Welcome to the VW AUDI Forum - VWAF.

Page 1 of 3 123 LastLast
Results 1 to 10 of 29
  1. #1
    Join Date
    Mar 2008
    Posts
    12
    Post Thanks / Like
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Possible to disable immobilizer

    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

  2. #2
    Join Date
    Oct 2007
    Posts
    6,327
    Post Thanks / Like
    Thanks
    11
    Thanked 685 Times in 669 Posts

    Re: Possible to disable immobilizer

    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

  3. #3
    Join Date
    Sep 2006
    Location
    UK
    Posts
    9,022
    Post Thanks / Like
    Thanks
    778
    Thanked 646 Times in 474 Posts

    Re: Possible to disable immobilizer

    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
    VWAF wants your feedback!


    11 Fiesta 1.4 tdci edge - retired 2014
    14 Fiesta 1.6 tdci Titanium Econetic





  4. #4
    Join Date
    Apr 2007
    Location
    Lancashire
    Posts
    1,450
    Post Thanks / Like
    Thanks
    0
    Thanked 40 Times in 35 Posts

    Re: Possible to disable immobilizer

    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.

  5. #5
    Join Date
    Mar 2008
    Posts
    12
    Post Thanks / Like
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Possible to disable immobilizer

    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

  6. #6
    Join Date
    Apr 2007
    Location
    Lancashire
    Posts
    1,450
    Post Thanks / Like
    Thanks
    0
    Thanked 40 Times in 35 Posts

    Re: Possible to disable immobilizer

    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

  7. #7
    Join Date
    Apr 2008
    Posts
    9
    Post Thanks / Like
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Possible to disable immobilizer

    Is it just me, or are the VAG immobilisers absolute rubbish?

    Mine intermittently refuses to start, sometimes for a few hours and then other times start every time on the first turn of the key. If I don't see that blooming flashing car with a key in it one more time that will be too much!

    Maybe it is just 52 plate Seat Ibiza 1.9tdi that have this problem, but having looked around there seems to be a few people complaining of similar issues.

    Cheers,
    Gary.

  8. #8
    Join Date
    Oct 2008
    Location
    Canada
    Posts
    35
    Post Thanks / Like
    Thanks
    0
    Thanked 1 Time in 1 Post

    Re: Possible to disable immobilizer

    Before thinking about the Immobilizer, your scan indicates a low battery issue. Low battery output and high stater current draw will affect the immobilizer. Test the battery, B+ and B- connections. Test the alternator for AC ripple. High AC ripple will also affect the Immobilizer and inter-connected systems. Can the Immobilizer be disabled? Yes it can directly inside the ECM. As for car thieves doing this, so does the dealer, just to solve one problem. I guess that known feature makes them a thief as well. The Eeprom can be adjusted to indicate an Immobilizer OFF status. That is a good test but I would re-enable the status after correct repairs.

  9. #9
    Join Date
    May 2008
    Posts
    2,904
    Post Thanks / Like
    Thanks
    4
    Thanked 342 Times in 316 Posts

    Re: Possible to disable immobilizer


  10. #10
    Join Date
    Apr 2008
    Posts
    9
    Post Thanks / Like
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Re: Possible to disable immobilizer

    I managed to get to the bottom of the problem before I got rid of the car, it was basically a bad connection at the connector that went into the bag of the dials, 1 or more of the multiple wires going into the back of the connector were not making sufficient contact, this was temporarily solved by tugging on the bundle of wires, with a permanent (ish) fix of cable tying the wires just before the conenctor in such a way as if you were pulling down in the bundle of cables as per the temporary fix.

 

 
Page 1 of 3 123 LastLast

Similar Threads

  1. Immobilizer issue?
    By ovidiucos in forum Bora - 1998 - 2005
    Replies: 10
    Last Post: 08-01-2008, 09:40 AM
  2. How To Disable Dim Dip
    By noppygolf in forum Golf MK3 - 1993 - 1999
    Replies: 1
    Last Post: 13-09-2007, 12:43 PM
  3. A4 Immobilizer problem
    By evster in forum Audi A4 - Archive Topics
    Replies: 2
    Last Post: 07-03-2007, 12:51 PM
  4. Immobilizer Help
    By MJB20V in forum Audi A4 - Archive Topics
    Replies: 0
    Last Post: 07-03-2007, 12:01 AM
  5. immobilizer & safety
    By trippin in forum 80 - 90
    Replies: 0
    Last Post: 03-09-2006, 05:31 AM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Back to top






Disclaimer: VW Audi Forum is an "independant enthusiast website", and is in no way related to any of the Worldwide Volkswagen,Audi,Seat,Skoda,Bentley,Bugatti,or Lamborghini group of Companies. For official upto date information on any of there vehicles, please visit the official websites. Any comments made throughout this website, are the views of the respective poster, and in no way represent the views of the VW Audi Forum Administration, or the worldwide Volkswagen & Audi Group of companies.


VW Audi Forum do not vet and are not responsible for any information which is posted in this forum. All content is viewed and used by you at your own risk and we do not warrant the accuracy or reliability of any of the information.


Copyright: Images used on this website by the Administration are "Copyright" of Volkswagen GB, Volkswagen AG (Germany), Audi GB, Audi AG (Germany), Volkswagen Motorsport GB, Volkswagen Motorsport AG (Germany), Audi Motorsport AG (Germany), Volkswagen Racing GB, Bentley, Bugatti, and Lamborghini. No image can be replicated by anyone WITHOUT the relevent Companies written permission.


VW Audi Forum is an AUTHORISED retailer for the Surf City Garage range of car care products


All trademarks and copyrights remain property of their respective owners.

No part of the VW Audi Forum website or forum may be reproduced without written permission from the site administration


PLEASE NOTE - PERSONAL ABUSE, ABUSE AGAINST THIS OR ANY OTHER WEBSITE OR ANY COMPANY WILL NOT BE TOLERATED. OFFENDERS WILL BE MODERATED OR EVEN BANNED.


This website and forum are best viewed at a minimum resolution of 1024 by 768.





Page copy protected against web site content infringement by Copyscape


- VW AUDI Forum - The No1 VW Audi Forum - Volkswagen (VW) - Audi - Seat - Skoda - Bentley - Bugatti - Lamborghini - Porsche - VW Audi Forum -


- www.vwaudiforum.co.uk - www.vwaudiforum.co.uk -