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Body Control Module

Content Theft Deterrent (CTD) system is an internal function of Body Control Module (BCM) which utilizes class 2 serial data and various switch input information to perform CTD functions. When BCM detects an unauthorized entry, it activates horns and exterior lamps. BCM has five basic modes (disarmed, standby, delayed, armed, and alarm) for operating CTD system. The different modes are described below.

  1. BCM maintains CTD system in a disarmed mode until following conditions are detected:
    • Ignition switch is in OFF position.
    • Any door is open.
    • Doors locked by either power door lock switch or LOCK button on transmitter.
  2. BCM enters standby mode when above conditions are detected. In standby mode, BCM commands theft LED to flash quickly. If all doors are closed and LOCK button on transmitter is used, BCM enters delayed mode.
  3. When last door is closed, BCM enters delayed mode for 30 seconds. In delayed mode BCM commands theft LED to illuminate On steady.
  4. After 30 seconds, BCM enters armed mode. In armed mode, BCM commands theft LED to flash slowly. Any forced entry activates alarm mode.
  5. When BCM detects a forced entry, BCM enters alarm mode. BCM activates horns and exterior lamps for 30 seconds. This is followed by a three minute time-out with horn no longer active. If no new intrusions are detected after time-out, horn is not active. System must be disarmed or intrusion condition removed after time-out for system to exit alarm mode.
  6. There is an arm simulate mode that occurs when LED will flash continuously after 60 seconds when a last door is closed without an arming request from CTD system.

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