Remote central locking died after replacing roof motor

Markh

Member
Hi forum, need some help - regular forum reader but never registered - however really struggling with this one - trawled most threads but can't fix it!!! (2004 3.0i SE)

Remote locking all working fine until I ripped the hood out to replace the motor and relocated it to boot - all back together but remote locking now not working – cut the diamond key apart last night and the existing battery is showing 3.3v dropping to 3.1v when you press any of the fob buttons so looks like key fob is ok (only got 1 key).

Internally the central door locking button works and deadlocks/unlocks both doors + boot button opens boot from inside, so to my mind either the remote sensors not picking up a signal or I’ve not reconnected something as a result of replacing the hood – but not been anywhere near the remote sensor which I believe is in the rear view mirror.

Followed a couple of threads on here, but now really clutching at straws - a while back I laid the car up when I changed the gearbox oil and the battery went flat - subsequently the air bag light came on after recharging the flat battery. Central locking all still fine until I ripped the roof out about 3 weeks ago.

So my question would the air bag control unit trick the ECU/central locking module into thinking its deployed the airbags as the air bag light is on and not allow the car to lock – or are there any sensors within the door locking mechanism/door card that would inhibit the central locking sensing the doors were open I may of not reconnected or broken or a hidden inhibitor switch in the boot?

One thing I can’t sus out is there are 2 electrical components either side of the hood that sit right at the top of the ram assembly but under a rubber cover – they look as if something should close down on them from the frame assembly when its closed – I did break one of the connection but re soldered it but as there’s a rubber cover I can’t see what they do or how they would be connected to the remote – red herring perhaps!!

Any advise would be most welcome!!!
 
There is a chance the key may need pairing with the car again.

I had to do this once when my key stopped locking and unlocking the doors.

There is a sequence of holding the buttons near the rear view mirror that does it, but can't remember quite how to do it.

Someone will come along and tell you.

Oh and maybe a hello I'm new on here might have been a good start to your post :wink:
 
Hi jollyjoiner, thanks fo the info I did try the pairing method using the ignition barrell but not seen any info with regard to pairing near the mirror - hopefully like you mention sure someone will post it.

BTW, posted in newbie to save grace - opps!!
 
Hi Markh

Have a look here

http://www.programyourkeys.com/BMW_Z4_Key_Remote_Control_Fob_Programming.html
 
Hi, the connectors both sides under the rubber covers are sensors for when fitting a hard top to stop the soft top operating if started by accident.

Cheers, tug :thumbsup:
 
Hi Tug's, of course just never dawned on me - thanks!!!

Saga continues!!!

Now the drivers door locking mechanism won't open from inside or outside - having to climb through the passenger side!!!

Had a look a both Bowden cables all looks fine, certainly the inside cable should release the lock but its now dead locked itself!

Anyone know if any of the other BMW's you would commonly find in the breakers share the same locking mechanism?

Cheers all
 
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