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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 01-21-2012, 03:46 PM
reo11 reo11 is offline
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Mein Auto: 1999 E39
EML and what is this thing?

Every since I blew a fuse this summer, my 1999 E39 528 (production date 09/98 with M63 in the VIN) has been drivin' me nuts. Now my EML & Check Engine lights are on and the poor thing can't get out of its own way. Had it scanned at BMW Dealer in Little Rock, and they are of the opinion that it may be throttle related. But the weird thing is, this car has an accelerator cable, not drive by wire, as everyone say it should have. So in looking to see what I might be able to do for myself again (I generally turn wrenches myself), I noticed this thing, which inserts into the side of the intake, was a bit loose and missing the bolts to hold it snug.

Since the car has a mechanical throttle linkage (cable), is it safe to assume it is not the throttle body? What is this thing and could it being loose the culprit? Is there a TPS on my car somewhere, like the black box on the side of the throttle body? Or could the problem be the Idle Air Control Valve?
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Last edited by reo11; 01-21-2012 at 03:54 PM. Reason: addition
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  #2  
Old 01-21-2012, 04:10 PM
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bcbp14 bcbp14 is offline
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I think that's a DISA valve.
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  #3  
Old 01-21-2012, 04:14 PM
bobdmac bobdmac is online now
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+1. Check the "very best links" sticky for DISA valve problems or symptoms, and see if they match yours.
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  #4  
Old 01-21-2012, 04:20 PM
ProRail ProRail is offline
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Mein Auto: 1999 BMW 528A--165K
Quote:
Originally Posted by reo11 View Post
Every since I blew a fuse this summer, my 1999 E39 528 (production date 09/98 with M63 in the VIN) has been drivin' me nuts. Now my EML & Check Engine lights are on and the poor thing can't get out of its own way. Had it scanned at BMW Dealer in Little Rock, and they are of the opinion that it may be throttle related. But the weird thing is, this car has an accelerator cable, not drive by wire, as everyone say it should have. So in looking to see what I might be able to do for myself again (I generally turn wrenches myself), I noticed this thing, which inserts into the side of the intake, was a bit loose and missing the bolts to hold it snug.

Since the car has a mechanical throttle linkage (cable), is it safe to assume it is not the throttle body? What is this thing and could it being loose the culprit? Is there a TPS on my car somewhere, like the black box on the side of the throttle body? Or could the problem be the Idle Air Control Valve?
Are there no indies in your area? Those guys (Urban Motors in Catonsville MD) have kept my 1999 528 in good condition for many years now. With the age of your car you should definitely build a relationship with a good indie garage.
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  #5  
Old 01-22-2012, 06:54 AM
Jase007 Jase007 is offline
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Mein Auto: e39 528it
You have Siemens Ms v. 42 engine management (1999-200 years) and a partial drive-by-wire throttle.

The cable from the pedal to the throttle body controls potentiometers in the side of the throttle body (MDK) housing.

These pots move the butterfly flap / valve in the MDK.

This electronic motor driven interface was the precursor to true "drive-by-wire" non-mechanical linked throttle bodies that came in 2001 + M54 engined cars) using Siemens Ms v. 43 on the inline six cylinder cars. The MS 43 cars have no bowden cable to the side of the MDK / EDK (motor driven throttle) but DO have potentiometers at the pedal assembly. Ms v. 43 cars throttle body faults can set at the pedal or the MDK / EDK throttle body housing.

When YOU get pedal position faults, it is talking about the pots on the side of the MDK / EDK.

Your partial drive-by-wire system allows for ATC / DSC to intervene and override driver throttle input, by varying the call for throttle based on input from sensors and traction environment. (wheel speed sensors)

528s getting pedal faults typically relate to failed MDK / EDKs (throttle body) which is a non-serviceable item. Car will throw the EML lamp and go into limp home mode ... running up to ~ 1,200 rpm driven by the idle control valve, and not using the MDK / EDK. Other sources for faults are at the twist-lock electrical connection to the MDK / EDK ... after having disconnected to clean your throttle body.

New MDK / EDK requires resetting engine adaptions through a scan tool or the Ediabas / INPA software interface.

Good luck.

* the thing in your pictures is the DISA valve that varies selection of intake runner length to produce max torque when available. It needs to be installed and connected to harness. When they fail, you can shake them and they sound like a bucket of bolts.
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Last edited by Jase007; 01-22-2012 at 06:57 AM.
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  #6  
Old 01-22-2012, 08:48 AM
jygesq jygesq is offline
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Question jason I thought first MY 2000 528 had sept 99 production date

yours was manufactured in /may 1999?
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  #7  
Old 01-22-2012, 09:03 AM
Jase007 Jase007 is offline
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Mein Auto: e39 528it
1999 and 2000 528s with the 2.8L M52TU motor (all of them) have Siemens Ms v.42 engine management.

2001+ 525s with the 2.5L M54 motor (all of them) have Siemens Ms v.43 engine management.

1997-8 528s with M52 motor (non TU or non "Technical Update")have an earlier version of engine management.

The split / break are in the Bentley manual.

We can also note that the engine managment systems for the 540 (v8 motors) have a partial driveby-wire transition throttle system which is the equivalent (bowden cable and no pots at the pedal). I don't have the details handy but issues are the same.
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  #8  
Old 01-22-2012, 10:09 AM
reo11 reo11 is offline
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Location: Arkansas
 
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Mein Auto: 1999 E39
Quote:
Originally Posted by JYG Y2k5285spCT View Post
yours was manufactured in /may 1999?
No, mine was 09/98
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  #9  
Old 01-22-2012, 10:12 AM
reo11 reo11 is offline
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Location: Arkansas
 
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Mein Auto: 1999 E39
Ok, went thru a complete cleaning of the DISA and throttle assembly and installed a new (O.E. from Bumper To Bumper/Standard Motor products - same Bosch part number and everything) Idle Air Control Valve. Found some bolts to secure the DISA, reassembled the works and all appears to be right with the world again. :-D Thanks everybody for the info.
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  #10  
Old 01-22-2012, 04:14 PM
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QSilver7 QSilver7 is offline
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Quote:
Originally Posted by JYG Y2k5285spCT
I thought first MY 2000 528 had sept 99 production date
Actually, the e39 2000 model year in the States was an early roll-out...it started in June/1999. The major significance of Sept/1999 (for the 528) is...that's when the 528i/iT got the 5 speed automatic transmission w/STEPTRONIC gear shifting. The 2000 model year 528i/iTs mfg'd from June-August 1999 still came with the 4 speed automatic tranny and still had the PRND321 gear shift lever which had been used in prior model years.

This info is mentioned in this E39 chart that I've posted before...here it is again:

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Q {BMW CCA Member #191509}
2006 E53 X5 4.4i (Sterling Gray) 12/05 mfg date <<~>> 97 740iL (Arctic Silver) 3/97 mfg date
(SOLD)
99 540iT (Orient Blue) <<~>> 95 525IT (Alpine White)
91 735iL (Schwarz Black) <<~>> 85 325e (Bronzit)

http://imageshack.com/scaled/grid240/822/e38e532ndsigpic.jpg

Last edited by QSilver7; 01-22-2012 at 04:21 PM.
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