The Passlock™ System is designed in order to deter vehicle theft by disabling the fuel injection system unless the following actions occur:

The Passlock™ system is composed of the following components:

The Passlock™ sensor is a stationary sensor located inside the upper right side of the steering column. The Passlock™ sensor is part of the lock module assembly and may not be serviced separately. The Passlock™ sensor contains the following components:

Each one of the Resistor Networks produces a unique voltage to send to the BCM. The Tamper Hall Effect sensor on located on the top. The Security Hall Effect sensor is located on the bottom. The Passlock™ sensor connects to the BCM via a 3 wire harness. The 3 wire harness consists of the following components:

Both Hall Effect sensors monitor the magnet on the lock cylinder. The Tamper Hall Effect sensor turns ON if an intruder attempts to bypass the Passlock™ sensor by placing a large magnet around that area of the steering column. The Passlock™ sensor sends an analog voltage to the BCM via the Passlock™ data circuit. All of the different S/T Passlock™ sensors are under the same part number. You may not replace the Passlock™ sensor and expect the system to operate properly. You must follow specific replacement instructions.

When you turn the ignition switch from the OFF position to the RUN position, the SECURITY telltale will turn ON for 3 seconds and then turn OFF. The SECURITY telltale is located on the instrument panel cluster (IPC). The IPC will also turn the SECURITY telltale ON if the IPC is unable to communicate with the BCM over the Class 2 serial data line. If this condition exists, the BCM will not set a State of Health (SOH) diagnostic trouble code (DTC). The BCM does not need information from the IPC in order to function properly. The SECURITY telltale indicates whether the BCM has determined if the Passlock™ data has passed. If the BCM determines that the Passlock™ data has failed, the BCM sends a Class 2 message to the IPC to turn the SECURITY telltale ON. The SECURITY telltale will be ON STEADY or FLASHING when a Passlock™ DTC is set. The SECURITY telltale may also be FLASHING when the following conditions are present:

The Passlock™ logic is contained within the body control module (BCM). When the ignition lock cylinder is turned to the CRANK position, the BCM monitors the Passlock™ data from the Passlock™ sensor . The Passlock™ sensor sends an analog voltage to the BCM. The BCM determines the validity of the voltage and sends a class 2 serial data password to the powertrain control module (PCM)/vehicle control module (VCM). If the password received by the PCM/VCM is not the same password as the last learned password, the PCM/VCM will not allow the vehicle to start. This condition causes the fuel injectors to turn OFF and the security telltale to turn ON.

The BCM continually inspects the operation of the Passlock™ system during the vehicle's operation. If the Passlock™ system telltale turns ON continuously during the vehicle's operation, refer to the Passlock™ System Check.

The Passlock™ system has a lockout cycle of approximately 10 minutes. Once the vehicle is in the lockout cycle, the vehicle remains in the lockout cycle for 10 minutes, even if the ignition switch is turned from the RUN position to the OFF position.

The Passlock™ system uses the lockout cycle in order to synchronize all of the Passlock™ components when any Passlock™ related part is changed. The Passlock™ system requires 3 consecutive lockout cycles in order to complete the 30 minute learn procedure for a changed component.