Door Lock Module?

[michael.williams1]

Some odd things started happening with the electric windows yesterday. When I turned off the ignition after driving, both windows came down automatically. And when I pressed the boot opener on the key fob the same thing happened. My diagnostic gives code 8007 Door Lock Module on the drivers side. I’m wondering if I have a dodgy micro switch(?). Anyone else experienced these symptoms and how did you fix it?

 

[malarcy]

How far down - door opening slight drop or "open" ?

As far as I remember the windows are supposed to drop when you open the boot of a cayman - it allows the air to move freely when closing it.

If both windows are doing the "drop" - I would be more suspicious of the boot mechanism than a single door - i wouldnt expect the passenger door window to drop if you opened the drivers door for example.

As to the code, is it active (i.e. the car is registering the fault "now") or stored? - I usually clear the codes and then run through an operation cycle or two and see if it comes back.

This is what I have for 8007

Diagnostic information driver door
Door lock module
INFORMATION
Fault code is set when:
Implausible button state.

Diagnostic conditions
Opening or closing via the door lock.

Possible fault causes
Open circuit/contact resistance in lines, sockets, connectors and terminals.
Short circuit to B+/ground in the lines
Short circuit between lines
Door lock module faulty.
Driver door control unit faulty.

Affected contacts on the driver door control unit connector
Connector C
15 Key close/open
8 Central locking terminal 31

Affected contacts on the door lock module
Connector A
5 Key close/open
8 Central locking terminal 31

 

[Motorhead]

Paul,

“As far as I remember the windows are supposed to drop when you open the boot of a cayman - it allows the air to move freely when closing it.”

FYI this isn’t something I recognise on my 987.2 CS, but maybe it can be programmed via PIWIS or equivalent?

Jeff

 

[malarcy]

Yeah. maybe that’s where I have seen it.

 

[BrianJ]

I thought it was programmable. I seem to remember in the early months of my 987.2 Cayman ownership lots of people were complaining about how hard they had to slam the "boot" lid to get it to shut (not realising they weren't supposed to be slamming it anyway) and the window opening mod was introduced for that.

 

[malarcy]

Found it in PIWIS - also referenced here with someone doing it with a foxwell - its coded "per door"

https://www.planet-9.com/threads/code-side-windows-to-drop-when-hatch-is-popped.256708/

 

[michael.williams1]

How far down - door opening slight drop or "open" ?

As far as I remember the windows are supposed to drop when you open the boot of a cayman - it allows the air to move freely when closing it.

If both windows are doing the "drop" - I would be more suspicious of the boot mechanism than a single door - i wouldnt expect the passenger door window to drop if you opened the drivers door for example.

As to the code, is it active (i.e. the car is registering the fault "now") or stored? - I usually clear the codes and then run through an operation cycle or two and see if it comes back.

This is what I have for 8007

Diagnostic information driver door
Door lock module
INFORMATION
Fault code is set when:
Implausible button state.

Diagnostic conditions
Opening or closing via the door lock.

Possible fault causes
Open circuit/contact resistance in lines, sockets, connectors and terminals.
Short circuit to B+/ground in the lines
Short circuit between lines
Door lock module faulty.
Driver door control unit faulty.

Affected contacts on the driver door control unit connector
Connector C
15 Key close/open
8 Central locking terminal 31

Affected contacts on the door lock module
Connector A
5 Key close/open
8 Central locking terminal 31

Thank you, that’s very helpful. It gives me a few things to investigate. To clarify, the standard door opening window drop is working fine. The problem I’m having is that the windows are opening fully when a) the ignition is turned off after driving and b) when the boot is opened with the key fob. It’s only just started doing this so can’t be anything programmed with PIWIS. Also, the code won’t go away when I try to clear it with my iCarsoft, so I guess it must be set in due to a faulty module or micro switch or something … I expect I’ll end up removing the door card to investigate further but, before I do that, I thought I’d try spraying some WD40 in the door lock and latch to see if that does anything.

 

[malarcy]

Have you got another key ? - perhaps the fault is in the fob - a stuck "unlock" button or other confusion that is causing the comfort opening to operate ? Try pulling the battery out of the fob then starting and stopping the engine - if the windows behave then the smoking gun is the fob

 

[michael.williams1]

Have you got another key ? - perhaps the fault is in the fob - a stuck "unlock" button or other confusion that is causing the comfort opening to operate ? Try pulling the battery out of the fob then starting and stopping the engine - if the windows behave then the smoking gun is the fob

Good idea! I do have another fob so I’ll give that a try first.

 

[michael.williams1]

Have you got another key ? - perhaps the fault is in the fob - a stuck "unlock" button or other confusion that is causing the comfort opening to operate ? Try pulling the battery out of the fob then starting and stopping the engine - if the windows behave then the smoking gun is the fob

I tried swapping the keys but that hasn’t worked. When I turned off the ignition after driving today both passenger and driver windows came down in a number of juddering steps making it impossible to leave the car with them up, because every time I opened the driver’s door they both came down! With a bit of ingenuity I managed to find and remove the window fuses so they couldn’t function and got the car locked, with the drivers window dropped so I could close the door … all a bit of a nightmare in the rain and the dark this evening! I’ve retreated home to regroup and do some deeper research over the weekend but I’m thinking new door lock module at the moment (?) which looks like quite a bit of work removing the door panel etc. Last time I tried that on a car I broke it so I may revert to the warranty and take it to the OPC …

 

[ianthow]

With so many potential variables based on the OBD scanned fault code, you could spend a lot of time and money trying to eliminate the issue. Find an indy with PIWIS or go to the OPC and ask for a detailed diagnosis. PIWIS should give a more detailed report of what is behind the fault code enabling more precise pointers to the cause(s).

 

[Motorhead]

Time to admit defeat and let your OPC deal with it Michael … that’s why you have a warranty!

Jeff

 

[michael.williams1]

Time to admit defeat and let your OPC deal with it Michael … that’s why you have a warranty!

Jeff

I had another look at things today. I had a look at the loom in the door hinge to try and see if there was any damage to that, but it's covered in a thick rubber sheath so it's not possible to check that visually. I also checked to see if the door drains were clear and there was no problem with that. And I lubricated the door latch but fault 8007 refuses to clear and my iCarsoft V2 diagnostics were not that helpful when I tried comparing DDM and PDM. If the car wasn't under warranty I'd be taking the door panel off and having a go myself but as it is I've just booked it into the excellent Service Department at Porsche Centre Bournemouth.

 

[JohnCRS]

Just one thought, when you hold down the lock button on the key fob any open windows should shut. Will that work to close up the car?

 

[michael.williams1]

Just one thought, when you hold down the lock button on the key fob any open windows should shut. Will that work to close up the car?

No it won’t. I’m not sure that’s ever worked on mine, perhaps that has to be programmed in(?).