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E60 520d High Battery Drain

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Hi Guys

E60 520d 2007 lci

This is driving me crazy. Had the car for about 5 months until this problem occurred. One day i woke up and saw a high battery drain on my idrive. That particular day it was cold but the car started everytime displaying the high battery drain message and the time will reset. 

Drove the car for about a month after that message and it was ok until one morning the car wouldn't start at all. no dash lights nothing. Would only jump start using another vehicle. The car would then drive fine the whole day until i leave it over night for about 7 hours. 

So i did some research online and alot of people pin pointed out to a faulty IBS sensor or a bad battery. They were both changed and it made no difference. For some reason the car if not going to sleep. did a few test with multi meter and is currently draining at 6amps. Fulling out the fuse one by one and found that the fuse in the glove box - Fuse 41 -7.5 , when i take that out the amp does drop to 0.85MA

Recently had leather seats installed and came with air bag error but i cleared it with inpa. Passenger seat mat seems to be faulty ,would this have anything to do with it?

Inpa codes found:

SZL - 951A
DME/DDE - 3F01

Car i currently with local garage and still waiting on investigation.
BMW at Harold Wood had the car for 2 days and could not find the fault. They charge £180 an hour so i gave up after the 2 days. costing me alot of money already.

Any help will be much appreciated.

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18 hours ago, Rcaddicted said:

Do you use any Bluetooth diagnostic tools in your obd2 socket?

Sent from my HUAWEI VNS-L31 using Tapatalk

i dont use any Bluetooth diagnostic. 

Got a call this morning from the garage and they seem to think it is the cas module that is not going to sleep. They want £600 to fix the problem.

i dont think it is the cas.  The fuse box in the glove no41 seems to draw power which is the instrument cluster.

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Right over the weekend i did a parasitic draw test by my self. Let the car sleep for about 30 min. 

Got my multi meter and put it on to the battery and on the ground. The draw was 4.85a. Took each fuse out of the glove box / Rear compartment and found out which fuses caused the draw. having all these fuse out it dropped to 0.32a. The car would start but would the dash lights would stay off, i drive off and central locking, interior lights do not work. 

 

Fuse 18

Fuse 29

Fuse 34

Fuse 74

Fuse 77

 

Does Anyone know what these fuses relate to?

 

I know for a fact the radio fan stays on and draws current. The instrument cluster may have a problem but i dont notice any fault with it.

attached is a fuse diagram from my car. can anyone tell me what they relate to?

E60 LCI 2007 Fuse.jpg

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I really wish that when I had my Micro Power Module replaced, I'd said "can I have the old one, please?"

 

It was stated to me that moving it about made various relays trigger on and off in the boot, and one in particular looked somewhat the worse for wear as the heat from the solenoid was making it look a bit Dali.

 

That to me says "dry joints" in the module. Once upon a time it was de rigueur to go over some of the E34 modules with a soldering iron when they got older - the dreaded LKM for one. Maybe the E60 needs the same.

Edited by e60neindanke
Edited slightly gnomic response.

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Hi

 

Just a quick update. Last night i took out Fuse 34 & Fuse 77. Left the battery connected from 10pm to 7am this morning and the car started.

no battery drain.

Look like my CCC is faulty. The fan stays on which i think is draining the battery. I have ordered an used CCC from eBay. In the mean time i will drive the car like that and monitor the voltage in the evening when the car is sleeping. I just wont have the radio or i drive working.  Will install and get it coded, so i will update you soon. 

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Hi

 

Just a quick update. Last night i took out Fuse 34 & Fuse 77. Left the battery connected from 10pm to 7am this morning and the car started.

no battery drain.

Look like my CCC is faulty. The fan stays on which i think is draining the battery. I have ordered an used CCC from eBay. In the mean time i will drive the car like that and monitor the voltage in the evening when the car is sleeping. I just wont have the radio or i drive working.  Will install and get it coded, so i will update you soon. 

The fan is installed on the rear of the CCC, it plugs into the back of the unit.

Are you sure you need a whole new CCC and not just the fan?

Sent from my SM-N910F using Tapatalk

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3 minutes ago, Medved77 said:

The fan is installed on the rear of the CCC, it plugs into the back of the unit.

Are you sure you need a whole new CCC and not just the fan?

Sent from my SM-N910F using Tapatalk

 

Hi

 

Yes you are right it is at the back of the unit. I couldn't find a fan anywhere so i just purchased a second hand ccc for £95.

i wonder if it is serviceable. i just want the issue fixed. Many garages could not find a fault and kept telling me it was a bad battery. 

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