04 X5 won't start. Code light comes on

[2555 john]

I did reinstall fuse 43...This is what happened..
After car started I put fuse in with car running..I got all my instr. back but alarm came on for about 20 secs than stopped..Car stayed on...

Not wanting to risk anything I pulled the fuse.while car was running.....Car ran normal..I had instr. and full power steering
..When I turned it off, daytime running lights and rear brake lights stayed on...

Went to start car 10 mins later...Would not start.....Put fuse 43 back in...Still would not start....Waited about a minute..Pulled fuse 43, went to start, and it started..

Using the car this way sparingly until I get it diagnosed....Leaving fuse 43 out...

[upallnight]

Originally Posted by Qsilver7

The emergency deactivation procedure for the OBC code is a one time thing...but that's because the OBC code is a one time thing. And yes to upallnight...this procedure would apply to all BMWs that had the HIGH instrument cluster and HIGH MID or NAV system which had the programmable OBC code feature (e32/e34/e38/e39/e53).. If the the car is only equipped with the LOW cluster and MID...then it will not have this feature.

This additional anti-theft feature can only be input after each shut down...then the "same" code that was entered to prevent the starting of the car by someone that has a working key...would need to be re-entered before the car would start up. It (the code) does not remain in memory...and if you wanted to "protect" the car again with a specific CODE...you'd need to enter it again the next time you shut the car down.

The emergency procedure that was posted...is the go-around when the CODE that was entered was forgotten...or unknown after an offspring or friend was playing around with the MID or Nav and entered a code but didn't know what was going to be the outcome and didn't remember what they had entered.

The odd thing about this feature...is that over the decades there have been examples where certain conditions has caused the IKE/OBC to throw up this CODE in the display and shut down starting. But it has normally been around some aftermarket install or an odd loss of power and the owner has had to enter 0000 or 0123 to get the car to start.

In this case, it appears pulling fuse 43 is bypassing the ignition/starter shut down. But again, I wonder if there's something with the aftermarket radio's wiring that is causing the OBC to shut down starting.

In regards to the OP reinstalling the original set-up...it needs to be determined what that set-up was. Did the vehicle originally come with the MID and indash CD or CASS unit (which is where the radio turner is incorporated)...or did it come with the NAV screen...which means that the radio tuner is installed in the rear left side of the trunk (near the CD changer & amp).

If the original set-up was the MID and indash unit...then there's two components that will need to be retrieved. If it came with the Navigation screen...then as mentioned...the original radio may still be installed in the trunk area and is just disconnected.

As always a plethora of knowledge from you.
My X didn't have the High Instrument cluster and I never activated the OBC code on my E34.

[Qsilver7]

Originally Posted by upallnight

...My X didn't have the High Instrument cluster and I never activated the OBC code on my E34.

...speaking of your e34's OBC...made me think of the good ol' days...so went digging in my pic stash and found my old 91 735iL's OBC w/CODE feature.

[Clockwork]

Originally Posted by Qsilver7

...speaking of your e34's OBC...made me think of the good ol' days...so went digging in my pic stash and found my old 91 735iL's OBC w/CODE feature.

Just for fun I use my CODE on my e31 from time to time


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[2555 john]

I wish I knew what you guys were talking about with all this tech stuff...
One of my other cars is an old corvette convertible with a fully forged motor matted to a 4 speed..I'm old school..I have no idea about scanners or anything..


My X5, I'm still driving around with fuse 43 out so the car will start.....I'm bringing it in this week to someone who should be able to diagnose it....Like I said, should.

Of course now I have an antifreeze leak and it turns out the valley pan needs replacing..Wonderful...I wouldn't even attempt this....Meanwhile to change an intake and gasket on my vette I can do no problem..

This will be the second time this manifold will come off....First time was to repair and oil leak...

I bought this X5 almost 5 years ago..It was a one owner car with 100K on it....Great looking truck....M edition has the wide fender flares which you don't see and the 20 inch wheels with the five star rim...

Always took care of it but now its just getting to be a money pit somewhat..

Like I said I'm not a tech guy....I don't understand all this scanner nonsense..

This is my second BMW..My first was an 02 330 ci 5 speed that never never gave problems like this X5....Between constant electrical problems to oil burning to oil leaks and now it needs a valley pan ( wonderful) I will never by a BMW truck again.....