Problem with my 1999 Chevrolet Malibu
Security theft light.
Repair work done prior = Replaced the ignition cylinder because the key
would not turn, and now it wont start.t.
tip/donation yes
GM tech = jk
question = Why does my chevy malibu not start after changing the ignition
switch. My malibu will crank over but not start sometimes. The theft security light
will come the dash. I have seen on other sites that there is a re-learn code
procedure to get it to start. How do i fix this problem. Are there any other parts
involved, or just a code relearn.
JK:
Here is the relearn steps you needed...
Security theft light.
Repair work done prior = Replaced the ignition cylinder because the key
would not turn, and now it wont start.t.
tip/donation yes
GM tech = jk
question = Why does my chevy malibu not start after changing the ignition
switch. My malibu will crank over but not start sometimes. The theft security light
will come the dash. I have seen on other sites that there is a re-learn code
procedure to get it to start. How do i fix this problem. Are there any other parts
involved, or just a code relearn.
JK:
Here is the relearn steps you needed...
Chevy Malibu Passlock Theft Re-Learn Procedure.
Theft / Security Light
The security system on todays cars and trucks prevents the vehicle from being stolen. There are many
variations of the system going back to the early 1990's. Systems have been called Theftlock, passlock, PK3.
This warning could be on when the engine is running, indicating a fault has been detected in the system. If left
un repaired, there is a good possibility that the car will eventually not start.
There are several different possibilities for the cause of the warning, depending on the make / model / year of
the vehicle. Anything from a bad ignition cylinder wire, to a bad cylinder to a dad Body Control Module (BCM).
After market (non-factory) alarm and remote start systems can cause havoc with the factory theft system,
causing this warning light, or a no start.
The security system on todays cars and trucks prevents the vehicle from being stolen. There are many
variations of the system going back to the early 1990's. Systems have been called Theftlock, passlock, PK3.
This warning could be on when the engine is running, indicating a fault has been detected in the system. If left
un repaired, there is a good possibility that the car will eventually not start.
There are several different possibilities for the cause of the warning, depending on the make / model / year of
the vehicle. Anything from a bad ignition cylinder wire, to a bad cylinder to a dad Body Control Module (BCM).
After market (non-factory) alarm and remote start systems can cause havoc with the factory theft system,
causing this warning light, or a no start.
A faulty ignition lock cylinder is the most common cause for security / theft light.
This procedure is a relearn that should get it to start until the part is replaced.
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON, vehicle will not start.
Observe the SECURITY telltale, after approximately 10 minutes the telltale will
turn OFF.
Turn OFF the ignition, and wait 5 seconds.
The vehicle is now ready to relearn the Passlock Sensor Data Code and/or
passwords on the next ignition switch transition from OFF to CRANK.
Start the engine, the vehicle has now learned the Passlock Sensor Data Code
and/or password.
Best to have a battery charger on during this time to avoid a weak battery.
A very weak battery can cause programming failure.
This procedure is a relearn that should get it to start until the part is replaced.
Turn ON the ignition, with the engine OFF.
Attempt to start the engine, then release the key to ON, vehicle will not start.
Observe the SECURITY telltale, after approximately 10 minutes the telltale will
turn OFF.
Turn OFF the ignition, and wait 5 seconds.
The vehicle is now ready to relearn the Passlock Sensor Data Code and/or
passwords on the next ignition switch transition from OFF to CRANK.
Start the engine, the vehicle has now learned the Passlock Sensor Data Code
and/or password.
Best to have a battery charger on during this time to avoid a weak battery.
A very weak battery can cause programming failure.
