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Thread: EML and ASC lights on? - solved

  1. #26
    Join Date
    Jun 2008
    Location
    SF Bay Area
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    3,773
    My Cars
    Supercharged 850ci
    "Error control unit or trottle valve"

    Much more likely your throttles are bad IMO. That's what I would start with.
    Last edited by dragon850; 09-07-2017 at 01:42 PM.

  2. #27
    Join Date
    Jan 2004
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    Toronto, Canada
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    BMW 850CSi
    Quote Originally Posted by dragon850 View Post
    "Error control unit or trottle valve"

    Much more likely your throttles are bad IMO.
    Yeah that was my first thought too!

    So I got 2 newly refurbished units from Wuffer. Same results...


    Sent from my iPhone using Tapatalk

  3. #28
    Join Date
    Jun 2008
    Location
    SF Bay Area
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    Supercharged 850ci
    Quote Originally Posted by Dr. T View Post
    Yeah that was my first thought too!

    So I got 2 newly refurbished units from Wuffer. Same results...


    Sent from my iPhone using Tapatalk
    Replace the side thats is throwing a code with your old throttle to double check.

    Sent from my SM-G925T using Tapatalk

  4. #29
    Join Date
    Mar 2013
    Location
    netherlands
    Posts
    302
    My Cars
    850 CSI
    eml.....as already emailed (use a different bosch number and swap the eprom..... far cheaper).
    BMW 850 CSI march 1994 (EU spec), SOLD. https://www.classiccars-forsale.com/...94-bmw-850csi/
    BMW 850 CSI november 1994 (EU spec)

  5. #30
    Join Date
    Mar 2019
    Location
    Belgium
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    12
    My Cars
    BMW E31 1990
    Thanks for answering DR T. So the abs pump was the problem? Did you refurbished it or buyed a new one or did you repair it yourself?

    Can you give me more info about this matter because I have now just the same problems with my E31. Thanks

  6. #31
    Join Date
    Jan 2004
    Location
    Toronto, Canada
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    1,330
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    BMW 850CSi
    Sicily, disregard my answer! Sorry, I did replace the abs pump previously but that was not related to this issue.

    It wasn’t until I re-read this thread that I realized what the fix was to this particular problem.....a new EML.

    See my post above. Diagnosed with laptop first and then a replacement EML unit fixed things completely.

  7. #32
    Join Date
    Mar 2019
    Location
    Belgium
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    12
    My Cars
    BMW E31 1990
    Ok thanks for the info

  8. #33
    Join Date
    Mar 2019
    Location
    Belgium
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    My Cars
    BMW E31 1990

    EML and ASC lights on???

    Good evening everybody. So I changed the eml an dme's with a friend his E31 and the problem stays. His car is running well with my eml. We changed also the egs from his car into my car. Same problem and my egs is running well in his car. So I think those to control units are not the problem. Thottles have been refurbished 5000 km ago.

    When the engine is cold the eml lamp stays out until the car is warm. There is enough power but when you do a sprint a release the gaspedal the eml lamp appears. Thas asc lamp is going on after a few 100 meters. When I do the blink asc test I get error 2. When I put out the module the error clears but when putting i back in it comes back. Can ik maybe be a lambda problem. Anyone any idees? Thanks

  9. #34
    Join Date
    Jan 2004
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    BMW 850CSi
    Unfortunately, IMO I think the best way to diagnose this is by running computer diagnostics (DIS/INPA) to locate the fault.

  10. #35
    Join Date
    Mar 2019
    Location
    Belgium
    Posts
    12
    My Cars
    BMW E31 1990
    It seems to be a problem to find BMW dealers in my region in Belgium that have still a working DIS/INPA. For the 3rd time I put out and in the relais in the abs box and than the car rides without any problem for about 20 miles. After that the asc light goes on and also the eml is lightning up. If I don't put out and in the relais the error comes already after 1 mile. What is your opinion? Are the relais the problem? Any advice is welcome. Thanks

  11. #36
    Join Date
    Nov 2014
    Location
    Vena, Sweden
    Posts
    134
    My Cars
    1992 BMW 850ia
    There is an error code that could help you. The code is initiated by pressing the ASC button when turning the iginition to "on", I'm no absolutly sure about the procedure. You can surely find information about this in the repair manuals or some one else might be more informed than I.

