1995 E36 320i - DIY check engine light install problems.

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  1. 1995 E36 320i - DIY check engine light install problems. 
    #1
    Bimmer Fan
    Car Details
    sargavanyi's Car Details
    Model of Car:
    E36 320i TOURING
    Year of Manufacture:
    1995
    Transmission Type:
    automatic
    Car Body Type:
    Touring

    Join Date
    Feb 2013
    Location
    United Kingdom
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    Hi there! I am new to the forum but I have already learned a lot; thanks!
    But now I need some direct help: my '95 E36 320i auto touring can't make better than 20mpg! So while searching different posts somewhere I've found a diy for installing the check engine light into the dash, using the pin 8 from the x20 connector to the x16 connector/pin 16 in the instrument cluster. Theoretically now I should be able to see my fault codes using the stomp-test. The problem, that my check engine light does not come up with ignition, neither I can find it using the test to check the instrument cluster- it comes on when I turn OFF the ignition and stays for about five sec's!!! That's the opposite what I need?!
    If anyone could give me some advice I would be really glad as I can't afford to run the car like this.

    Thanks a lot in advance!
     
     

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    #2
    BMW Guru
    Car Details
    TheEnd's Car Details
    Model of Car:
    540
    Year of Manufacture:
    1998
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
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    It's possible it is different on your ECU, you are likely to have a Siemens MS40 which is different to the one the guide was written for.
    The guide was done for a Bosch ECU and it appears that the Bosch unit works as normal, but just wasn't connected.

    There's a possibility that the Siemens unit didn't come with the same OBD flashing fault light as I don't think it was ever used in the US, which was the market that demanded the CEL.
     
     

  4.  
    #3
    Bimmer Fan
    Car Details
    sargavanyi's Car Details
    Model of Car:
    E36 320i TOURING
    Year of Manufacture:
    1995
    Transmission Type:
    automatic
    Car Body Type:
    Touring

    Join Date
    Feb 2013
    Location
    United Kingdom
    Posts
    3
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    0
    Thanked 1 Time in 1 Post
    Thanks for the quick reply! So it seems that I must visit a garage to sort it... Thanks again, this was incredibly quick answer!
     
     

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    #4
    BMW Guru
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    TheEnd's Car Details
    Model of Car:
    540
    Year of Manufacture:
    1998
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
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    A quick check through the pinouts of that ECU shows that there doesn't seem to be any "Check engine" output pin from it, so I guess that means it would have never been available in the US.
     
     

  7.  
    #5
    Bimmer Fan
    Car Details
    sargavanyi's Car Details
    Model of Car:
    E36 320i TOURING
    Year of Manufacture:
    1995
    Transmission Type:
    automatic
    Car Body Type:
    Touring

    Join Date
    Feb 2013
    Location
    United Kingdom
    Posts
    3
    Thanks
    0
    Thanked 1 Time in 1 Post
    Well, that sorts it. Just to repeat myself: thanks for your help!
     
     

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    TheEnd (24-09-2013)

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