Troubleshooting non-working central locking system (key is not dead) - BMW M5 Forum and M6 Forums

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Old 8th March 2007, 19:55   #1
tripleD
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Troubleshooting non-working central locking system (key is not dead)

Yesterday, I posted a question with what I thought was a problem with the self charging key.
Well, just picked up a new key from the dealer for $155 (Ouch!) only to find out they can't seem to program the new key! Seems the old and new keys are fine, but something's amiss with the central locking system. Now, they want me to make an appt and drop off the car.
Wierd thing is the central locking system was working fine just two days ago. I played golf at East Lake Golf Club where it's mandatory to valet your car. The valet brings back my car and that night when I get home, the remote will not lock or unlock the doors.

Has anyone else experienced this? Could it have something to do with the antena or rear view mirror that controls the central locking system?
I've tried the fuse and it's fine. Thanks for any help.
TripleD
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Old 8th March 2007, 20:36   #2
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Did you check the fuse(s) in the right rear of the trunk behind the carpeting?
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Old 8th March 2007, 21:00   #3
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I did not check the fuse, but the BMW service advisor indicated the locking system would not work by manually depressing the button near the e brake. This button still operates the locking system, thus he determined the fuse must be good.
Thanks!
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Old 8th March 2007, 21:14   #4
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Check fuse 43 and 53 and see if they're blown or not. They're located on top of the battery.

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Old 8th March 2007, 21:45   #5
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Try locking the car manually. If everything locks except the gas door, you need a gas door actuator. This can cause the entire central locking to fail and is a common problem with these cars. This of course with the caveat that you checked all fuses. Hope this helps, good luck.

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Old 8th March 2007, 22:31   #6
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Your general module could also be going bad...but its a rare case tht these go bad.
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Old 8th March 2007, 23:18   #7
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Trying using search - definitely something that I've heard of before.
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Old 8th March 2007, 23:25   #8
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Okay, just got home and this is the case! Gas door is unlocked when car is locked. Thanks Dave!
So, anyone know how difficult this is to replace? Where is it located? Tools required?

kees: I did a search under "central locking system" but didn't come up with anything definitive. Thanks though.

I'll try a search on "gas door actuator" and see if anything comes up.

Thank you guys!
TripleD

Quote:
Originally Posted by bmwdctr
Try locking the car manually. If everything locks except the gas door, you need a gas door actuator. This can cause the entire central locking to fail and is a common problem with these cars. This of course with the caveat that you checked all fuses. Hope this helps, good luck.

-Dave
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Old 8th March 2007, 23:26   #9
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Yeah the actuator has an internal short that blows the fuse for the system. Replacing this part can be tricky. Dont forget to replace the fuse as well.
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Old 8th March 2007, 23:31   #10
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Quote:
Originally Posted by tripleD
I'll try a search on "gas door actuator" and see if anything comes up.
That should do the trick...precisely what I had in mind.
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