LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lincoln >> 2019 >> Navigator Select, RWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Handles, Locks, Latches And Entry Systems >> Description And Operation >> Handles, Locks, Latches and Entry Systems - System Operation and Component Description >> System Operation >> Operation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

System Operation: Operation

Approach Detection 

The approach detection feature is used to passively activate the illuminated entry feature while approaching the vehicle.

To set the vehicle for approach detection, turn the ignition off, exit the vehicle, make sure the liftgate and all the doors are closed and locked. All valid programmed passive keys need to be outside of the area of detection (more than 10 feet) longer than 60 seconds for the BCM to activate the approach detection feature.

When the approach detection feature is active, the BCM uses the passive entry antennas (located in the door handles and at the rear of the vehicle) to detect a valid programmed passive key when approaching within 2.7 m (8.5 ft) of the vehicle. If the BCM detects a valid programmed passive key, it activates the illuminated entry feature.

The approach detection feature is not active/does not activate when:

The approach detection feature can be enabled/disabled through the message center.

Autolock 

The autolock feature locks all of the doors after all of the following have occurred:

The autolock feature can be enabled/disabled through the IPC message center.

Auto-Unlock 

NOTE: The doors do not auto-unlock if the vehicle has been electronically locked before the driver door is unlocked.

The auto-unlock feature unlocks all of the doors when all of the following conditions have been met:

The auto-unlock feature can be enabled/disabled through the IPC message center.

Door Lock Switch Inhibitor 

The door lock switch inhibitor is a BCM-controlled feature that prevents the interior door lock control switches and liftgate release switch from functioning when the following conditions are met:

If the interior door lock control switches or liftgate release switch are pressed while inhibited, a chime sounds and "Switches Inhibited Security Mode" is displayed on the IPC message center.

The feature is disabled when any door is opened using the interior door handle.

For more information, refer to "Door Lock Switch Inhibitor" in the Owner's Literature.

Fuel Filler Door Lock (If Equipped) 

Upon a command from the BCM, the fuel filler door actuator unlocks the fuel filler door in conjunction with the driver's door latch.

The fuel filler door actuator locks the fuel filler door when the vehicle has been locked using the key (RKE transmitter), mechanical key, or interior door lock control switches.

Keyless Entry Keypad 

The keyless entry keypad is integrated into the front door window molding. The BCM sends voltage signals on 3 separate circuits to the keyless entry keypad. When an individual keyless entry keypad button is touched, an individual or combination of the input circuits is routed to ground. Based on these inputs, the BCM determines which button was touched. When a valid code is received, the BCM locks/unlocks the doors.

When a button is touched, the buttons illuminate and turn off after 5 seconds have elapsed since the last button press. The keyless entry keypad also illuminates any time the illuminated entry feature is active.

The keyless entry keypad can be used for the following:

To provide added security, the Anti-Scan feature disables the keyless entry keypad for 1 minute after 36 button presses without a valid entry code being entered. The keyless entry keypad flashes during this 1 minute mode with all functionality disabled except for 7/8 and 9/0 still being allowed to lock the vehicle. The Anti-Scan feature turns off after 1 minute of keyless entry keypad inactivity, the unlock button is pressed on a RKE transmitter, a passive entry feature is used, or the ignition is turned on.

To lock all doors, touch and hold the 7/8 and 9/0 buttons at the same time for approximately 0.5 second. The locking function is disabled when the driver door is open. It is not necessary to enter the factory set or personal code prior to locking all doors.

To unlock the driver door, enter either the factory set code or a personal code (each digit must be pressed within 5 seconds of the prior digit). The illuminated entry feature activates unless disabled.

To unlock all doors, enter the factory set code or a personal code (driver door unlocks) and then touch the 3/4 button within 5 seconds. This feature can be changed to a 1-stage unlock so that all of the doors unlock when a valid code is entered. Refer to: Staged Unlock Programming .

The factory keycode for the keyless entry keypad can be retrieved from a label on the BCM, using a diagnostic scan tool, or by using 2 programmed keys. To retrieve the factory keycode using 2 programmed keys:

LED Door Lock Indicators 

Each door panel also has a door lock indicator located on the window sill to indicate the lock or unlock status of that individual door. The door lock indicators are controlled by the lock/unlock feedback switch located within each door latch. When powered, they illuminate to indicate a door is locked and are off when a door is unlocked.

The Light Emitting Diodes (LEDs) are powered continuously if the ignition is on, and when the battery saver feature has not activated if the ignition is off.

The DDM and PDM provide voltage to their respective front door lock indicator and the demand lamp voltage supply circuit from the BCM provides voltage to the rear door lock indicators.

The lock/unlock feedback switch provides a ground path to bypass the indicator. The switch is closed when the door is unlocked (indicator not illuminated) and open when locked (indicator illuminated).

Panic Alarm 

The panic alarm feature provides audible and visual alarms which are evident from the exterior of the vehicle. When the panic alarm button is initially pressed, the panic alarm feature requests that the turn signals flash and the horn sounds for up to 3 minutes or until deactivation. The flashing of the outputs occurs simultaneously.

The panic alarm can only be activated when the ignition is off. This feature is disabled at all other times. Deactivation of an active panic alarm is accomplished when:

The panic alarm cannot be deactivated during the first 5 seconds of activation to avoid unintentional deactivation.

