501-14 Handles, Locks, Latches and Entry Systems	2014 Fiesta
Description and Operation	Procedure revision date: 05/15/2013

Handles, Locks, Latches and Entry Systems - System Operation and Component Description

System Operation

System Diagram

Network Message Chart

BCM Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Keyless vehicle key recognition	RFA module	Provides the BCM with the RKE commands on vehicles equipped with passive entry.

RFA Module Network Input Messages

Broadcast Message	Originating Module	Message Purpose
Central lock status	BCM	Provides the RFA module with the lock/unlock status of the vehicle.

Transport or Factory Mode

The vehicle is placed in a transport or factory mode at the end of production to reduce the drain on the battery. Various systems may be altered in how they operate or are disabled when in the transport or factory mode. Verify the vehicle has exited this mode before attempting to diagnose a power door lock, liftgate/luggage compartment lid release, passive entry (if equipped) or a RKE transmitter concern. For additional information,
Refer to: Instrument Panel Cluster (IPC) - System Operation and Component Description (413-01 Instrumentation, Message Center and Warning Chimes, Description and Operation).

Power Door Locks

The BCM sends a voltage signal to the door lock control switch. When the door lock control button is pressed, the voltage signal is routed to ground, indicating to the BCM an unlock/lock command from the door lock control switch. The BCM energizes the relay(s) (internal to the BCM ) to supply power and ground for the door lock actuators. There are 3 relays to control the locking and unlocking of the doors. A driver door unlock relay is energized to unlock the driver door, a passenger door unlock relay is energized to unlock the 3 passenger doors, and an all lock relay is energized to lock all 4 doors.

The BCM monitors each door for lock/unlock status. If the BCM detects any door is unlocked when the door lock control button is pressed, the doors lock. If the BCM detects all the doors are locked when the door lock control button is pressed, the doors unlock.

The doors can also be centrally locked or unlocked using a key in the driver door lock cylinder. When a key is used in the driver door lock cylinder to lock or unlock the driver door, the BCM detects the lock/unlock feedback input change state and correspondingly locks or unlocks all the other doors.

In the event of a failure of the power door locks, 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 driver side of the vehicle, insert a key and turn the key clockwise to lock. For the doors on the passenger side of the vehicle, insert a key and turn the key counterclockwise to lock.

Door Lock Indicator

For a visual indication of the door lock status, the BCM controls the door lock indicator located near on the door lock control switch. If all four doors are locked, the indicator illuminates. If any door is unlocked, the indicator is off.

The BCM monitors the door lock/unlock status by sending a voltage signal to the lock/unlock feedback switch inside each of the 4 door latches. The switches are closed when the door is unlocked and open when locked. The BCM uses the input from the lock/unlock feedback switches to control the door lock indicator.

Switch Inhibit Feature

The switch inhibit feature prevents unauthorized access to the vehicle from the door lock control switch when the ignition is off. The BCM disables the function of the door lock control switch 30 seconds after the vehicle is electronically locked. The BCM enables the function of these switches when the vehicle is electronically unlocked.

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 table.

Action	Status of Door(s)	Status of Liftgate/Luggage Compartment Lid	Status of Hood	Visual/Audible Feedback
Press the unlock button on a RKE transmitter	Closed	Closed	Closed	A long flash of the turn signals.
Press the lock button on a RKE transmitter	Closed	Closed	Closed	Two short flashes of the turn signals.
Press the lock button on a RKE transmitter	Open	Closed	Closed	Two short flashes of the turn signals after all the doors are closed.
Press the lock button on a RKE transmitter	Closed	Open	Closed	Two short flashes of the turn signals after the liftgate/luggage compartment lid is closed.
Press the lock button on a RKE transmitter	Closed	Closed	Open	Two short flashes of the turn signals after the hood is closed.
Press the lock button on a RKE transmitter twice within 3 seconds	Closed	Closed	Closed	The horn chirps once and the turn signals flash twice.
Press the lock button on a RKE transmitter twice within 3 seconds	Open	Closed	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	Closed	The horn immediately chirps twice and the turn signals flash twice after the liftgate/luggage compartment lid is closed.
Press the lock button on a RKE transmitter twice within 3 seconds	Closed	Closed	Open	The horn immediately chirps twice and the turn signals flash twice after the hood is closed.

Liftgate/Luggage Compartment Lid Release

The liftgate/luggage compartment lid release system is inhibited if the vehicle speed exceeds 8 km/h (5 mph). The liftgate/luggage compartment lid release system is also inhibited from the release switch when any vehicle door is locked.

