Alarm System -- Help!
Discussion
Hello Fellow Petrolheads:
In April, I purchased a 450SE. When I looked at the car, I may have overlooked the alarm system. Today, I accidentally set off the alarm, which activated the immobiliser. I hit the key fob deactivation button, and stopped the alarm thinking that that would also disengage the immobiliser as well. WRONG. After pulling the fuse, and then disconnecting the CV plug from the unit, the immobiliser was still engaged. As I poked around the alarm, I found a 'rubber nipple' that, when opened, produced a key switch, which must be the immobiliser deactivation switch but it is a completely different key, which I never received at the time of the sale. In contacting the previous owner, he also never received any key when he bought it from the orignial owner. The alarm has 'DIGITAL' printed on the key fob, as well as the unit itself, and Model MPT 1340, printed on the back of the key fob. The car sold at David Gerald in October 1990, but a sticker on the alarm looks as if it was independently fitted November 1992. I have spent several hours today searching for information on this company, but to no evail. So...
Does anyone know if DIGITAL still exists so I can have a new key cut, OR can I take the unit apart to disengage the immobiliser, OR is there a simplistic way to override the system? Thanks much for your help
Shawn
In April, I purchased a 450SE. When I looked at the car, I may have overlooked the alarm system. Today, I accidentally set off the alarm, which activated the immobiliser. I hit the key fob deactivation button, and stopped the alarm thinking that that would also disengage the immobiliser as well. WRONG. After pulling the fuse, and then disconnecting the CV plug from the unit, the immobiliser was still engaged. As I poked around the alarm, I found a 'rubber nipple' that, when opened, produced a key switch, which must be the immobiliser deactivation switch but it is a completely different key, which I never received at the time of the sale. In contacting the previous owner, he also never received any key when he bought it from the orignial owner. The alarm has 'DIGITAL' printed on the key fob, as well as the unit itself, and Model MPT 1340, printed on the back of the key fob. The car sold at David Gerald in October 1990, but a sticker on the alarm looks as if it was independently fitted November 1992. I have spent several hours today searching for information on this company, but to no evail. So...
Does anyone know if DIGITAL still exists so I can have a new key cut, OR can I take the unit apart to disengage the immobiliser, OR is there a simplistic way to override the system? Thanks much for your help
Shawn
Shawn:
The 'Model MPT1340' won't help you much: MPT1340 was the UK Gov't spec that defines what can and can't be done with radio control systems. You often find 'MPT1340 Exempt' on stuff.... but I digress.
Not come across DIGITAL as such, but in a previous life I was an alarm systems engineer, and my remedy would be to pull the thing apart and either trace the keyswitch wiring and solder relevant links in, or jimmy the lock with a set of home-made picks (my best achievement was to pick the lock of the office safe, which also had an electronic keypad lock on it:-).
If you can find a key that will go into the lock but not turn it, you can dismantle the lock and refit the tumblers to match your key profile.
If you have mounds of patience, you could trace the wiring and identify which are the actual Immobiliser leads, then cut and reconnect them.
Last resort: rip it all out and have a Thatcham 1/2 fitted.
W.
The 'Model MPT1340' won't help you much: MPT1340 was the UK Gov't spec that defines what can and can't be done with radio control systems. You often find 'MPT1340 Exempt' on stuff.... but I digress.
Not come across DIGITAL as such, but in a previous life I was an alarm systems engineer, and my remedy would be to pull the thing apart and either trace the keyswitch wiring and solder relevant links in, or jimmy the lock with a set of home-made picks (my best achievement was to pick the lock of the office safe, which also had an electronic keypad lock on it:-).
If you can find a key that will go into the lock but not turn it, you can dismantle the lock and refit the tumblers to match your key profile.
If you have mounds of patience, you could trace the wiring and identify which are the actual Immobiliser leads, then cut and reconnect them.
Last resort: rip it all out and have a Thatcham 1/2 fitted.
W.
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