Power Door Locks

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: The BCM temporarily disables the power door locks for approximately 15 seconds when they are constantly cycled for an extended period of time (more than 10 seconds, for example).

The BCM controls the door locks using field-effect transistors (FETs) (driver door unlock/passenger doors unlock/all doors lock). When the field-effect transistors (FETs) are not energized, ground is provided on both circuits to the lock motors within the latches. When an unlock field-effect transistor (FET) energizes, voltage is provided to one side of the lock motor to unlock the door(s). When the lock field-effect transistors (FETs) energizes, the polarity is reversed and the motors lock the doors.

When a door lock control switch is pressed, the voltage signal is routed to DDM or PDM then a message is sent to the BCM indicating a request to lock or unlock the doors.

In the event of a failure of the power door locks, the doors can be individually locked using the manual door lock. The driver front door can also be manually locked or unlocked using the door lock cylinder.

Based upon input from the door lock control switches and the RKE transmitter, the BCM energizes the appropriate field-effect transistors (FETs) to lock or unlock the doors.

Switch Inhibit Feature

The switch inhibit feature prevents unauthorized access to the vehicle from the door lock control switches. The BCM disables the function of both door lock control switches 20 seconds after the vehicle is electronically locked. If any of these switches are activated while they are inhibited, a chime sounds and a message is displayed in the message center to indicate the switches are inhibited. The BCM enables the function of these switches when the vehicle is electronically unlocked.

This feature can be configured on/off through the message center.

Power Door Locking Feedback

The exterior lamps and horn provide visual and audible feedback when unlocking and locking the doors under certain circumstances. Refer to the following chart:

Action	Status of Door(s)	Status of Hood	Visual/Audible Feedback
Press the lock button on the door lock control switch	Open	Closed	A short flash of the turn signals after all the doors are closed.
Press 7/8 and 9/0 on the keyless entry keypad	Closed	Closed	A short flash of the turn signals.
Press the unlock button on a RKE transmitter	Closed	Closed	A long flash of the turn signals.
Press the lock button on a RKE transmitter	Closed	Closed	A short flash of the turn signals.
Press the lock button on a RKE transmitter	Open	Closed	A short flash of the turn signals after all the doors are closed.
Press the lock button on a RKE transmitter	Closed	Open	A short flash of the turn signals after the hood is closed.
Press the lock button on a RKE transmitter twice within 3 seconds	Closed	Closed	The horn chirps twice and the turn signals flash twice.
Press the lock button on a RKE transmitter twice within 3 seconds	Open	Closed	The horn immediately chirps twice and the turn signals flash twice after all the doors are closed.
Press the lock button on a RKE transmitter twice within 3 seconds	Closed	Open	The horn immediately chirps twice and the turn signals flash twice after the hood is closed.

There is also feedback provided by the vehicle to the key for the remote start feature. For additional information regarding the remote start feedback, refer to the Owner's Literature.