pete23 0 Posted May 4, 2010 Report Share Posted May 4, 2010 Replaced my battery this weekend after my old one was flat as a pancake and would no longer hold charge. All connected up the car started fine and all seemed well until I turned the engine off after a short run down my local road. Since then I cannot seem to disarm the immobilser with the key fob and as such cannot start it again!!! The fob battery was relaced a few months back and the small led light lights when the button is pressed so I cannot see this being the source of the problem.Is it possible that the car has lost some codes due to having a flat battery for some time and simply needs reconfiguring? Not sure if its linked but I can also say that over the past year the distance that the fob used to work from has reduced to the point that you had to be stood next to the drivers window to unlock and disarm the thing. Can this be linked? The car has delocked handles drivers and passenger side by the wayCan anyone help me solve this frustrating problem. Has it happened to anyone else???Are there any fixes...Many ThanksPete Link to post Share on other sites
pete23 0 Posted May 6, 2010 Author Report Share Posted May 6, 2010 any ideas peeps? I'm really stuck and need the VR back Link to post Share on other sites
CALICO 130 Posted May 6, 2010 Report Share Posted May 6, 2010 have you tried holding the fob button down for 20 seconds within range it sometimes works Link to post Share on other sites
pete23 0 Posted May 7, 2010 Author Report Share Posted May 7, 2010 Bit of an update... Reconnected my battery lastnight with the key already in the ignition in the 'on' position' and was able to fire the old girl up. (The immobilizer light next to the ash tray was off for the 1st time). However when I turned the ignition off I was unable to prevent the cars alarm from sounding and arming itself again. It seems to me as though the key fob just isnt synced with the car anymore. I have two remotes and have tried the 20 second hold down thing mentioned above but cant get it work. The led on the fob simply lights up immediately but then goes out and doesnt flash like i think its supposed to. Am i correct in thinking the immobiliser has its own power source and if the cars had a flat battery for some time this may have also lost its charge? Anyone have any other suggestions. Please help Link to post Share on other sites
CALICO 130 Posted May 7, 2010 Report Share Posted May 7, 2010 have you a picture of the fob what make is it Link to post Share on other sites
pete23 0 Posted May 7, 2010 Author Report Share Posted May 7, 2010 I can post one up over the weekend if needed. But basically its the black rectangular chaped one with two sqaure buttons at the top (one to arm / disarm and the other acts as a panic button). There is an re LED in the top left and a slider on the right. I am fairly sure this is the factory fit alarm / immobiliser and I have a 97 VR6 so ODB2 i think. I would hazzerd a gues at the scorpion 918 from reading other posts. Maybe someone can confirm this??? Link to post Share on other sites
xyber 1 Posted May 7, 2010 Report Share Posted May 7, 2010 Generally alarms have a battery backup, which on yours wouldve discharged over the time the battery was dead. I'm wondering if the old battery backup has failed due to being flat for so long and now won't take a charge. The alarm/ immob may see this as an attempt to bypass it and just locks down? The other possibility is that the alarm has lost it's coding through being flat, so doesn't take notice of the remote. Think it may be a job for a proper alarm installer, maybe even a new alarm.Has the sounder got any on/ off switches or a reset button on it? May be worth flipping themMine had a VW Conlog alarm which you could plug the remote into a socket in the glovebox to reset it Link to post Share on other sites
pete23 0 Posted May 31, 2010 Author Report Share Posted May 31, 2010 Still stuck with this one guys. Anyone have any other ideas or inspiration??? Xyber, can you expand on the socket reset please - ie: location, leads needed, how this is done etc. Thanks again. Link to post Share on other sites
CALICO 130 Posted May 31, 2010 Report Share Posted May 31, 2010 i would try an auto locksmith my local one removed my dodgy immobiliser on my mk1 when it filled full of water and locked out Link to post Share on other sites
pete23 0 Posted June 1, 2010 Author Report Share Posted June 1, 2010 Small update:Was able to start the VR once. +''ve terminal disconnected and reconnected with the key in and ignition on. The console led was not lit so instead of turning the ignition off and trying to reset using the fob I turned the key and the engine fired up. Ran and drove fine but once turned off I was again unable to disarm the alarm / immobiliser using the fob again. LED back to solid red again!!! Very frustrating to say the least.Tried this procedure again but all I get now is a strong engine turnover with no fire up (presumabley a fuel / spark block). Reading other forums I've have seen some people refer to the crank position sensor and/or the Hall Effect generator. May this be a side issue?The problem still remains though... the fob will not disarm the immobiliser!!!! Link to post Share on other sites
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