If the liftgate/luggage compartment lid release switch on a RKE transmitter is pressed one time, the liftgate/luggage compartment lid releases if the release switch located on the liftgate/luggage compartment lid is pressed within 45 seconds. The button on a RKE transmitter must be pressed twice within 3 seconds for the liftgate/luggage compartment lid latch to release.

The BCM sends a voltage signal to the liftgate/luggage compartment lid release switch. When the liftgate/luggage compartment lid release switch is pressed, the signal is routed to ground, pulling the signal low and indicating a request to release the liftgate/luggage compartment lid latch

When the BCM receives a valid request to release the liftgate/luggage compartment lid, the BCM supplies voltage to the latch. The liftgate/luggage compartment lid latch then actuates to release the liftgate/luggage compartment lid.

RKE (without push-button start)

The Integrated Keyhead Transmitter (IKT) key incorporates both the PATS and the RKE transmitter functions in a single device.

The RKE transmitters can be used to:

unlock the driver door.
unlock all doors.
lock all doors.
release the liftgate/luggage compartment lid latch (liftgate/luggage compartment lid button must be pressed twice within 3 seconds).
arm/disarm the perimeter alarm (if equipped).
configure the staged unlock programming (2-stage unlock or global unlock).

The RKE transmitters have a normal operating range of 20 m (66 ft).

The RKE feature is controlled by the BCM . When a button is pressed on a RKE transmitter, the Transmitter Identification Code (TIC) and the RKE command are received by the internal BCM antenna. If the BCM detects a valid programmed RKE transmitter, the BCM carries out the command by activating the power door locks, releasing the liftgate/luggage compartment lid latch or activating the horn or turn signals as required.

The RKE feature operates only when the ignition is off. Additionally, if the vehicle has been inactive for 28 days or longer, the BCM switches off RKE feature to conserve battery power. The RKE feature is enabled again when the ignition is switched ON.

RKE Transmitter Unlock

The RKE feature provides a staged process for unlocking the doors. Upon receipt of the first request for unlocking the doors, the RKE control feature unlocks only the driver door. If another unlock request is received within 3 seconds of the first, 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). To enable/disable this feature,
Refer to: Staged Unlock Programming (501-14 Handles, Locks, Latches and Entry Systems, General Procedures).

RKE Transmitter Lock

The RKE feature requests all of the doors lock when the lock button is pressed.

RKE Transmitter Liftgate/Luggage Compartment Lid Latch Release

The RKE transmitter provides a liftgate/luggage compartment lid release function. The liftgate/luggage compartment lid release button must be pressed twice within 3 seconds for the liftgate/luggage compartment lid latch to release.

RKE (with push-button start)

The passive key incorporates both the PATS and the RKE transmitter functions in a single device.

The RKE transmitters can be used to:

unlock the driver door.
unlock all doors.
lock all doors.
release the liftgate/luggage compartment lid latch (liftgate/luggage compartment lid button must be pressed twice within 3 seconds).
arm/disarm the perimeter alarm (if equipped).
configure the staged unlock programming (2-stage unlock or global unlock).

The RKE transmitters have a normal operating range of 20 m (66 ft).

The passive key sends a signal to the Radio Frequency (RF) receiver when any RKE button is pressed. The Radio Frequency (RF) receiver interprets the information from the passive key and sends a signal to the RFA module. If the RFA module determines it is a programmed key, it sends a message over the MS-CAN to the BCM .

The RKE transmitters and the RFA module also 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 RFA module every time a RKE transmitter button is pressed.

The RKE feature switches off after 27 days of inactivity to conserve battery power. The RKE feature enables when the ignition is switched ON.

RKE Transmitter Unlock

RKE Transmitter Lock

The RKE feature requests all of the doors lock when the lock button is pressed.

RKE Transmitter Liftgate/Luggage Compartment Lid Latch Release

Autolock

The autolock feature (when enabled) locks all of the doors after all of the following have occurred:

All the doors are closed.
The ignition is on.
The vehicle is shifted into any gear to put the vehicle in motion.
The vehicle attains a speed greater than 7 km/h (5 mph).

The autolock feature repeats when any door is opened then closed when the ignition is ON and the vehicle reaches a speed greater than 7 km/h (5 mph).

Refer to the Owner Guide for autolock programming.

Auto-Unlock

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

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

The ignition was on.
All the doors are closed and locked.
The vehicle was shifted out of park and a speed greater than 20 km/h (12 mph) was achieved.
The vehicle has come to a stop.
The ignition transitions to ACC or OFF and, within 10 minutes, the driver door is opened.

Refer to the Owner Guide for autolock programming.

