Central Locking System Issue- some help please

[RJ'sGottaDrive]

When I go to lock the car, with either the fob or with the key in the door, I get a double beep indicating an issue with the central locking system.

A little further investigation and I find that the passenger door is not locking at all.

My friends scanner pulled the following information-

1.46 Central Locking Synchronization, Unsuccessful After Safe Locking
2.34 Passenger Compartment Monitoring Sensor, Short Test - No Answer, Short Circuit To B+/faulty
3.60 Central Locking Limit Position Locked Not Reached, Switch Position Implausible
4.54 Radio Receiver Faulty (I have an aftermarket radio).

So my thought is that the locking mechanism, or actuator on the passenger side needs to be dug into and I plan to pull the door apart.

BUT, here's the weird part- none of my windows work, except when operating the cabrio top.

Is the window operation somehow tied to the locking system, or the alarm system?

 

Thanks.

[Loren]

The cab top does go through the central locking/alarm control box.

 

Have you cleared the codes and then seen what comes back?

What scanner are you using as those are not Porsche fault codes?

Has the car ever had a leak where the carpet (and control box) got wet?

 

[RJ'sGottaDrive]

Thanks for replying Loren.

Cleared the codes and the problem remains.

The scanner is my friends and I do not know what kind, only that it cost him around $1000. Did not have a chance to rerun a scan as he had limited time.

In the few years I've owned the car, there has never been a leak. The PO did not indicate it either (I bought it from a dealer, and contacted the PO after I found his name on the service records) so no reason to lie about it. He's been very helpful about the cars history.

I'm going to see my indie mechanic this week and have him pull the codes, before I spend around $500 on an OEM door latch.

 

 

[Loren]

What concerns me is the windows also acting strangely. It might be wise to have them pull the central locking control box and open it - looking for water damage.

[RJ'sGottaDrive]

Strange that it's happing now, without any water intrusion lately. I don't even drive it in the rain and it's stored indoors.

Where is the control box located? I could check that myself.

Thank you.

 

[JFP in PA]

26 minutes ago, RJ'sGottaDrive said:

Strange that it's happing now, without any water intrusion lately. I don't even drive it in the rain and it's stored indoors.

Where is the control box located? I could check that myself.

Thank you.

 

Under the driver’s seat.

[RJ'sGottaDrive]

Thanks JFP

[RJ'sGottaDrive]

Fixed!

And a lesson I had to learn again.

Before I pulled the drivers seat, I checked to see what fuses or relays might be involved.

C3 was blown. That's for central locking/alarm, power windows, inside lights and convertible top.

There is another fuse for the top (top control) B1, so maybe that's why the top continued to operate.

If it blows again, I'll dig further into it, but for now, everything is operating as it should.

Next electrical issue- check the fuses first!

Thanks again to those who helped.