Double beep with key removed car parked in driveway

[william_bb]

Hello all, I'm new but I've been enjoying reading your posts for a while now.

 

I've got a mighty strange one.  With the car sitting parked in the driveway with the key removed, I'm sitting in my house with the key (out of range) and occasionally hear a double beep, the same double beep you hear when there is a locking-related fault.

 

Pulled alarm system codes: 47 - control locking synchronization

                                             33 - passenger compartment monitoring sensor

                                             61 - central locking limit position unlock not reached

 

Dealer confirmed driver door latch sending signal that it is locked at all times even when unlocked.

 

What I really can't get is why would it double beep with no key or any input from me?

Its doing it totally on its own, and I finally had to disconnect the negative battery cable from battery to stop the double beep and stay on good terms with my neighbors.

 

Thanks!

 

01 Boxster S

114k

totally stock, no aftermarket electronics

[JFP in PA]

Welcome to RennTech :welcome:

 

I would look at the internal motion sensor (33 - passenger compartment monitoring sensor)  which is supposed to detect motion inside the car.  We have seen this tripped by excessive sun heat and even an insect moving around inside the car.

[william_bb]

Thank you JFP for the welcome!  I will look further into that monitoring sensor and I'll post back when I hopefully get this resolved.

[amegarth]

Hi

I have a 97 and the electrical connection inside the door to the drivers lock mechanism has caused me trouble for example sometimes when I pull the outside or inside handle the window doesn't drop. I have to go to pax side put in key and lower window to get in. After taking the door panel off I reach in and wiggle the wire harness going to the lock and I can tell there is a bad connection at the lock. The window goes down, up , down red light on the lock button on the dash flashes all because the contact isn't secure. I have cleaned the female conn for on the wire harness and I can make it work but I need to get in there and fix it properly. I think I am going to replace the lock mechanism as it been used a lot in 20 years.

I found some good info for troubleshooting.

http://www.pelicanparts.com/techarticles/Boxster_Tech/78-BODY-Door_Handle_and_Lock/78-BODY-Door_Handle_and_Lock.htm

[White987S]

Also look into a worn out ignition switch and worn out micro switch in the top's lock mechanism.

 

And you do not seem to have an aftermarket radio, so that rules that one out already.

[william_bb]

Thanks White987S and amegarth, got appointment with dealer on 19th to get drivers door latch replaced. 

If it is indeed a worn out ignition switch, I can do that one myself since I changed the one on my wife's 996.

I'll let you all know how it turns out.  In the meantime I checked all my drains by pouring water down them they work fine and the two back foam drain pans have no cracks or rips and drain ok.

[william_bb]

Well guys the dealer replaced the driver's side door lock mechanism, and it turns out the passenger side door lock was reporting locked all the time too so they replaced the passenger side door lock mechanism as well.  So far, the car is remaining silent with no double beeps!  Even they couldn't tell me why it would double beep on its own with no key in it!