Car Will Not Start After Suspension Work

[gjm120]

Off and on since Friday I've been working on my suspension. Finally finished this evening and went to take a ride but no start.

Pulled codes and I've got AA559 power supply has been switched off - closed circuit current cutoff relay.

I searched online and found out one of the causes of this fault is the car being awakened too many times in a certain time interval. Jeezus - is my car not starting b/c it didn't get enough shut-eye?

Anyone experienced this and know how to fix it?

[1and1]

Probably already found this, and I don't have enough coffee yet to digest the whole thing, but the following seems to have some info on that code-

https://www.bimmerforums.com/forum/s...ry-Please-Help

[gjm120]

Found that and some more TIS info-

https://www.newtis.info/tisv2/a/en/e...lation/XBybvmN

I did hear the car wake up quite a few times. I've got CA and had the key near me which was obviously a mistake.

I put the car on CTEK a charger overnight and all looked good (green light is on). Start-up was completely normal!

This is the craziest thing I've come across on the car. Hopefully others read this and learn a lesson! If I didn't have a code reader [more] panic would have set in.

[mr.fabulous]

Originally Posted by 1and1

Probably already found this, and I don't have enough coffee yet to digest the whole thing, but the following seems to have some info on that code-

https://www.bimmerforums.com/forum/s...ry-Please-Help

cars have gotten too complicated, I miss my E36

[methodz]

Originally Posted by gjm120

Off and on since Friday I've been working on my suspension. Finally finished this evening and went to take a ride but no start.

Pulled codes and I've got AA559 power supply has been switched off - closed circuit current cutoff relay.

I searched online and found out one of the causes of this fault is the car being awakened too many times in a certain time interval. Jeezus - is my car not starting b/c it didn't get enough shut-eye?

Anyone experienced this and know how to fix it?

Out of curiosity when you were working on your suspension where was your key?

I once washed my car with the keys in my pocket and as I circled the car I kept hearing strange noises and when I went to start it, it was dead. So now when I wash my car I pull the laser cut key out and leave the fob in the car and no more problems. Also when I had my car washed at work I came back to a low battery warning because I assume the car wash guy had the keys in his pocket. It sucks that this happens, I always have to tell him not to do that and I'm sure he thinks I'm being an asshole.

[gjm120]

Originally Posted by methodz

Out of curiosity when you were working on your suspension where was your key?

I once washed my car with the keys in my pocket and as I circled the car I kept hearing strange noises and when I went to start it, it was dead. So now when I wash my car I pull the laser cut key out and leave the fob in the car and no more problems. Also when I had my car washed at work I came back to a low battery warning because I assume the car wash guy had the keys in his pocket. It sucks that this happens, I always have to tell him not to do that and I'm sure he thinks I'm being an asshole.

Most of the time the key was in the garage near the car. And I did hear the car wake up quite a few times.

I think this shutoff "feature" exists so if a module keeps the car from sleeping, instead of the battery being drained b/c the car can't sleep, it just shuts everything down.

[gjm120]

I did it again. Replaced front pads and rotors and rear pads this morning. Since it was a short job I didn't worry about where the key was. Same symptoms, same codes. This is really annoying.

[StuP]

Originally Posted by mr.fabulous

cars have gotten too complicated, I miss my E36

I agree, I'm seriously considering going back in time for my next car. One with the minimum of computers.

I'll forgo the bells and whistles in exchange for the ability to do much more work myself.

[gjm120]

I should have learned from methodz experience (post #5 above) that this can happen easily. He was just washing the car.

[Gangplank]

Or don't get a car with comfort access.

[gjm120]

Originally Posted by Gangplank

Or don't get a car with comfort access.

Amen. Certainly would have skipped it if I had ordered the car. I'm sitting here now wondering how long my car needs to sleep before it will stop being finicky and start up!!

[Gangplank]

I'd check your battery health also. Just sayn

[StuP]

Originally Posted by Gangplank

Or don't get a car with comfort access.

Can it be coded 'off' ? I thought I saw a 'master' switch in the coding somewhere.

[gjm120]

Originally Posted by Gangplank

I'd check your battery health also. Just sayn

I haven't load tested it but checked voltage after a drive, after a long sit and all looks good.

Just need to remember that even washing the car with the key in pocket can cause this silliness.

[StuP]

Originally Posted by gjm120

I haven't load tested it but checked voltage after a drive, after a long sit and all looks good.

Load test is a must, static voltage isn't a good indicator.

[gjm120]

Originally Posted by StuP

Load test is a must, static voltage isn't a good indicator.

I know but only have a multimeter. Any idea if the relatively cheap load testers are good?

[gjm120]

Originally Posted by Gangplank

I'd check your battery health also. Just sayn

You were spot on. Battery died today. When I got the car over 2 yrs ago when playing with the stereo and other accessories I got a battery discharge warning. Been using a CTEK since, but, I guess the time was up.

[KNS]

Originally Posted by mr.fabulous

cars have gotten too complicated, I miss my E36

The exact reason I don’t want to sell my high mileage E46.

[Gangplank]

Originally Posted by gjm120

You were spot on. Battery died today. When I got the car over 2 yrs ago when playing with the stereo and other accessories I got a battery discharge warning. Been using a CTEK since, but, I guess the time was up.

Glad you got it sorted out. Modern BMWs do strange things when the battery gets low. I learned this with my E60 545. That car would literally freak out and throw random codes when the battery was on its way out.

[blue135]

The strange stuff with a dying battery is not limited to just BMW, i.e., Chevy Colorados are known to have weird window, door lock, gauge issues that are immediately corrected with a new battery.

[gjm120]

I guess all cars have gotten so complicated.

FYI - got a Everstart Maxx H8 at Wally World for around $123+ core. Even if they are not the best batteries, at that price and a 3 yr replacement wtty = good deal.

It was actually less than the H7. I guess because not a very common size. It's huge but fit in the hole with no problems.