Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E36/7 Z3 (1996-2002)

E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

Reply
 
Thread Tools Display Modes
  #1  
Old 03-26-2013, 09:33 AM
Pani's Avatar
Pani Pani is offline
Automotive Hypochondriac
Location: Palo Alto, CA
 
Join Date: May 2002
Posts: 152
Mein Auto: 2001 LSB M Coupe
Could a DME flash/update damage the instrument cluster?

Since my repair shop updated my DME, I will intermittently get an EEP_2 error from my instrument cluster. Per my reading, this appears to be a problem with the EEPROM or circuit board of the cluster.

Could this have been damaged during the DME programming? I suspect the high current required for the DME programming may be the cause, but am not sure if this is a common issue.

Thanks,
Pani
__________________
Pani
2001 LSB M Coupe

Reply With Quote
Advertisement
  #2  
Old 03-26-2013, 11:32 AM
Monolith Monolith is offline
Officially Welcomed to the 'Fest
Location: NJ
 
Join Date: May 2008
Posts: 751
Mein Auto: 1997 Z3 1.9L DASC Auto
Anything is possible....but, I doubt the two are related. Is the EEP error temperature related? Typically, it comes and goes at first and eventually becomes permanent. I suspect the solder joints - possibly a write cycle limit has been reached. The EEPROM on the coding plug and the EEPROM on the cluster have to be able to be read and to be written to or you will get the error.

The actual DME programming does not require high current. However, it is recommended that you use a sufficiently sized charger while the programming is taking place to eliminate any chance of a voltage sag.
Reply With Quote
  #3  
Old 03-26-2013, 04:52 PM
Pani's Avatar
Pani Pani is offline
Automotive Hypochondriac
Location: Palo Alto, CA
 
Join Date: May 2002
Posts: 152
Mein Auto: 2001 LSB M Coupe
It is temperature related. Based upon JWin's experience over on Bimmerforums, it sounds like I better get it addressed now before it becomes permanent.

Thanks for the info,
Pani
__________________
Pani
2001 LSB M Coupe

Reply With Quote
  #4  
Old 03-26-2013, 05:00 PM
Monolith Monolith is offline
Officially Welcomed to the 'Fest
Location: NJ
 
Join Date: May 2008
Posts: 751
Mein Auto: 1997 Z3 1.9L DASC Auto
Yes, he has a thread on it on the other forum. He's got my curiosity up about what is causing this error. The chips themselves can be removed and I believe that is what BMW in NJ is doing. The problem is not extremely common but also not rare. As these cars get older we'll probably see more of these errors.

The temperature dependency leads me to think that it could be bad solder joints.

Last edited by Monolith; 03-26-2013 at 05:01 PM.
Reply With Quote
  #5  
Old 03-27-2013, 05:49 AM
coopers coopers is offline
Registered User
Location: Massachusetts
 
Join Date: Jul 2004
Posts: 49
Mein Auto: 2001 Z3 2.5i
Eep_2

I have been the only owner of my 2001 Z3. I have had the EEP_2 condition on two occasions. The first was under warranty and really didn't pay attention to the repair. The second time was about a year and a half ago. I wanted to find a repair solution that I could DIY.

When EEP_2 appeared, none of the gauges worked. This was during winter. After driving the car and giving the car a thorough warm up, the condition would disappear and everything worked. I began to suspect some sort of thermal issue in the cluster. As you are aware, there isn't much EEP_2 info out there. One solution was replacing the coding plug. It took several months to find out that BMW no longer supplied coding plugs. I finally braced myself to replace the instrument, which now run over $1000 (rebuilt). I decided to take a take chance on a visit to the dealer. I was willing to take the chance of a couple of hundred dollar dealer diagnosis against $1000 for a rebuilt cluster.

The dealer told me the cluster needed to be reprogrammed. I still don't know what that means. $150 later the problem was gone. That is the happiest that I had been at a dealership since picking my Z3.

The dealership was BMW of Sudbury MA, which had purchased Foreign Motors, the dealer that I had purchased the car from.
Reply With Quote
  #6  
Old 03-27-2013, 07:41 AM
Monolith Monolith is offline
Officially Welcomed to the 'Fest
Location: NJ
 
Join Date: May 2008
Posts: 751
Mein Auto: 1997 Z3 1.9L DASC Auto
There was some info that the eep errors refer to an internal eeprom error. Copying the info from the chip, erasing the chip and then copying the info back seems to set it straight. The initial corruption is probably from a thermal issue either with the chip or solder joints. The fact that you had it eventually reoccur supports this theory. Having a database of the chip numbers would be useful in diagnosis.

The eeprom chips hold mileage and service interval information. I'm not sure if the vehicle parameters (US version, Z3, engine size, etc.) are actually stored on the same eeprom chip or just on the "coding plug" as a whole.

Last edited by Monolith; 03-27-2013 at 07:51 AM.
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > Z Series > E36/7 Z3 (1996-2002)
Today's Posts Search
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On



Forum Jump


All times are GMT -7. The time now is 03:21 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms