Alarm double beep

[Ravi Matharu]

Hi,

 

My 99 996 has started beeping twice when I press the key fob.

 

It locks and then immediately unlocks.

 

Also when opening the drivers side door, the window goes down when handle is pulled but goes straight back up when the handle is released. So the window obstructs the door closing.

 

I have the following Durametric Alarm errors:

11 Voltage failure during alarm output Status: not present Frequency counter: 1 10 Voltage failure at terminal 30 with alarm system active Status: not present Frequency counter: 1 46 Control locking synchronization Status: not present Frequency counter: 2 49 K lead Status: not present Frequency counter: 1 21 W lead (DME immobilizer) Status: not present Frequency counter: 1

What's the best way to proceed with fixing this?   Thanks Ravi

[DBJoe996]

Hate to say it but it is probably your drivers side door latch mechanism.  There are internal microswitches that create the exact symptoms that you have.   I recently had to replace my drivers side door latch mechanism because it was getting to the point the door would not unlock with the key.  But I figured it was now 21 years old, so I replaced with a new OE Porsche door latch mechanism.  Now works perfectly.

 

That being said, there is another microswitch on the door handle that controls the window drop when opening the door with the outside handle.  Also well known to go bad and fairly easy to replace once the door card is off.  I think I would start there.

Edited April 5, 2020 by DBJoe996