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Old 02-20-2011, 08:54 AM   #1
alpine86
2nd Gear Member
 
Join Date: Jul 2009
Location: toronto
Posts: 165
How to confirm if my FSU is failling? Battery drain related



How to confirm if my FSU is failling? Battery drain related

Anyway I had a battery drain problem. I parked my car like 5 days in underground garage and the battery is empty so I can't even open my car with a remote.

I just did a current leak test. Here is the photos.

When my car just opened with a remote (1.4A)



When my car just locked with a remote (before sleep mode)


When my car is in sleep mode






So 40mA is just a BMW regular current usage when it's in sleep mode which I think I don't have parasitic leak.

Now my only assumption is FSU is a fault so my blower is running when no one is in the car for few days. This leads to an empty of the battery.

Is there any ways to confirm that FSU needs to be changed?
There is no visible signs of FSU failing while I drive.

Should I take a fuse which related to a blower so even if FSU is at fault I don't get any drain?

Please help
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