Principles of Operation

WARNING: This page is about a different car, the 2004 Ford Explorer Sport Trac. However, it is still accessible from the selected car via links, so may be relevant.

The vehicle security module is on the international standards organization (ISO) 9141 communication network. To support vehicle security module diagnostics, the diagnostic tool must request all information or initiate module commands.

The vehicle security module controls the power door lock system. The module monitors the door lock/unlock switch inputs from the interior door lock switches. When the module receives an unlock/lock command from any door lock control switch, the module will activate the door lock actuators. The module also controls the following lock/unlock features:

Remote keyless entry (RKE)
Keyless entry

For additional information on the door lock systems, refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS .

The vehicle security module controls the autolamp subsystem. The autolamp subsystem provides light-sensitive automatic on/off control of the headlamps and parking lamps. For additional information, refer to MODULE CONFIGURATION .