Technical Strange central lock error

[szente]

Hello!

I recently became the owner of this model, before that I mentally prepared myself for many electric adventures with the Stilo, now the latest one has arrived.
In most cases, the central locking opens the driver's door and the fuel cap, the other doors only after many attempts.
However, if I put the key in the passenger's door and open it, all the doors open. Once all the doors are open, the doors always close with the remote control. If I put the key in the driver's door, only the driver's door and the fuel cap open.
I don't think it's a mechanical problem, because it started with all the doors at the same time.
Where could the fault be?

 

[the green vanper]

Hello,

I'd say the behaviour is strange, usually the 20 - 30 years ago the car manufacturers were putting only one master actuator in the driver's door. The other ones were slave. But perhaps it was changed in the Stilo?

What happens when you open / close from inside of the car, pushing the lock button?

 

[szente]

Thanks for the answer!

All doors work fine with the inside button.
Meanwhile, on the local forum, the idea was given that there is a microswitch in the driver's door lock and it could be malfunctioning.
If I get another unit, will it need to be re-learned?

 

[the green vanper]

No, the opening / closing signal comes from the BCM.

I'd try to disassemble the handle / lock, wash it + lubricate first.

Attached the eLearn doc.

 

[szente]

The car is going to the mechanic for another reason, maybe I can check it next time on Friday.
However, if there was a lubrication problem, shouldn't I still hear the motor trying to open the doors? I hear the relay clicking in the passenger door computer, but I don't hear any attempts from the motor. Let's say, if I have time to completely disassemble the door (right now only the carpet is removed, so I can't access the motor), I can use a multimeter to check if there is power going to the passenger door lock motor.
I'll report back if I find out anything.
Thank you for your time!