Rear door central locking problem

[volvoski]

My wife's xc70 has remote fob central locking, as I'm sure they all do. When you lock it the alarm is armed and the doors lock. Or so we thought. Our rear drivers side door does not lock. The alarm will go off if you open it but it definitely does not lock.
Any ideas please before I strip the door down? Is this a known issue?
We only noticed when the I phone we leave in the cubby box as a music player and a tenner of pound coins/ parking change disappears from the car with no visible signs of a break in .....
Thanks, John.

[Semnoz]

Mine had been doing the same, and I get round this issue by clicking the lock button twice on the remote.

So at present, the first press of the remote lock button appears to lock all the doors, but I notice the RHS rear door lock indicator 'knob' seems to half pop-up again at the end of central locking cycle - and like you, I can then pull it open setting off the alarm. But if I press the remote lock button again, this door 'knob' goes down and stays down, and I then can't open the door.

I'm not sure if the 2nd press of the button is an actual function or not, for example, on my Focus, pressing the remote lock twice does a 'dead-lock', or something like that.

[volvoski]

That made a lot of sense so I just went out to test the theory.
When you lock the car the rear doors pin moves down but not all the way- only halfway. If you press the lock button again it sort of shivers but won't lower anymore. Door remains unlocked and the alarm is all working when you open it.
I have squirted a good dose of lubrication down the edges of the knob to see if it may have been catching but it's action is smooth and not sticking.
If you manually push the knob down and then lock the car on the fob it stays locked.
The lock is moving but not engaging properly.
The knob remains a cm above the door panel so it is obvious that the door is open I guess to anyone who is looking out for an open car to rob. Anymore ideas please?
Any idea how to get the rear door to stay locked manually and not respond to the fob? We generally never use the rear doors- two of us and the dogs in the boot.it would be a cheap fix I guess if we could leave that door locked u till you operated the rear interior handle.

[Simon Jones]

You don't mention what year you car is, but on mine you have option in the car settings to just open the drivers door or all of them when you unlock. It would help when its just the driver using it.

Coincidentally, before I bought my XC70 from a garage, I plugged in VIDA and it picked up faulty O/S/R door actuator so I was able to get the seller to replace it before I collected the car. Probably wouldn't have spotted it otherwise, especially as the rear windows are tinted so you can't see the button was not going down.

[volvoski]

The car is a 2010 xc70 lux. It would be a reasonable assumption that the central locking actuator on that door is not working correctly.
I guess vida is a computer system for diagnostics? Would my bog standard code reader work on a Volvo please?

[Simon Jones]

VIDA and Dice are the software and hardware parts of the Volvo diagnostics equipment used by main dealers. You can pick up 'clones' for reasonable money and will pay for themselves in no time. Unfortunately, no other code readers will give you a fraction of the functionality.

Have a look if there is someone near you who could help you out: https://www.volvoforums.org.uk/showthread.php?t=136759

[Deefer666]

Originally Posted by volvoski

The car is a 2010 xc70 lux. It would be a reasonable assumption that the central locking actuator on that door is not working correctly.
I guess vida is a computer system for diagnostics? Would my bog standard code reader work on a Volvo please?

Did you sort.. Got a similar fault.. Sometimes 2nd press gets it. Sometimes 4 or 5 by which time I'm climbing through from the other side to do it manually!... I think the settings option might get used to tide it over 'till fixing time...

[NorthantsPete]

Originally Posted by volvoski

That made a lot of sense so I just went out to test the theory.
When you lock the car the rear doors pin moves down but not all the way- only halfway. If you press the lock button again it sort of shivers but won't lower anymore. Door remains unlocked and the alarm is all working when you open it.
I have squirted a good dose of lubrication down the edges of the knob to see if it may have been catching but it's action is smooth and not sticking.
If you manually push the knob down and then lock the car on the fob it stays locked.
The lock is moving but not engaging properly.
The knob remains a cm above the door panel so it is obvious that the door is open I guess to anyone who is looking out for an open car to rob. Anymore ideas please?
Any idea how to get the rear door to stay locked manually and not respond to the fob? We generally never use the rear doors- two of us and the dogs in the boot.it would be a cheap fix I guess if we could leave that door locked u till you operated the rear interior handle.

EXACTLY the same problem, it must be an issue witht hese. Mine is the P3 V70 but its the same door, same problem, doesnt go all the way (only found out because the lad opened the door before i had chance to unlock).

Im convinced this coul dbe why my alamrs going off too

the issue isnt the motor, it moves fine, it must not be catching the pin right or the mechanism cant move freely. If not attached to the door it closes just fine so something over time is building up or drying out.

Do we have any door card removal pictures/techniques?

[37 RUBY]

Originally Posted by NorthantsPete

Do we have any door card removal pictures/techniques?

Yes.....https://youtu.be/vIZmJFqoDKk

[NorthantsPete]

Originally Posted by 37 RUBY

Yes.....https://youtu.be/vIZmJFqoDKk

yep, saw that a few days back, glad these guys had the balls to do it as i would have got half way and crapped myself or dropped everything inside the door!

Easier to buy a whole unit though instea dof peeing about with motors