Following my previous post below, I have just accessed the wires behind the imobiliser key unit on the dashboard. It consists of three wires one red, one blue and a white wire in the middle.
With the immobiliser dashboard light on, I get a reading of 2.2 volts between the blue and red contacts. After inserting the immobiliser key and turning the dashboard immobiliser light *off* ( but leaving the car ignition turned on) I still get the same 2.2 volts between the blue and red contacts.
I'm a bit nervous about wrecking something, since I don't know what electronic circuitry might be involved somewhere out of sight. Would appreciate any advice on a safe way to proceed in just disconnecting and permanently *by-passing* this troublesome immobiliser. Thanks.
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----- Original Message -----
From: "johngood" Newsgroups: uk.rec.cars.maintenance,uk.rec.cars.misc Sent: Tuesday, February 26, 2008 11:17 AM Subject: unusual immobilizer system problem
My 1994 Corolla 1.3 GLi has an unusual engine immobilizer that is now
> playing up. It has a little rectangular key with three brass strip
> contacts on each side that you insert into a little rectangular key hole
> and then jiggle up and down (not turn it).
>
> When it was giving trouble up a few years ago I squirted some 'contact
> cleaner' into the hole and it then did the trick, but doing the same again
> is now not helping. Sometimes I can sit there jiggling the key up and down
> for ages, before the light goes out and I can start the engine.
>
> I would like to *disconnect* this system, but I'm assuming (being a
> complete novice), that security systems are not designed to be 'easily' > bypassed.
> If I mess up, I guess I could run into serious trouble?
>
> The previous owner said that he didn't think it was factory installed when
> the car was new, but was done subsequently by a Toyota dealer. It has
> stickers on the windows saying this has a Toyota installed security > system.
> But my local Toyota Main Agents here in North West London do not recognize
> this electronic key, neither do locksmiths that sell immobilizer keys. >
> If anyone recognizes this type of key, or can advise on the best course of
> action I would be grateful. Thanks