Monster MotorsportJMB Retrofits
Results 1 to 5 of 5
  1. #1
    Reverse Gear

    Status
    Offline
    Join Date
    Oct 2012
    Posts
    1

    A4 immobiliser problem

    Been having problems with my immobiliser,


    battery died a few months ago and as it was dying the immobiliser would kick in after 2 seconds of starting which I put down to the weak battery,


    put a new battery on but had the same problem since, meaning to start the car I have to disconnect the battery for 20 seconds and as soon as I switch it off I have to do the same thing again to restart it,


    Its been to the garage twice and put on vag com and 50/504a and on vag com it says the key signal is too weak, the instrument panel is clear of faults, and on the 50/50 software says the ecu is in static mode and won't talk to the immobiliser!!!!


    anyone any ideas?




    i have tried a more powerful battery but that still has the problem so I know it's not a battery fault and my key has no battery in it

  2. # ADS
    ADS
    Join Date
    Always
    Posts
    Many
     
  3. #2
    "Stick a V8 in it!"

    Status
    Offline
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    15,372
    I think the battery is a red herring.

    The normal immo activation is to shut the engine down after a second or two, so what you describe there isnt anything battery related.

    Have you tried another key?

    Might need a new reader coil, or sometimes the wiring to the coil causes issues.

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


  4. #3
    bez101's Avatar
    Yorkshire & Humber Rep.

    Status
    Offline
    Join Date
    Jul 2008
    Posts
    8,491
    as above iv sorted quite a few B5's with immob problems
    changed the wire from reader and all was good
    easy ish job to do and parts not a lot of £££.

  5. #4
    jcb
    6th Gear

    Status
    Offline
    Join Date
    Sep 2005
    Location
    uk
    Posts
    4,077
    where is the reader and how do you remove/replace/repair the wiring?

  6. #5
    "Stick a V8 in it!"

    Status
    Offline
    Join Date
    Jan 2008
    Location
    Glenrothes, Fife, Scotland
    Posts
    15,372
    Its part of the ignition barrel.

    Not sure if you can swap the reader on its own, or if you need to buy a whole new barrel though.

    The wiring on earlier cars can prove problematic though!

    2000 A4 1.8T Sport Quattro Avant, Berry Pearl
    2000 A4 1.8T Sport Quattro Saloon, Black-ish
    1997 S4 - PPC £999 Challenge Track Car Build
    TD5 Land Rover Defender build


 

 

Similar Threads

  1. Help! Immobiliser Problem - Car Won't Start
    By coajt in forum A3/S3 Forum (8L Chassis)
    Replies: 8
    Last Post: 25th February 2007, 18:06
  2. Immobiliser Problem
    By HNH5 in forum A6/S6/Allroad forum (C5 Chassis)
    Replies: 2
    Last Post: 22nd June 2006, 19:33
  3. immobiliser problems
    By nugnah1 in forum A4/S4 forum(B5 Chassis)
    Replies: 4
    Last Post: 19th February 2006, 21:20
  4. Immobiliser problems
    By paula1806 in forum A4/S4 forum(B5 Chassis)
    Replies: 9
    Last Post: 12th October 2005, 08:57
  5. I've fixed my immobiliser problem on my '95 A4
    By ajmackie in forum A4/S4 forum(B5 Chassis)
    Replies: 1
    Last Post: 17th April 2004, 17:59

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Single Sign On provided by vBSSO

Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

Content Relevant URLs by vBSEO