PASSLOCK™ System

When mechanical key turns Passlock™ lock cylinder, a voltage is created by a rotating magnet turning past a stationary Hall Effect sensor. This voltage is sent to BCM. The BCM determines validity of voltage signal within a preset time window, and then sends a coded password to PCM, which then allows fuel injectors to operate normally.

If BCM receives incorrect voltage signal, PCM will enter long tamper mode. During long tamper mode, fuel injectors are shut off for 10 minutes and SECURITY indicator light will flash. Vehicle may crank and temporarily start during tamper mode, but will soon stall due to fuel shut-off. If coded password is not received or is incorrect by the time engine starts, PCM will enter lock-out mode. If a large magnet is placed near Passlock™ sensor or a tamper (wrong key) exists, PCM will enter lock-out mode. Lack of data from Passlock™ sensor to BCM will set DTCs and illuminate SECURITY indicator light.