Vauxhall Astra F (1991 - 1998) - 1997 , 1.6i , immobiliser

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Wed 5 Mar 2008 16:15
1997 , 1.6i , immobiliser - planetbic
hi,
i have an astra which seems to have forgotten which key will work !
had the key for this car & my other car ( 1994 cav ) on keyring. the chip for the astra had feel out of key when changing battery for key light. i had attempted to use car without the chip in key ( before noticing it was missing ) & have been told that the immobiliser has been confused because there was an incorrect chip present ( in cav key ).
does anyone know how to get the car to recognise its chip as i don't have the original masterkey??
have tried turning ignition on & off 25+ times , disconnecting battery for 15 mins + & locking/unlocking doors with ignition on but to no avail .
cheers, bic.
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Wed 5 Mar 2008 16:30
1997 , 1.6i , immobiliser - Screwloose

Your only hope seems to be to call out a vehicle locksmith to fit a new chip into your key and re-program your immobilizer.
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Wed 5 Mar 2008 18:57
1997 , 1.6i , immobiliser - Dynamic Dave
have been told that the immobiliser has been confused because there was an incorrect chip present ( in cav key ).


Never heard of that one before. I take it you found the correct chip that fell out and refitted? If so, was there any sign of damage - ie, small segment broken off after landing on the floor?
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Wed 5 Mar 2008 19:48
1997 , 1.6i , immobiliser - John S
I think DD is right - I don't think the system will be permanently confused by the 'wrong' chip. There are no master keys for Vauxhalls either. The system needs programming by the dealer with a TECH 2 to accept the chips in the keys and there are no tricks to get round this. To do this they need the 'Car Pass' with the ECU/immobiliser code. The dealer can get this (at a price - c£10) if you don't have it. If the car doesn't recognise what you believe is the 'correct' chip I agree with DD that it's probably damaged - or the wrong one! Some locksmiths can programme new keys so they are clones of the originals, but this isn't an option here as you've either lost or damaged the 'working' chip. Not sure many have access to the TECH 2 to programme a new key to the car.

JS

Edited by John S on 05/03/2008 at 19:50

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