Mk 5 Golf Central Locking Problem

**willdudeuk** · 30-06-2021,09:40 AM

I believe it is

3D2837015K(front left) and 3D2837016S(front right).

£194.97 inc VAT

E56C4257-530F-46BC-9E17-7BF5AF02F225.jpg

**Crasher** · 30-06-2021,10:09 AM

The drivers door unit is not the master as such but is right hand drive specific, 3D2 837 016 S and £198.11 (the above price is out of date), buy used or Chinese at your peril! Bugiad of Germany do offer a unit which I have heard is good but there is no stock

**FLAPPERJACK76** · 30-06-2021,10:55 AM

If I was selling it I would say it's probably a fuse as well

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**Holmey** · 30-06-2021,01:49 PM

Originally Posted by Crasher

The drivers door unit is not the master as such but is right hand drive specific, 3D2 837 016 S and £198.11 (the above price is out of date), buy used or Chinese at your peril! Bugiad of Germany do offer a unit which I have heard is good but there is no stock

From what I've been led to understand, the remote fob triggers first a control unit in the car, (that's located behind the glove box), that in turn activates the drivers door activator and that triggers the others ones, but from what you've said, I'm likely wrong.

I took it to the local car lock specialist and his machine couldn't get a reading from the car, the local VW dealer & 2 local VW specialists can't fit it in until the end of next week, with the local VW main dealer not even stocking the the drivers door activator, (saying because it's so expensive), so as she needs it sorting sooner rather than later I've taken a punt on a copy right hand door activator from Amazon, (it's coming from Germany), that I'll try swapping on Friday when it arrives, to me for the sake of £25 a chance worth taking. I know it's going to be a pain of a job taking the door skin off, but I've had a look at the job and got all the required tools, so not that concerned about doing the job myself.

While doing that I'll check all the wiring where it passes through the doors in case they have got chaffed, but if it isn't that, could it be the unit behind the glove box? and if so, how expensive are then and is it a difficult job swapping them?

Regards,

Holmey

**Crasher** · 30-06-2021,05:32 PM

Not far off, the remote sends a signal to the convivence unit behind the glovebox which then instructs both front doors to unlock by a CAN BUS command (on the convenience BUS) to the individual door module (the motor) which then operates the lock unit; the door module also sends an unlock signal to the rear door controller by LIN BUS which then unlocks the door. The status of each door is communicated back to the convenience unit. When you take the door skin off, keep the screws in order of where they go, if you put a long screws in a shallow hole, you pip the skin from the inside out.

**Holmey** · 30-06-2021,09:35 PM

So, as I'm not getting anything when when I press fob, the car key specialist getting nothing when he plugged his key machine into the diagnostic port to read the key code and the lock switch on the door only locking and unlocking the drivers, is it looking more than likely that it's the convenience unit behind the glove box that's packed up? And if so, is that a massive expensive job?

Regards,

Holmey

**FLAPPERJACK76** · 30-06-2021,09:41 PM

Have you looked at the wiring in the driver's door loom between the "A" pillar and the driver's door? I would definitely have a look there before going any further.

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**Holmey** · 30-06-2021,09:45 PM

Originally Posted by FLAPPERJACK76

Have you looked at the wiring in the driver's door loom between the "A" pillar and the driver's door? I would definitely have a look there before going any further.

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Wouldn't the passenger door unlock if that was the case, and the key specialists code reader detect a code instead of detecting nothing? With it being that that's leading me to suspect the convenience unit.

Holmey

**FLAPPERJACK76** · 30-06-2021,09:48 PM

Could be ... but checking the wiring won't cost anything.

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**c..corgill** · 30-06-2021,10:41 PM

Originally Posted by FLAPPERJACK76

Have you looked at the wiring in the driver's door loom between the "A" pillar and the driver's door? I would definitely have a look there before going any further.

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not treading on proffesionals advice in any way.

mate had something like this on his mk5 tdi, would not lock/open with fob, broken wires.