Car Alarms: Anti-theft gone wild, s10 blazer, passlock bypass


Question
I have a 2000 s10 Blazer with the factory installed anti-theft system. Recently, the security light has been coming on at random times and will sometimes prevent me from starting my car. I'll have to reset the alarm, wait the 10 minutes and hope the truck will start. Is there a way to disarm the alarm? Its getting very frustrating. The truck had remote start when I purchased it and its been suggested that the its the module for this that is going bad and triggering the alarm sensor. Is there any logic to this? I use my remote start a lot, but would not be opposed to removing it if this will prevent the random lockdowns. Please help!

Answer
Unfortunately you are correct, this
vehicle has a the PASSLOCK II key
based engine disabling system, and currently it
is engaging on it's own.

A bypass is already installed to circumvent
for remote start, and yes, may be malfunctioning.
If left unchecked, it will lock down the fuel injector
rail (as it has now), and will most likely need
to be reset or replaced before you get
any peace out of it.

The Passlock Bypass Module was 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 passlock system.

That is it's designed purpose.
Your's, not so much. Seems to be "frozen" open.

My advice is to get it into a local
remote starter install shop for evaluation
and repair/replacement of the bypass module
as it all seems to be centered here on that
componant.

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 that's where I land on this situation.
Best to have a pro inspect it first before radical
changes are made.

Kind Regards,

Robert Martin-ALARMTEK/CEO
Master Technician
Mobile Security Electronics
www.PASSLOCK2.com