  12. #37
    Join Date
    Jan 2005
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    Japan
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    11/88 E32 750iL+98 E36M3
    ABS/ASC blink codes from E32, probably same for E31

    German version:
    ABS/ASC-Blink-Code

    - Bremspedal und Schalter "ASC" gleichzeitig drücken
    - Zündung "an"
    - Bremspedal und Schalter loslassen
    - ASC-LEUCHTE fängt an zu blinken
    BC = BlinkCode

    BC 1 = kein Fehler
    BC 2 = EMS Fehler
    BC 3 = Motronic Fehler (DME/ EMU)
    BC 4 = Drehzahlgeber Fehler hinten links
    BC 5 = Drehzahlgeber Fehler hinten rechts
    BC 6 = Drehzahlgeber Fehler vorne rechts
    BC 7 = Drehzahlgeber Fehler vorne links
    BC 8 = ABS-Magnetventil hinten links
    BC 9 = ABS-Magnetventil hinten rechts
    BC10 = ABS-Magnetventil vorne rechts
    BC11 = ABS-Magnetventil vorne links
    BC12 = ASR-Plungenventil Fehler hinten links
    BC13 = ASR-Plungenventil Fehler hinten rechts
    BC14 = Ventilrelais Fehler
    BC15 = Rückförderpumpen Fehler
    BC16 = Speicherladeventil Fehler
    BC17 = Langzeitfehler Druchüberwachung
    BC18 = Leckage Fehler (Wird auch angezeigt wenn Druckspeicher(Gaspatrone) im ASC+T Hydraulikblock schadhaft ist (zB. leer))
    BC19 = Druck Fehler
    BC20 = Getriebebeinflussung Leitungsfehler
    BC21 = ABS/ASR-Regelgeräte Fehler
    BC22 = TD-Signal Fehler (dürfte Tachoimpuls sein)
    BC23 = Option pin Leitungs Fehler

    Zu BC 22:
    TD Signal Fehler
    Regelgerät Kl. 55
    Zündung aus
    Stecker vom ABS/ASR-Regelgerät und Motronic-Steuergerät Bank links abziehen
    Leitung vom ABS/ASR-Regelgerät Kl.55 zum Motronic- Steuerg. Kl.6 auf Unterbrechung/Plus-/und Masseschluß prüfen.
    wenn i.O.
    Fehlerspeicher Motronic auslesen
    wenn i.O.
    ABS/ASR-Regelgerät tauschen
    -------------------------------------------------------
    Translation, hopefully correct:

    - push brake pedal and ASC switch simultaneously
    - Zündung "an" / ignition on
    - Bremspedal und Schalter loslassen /release brake pedal + ASC switch
    - ASC-LEUCHTE fängt an zu blinken/ASC light starts to blink
    BC = BlinkCode

    BC 1 = kein Fehler / no fault
    BC 2 = EMS Fehler / EMS fault
    BC 3 = Motronic Fehler (DME/ EMU)/ DME/EMU fault
    BC 4 = Drehzahlgeber Fehler hinten links/fault speed indicator rear left
    BC 5 = Drehzahlgeber Fehler hinten rechts/fault speed indicator rear right
    BC 6 = Drehzahlgeber Fehler vorne rechts/fault speed sender front right
    BC 7 = Drehzahlgeber Fehler vorne links/fault speed sender front left
    BC 8 = ABS-Magnetventil hinten links/ABS solenoid valve rear left
    BC 9 = ABS-Magnetventil hinten rechts/ABS solenoid valve rear right
    BC10 = ABS-Magnetventil vorne rechts/ABS solenoid valve front right
    BC11 = ABS-Magnetventil vorne links/ABS solenoid valve front left
    BC12 = ASR-Plungenventil Fehler hinten links/fault ASR plunger valve rear left
    BC13 = ASR-Plungenventil Fehler hinten rechts/fault ASR plunger valve rear right
    BC14 = Ventilrelais Fehler/ fault valve relay
    BC15 = Rückförderpumpen Fehler/ fault recycling pump
    BC16 = Speicherladeventil Fehler/fault storage load valve
    BC17 = Langzeitfehler Drucküberwachung/fault long time, pressure control
    BC18 = Leckage Fehler (Wird auch angezeigt wenn Druckspeicher(Gaspatrone) im ASC+T Hydraulikblock schadhaft ist (zB. leer))
    leakage fault (is also shown when pressure vessel (gas bomb) in ASC_T hydraulic block is damaged (for example empty))
    BC19 = Druck Fehler/ fault pressure
    BC20 = Getriebebeinflussung Leitungsfehler/fault wire transmission
    BC21 = ABS/ASR-Regelgeräte Fehler/fault ABS/ASR control modules ffaulty
    BC22 = TD-Signal Fehler (dürfte Tachoimpuls sein) TD-signal fault (should be the speed impulse)
    BC23 = Option pin Leitungs Fehler/option pin line fault

    Zu/to BC 22:
    TD Signal Fehler/TD signal fault
    Regelgerät Kl. 55/ control unit terminal 55
    Zündung aus /ignition off
    Stecker vom ABS/ASR-Regelgerät und Motronic-Steuergerät Bank links abziehen/disconnect from the ABS/ASR regulator unit and MOTRONIC module bank left the connectors
    Leitung vom ABS/ASR-Regelgerät Kl.55 zum Motronic- Steuerg. Kl.6 auf Unterbrechung/Plus-/und Masseschluß prüfen.
    check the line from ABS/ASR regulating unit terminal 55 to MOTRONIC- control module terminal 6 for interruption/plus-/and ground connection
    wenn in Ordnung / in case that is o.k.,....
    Fehlerspeicher Motronic auslesen/read fault codes from DME
    wenn in Ordnung/in case that is o.k.,....
    ABS/ASR-Regelgerät tauschen/change ABS/ASR control unit
    Shogun tricks and tips for the E32 series are HERE!

