After locking doors with either key or remote, locks
will engage momentarily and then disengage. In
other words, doors will not remained locked for more
than about 10 seconds.

Has anyone experienced this problem? If so, what
did you do to solve it

Helping a buddy with his newly acquired 97 C4S,
equipped with drive block system.

Thanks, Steve

 

I am having the same problem with the aftermarket locks on my wife's E, only the opposite. Locks itself after it sits unlocked for a minute or so. But only with one remote, the other works fine. I suspect a short or bad button in one remote. Tried everything including new battery and wiggling stuff around.
Edit: Steve, I just noticed you say "with key or remote".
I thought that unlocking with key was the first step in reprogramming your remote. Maybe that is the issue, that the car is waiting for the code sequence as described in the manual.

 

Hi Steve,
First congratulations on your C4S!
The only time I ever had a problem like that is when the door was not well shut.

 

Check the alarm module under the passenger seat. Find someone who has a spare and try it.
Many of the independant Porsche repair places have them used. I went to one place hear in Fort Lauderdale Gulf Performance, he had a stack of used ones.
Chris

 

Thank you gentleman

I'll first read the manual on resetting the codes and if that
doesn't work take the module out of my car to try in my
buddies.

Happy Holidays, Steve

 

A friend has had the same problem in his Boxster - turned out to be a duff door sensor.

PJC

 

A bad door switch (sensor) would make the central locking system think that a door isn't completely shut, and so the doors would then immediately unlock. So IMHO that's the most likely cause. Offhand, I don't know if a bad trunk switch would do the same.

 

I had this problem. Do you have an aftermarket stereo? If so, in my case the installer used a screw to mount the door speaker that went through the harness.

I had the dealer redo both harnesses. When I did the search, this also happens when the door lock actuator goes bad (which is infrequent). Go to the dealer, have them run the codes and the book will tell what sensor is being trigered.

 

This place really is great.

Thanks again for your imput.

Steve