Power Liftgate Module
WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.
The power liftgate module is connected to the ISO 9141 communication network. The module controls opening and closing of the vehicle liftgate. The ISO communication network will not function if the wire is shorted to ground or battery voltage. Check the network circuit between the power liftgate module and the DLC C251. Total resistance value must not be more than 5 ohms. If the resistance is more than 5 ohms, there is an open circuit in the ISO network, damage to the DLC C251, damage to the power liftgate module C4174, or a problem in the in-line connector. For additional information on this system, refer to HANDLES, LOCKS, LATCHES AND ENTRY SYSTEMS .