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E34 (1989 - 1995)

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  #1  
Old 09-05-2012, 02:26 PM
luger348 luger348 is offline
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Location: Allentown, PA USA
 
Join Date: Sep 2012
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Mein Auto: 1995 BMW 540i
540i security problems

I bought a 1995 540i a couple of years ago and it has begun to "let me down" without warning. I hit the security off button on the key and I receive the normal "Beep Beep" that the security system is off, the doors unlock, etc. When I try to start the car, it cranks, but the fuel system does not work. I have had it to a mechanic 2 times in as many weeks and he tells me it is a problem with the security system disabling the fuel system. He told me he wasn't certain how to alleviate the situation, as he had a colleague get my car to start. He told me his colleague said I will not have a problem as long as I hear the 2 "Beeps" when I disarm the security system. Well, this morning I heard the 2 "Beeps" but the car would not start. I cannot continue changing my work schedule and renting cars whenever my beemer decides it wants to stay home. I don't want to get rid of my beemer, but I need something that won't leave me stranded (without any warning) in a bad part of town. Any suggestions?
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  #2  
Old 09-05-2012, 03:49 PM
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M540FELLA M540FELLA is offline
Josh
Location: Chatt,TN
 
Join Date: May 2012
Posts: 797
Mein Auto: 95 540i m sport
Pull the fuse on the alarm module, first pull up your back seat, then on the drivers side look with a flash light in the hole that the back seat
locks into, you should a blue fuse. Grab a set of needle nose pliers and pull the fuse. However doing this will disable your obc on your dash.
This is just a quick fix, if you find an indy bmw mechanic with a gt1 diagnostic system they maybe able to fix your alarm completely
Here's a picture
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Last edited by M540FELLA; 09-05-2012 at 03:50 PM.
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  #3  
Old 09-05-2012, 04:50 PM
luger348 luger348 is offline
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Location: Allentown, PA USA
 
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Mein Auto: 1995 BMW 540i
Didn't work

I tried as you suggested (I have a brown 5A ) But it didn't work. However, I don't understand the acronyms.... obc? Auto repair is something I do by necessity, I don't have enough money to do it for fun. Do you have any other suggestions? If not, Thank you very much for trying to help me.
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  #4  
Old 09-05-2012, 05:03 PM
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M540FELLA M540FELLA is offline
Josh
Location: Chatt,TN
 
Join Date: May 2012
Posts: 797
Mein Auto: 95 540i m sport
With all doors, windows, sunroof, hood, trunk shut....
  • Unhook the negative battery terminal
  • Replace the blue fuse
  • Let sit for 5 mins
  • Hook up the negative terminal again
  • Alarm will sound
  • Insert key and move to position 1 (also tried position 2)
  • Leave for 15 mins
  • Start the car
Obc mean on board computer, it's the little system next to your radio.
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Last edited by M540FELLA; 09-05-2012 at 05:07 PM.
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  #5  
Old 09-05-2012, 05:23 PM
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shaftdrive shaftdrive is offline
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Quote:
Originally Posted by luger348 View Post
II cannot continue changing my work schedule and renting cars whenever my beemer decides it wants to stay home. I don't want to get rid of my beemer
What beemer are you talking about?
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  #6  
Old 09-05-2012, 05:42 PM
luger348 luger348 is offline
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Location: Allentown, PA USA
 
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Mein Auto: 1995 BMW 540i
@M540FELLA I attached the negative & replaced the fuse. There was no audible alarm but other than no sound, the alarm functioned. I put the key in and turned it, but the 4 ways continued to flash. I had to turn the 4 ways off with the console switch. Now, I have the ignition in position 1 with all doors, etc. closed. I did not lock the doors though. I'll try it in 15 minutes and let you know what happened.
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  #7  
Old 09-05-2012, 05:53 PM
luger348 luger348 is offline
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Location: Allentown, PA USA
 
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Mein Auto: 1995 BMW 540i
It didn't start. When I tried to lock it before I came inside, I hit the key button and it beeped 3 times. The doors didn't lock all the way, so I locked them manually. Then I tried the unlock on the key button and it didn't unlock or make any sound. Now what can I do... if anything?
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  #8  
Old 09-05-2012, 06:56 PM
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M540FELLA M540FELLA is offline
Josh
Location: Chatt,TN
 
Join Date: May 2012
Posts: 797
Mein Auto: 95 540i m sport
I don't know what else man. These are all I ideas I got from other sites.
Maybe this
1. go to passenger side and insert key
2. lift up & hold the handle while turning key to emergency unlock position
Sometimes you have to pump the handle (while turning the key) to get the normally electronically acutated lock to move.

If the passenger side fails...try the same procedure on the driver's side...just remember that the lock turns in the opposite direction to unlock:


(Note: the diagram is for illustrative purposes only...your 94 e34 locks are slightly different in that it does NOT have a single lock position AND probably doesn't turn as far...but it should give you the gist of what needs to be done)

Oh yeah...since you set the alarm with the keyless entry...when you manually unlock the doors...the alarm is going to sound off...so be prepared to do the emergency DEACTIVATION of the alarm:

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  #9  
Old 09-05-2012, 07:15 PM
luger348 luger348 is offline
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Location: Allentown, PA USA
 
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Mein Auto: 1995 BMW 540i
Thanks for trying so hard to help me. I'll try the door lock before I walk to the rental car place in the morning. I am grateful for your efforts.
Harry
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  #10  
Old 09-05-2012, 07:23 PM
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M540FELLA M540FELLA is offline
Josh
Location: Chatt,TN
 
Join Date: May 2012
Posts: 797
Mein Auto: 95 540i m sport
Well I'm sorry it wouldn't work out for you. Good luck and if you do get it started again don't arm the alarm again and pull that fuse on the module for good. You'll just have to unlock and lock the car with the key. I truely hope you get it started man, the 540i is a great car, but the alarms are just really wonky. Mine doesn't work at all any more.
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  #11  
Old 09-13-2012, 03:53 PM
luger348 luger348 is offline
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Location: Allentown, PA USA
 
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Mein Auto: 1995 BMW 540i
I just got it back from a really good repair shop. They told me they couldn't communicate with the diagnostic system at all. I went through the laundry list of problems I had with the car and I guess it gave them a clue as to where to look for the problem. It turned out that it was a main relay and they replaced it for only $115. Hell, I sp4ent more on the rental car. Anyway, she's back home now and running well... so far. Thanks for all your help, you really tried for me. Thanks, Harry
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  #12  
Old 09-13-2012, 03:59 PM
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M540FELLA M540FELLA is offline
Josh
Location: Chatt,TN
 
Join Date: May 2012
Posts: 797
Mein Auto: 95 540i m sport
Awesome glad it was an easy fix. That's what we're here for to help out our fellow bmw brethern.
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alarm system, immobilizer, security system, won't start


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