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Home >> Ford >> 2015 >> Explorer Limited, 3.5L Eng VIN 8, AWD >> Repair and Diagnosis >> Accessories & Equipment >> Anti-Theft Systems >> Door Handles, Door Locks, Door Latches And Entry Systems - Without Intelligent Access (IA) >> Description And Operation >> Handles, Locks, Latches and Entry Systems - Without Intelligent Access (IA) >> Notes

Handles, Locks, Latches and Entry Systems - Without Intelligent Access (IA): Notes

Overview 

The power lock/unlock feature locks or unlocks the doors upon a customer request from either door lock control switch in the vehicle, RKE transmitter, or keyless entry keypad. The power door locking system functions independently of ignition status or vehicle speed.

System Operation 

System Diagram 

GFD37673Courtesy of FORD MOTOR COMPANY

Network Message Chart BCM Network Message Chart 

Broadcast Message Originating Module Message Purpose
RKE data TPM module Provide the BCM with the RKE TIC and the button press.
Vehicle speed PCM Provide the BCM with the vehicle speed. The vehicle speed data is used for Autolock and Auto-Unlock.

Power Door Locks 

NOTE: The door lock and the unlock relays are internal to the BCM and are non-serviceable.

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.

Liftgate Latch Release 

The BCM sends a voltage signal to the liftgate release switch. When the liftgate release switch is pressed, the voltage signal is routed to ground, indicating a request to release the liftgate latch. The BCM momentarily provides voltage to the liftgate latch to actuate the release motor.

For vehicles not equipped with the police package, the BCM releases the liftgate only when the doors are unlocked electronically or when requested from the RKE system.

For vehicles equipped with the police package, the BCM releases the liftgate only when the ignition is in the RUN mode and the doors are unlocked electronically or when requested from the RKE system. The liftgate latch can also be released using a lock cylinder.

Keyless Entry Keypad 

The keyless entry keypad carries out the following functions:

The keypad feature operates independently of key position status, vehicle speed, or transmission position. When a keypad button is touched, the keypad buttons illuminate to provide better visibility. The keypad is also illuminated any time that the courtesy lighting is on. If the lock all doors command is entered or 5 seconds have elapsed since the last button press, the illumination is turned off.

Each vehicle equipped with a keypad is programmed with a 5-digit entry code. This code is provided to the customer through a wallet card in the Owner's Literature. In addition, this code is available through a scan tool and is also printed on the BCM label. When entering codes each digit must be entered within 5 seconds of the previous button press.

Locking the Doors with the Keyless Entry Keypad System 

It is not necessary to enter the factory set or personal code prior to locking all doors. To lock all doors, touch and hold the 7/8 and 9/0 buttons at the same time for approximately 2 seconds.

Unlocking the Doors with the Keyless Entry Keypad System 

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 interior lamps illuminate.

To unlock all doors, enter either the factory set code or a personal code (driver door unlocks) and press the 3/4 button within 5 seconds. This feature can be changed to a 1-step unlock so that all of the doors unlock on receipt of the factory set or personal code. Refer to Stepped Unlock Programming  for programming information.

Anti-Scan Feature 

To provide added security, the keypad is disabled for 1 minute after 35 button presses without a valid entry code being entered. The 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.

Anti-scan is turned off after 1 minute of keypad inactivity, the unlock button is pressed on an RKE transmitter, or the ignition is switched to the RUN position.

Factory Keycode Retrieval 

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:

The factory keycode displays momentarily in the message center.

Remote Keyless Entry (RKE) 

The RKE system uses an IKT. The IKT incorporates both the PATS and the RKE transmitter functions in a single device. For additional information on the IKT, refer to Handles, Locks, Latches and Entry Systems - Without Intelligent Access (IA) , IKT.

In addition to the IKTs, 4 conventional keyfobs can also be programmed to the vehicle if requested by the customer. For information on programming the conventional keyfobs, Refer to Remote Keyless Entry (RKE) Transmitter Programming .

The RKE transmitters initiate the following electronic system functions:

The RKE transmitters have a normal operating range of 20 m (65.62 ft).

RKE Lock/Unlock Control - Unlock 

The RKE feature provides lock/unlock functions independently of key position, vehicle speed, or transmission position. The RKE feature provides a stepped (if enabled) process for unlocking the doors. Upon receipt of the first request for unlocking the doors, the RKE control feature unlocks the driver door only and provides a long flash of the turn signals. If another unlock request is received within 3 seconds of the first, the RKE feature unlocks all the doors. This feature can be disabled so that all the doors unlock on the first press of the unlock button. Refer to Stepped Unlock Programming  for programming information.

RKE Lock/Unlock Control - Lock 

The panic alarm feature provides audible and visual alarms which are evident from the exterior of the vehicle. The panic alarm feature requests that the turn signals flash and the horn sounds until deactivation. The flashing of the outputs occurs simultaneously. Activation of the panic alarm is accomplished by pressing the panic button on a RKE transmitter whenever the key is in the OFF position. At all other times this feature is disabled. Deactivation of an active panic alarm is accomplished by any of the following actions:

The RKE feature requests that all of the doors be locked when the lock button is pressed. On any press of the lock button with all doors closed, the doors lock and the turn signals flash one time. If any door or liftgate is ajar, no flash occurs. As soon as the last door or liftgate is closed, the turn signals flash. If 2 presses of the lock button are received within 3 seconds, the horn chirps once and the turn signals flash twice to indicate that all of the doors and liftgate are closed and locked. If any door is ajar when the second lock request is received within 3 seconds of the first, the RKE transmitter feature chirps the horn twice without flashing the turn signals to indicate it locked all of the doors but 1 or more doors or the liftgate is ajar. When the ignition is in the RUN or START position, the turn signal flashes and horn chirp confirmations do not occur.

Panic Alarm 

The panic alarm feature provides audible and visual alarms which are evident from the exterior of the vehicle. The panic alarm feature requests that the turn signals flash and the horn sounds until deactivation. The flashing of the outputs occurs simultaneously. Activation of the panic alarm is accomplished by pressing the panic button on a RKE transmitter whenever the key is in the OFF position. At all other times this feature is disabled. Deactivation of an active panic alarm is accomplished by any of the following actions:

RKE Power Liftgate 

The RKE feature provides a power liftgate open/close function independently of key position. The power liftgate button must be pressed twice within 3 seconds for the power liftgate to open or close.

Remote Start (If Equipped) 

The factory installed remote start (if equipped), is controlled by a RKE transmitter and allows the engine to be started from outside the vehicle. REFER to Starting System , Remote Start for information on the remote start feature.

Autolock 

The autolock feature locks all of the doors when:

The autolock feature repeats when:

The autolock feature can be enabled/disabled. Refer to Autolock Programming  for programming information.

Auto-Unlock 

NOTE: The doors will not auto-unlock if the vehicle has been electronically locked before the driver door is opened while the ignition is in the OFF or ACC position.

The auto-unlock feature unlocks all of the doors when:

The auto-unlock feature can be enabled/disabled. Refer to Auto-Unlock Programming  for programming information.

Smart Unlock 

The smart unlock feature prevents the doors from electronically locking with the key in the ignition lock cylinder. When the BCM receives a lock command from a door lock control switch, and the key is in the ignition lock cylinder with one of the front doors open, the BCM commands the doors to unlock. To override the smart unlock feature and intentionally lock the doors with the key in the ignition, close all doors and lock the vehicle using the keyless entry keypad or pressing the lock button on an IKT, or lock the doors manually with the lock rod before closing the door.

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