  13. #38
    Join Date
    Mar 2019
    Location
    Belgium
    Posts
    12
    My Cars
    BMW E31 1990
    Thanks for your replys. I did that blink check. It is error nr 2 EMS/Fehler EMS Fault. What is the ems? Which module is that?

    When you disconnect the ABS/ASC module the error goes away when you do the blink test but it comes always back.

  14. #39
    Join Date
    Jan 2005
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    Japan
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    11/88 E32 750iL+98 E36M3
    EMS = electronic throttle = Elektronische Motor Steuerung (?)
    somewhere here in the tester user manual it says" The EML/EMS selection is for vehicles with an electronic throttle. .." https://www.snapon.com/Files/Diagnos...AZ0025B42B.pdf

    on a German forum I read that they cleaned the throttle valve and the fault disappeared.
    Maybe you also test the gas pedal throttle potentiometer. http://www.bimmerboard.com/members/r...rottle-pot.jpg
    http://www.bimmerboard.com/forums/posts/694988/
    Last edited by shogun; 04-14-2019 at 04:55 AM.
    Shogun tricks and tips for the E32 series are HERE!

  15. #40
    Join Date
    Mar 2019
    Location
    Belgium
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    My Cars
    BMW E31 1990
    Thank you for the reaction Shogun

    The throttles are refurbished by wokke 2 years ago and I also changed them with a good working E31. Problem stayed.

    I will check for the throttle potentiometer but it is strange that the fault stay away when you put out and in the abs relais.

  16. #41
    Join Date
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    Location
    Japan
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    11/88 E32 750iL+98 E36M3
    E32 Bentley Repair Manual shows the data for testing on page 130-45.

    EML Pedal Position Sensor Test
    pedal at idle position
    manual transmission 0.34-0.43 VDC
    automatic transmission 0.35-0.45 VDC

    pedal at full throttle
    manual transmission 3.1-3.3 VDC
    automatic transmission 3.7-3.8 VDC

    EML connector pedal position test pin
    M70 DME 1.2 brown/violet pin 1
    M70 DME 1.7 blue/brown pin 20
    M30 DME 1.3 blue/brown pin 20

    terminal numbers are molded in the EML connector face. These numbers are very small and may be difficult to read.

    set a gap of 3mm / 0.118 in. between accelerator pedal bracket and the idle stop.
    To check adjustment, peel back rubber boot from EML harness connector (round big plug left side engine bay close to the diagnosis port) and connect digital voltmeter between specified pin in connector and ground.
    Shogun tricks and tips for the E32 series are HERE!

  17. #42
    Join Date
    Mar 2019
    Location
    Belgium
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    My Cars
    BMW E31 1990
    Hello

    Problem is solved. It was a wrong contact in the cable behind the engine that was going from the asc module to the eml. I want to thank everybody for the input.

  18. #43
    Join Date
    Jun 2019
    Location
    Norway
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    My Cars
    Bmw 850i
    Quote Originally Posted by Sicily View Post
    Hello

    Problem is solved. It was a wrong contact in the cable behind the engine that was going from the asc module to the eml. I want to thank everybody for the input.
    Hey! I experience what I think is the same problem as yours. I intermittenly get EML light an bank 1-6 shutdown. Often a recranks, key on off will fix it. This happens usually when warm after startup. Sometimes at coasting near idle. I also get the acs light on after a little while, but not always. I earlier got a constant no bank 1-6 start, that turned out to be a bad distributor. And also in that process I got a used eml module, since the car was still all weird. New rotors, 12 new spark plugs. New ignition wires both banks. Throttles cleaned and swapped. New coils. New fuel filters. Swapped dme connectors, swapped dme relays, swapped mafs, problem do not switch side. The car can sometimes perform good now, without eml light, so it is a lot better and the main issues are solved. But still got eml light now and then, espesially when warm. Have a diagnose pc, and when I get eml light it displays code 20 i belive it was, dk switch bank 1-6. Not much info on the web on fault codes from the eml unit. Since I also get asc light now, It could be the that something electrical between the modules is gone bad or halfway bad since its not constant. Any thoughts?
    Im also going to do a propper resync of the throttels to rule that out, since batterys have been disconnected. They are new and fully charged btw. I always get eml light on and off after 2-3 seconds when the ignition is turned.

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