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  1. Possible to disable immobilizer 
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    Hi,

    I'm having some intermittent problems iwth the immobilizer on my 1996 Audi A4 TDI 110. Is it possible to disable it with VAG.com?

    Thanks
     
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  2. Re: Possible to disable immobilizer 
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    Only if it is an after market, the factory fitted immo can not be disable.Not unless you get one of these car thieves to do it, they seem to be able to do the impossible
     
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  3. Re: Possible to disable immobilizer 
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    I had one of my customers asking this very same question last week. If you could disable the immo at any given time, it wouldn't be much of an immobiliser TBH...

    you're better off addressing the issue rather than trying to simply de-activate it.

    another thing to bear in mind, is the impact this may have on your insurance, many companies consider their insurance void if a vehicle is fitted with an immobiliser which fails to function

     
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  4. Re: Possible to disable immobilizer 
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    If you have immo2, a working key and your 4 digit SKC (immo pin) you may be able to perform an 'emergency start' without vagcom.

    You input the key code through the instruments.

    (your 96 instrument cluster may not support this function)

    http://www.myturbodiesel.com/1000q_h...mo2.htm#recode

    It is only of use on a very limited number of cars, and will get you to a garage if your reader coil breaks.
     
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  5. Re: Possible to disable immobilizer 
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    Thanks for the replies.

    The problem is cold starts. The car starts fine from warm, but cold starts now usually take 2-3 extended attempts to start. This started out as a rare problem but now is more often than not. Bizarrly the car seems to start better in very cold or wet conditions! I get the error below on vag.com which led me to believe it could be the immobiliser. Could this be the cause and what can I do to rectify it? Many Thanks

    John








    Address 01: Engine
    Controller: 028 906 021 CE
    Component: 1.9l R4 EDC 00SG 0803
    Coding: 00002
    Shop #: WSC 06435


    17978 - Engine Start Blocked by Immobilizer
    P1570 - 35-10 - - - Intermittent


    Address 25: Immobilizer
    Controller: 4A0 953 234
    Component: IMMO AUZ9Z0T1679690 D76
    Coding: 00000
    Shop #: WSC 00011
    1 Fault Found:
    01176 - Key
    07-10 - Signal too Low - Intermittent
     
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  6. Re: Possible to disable immobilizer 
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    The immob fault is probably a one off.

    If the starting problem is the immobiliser, the engine will start for 1 or 2 seconds and then stop.

    Your problem could be air in the fuel lines, coolant temp sensor, starter, battery voltage & earth, timing, temp sensor or glow plug fault.

    (Start by checking for air in the fuel lines, weak battery, glow plugs, and coolant & fuel temp sensors)

    First things first, your battery 'must' be ok, and fully charged, as the car will not fuel the cylinders if the cranking rpm's are below a certain threshold.

    Your fuel filter must also be ok (not ancient and blocked)

    If the glow plug light is coming on as normal, the main glow/afterglow heating is probably working ok.

    Disconnect your coolant temp sensor connector, and see if it starts up faster. This will cause the car to slightly raise the cranking rpm's and keep the glowplugs on for longer. If it starts easier there is a problem with the glow plugs/harness/connections or possible slight compression or weak battery/starter problem.

    Also check that the ambient air temp displayed on the dash is more or less correct.

    Worn glow plugs (tips look solid carbon black when removed) or one or more dodgy glowplugs can stop the car starting.

    You can remove the glow plugs from the block in turn, reattach the power, rest them somewhere heat resistant and test, the tips should glow white hot during main glow phase.

    If you are getting smoke (white) on cranking, at least some fuel is getting through.

    If the timing is off, generally slightly retarded, fuel injection is taking place at the wrong time for proper heat/combustion to occur.

    Also loosing pressure from one or more worn piston rings will have the same results, low pressure causing low temps, causing non-combustion.

    Basically, if your car has good cylinder compression, the static injection timing is within range, the glow plugs work ok, and it is recieving good fuel it will fire up.

    Do not discount a worn/binding starter motor or a bad contact/earth.

    Air in the fuel lines will also cause cold starting problems. It is generally from a leaking fuel connection/junction before the pump, and has a big damping effect on the pressure waves from the pump. This can result in pressures at the injectors too low to inject fuel.

    Extended cranking can be needed to pressurise the 'bubbles' sufficiently for injection to take place.

    If you have air in your fuel lines, i would eliminate this problem first. The pump will naturally purge any remaining air once the leak is stopped.

    If you cannot solve the root cause of the problem, and you have an electronically controlled fuel pump (drive-by-wire) you can use vagcom to increase the fueling on startup, and extend the glow plug main glow phase. This will greatly help the car to start (more pressure and heat)

    See these threads for more info:

    (General start & cold start)

    http://forums.tdiclub.com/showthread.php?t=199398

    http://forums.tdiclub.com/showthread.php?t=121675

    Hot start problems (may be useful)

    http://forums.tdiclub.com/showthread.php?p=749854

    http://forums.tdiclub.com/showthread.php?t=123304
     
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  7. Re: Possible to disable immobilizer 
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    Quote Originally Posted by Eshrules-Enterprises View Post
    I had one of my customers asking this very same question last week. If you could disable the immo at any given time, it wouldn't be much of an immobiliser TBH...

    you're better off addressing the issue rather than trying to simply de-activate it.

    another thing to bear in mind, is the impact this may have on your insurance, many companies consider their insurance void if a vehicle is fitted with an immobiliser which fails to function
    it is possible... and takes roughly 1 - 30 mins - only works pre 2001 though
     
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  8. Re: Possible to disable immobilizer 
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    Quote Originally Posted by greeny122229 View Post
    it is possible... and takes roughly 1 - 30 mins - only works pre 2001 though
    Can i know how the immo on av Vento 1997 can be disabled.
     
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  9. Re: Possible to disable immobilizer 
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    Quote Originally Posted by Ashley231 View Post
    Can i know how the immo on av Vento 1997 can be disabled.
    Thanks greeny....
    But how can i disable it....
    please help me.
     
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  10. Re: Possible to disable immobilizer 
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    Quote Originally Posted by greeny122229 View Post
    it is possible... and takes roughly 1 - 30 mins - only works pre 2001 though
    Do you know how to disable it on a 1995 T4 Caravelle? For different reasons the immobiliser has had to be unblocked by VW van centre 3 times in the last 5 years (after different electrical faults). It's now blocked again after the main earth strap to the body broke and stuck on the drive and I just want to get moving.
     
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