1999 E46 touring - is it possible to reprogram / recode a GM5 unit yourself???

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  1. 1999 E46 touring - is it possible to reprogram / recode a GM5 unit yourself??? 
    #1
    BMW Crazed
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    grommet's Car Details
    Model of Car:
    E46 328i
    Year of Manufacture:
    1999
    Transmission Type:
    manual
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    Hi im not sure if this thread is in the right place but im looking at replacing my GM5 unit with a second hand one iv found at my local scrap yard, i understand you just cant swap the units over as they have to be reprogrammed or recoded, but can you do this yourself, if so how???
     
     

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    #2
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    CompDoc's Car Details
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    colin.ab is the GM5 guru. have a look on his website which has lots of info.
    BMW Central Locking - Fault and repair
     
     

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    #3
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    It's typically best if you can get your cars GM5 repaired that way you don't have to deal with finding a compatible module and getting it reprogrammed.

    In the unlikely event that I am unable to repair a GM5 module I install a compatible used module and recode with SSS Progman. You can do it yourself if you have the equipment. The hardest part for me is getting the cars electrical system to at least 13.0 Voltage. Otherwise Progman won't let you continue.
     
     

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    taffy bhoy's Car Details
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    i believe i have a similer problem , the fob wont unlock the doors, but will lock them, also the lock button by handbrake doesnt work, is there any sure fire way to confirm its a g5 module before i look at getting it repaired?

    if i do send it off to have the relays changed, what can/cant the car do? will it still run, but i have to manually lock the doors, or does the car have to be off the road while the repair is being done?
     
     

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    #5
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    The problem with all E46 models is that they are known to have a problem with the GM5 as well as the door actuators which can confuse the issue. AFAIK when the GMF unlocks the doors it also unlocks the fuel flap and boot, so when unlocking if the boot and fuel flap are open but one or more doors are not, its probably the individual door actuators that are at fault. If the doors are still locked as well as the boot and fuel flap, its probably the GMF.
    I think you can drive the car without the GM5 but it does a lot and obviously the systems it controls won't work. The GM5 is not totally solid state and its usually the relays inside that cause most of the problems. Colin.ab (see my post above for web link) can replace these and post back by return so you are not without the car for long. I've no connection with Colin, its just he has repaired these for some years now.
     
     

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    #6
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    Here is a page that explains what won't work w/o the GM installed. www.bmwgm5.com/GM5_FAQ.htm
    Last edited by scottjoh; 02-02-2012 at 21:06.
     
     

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    CompDoc (30-01-2012)

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    #7
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    Great website Scott. Lots of information and definately worth a look.
     
     

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    #8
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    As Scott has kindly said, it is best to have your module repaired, which avoids the coding issue. But in the event a customer has to replace a module I use NCS Expert to code modules. I find that a lot more powerful than SSS. Additionally I can set/unset options which SSS is unable to do. My favourite is for convertibles. I can set the coding to allow roof open/close via the remote! Cool.
     
     

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    FAL (31-01-2012)

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    #9
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    Ok I Have my gm5 infront of me, and all apart, anyone know which parts are to do with wiper functions. Just looking over it all seems ok generally. Any ideas guys thanks
     
     

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