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Old 12-08-2012, 11:48 PM   #1
Quadrant5
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MDK issue leads to DME suspicion

Hey guys, I could use your help on this one.

I have a 2000 323i 4 door with manual transmission. A couple of months ago I pulled away from a stop light when the EML and DSC lights came on. The MDK (throttle body) also was put into Emergency Operation 2, which allowed me to limp home at 20 MPH.

I ran the codes to see what was wrong. I donít remember exactly which ones came up, but it pointed to the throttle position sensor, which is located inside the MDK. I replaced the MDK with a used one, which didnít work. I replaced that one with a new one, which didnít work. I replaced that one with another new one, which didnít work. It is of interest that when I use my new MDK, the car is in Emergency Operation 1, and occasionally slips into Emergency Operation 2. When I use my original MDK, it stays in Emergency Operation 1. At least I can get to work at 50 MPH.

I have checked, rechecked and rechecked the wiring and found no issues. That led me to believe that maybe there was a problem with the computer. However, I seem to remember that somewhere I read that you werenít supposed to replace the computer under any circumstances (that is, when trying to fix the MDK). That led me to the stealership.

BMW wanted $1,700 to replace the computer. That led me to try to research how to do it myself. I purchased a used computer online and read on the forums how to replace it. I know the EWS system is a challenge when doing this. So I thought I would try flashing my computer using WinKFP using daten 7526765. I had hoped that maybe the programing was corrupted somehow and that flashing it would help. It didnít.

I know that if I want to use the computer I purchased I will have to buy more stuff to deal with the EWS system, which I would rather not do. This is where I could use your help.

Does anyone have experience with a similar problem?

Does anyone have any suggestions on what I might try before getting into reprograming the used computer?

I do have INPA, WinKFP, SSS Progman, NFS, Tool32, NCS Expert and DIS V52 to work with.

Help me Obi-Wan Kenobi, youíre my only hope.
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Old 12-09-2012, 07:35 AM   #2
Zchild
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Not so fast my friend... I too drive a 00 E46 323i and when I had the same exact codes in my bimmer it turned out that my throttle body was sealed shut by carbon build-up. It was so bad I had to use a hammer and chisel to initially open the flap. So before you go out and purchase a new ECU or re-flash your DME take a little time and clean your throttle and idle control valve while you're in there... Just my two and a half cents worth!
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Old 12-11-2012, 11:30 PM   #3
Quadrant5
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Quote:
Originally Posted by Zchild View Post
Not so fast my friend... I too drive a 00 E46 323i and when I had the same exact codes in my bimmer it turned out that my throttle body was sealed shut by carbon build-up. It was so bad I had to use a hammer and chisel to initially open the flap. So before you go out and purchase a new ECU or re-flash your DME take a little time and clean your throttle and idle control valve while you're in there... Just my two and a half cents worth!
Yeah, I tried that. No dice.
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Old 12-12-2012, 12:05 AM   #4
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Did you follow the reset instruction at the bottom of the link after installing the new MDK? DIS will be the one to use.

http://tis.spaghetticoder.org/s/view.pl?1/06/04/50
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Old 12-20-2012, 11:58 PM   #5
Quadrant5
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Originally Posted by dslboomer View Post
Did you follow the reset instruction at the bottom of the link after installing the new MDK? DIS will be the one to use.

http://tis.spaghetticoder.org/s/view.pl?1/06/04/50
Sorry, your link is not valid.
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Old 12-21-2012, 09:35 AM   #6
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Originally Posted by Quadrant5 View Post
Sorry, your link is not valid.
Where were you for last 10 days?
Sadly the spaghetticoder.org took down E46 service manual since yesterday.
That's real bummer!
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Old 12-21-2012, 09:40 AM   #7
Gus330vrum
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Quote:
Originally Posted by dslboomer View Post
Where were you for last 10 days?
Sadly the spaghetticoder.org took down E46 service manual since yesterday.
That's real bummer!
:/ oh no!

Last edited by Gus330vrum; 12-21-2012 at 09:40 AM.
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Old 12-21-2012, 11:13 AM   #8
Quadrant5
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Originally Posted by dslboomer View Post
Where were you for last 10 days?
Sadly the spaghetticoder.org took down E46 service manual since yesterday.
That's real bummer!
Unfortunately I have been out of town and very busy. I do believe that you were encouraging me to reset my adaptations using DIS. If that is so, I assure you that I did do that.
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Old 12-21-2012, 12:02 PM   #9
dslboomer
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Originally Posted by Quadrant5 View Post
Unfortunately I have been out of town and very busy. I do believe that you were encouraging me to reset my adaptations using DIS. If that is so, I assure you that I did do that.
I think that was it. I didn't read through it though.
If you did that with a new MDK, and you still have problem, I think you should start fresh. What codes do you have?
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Old 02-01-2013, 07:43 PM   #10
Quadrant5
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Originally Posted by dslboomer View Post
I think that was it. I didn't read through it though.
If you did that with a new MDK, and you still have problem, I think you should start fresh. What codes do you have?
Sorry, I've been busy, again. I do appreciate your efforts to help. It was a long time ago that I looked at the exact codes. One was, I believe, 169. That just indicates a MDK problem as I recall. The other, I think, was 114. That has to do with a bad signal being sent to the DME from the MDK. Or was it that the redundant potintiometers did not agree with each other? Either way, it seems that the issue is that the MDK is sending the wrong signal (bad MDK), or the signal is not reaching the DME (wiring or connection issue), or that the DME itself is not interpreting the signal right (DME problem).

I don't think it is the MDK, as I have replaced it twice with brand new units and still have my problem.

I don't think it is the wiring because I have checked and double checked and tripple checked it with no problems. Plus there is no evidence of bad connections.

That leaves the DME itself. That also agrees with what the dealership told me when I took it in to them.

Any suggestions?

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