Plate: 




Chassis Type: 1K (1K0)
Scan: 01 03 08 09 15 16 17 19 25 42 44 46 52 56


VIN: WVWZZZ1KZ4W096975   Mileage: 351740km-218561miles


00-Steering Angle Sensor -- Status: OK 0000
01-Engine -- Status: OK 0000
03-ABS Brakes -- Status: OK 0000
08-Auto HVAC -- Status: OK 0000
09-Cent. Elect. -- Status: OK 0000
15-Airbags -- Status: OK 0000
16-Steering wheel -- Status: OK 0000
17-Instruments -- Status: OK 0000
19-CAN Gateway -- Status: OK 0000
25-Immobilizer -- Status: OK 0000
42-Door Elect, Driver -- Status: OK 0000
44-Steering Assist -- Status: OK 0000
46-Central Conv. -- Status: Malfunction 0010
52-Door Elect, Pass. -- Status: Malfunction 0010
56-Radio -- Status: OK 0000
 
-------------------------------------------------------------------------------
Address 01: Engine        Labels: 03C-906-056-BAG.lbl
   Part No SW: 03C 906 056 BA    HW: Hardware No 
   Component: MED9.5.10       G00 5697  
   Revision: 00000000    Serial number: VWZ7Z0D9331576
   Coding: 0000072
   Shop #: WSC 01279 785 00200
   VCID: 63C1C201A2D6B09E6E-8036


No fault code found.
Readiness: 1110 0101


-------------------------------------------------------------------------------
Address 03: ABS Brakes        Labels: 1K0-907-379-MK60-F.lbl
   Part No: 1K0 907 379 K
   Component: ESP FRONT MK60      0103  
   Coding: 0019073
   Shop #: WSC 01279 785 00200
   VCID: 3A7F5F6575DC91561D-806E


No fault code found.


-------------------------------------------------------------------------------
Address 08: Auto HVAC        Labels: 1K0-820-047.lbl
   Part No: 1K0 820 047 CB
   Component: Climatic PQ35   080 0201  
   Shop #: WSC 00000 000 00000
   VCID: 66C7DB1551E4C5B689-8032


No fault code found.


-------------------------------------------------------------------------------
Address 09: Cent. Elect.        Labels:. 3C0-937-049-23-M.lbl
   Part No SW: 1K0 937 049 K    HW: 1K0 937 049 K*
   Component: Bordnetz-SG 1.0 H30 0701  
   Revision: 00030000    Serial number: 00000000514812
   Coding: E48D0F0600041800001400001400000000
   Shop #: WSC 00000 000 00000
   VCID: 3779465146CE8C3EE2-8062


   Subsystem 1 - Part No: 1K2 955 119 B  Labels: 1KX-955-119.CLB
   Component: Wischer VW350  012  0401  
   Coding: 00065493
   Shop #: WSC 00000  


   Subsystem 2 - Part No: 1K0 955 559 K  Labels: 1K0-955-559-AF.CLB
   Component: RegenLichtSens 002  0505  
   Coding: 00217125
   Shop #: WSC 00000  


No fault code found.


-------------------------------------------------------------------------------
Address 15: Airbags        Labels: 1K0-909-605.lbl
   Part No SW: 1K0 909 605 A    HW: 1K0 909 605 A
   Component: 0M AIRBAG VW8   022 0500  
   Revision: 04022000    Serial number: 0033FD08P0VC  
   Coding: 0012365
   Shop #: WSC 01268 785 00200
   VCID: 2A5F6F25857C21D66D-807E


   Subsystem 1 - Serial number: 6332MSME5D7E1002 


   Subsystem 2 - Serial number: 6342MSME57340A02 


   Subsystem 3 - Serial number: 6351HSME43485801 


   Subsystem 4 - Serial number: 6361HSME5D0F5901 


No fault code found.


-------------------------------------------------------------------------------
Address 16: Steering wheel        Labels: 1K0-953-549-MY8.lbl
   Part No SW: 1K0 953 549 A    HW: 1K0 953 549 A
   Component: Lenksäulenmodul 012 0030  
   Coding: 0000022
   Shop #: WSC 01279 785 00200
   VCID: 306B7D4DA3A05B06A3-8064


No fault code found.


