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  #1  
Old 08-25-2019, 08:59 PM
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A tricky electrical gremlin - FZV module

Hi all

I had the 4.8is pretty well just sitting around while I got the parts in and did the work on the suspension. Between the suspension and few other bits and pieces the car was not driven for quite a few months and I didn't have the car on a charger.

When I did the suspension, it meant the doors were all open whilst up on the hoist, inc the upper tailgate and that meant a dead battery when I was ready to drive home. No problem as I had the trusty charger so charged it up enough to get home.

Got it home and charged it all up no problems and have been driving it.

Since then I hadn't had cause to lock the car as my drives were all drop offs of eg my son at sports etc. My wife then drove it and went to the shop where the car locked and unlocked with the key.

So here's the problem, now we cannot get the car to lock and unlock with the key or release the boot. Central locking is fine and all doors work correctly.

I've repeatedly tried to reinitialize the key without success.

I checked for codes and found that I have an error 0002 RAD Fault in power supply. Delving into the explanation in ISTA tells me that it is the FZV antenna in the rear, but checking the status of the ECU was fine.

Key still will not pair. The key was regularly used prior and has a new battery at last Christmas. The key has been used for driving repeatedly since when I have to go places I can leave the car unlocked.

I've noted that the CD changer is not able to be communicated with (present prior) and the only other thing I've done is remove the fuse (86 from memory) for the air suspension compressor.

Do any of you radio guru's out there have any thoughts?
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  #2  
Old 08-26-2019, 09:33 AM
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Just to clarify (since we can't see the procedures you took to reinitialize the remote)...when you attempt to reinitialize the remotes:
  • KL R = ignition position 1 (not position 2 or engine running)
  • make sure that ALL the doors are CLOSED...
  • and ALL the doors are UNLOCKED


Wrong key/ignition position, locked and/or open doors will prevent remote initialization. The tips above were only brought up because they are steps that sometime are overlooked or forgotten.






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Old 08-26-2019, 11:02 AM
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Quote:
Originally Posted by Qsilver7 View Post
Just to clarify (since we can't see the procedures you took to reinitialize the remote)...when you attempt to reinitialize the remotes:
  • KL R = ignition position 1 (not position 2 or engine running)
  • make sure that ALL the doors are CLOSED...
  • and ALL the doors are UNLOCKED
Yep... this is the process I followed..... no joy...

I have also cleared the codes and still nothing.
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2004 E53 X5 4.8is
2011 E70 X5 3.0D with Aero kit
2009 E71 X6 50i Sport
2009 E70 X5 50i Sport
2007 E60 540 M Sport LCI (All time favourite car)
2007 E70 X5 4.8i Sport
2005 E53 4.8is
2003 E53 3.0 Sport
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Old 08-26-2019, 11:09 AM
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Just on the off chance...

Have you checked the soldered connections inside the fob and maybe re-replace the battery in case it got damp with sweat in your pocket or had a halfway dead battery right from the package?

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