QuestionI have a 2000 Pontiac Grand Prix, with a factory-installed alarm. (Horn beeps once and lights flash when I press "Lock" twice on remote.) Lately the alarm has been going off randomly; only once was I there, but by the time I got the keys to get in or shut it off, it had stopped, so I don't know if there were any dash lights on/flashing during the alarm... otherwise, there are no "security" or other dash lights on during normal operation. The alarm going off involves horn honking and lights flashing. Apparently it's happened the past three nights as well (that's what the angry note on the car from my neighbors said) in the middle of the night.
I've read my manual and a bunch of your other answers --- I'm going to turn the sensitivity down, I think (per manual instructions). I want to make sure that if I just do that, I'm not just masking another problem with PASS-key or something else that will hit me much worse down the road. Any advice is greatly appreciated... thanks!
AnswerThis vehicle has the GM pass-key III immobilizer
anti-theft system. A bypass is required to circumvent.
If left unchecked, it will lock down the fuel injector
rail, and you will need to tow it in to GM for
evaluation, and resetting.
I suggest the PLJX bypass kit to get around
this issue.
This Passlock Bypass Module is designed to momentarilly
allow the engine to remote start by sending a proper
coded pulse to open the fuel rail passlock injector
cut off circuit.
The output from an alarm/remote starter
would then shut down the pulse, once it has detected
the engine has engaged, and preserve the integrity
of the PASS KEY system.
That is it's designed purpose.
However, in your case, this input wire on the PLJX module,
instead of going to a momentary ground pulse from
an alarm/remote starter,
would go to a constant chassis ground, through
the bypass module, grounding out the PASSLOCK.
The PASS KEY would then always be bypassed as long
as that wire is chassis grounded.
I can not speak about a damaged passlock system,
like if a thief has destroyed it, because I do not
get into this part of GM'S security application.
But as a happy coincidence to installing
after market remote starters, this does work on bypassing
passlock in most all GM vehicles we've run into,
including your year GM vehicle as well.
Also, this is a self learning, resistor sensing
and adjusting module. Once the VATS wires have been tapped,
you would press the program button to learn,
and it does. The car should then allow start
with any hardware store key.
Now that being said, if it's just the noise
generating, headlights flashing GM noise box,
& it's malfunctioning, you can disable it for
good by doing the following:
The FACTORY ALARM DISARM WIRE IS
orange/black (-) located
in the driver kick panel.
Once Located, splice into this wire with
a simular guage wire, and put it to
a solid chassis ground. This terminates
the alarm functions entirely.
However, at this point, this car would be exceedingly
easy to steel, so I suggest you get an aftermarket
alarm system to protect it from here on in.
Have a good day.
ALARMTEK
CARALARMSTORE.com
Robert Martin-ALARMTEK/CEO
Master Technician
Mobile Security Electronics
www.PASSLOCK2.com
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