How does the PassLock system work on a GM car?

How does the PassLock system work on a GM car?

So the Passlock system concentrates on detecting the removal of the lock cylinder itself. The Hall effect sensor also incorporates a tamper circuit to detect the removal of the lock cylinder. The sensor can also detect the use of a different magnet. To detect lock cylinder removal, GM incorporates a magnet on the end of the lock cylinder.

How do I Turn Off the PassLock sensor?

•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. The vehicle learns the Passlock Sensor Data Code and/or resistance on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

How does a GM lock cylinder sensor work?

The sensor can also detect the use of a different magnet. To detect lock cylinder removal, GM incorporates a magnet on the end of the lock cylinder. They place a Hall effect sensor in the lock cylinder case. The Hall effect sensor changes its signal in the presence of a magnet.

How does the voltage work on a PassLock sensor?

The voltage value indicates whether the Passlock sensor has been activated by the rotation of the lock cylinder or whether the lock cylinder has been removed, indicating a tamper situation. The BCM checks the voltage and compares it to a programmed and learned value to see if it is valid.

So the Passlock system concentrates on detecting the removal of the lock cylinder itself. The Hall effect sensor also incorporates a tamper circuit to detect the removal of the lock cylinder. The sensor can also detect the use of a different magnet. To detect lock cylinder removal, GM incorporates a magnet on the end of the lock cylinder.

The sensor can also detect the use of a different magnet. To detect lock cylinder removal, GM incorporates a magnet on the end of the lock cylinder. They place a Hall effect sensor in the lock cylinder case. The Hall effect sensor changes its signal in the presence of a magnet.

•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. The vehicle learns the Passlock Sensor Data Code and/or resistance on the next ignition switch transition from OFF to CRANK. You must turn the ignition OFF before attempting to start the vehicle.

The voltage value indicates whether the Passlock sensor has been activated by the rotation of the lock cylinder or whether the lock cylinder has been removed, indicating a tamper situation. The BCM checks the voltage and compares it to a programmed and learned value to see if it is valid.