Ignition Lock Cylinder

The Passlock lock cylinder is a locking cylinder that turns a rotating magnet past a stationary hall effect sensor. The rotating magnet creates a resistance code (R-Code) that the cylinder sends to the instrument cluster. The Passlock lock cylinder interfaces with the instrument cluster through a 3 wire connection. The 3 wires have the following functions:
^ Power
^ Ground
^ Data

Engineers design the Passlock system in order to prevent theft even if the various theft deterrent parts change. The Tamper mode will engage if any of the following components change:
^ The Passlock lock cylinder
^ The instrument cluster
^ The powertrain control module (PCM)

If you replace any of the above components, the system will enter the long tamper mode. If the system enters the long tamper mode, ensure that the system completes a long tamper mode cycle. During the long tamper mode cycle, the THEFT indicator will flash for the full 10 minutes. The instrument cluster and the PCM require the full 10 minutes in order to complete the learn cycle. Ensure that the ignition switch remains in RUN until the indicator stops flashing. If you turn the ignition switch before the indicator stops flashing, repeat the long tamper cycle from the beginning.