Battery dies overnight
#61
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Originally Posted by methodsound' post='1054195' date='Nov 13 2009, 05:15 PM
This amp meter I mentioned is the solution to your problem trying to measure the amps with your multi meter. It does not require the battery connection to be disconnected.
It sounds like the dealer said your trunk light was staying on due to the faulty trunk hatch trigger? Is that what the drain turned out to be? The reason I ask is that the car will shut off the trunk light if you leave the trunk open, so maybe the trigger was intermittent and the car was waking up thinking you were opening the trunk?
It sounds like the dealer said your trunk light was staying on due to the faulty trunk hatch trigger? Is that what the drain turned out to be? The reason I ask is that the car will shut off the trunk light if you leave the trunk open, so maybe the trigger was intermittent and the car was waking up thinking you were opening the trunk?
I had sometime yesterday to mess with the car. I got a clamp on dc ammeter from a buddy. I disconnected all the small wires on the pos and neg bat term. Amp draw didn't change. After 45min of not touching anything car did not go to sleep.
Today I got the scan tool. I read the codes and there where codes in almost every system. I cleared the codes and they all come right back. I now have an airbag light.
I tried registering the battery but ran out of time to do it.
Where can I get fault code data and testig data? I'm more confused then ever. Thanks
#62
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Originally Posted by skibarefoot' post='1054254' date='Nov 13 2009, 06:26 PM
I had sometime yesterday to mess with the car. I got a clamp on dc ammeter from a buddy. I disconnected all the small wires on the pos and neg bat term. Amp draw didn't change. After 45min of not touching anything car did not go to sleep.
Today I got the scan tool. I read the codes and there where codes in almost every system. I cleared the codes and they all come right back. I now have an airbag light.
I tried registering the battery but ran out of time to do it.
Where can I get fault code data and testig data? I'm more confused then ever. Thanks
Today I got the scan tool. I read the codes and there where codes in almost every system. I cleared the codes and they all come right back. I now have an airbag light.
I tried registering the battery but ran out of time to do it.
Where can I get fault code data and testig data? I'm more confused then ever. Thanks
Where did my helpers go? I got the scanning/test tool and was playing with it. I got codes I have no idea what to do with. Thanks.
#63
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Sorry I can't help with your specific problem.
My 08 had a similar problem. The car died every 7 days like clockwork.
Under warranty the dealer diagnosed and replaced the main 'comfort access' module, then the electronic gear shift. The problem persisted until it was revealed that the previous owner had had a "boomerang" anti-theft system installed. The car was persistantly waking up to phone the alarm company about its 'stolen' location.
Boomerang was removed by Boomerang at BMW request.
Problem solved.
BTW a battery can only take so many discharges until it fails completely. In one month BMW replaced the battery twice.
My 08 had a similar problem. The car died every 7 days like clockwork.
Under warranty the dealer diagnosed and replaced the main 'comfort access' module, then the electronic gear shift. The problem persisted until it was revealed that the previous owner had had a "boomerang" anti-theft system installed. The car was persistantly waking up to phone the alarm company about its 'stolen' location.
Boomerang was removed by Boomerang at BMW request.
Problem solved.
BTW a battery can only take so many discharges until it fails completely. In one month BMW replaced the battery twice.
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Originally Posted by skibarefoot' post='1054993' date='Nov 14 2009, 08:58 PM
Where did my helpers go? I got the scanning/test tool and was playing with it. I got codes I have no idea what to do with. Thanks.
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What scanner did you buy and whom did you get it from?
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Originally Posted by skibarefoot' post='1054993' date='Nov 15 2009, 04:58 AM
Where did my helpers go? I got the scanning/test tool and was playing with it. I got codes I have no idea what to do with. Thanks.
So this raises the question of how to take current measurements before and after sleep mode.I think you would have to bring 2 wires out of the locked trunk to be 100 % sure.
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I had the same problem last year and bought a new battery and put it in myself. Almost a year later same problem. The end result is that when putting in a new battery it has to be registered to the car which i did not do last year. After a fresh battery and registered to the computer all is fine. The car actually runs a lot better now. More crisp throttle response and smooth running engine.
#67
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Originally Posted by bimmer722' post='1056412' date='Nov 16 2009, 10:32 PM
I had the same problem last year and bought a new battery and put it in myself. Almost a year later same problem. The end result is that when putting in a new battery it has to be registered to the car which i did not do last year. After a fresh battery and registered to the computer all is fine. The car actually runs a lot better now. More crisp throttle response and smooth running engine.
Another member has been helping me greatly troubleshoot through emails. We are trying to figure out what module powers what fuses. I also got a bunch of codes across multiple systems. We think something is awake or just drowsy when the car is indicating it is asleep. We are hoping once we figure out what is in common with the codes and fuses we should have the problem solved. Easier said then done.
The scan tool I bought is Auto Enginuity. It runs on your computer. www.autoenginuity.com I have it for my truck and it works very well. We'll see how it does on the 5er.
If anyone else has the BMW specific codes, wiring prints, fuse power info etc. please let me know.
For access to the car while asleep I have the trunk, passenger and driver doors opened and the glovebox light diconeccted. I then flip the latches on the doors. This is the same as closing the doors.
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Originally Posted by skibarefoot' post='1056422' date='Nov 17 2009, 03:49 AM
For access to the car while asleep I have the trunk, passenger and driver doors opened and the glovebox light diconeccted. I then flip the latches on the doors. This is the same as closing the doors.
#69
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Originally Posted by tooltec' post='1056590' date='Nov 17 2009, 03:30 AM
What about the boot latch?Surely you should use your remote to lock everything (including the fuel flap) and set the alarm? Otherwise,the car may not go into sleep mode.
forgot to list those. all the latches are closed I did set the alarm too.
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