Passive Entry 

The passive entry feature unlocks or locks the doors or opens the power liftgate and fuel filler door (if equipped) without having to use a mechanical key blade or the RKE transmitter feature.

With a programmed passive key within 1m (3.28ft) outside a door, touch the lock or unlock sensor on the exterior door handle (the lock/unlock sensors may not detect a hand if thick gloves are worn). The doors lock or unlock depending upon which sensor was touched on the handle. The unlock sensor is located on the inside of the handle and the lock sensor is located on the outside top face of the handle.

With the 2-staged unlock feature enabled, the driver front door passive entry feature unlocks the driver door and fuel filler door (if equipped). With the 2-staged unlock feature disabled, the driver front door passive entry feature unlocks all doors, fuel filler door (if equipped), and liftgate. The passive entry feature always locks all doors, fuel filler door (if equipped), and liftgate when the lock sensor is touched for a half second. The remaining doors' passive entry feature locks or unlocks all doors, fuel filler door (if equipped), and liftgate.

When the BCM detects a lock or unlock sensor is touched on an exterior door handle or the liftgate release button is pressed, it activates the corresponding low frequency antenna in the corresponding exterior door handle and inside the luggage compartment area. The low frequency antenna sends out a signal to the passive key. The low frequency signal activates the passive key and the passive key sends a high frequency signal back to the RTM. The RTM interprets the high frequency signal from the passive key and sends the information to the BCM. If requested action is performed if the BCM detects a programmed passive key.

With a programmed passive key within 1m (3.28ft) of the liftgate, press the release button to release the liftgate.

Power Door Locks 

The BCM controls the door locks by using a series of relays (driver door unlock/passenger doors unlock/all doors lock) integrated within it. When the relays are not energized, ground is provided on both circuits to the lock motors within the latches. When an unlock relay energizes, voltage is provided to one side of the lock motor to unlock the door(s). When the lock relay energizes, the polarity is reversed and the motors lock the doors.

The DDM and PDM send voltage signals to the door lock control switches. When a door lock control switch is pressed, the voltage signal is routed to ground, indicating a request to lock/unlock the doors. When the DDM or the PDM detects a lock or unlock request, a message is sent over the CAN to the BCM to lock or unlock the doors.

In the event of a power door lock failure, the doors can be individually locked through the manual door lock. The manual door lock is located on the rear edge of the door just above the door latch opening. For the doors on the left side of the vehicle, insert a key and turn clockwise to lock. For the doors on the right side of the vehicle, insert a key and turn counterclockwise to lock.

Based on input from the door lock control switches, the keyless entry keypad, the passive entry system and the RKE transmitter, the BCM unlocks the driver door, unlocks all the doors or locks all the doors.

If equipped with factory remote start, there is also feedback provided by the vehicle and the key. For additional information regarding the remote start feedback, refer to the Owner's Literature.

Remote Start 

The factory-installed remote start allows the vehicle to be remotely started from outside the vehicle. There is a 2-way communication between the passive key and the vehicle to provide the remote start status of the vehicle. The passive key contains a green and a red LED to indicate the remote start status.

Remote Start LED Feedback 

LED Status
Flashing green Waiting for status update from vehicle
Flashing red Remote start/stop failed
Solid green Remote start or extension successful
Solid red Remote stop successful (engine off)

To remotely start the vehicle, the hood, the buttons on the passive key must be pressed within 3 seconds of each other. Press the lock button once and then the remote start button twice. The vehicle should remotely start and the LED on the passive key should be lit solid green.

The vehicle does not remote start if any of the following conditions are present:

For additional information regarding the remote start system, refer to the Owner's Literature.

RKE 

The RKE feature is controlled by the BCM. When a button is pressed (IKT or passive key), the TIC and RKE command is received by the RTM. The RTM interprets the information and sends a message to the BCM over a LIN circuit and, when the network is awake over the CAN. If the BCM detects a programmed key, it carries out the command by controlling the door locks or activating the horn or turn signals as required.

The RKE system can be used perform any of the following:

The RKE transmitters for an IKT have a normal operating range of 30m (98.43ft) in an open air, no obstruction environment.

The RKE transmitters for a passive key have a normal operating range of 30m (98.43ft) in an open air, no obstruction environment.

The RKE transmitters and the BCM utilize a rolling code to prevent the code from being captured by a code grabber. The system advances the counter in the RKE transmitter and the BCM every time a RKE transmitter button is pressed.

The message center displays Key Battery Low Replace Soon when the battery in the key needs to be replaced.

With the 2-stage unlock feature enabled, the first request for unlocking the doors unlocks only the driver door and provides a long flash of the turn signals. If another unlock request is received within 3 seconds, all the doors are unlocked. This feature can be disabled so that all the doors unlock on the first press of the unlock button (global unlock). Refer to: Staged Unlock Programming . Vehicles without push-button start come from the factory with the 2-stage unlock feature enabled (2 unlock presses to unlock all doors) and vehicles with push-button start come with the 2-stage unlock feature disabled (single press unlocks all doors).

Smart Unlock 

The smart unlock feature prevents the doors from electronically locking when a passive key is left inside the vehicle. When the doors are locked and then closed, the interior of the vehicle is scanned for a passive key. If a passive key is detected inside the vehicle when the doors are locked and closed, the doors unlock.

To override the smart unlock feature, lock the doors using the driver door lock cylinder, the keyless entry keypad, or another programmed passive key.

scientia non olet · About LEMON Manuals