-------------------------------------------------------------------------------
Address 17: Instruments        Labels: 1K0-920-xxx-17.lbl
   Part No: 1K0 920 950 K
   Component: KOMBIINSTRUMENT VDD 3554  
   Coding: 0000401
   Shop #: WSC 00218 210 03908
   VCID: 306B7D4DA3A05B06A3-8064


No fault code found.


-------------------------------------------------------------------------------
Address 19: CAN Gateway        Labels:. 1K0-907-530-V1.clb
   Part No SW: 1K0 907 530 C    HW: 1K0 907 951 
   Component: Gateway         H08 0080  
   Revision: 08          Serial number: 2100104128EF35
   Coding: 3D0F0340070003
   Shop #: WSC 01279 785 00200
   VCID: 27599611966E1CBE72-8072


No fault code found.


-------------------------------------------------------------------------------
Address 25: Immobilizer        Labels: 1K0-920-xxx-25.clb
   Part No: 1K0 920 950 K
   Component: IMMO                3554  
   Shop #: WSC 00000 000 00000
   VCID: 306B7D4DA3A05B06A3-8064


No fault code found.


-------------------------------------------------------------------------------
Address 42: Door Elect, Driver        Labels: 1K0-959-701-MIN1.lbl
   Part No: 1K0 959 701 E
   Component: Tuersteuergeraet 09 0116  
   Coding: 0000052
   Shop #: WSC 01279 785 00200
   VCID: 306B7D4DA3A05B06A3-8064


No fault code found.


-------------------------------------------------------------------------------
Address 44: Steering Assist        Labels: 1Kx-909-144-G2V1.clb
   Part No: 1K2 909 144 E
   Component: EPS_ZFLS Kl.1       1202  
   Shop #: WSC 00000 000 00000
   VCID: 2E576335B9944DF6B1-807A


No fault code found.


-------------------------------------------------------------------------------
Address 46: Central Conv.        Labels:. 1K0-959-433-MIN.clb
   Part No: 1K0 959 433 BL
   Component: 01 KSG              0301  
   Coding: 81E802087F2D8505485BC61000
   Shop #: WSC 00218 210 08203
   VCID: 7BF19A613A66685E46-802E


   Subsystem 1 - Part No: 1K0 951 605 C
   Component: LIN BACKUP HORN H05 1501


   Subsystem 2 - Part No: 1K0 907 719 
   Component: Neigungssensor  003 0003


   Subsystem 3 - Part No: 1K0 951 177 
   Component: Innenraumueberw.004 0101


3 Faults Found:
01134 - Alarm Horn (H12) 
            004 - No Signal/Communication
00931 - Locking Module for Central Locking; Rear Right (F223) 
            012 - Electrical Fault in Circuit
01038 - Central Locking Thermal Protection 
            000 - -


-------------------------------------------------------------------------------
Address 52: Door Elect, Pass.        Labels: 1K0-959-702-MIN1.lbl
   Part No: 1K0 959 702 E
   Component: Tuersteuergeraet 09 0116  
   Coding: 0000052
   Shop #: WSC 01279 785 00200
   VCID: 316D7849A8AA520EAC-8064


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


-------------------------------------------------------------------------------
Address 56: Radio        Labels: 1K0-035-1xx-56.lbl
   Part No: 1K0 035 186 J
   Component: Radio BNO           0016  
   Coding: 0040400
   Shop #: WSC 01279 785 00200
   VCID: 2D556439B49236EE88-8078


No fault code found.


End-------------------------(Elapsed Time: 01:34)--------------------------

[saabman]

The implausible signal implies that the signal sent back to the door control module is not what the module is expecting - for example, its expecting the door to be open but the signal is saying its closed. That in conjunction with the 01038 Central locking thermal protection which appears to indicate that the door module is not getting a message to stop the motor and the driver is overheating due to a stalled motor.

checking the operation of the micro switches would be a good place to start.

from memory the drivers door has 3.
1 door open/closed
2 lock active
3 unlock signal (from using the key)

the other doors only have 2.

There are some you tube clips on replacing and testing the switches.
Interestingly it appears faulty switches seem to be more prevalent in the UK and in Aus its the motors..... Just my observation.