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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > M Series > E30 M3 (1986-1990)

E30 M3 (1986-1990)

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  #1  
Old 11-10-2013, 02:18 PM
Sircas Sircas is offline
It's the Machine in Me!
Location: Dallas, TX
 
Join Date: Sep 2011
Posts: 74
Mein Auto: 03 745i, 94 840Ci & 88 M3
"Code" displayed! Engine Diabled! I can't crank motor

I have had the battery out of my 1988 M3 for 6-months now! I re-installed the battery! It clicks like the battery was dead (only had terminals connected, not tightened down! Radio displays "CODE". There is now a dead display of the On-board computer screen data (range, anti-lock code, etc.)

No code blinking! No code was entered before battery was removed. I have removed & re-installed the battery several times. I have never had this happen. Even if code was for got! You can remove battery. Wait a few minutes and re-install. The computer is reset. Then she starts. She is Locked out! Just turns & turns & turns.

Any thoughts?

Thanks,
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  #2  
Old 11-11-2013, 05:53 AM
markseven markseven is offline
an audience of One
Location: John 3:17
 
Join Date: Apr 2004
Posts: 7,355
Mein Auto: BMW M Power
Are certain the battery has enough charge to crank the engine?
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  #3  
Old 11-11-2013, 06:30 AM
7pilot 7pilot is offline
Git
Location: i dunno
 
Join Date: Feb 2011
Posts: 252
Mein Auto: 90 Ford Tempo
You need to locate and enter the anti- theft code into the OBC.
You have a pm on that other post location.
You also have to enter the radio code to get that to function as well

m

Last edited by 7pilot; 11-11-2013 at 06:32 AM.
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  #4  
Old 11-11-2013, 06:36 AM
7pilot 7pilot is offline
Git
Location: i dunno
 
Join Date: Feb 2011
Posts: 252
Mein Auto: 90 Ford Tempo
Btw, the code box or immobilzer unit is often problematic, so if there are no start, or stalling issues with the car after the code is entered, then the code box may need to be dealt with...

m
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  #5  
Old 12-15-2013, 06:05 AM
RhoXS RhoXS is online now
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Location: Florida
 
Join Date: May 2008
Posts: 386
Mein Auto: Z3 & X3
I sold my M3 about twenty years ago so this is from long dormant memory cells.

I used the "Code" all the time. If I remember correctly, to demobilize the engine you just entered any four digits into the computer and then to remobilize the engine the same four digits had to be reentered. Every once in a while we would forget what four digits were entered (by "we" I mean my wife). The fix was easy. Open the hood and momentarily remove a fuse. Fuse 9 comes to mind but I cannot validate that after over twenty years.

One day we had the car parked in front of the Jupiter Beach Hilton. We forgot the code and set off the alarm - headlights and horn blinking. I got out, opened the hood, did the fuse thing, closed the hood, started the car and drove away. Not a single person, and there were a lot of people in the area, paid any attention at all to us. Made me wonder how effective car alarm systems really are.

Last edited by RhoXS; 12-15-2013 at 08:09 AM.
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