Can you help me please ?

I have just fitted a new battery to my L 322 and lost the sat nav. I believe this is normal when the battery is changed or Tyres even . How do I get my sat nav back ?

Before you disconnected the battery did you wait the obligatory 3 minutes for the Sat Nav and other systems to sleep first??

You MUST wait for the Sat Nav unit to sleep before disconnecting the battery else you will fry its little brain.

Try removing Fuse no. 49 for 20 minutes and reinserting...some have had results from this period of power shutdown.

Oops

Another piece of brilliant BMW design.

Datatek said:

Another piece of brilliant BMW design.

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+1

Can't see how they designed such a silly unit that frys itself when power is lost !

2.0_hippo said:

+1

Can't see how they designed such a silly unit that frys itself when power is lost !

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Totally stupid

Removed fuse 49, but no joy with sat nav Owt else ?

as per my first post.....when disconnected the battery, did you wait a minimum of 3 minutes for the systems to sleep first???

as per my first post.....when disconnected the battery, did you wait a minimum of 3 minutes for the systems to sleep first

Yes the truck was shut down for some 15 minutes or so before I disconnected the battery,but what difference does it make any way ?

nephro said:

Yes the truck was shut down for some 15 minutes or so before I disconnected the battery,but what difference does it make any way ?

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Not just engine off, but not opening or closing any doors, tail or bonnet as these acts will reawaken the Car and you'll have to wait another 3 minutes....

The waiting is critical to allow the Sat Nav to write data to its flash memory about certain things, allows the Fuel Level indicator to write information to the IKE (Instrument Cluster), BCU and LCM....

Other systems also have a 'write to memory' period following vehicle sleep phase....

Not waiting 3 minutes can corrupt the Flash Memory in the Sat Nav unit....this has been noted on numerous forums and is not only applicable to the L322...the BMW's the L322 is based upon also suffer the same fate....

So yes, my question is very critical as the answer will make a difference...

If the vehicle was left to sleep for your 15minutes WITHOUT opening or closing any doors or turning the ignition on...AND the red light was OFF on the Sat Nav unit BEFORE you disconnected the battery then your unit may be sound and you'll have to look elsewhere for the cause - i.e. dampness or corroded connections....BUT if you didn't wait and/or check the vehicle was properly asleep before you disconnected the battery...there is a possibility you have fried the Sat Nav flash memory....

I will see if I can attach the Service Sheet about battery disconnection for you to read.

EDIT: Pictures Attached.....

Many thanks for that information Saint. I climbed my ladder and looked at the shark fin antenna,( I shouldn't have done really as I'm approaching 80 ) only to discover that it is smashed inwards as if a roof box has been sat on it.

I rather think that will have something to do with my sat nav NOT working.

Where can I get a shark fin antenna from ?

nephro said:

Many thanks for that information Saint. I climbed my ladder and looked at the shark fin antenna,( I shouldn't have done really as I'm approaching 80 ) only to discover that it is smashed inwards as if a roof box has been sat on it.

I rather think that will have something to do with my sat nav NOT working.

Where can I get a shark fin antenna from ?

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ebay or straight from a landrover dealership

Sorted. My local indi in Atherton Gtr Manchester supplied and fit £112-80.

All working great again.

Many thanks to those who answered my enquiry.