Smart Unlock (without push button start)

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 the door lock control switch and the key is detected in the ignition lock cylinder with one of the front doors open, the doors lock and then unlock.

To override the smart unlock feature and intentionally lock the doors with the key in the ignition lock cylinder, close all doors and lock the vehicle with another key using the driver door lock cylinder.

Smart Unlock (with push button start)

Passenger Compartment

The smart unlock feature prevents the doors from electronically locking when a passive key is left inside the passenger compartment of 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.

The vehicle can still be locked with a passive key inside the vehicle by locking the doors with another key using the driver door lock cylinder or the lock button pressed on another passive key.

Luggage Compartment

The luggage compartment smart unlock feature prevents the liftgate/luggage compartment lid from latching when a passive key is detected inside the luggage compartment area. When the liftgate/luggage compartment lid is closed when the doors are locked, the luggage compartment is searched for a passive key. If a passive key is detected inside the luggage compartment, the liftgate/luggage compartment lid releases.

A passive key can still be locked inside the luggage compartment area by closing the liftgate/luggage compartment lid when the doors are unlocked and then locking the doors after the liftgate/luggage compartment lid is closed with the key inside. Or if a second passive key is in range of the keyless entry rear antenna when the liftgate/luggage compartment lid is closed.

Passive Entry

The passive entry feature unlocks or locks the doors or opens the releases the liftgate/luggage compartment lid latch without having to use a mechanical key blade or the RKE transmitter feature.

When the RFA module detects the lock/unlock button is touched on an exterior door handle, or the liftgate/luggage compartment lid release button is pressed, it activates the low frequency antenna in the corresponding exterior door handle or the keyless entry rear antenna. 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 Radio Frequency (RF) Receiver. The Radio Frequency (RF) Receiver interprets the high frequency signal from the passive key and sends the information to the RFA module. If the RFA module detects a programmed passive key, it sends a message to the BCM to either unlock the driver door, unlock or lock all 4 doors, or release the liftgate/luggage compartment lid latch.

Door Passive Entry

With a programmed passive key within 1 m (3 ft) outside a door, press the lock/unlock button on the exterior door handle. The doors lock or unlock depending upon their current state (locked/unlocked).

The driver front door passive entry feature either unlocks the driver door (if 2-staged unlock is enabled) or all four doors (if 2-staged unlock is disabled). The passive entry feature always locks all four doors when the button is pressed to lock the doors.

The passenger front door passive entry feature always locks or unlocks all four doors.

Liftgate/Luggage Compartment Passive Entry

With a programmed passive key within 1 m (3 ft) outside the liftgate/luggage compartment lid, press the liftgate/luggage compartment lid release button on the rear of the vehicle to release the liftgate/luggage compartment lid.

Component Description

Door Lock Control Switch/Door Lock Indicator

The door lock control switch is a single pole switch that is integrated into the FCIM and not serviced separately. The BCM supplies the voltage signal to the door lock control switch. When the switch is pressed to lock or unlock the doors, the voltage signal is routed to ground, indicating a request to lock or unlock the doors.

The door lock indicator is also integrated into the FCIM . The BCM provides voltage to door lock indicator to illuminate when the doors are locked.

Door Latches

The door latches are sealed units and contain the door lock actuator, lock/unlock feedback switch, and the door ajar switch. The door lock actuators operate in 2 directions, depending on the polarity of the voltage. The door latches can be lubricated, if needed.

Liftgate/Luggage Compartment Lid Release Switch

The liftgate/luggage compartment lid release switch is a momentary contact switch that supplies a ground signal to the RFA module (if equipped) and to the BCM . When the liftgate/luggage compartment lid release switch is pressed the signal is routed to ground, indicating a request to release the liftgate/luggage compartment lid latch.

Liftgate/Luggage Compartment Lid Latch

The liftgate/luggage compartment lid latch contains the latch release motor and the liftgate/luggage compartment lid ajar switch. The liftgate/luggage compartment lid latch release motor is momentarily supplied voltage by the BCM when a valid request to open the liftgate/luggage compartment lid is detected.

Integrated Keyhead Transmitter (IKT)

The Integrated Keyhead Transmitter (IKT) incorporates both the PATS functions and the RKE transmitter functions in a single device.

During key programming procedures, only the PATS portion of the key is programmed to the IPC . The RKE transmitter is programmed separately into the BCM . A maximum of 8 keys can be programmed.

Passive Key

The passive key incorporates both the PATS functions and the RKE transmitter functions in a single device.

During key programming procedures, the PATS and RKE transmitter Identification (ID) of a passive key are both programmed. A maximum of 8 passive keys can be programmed.

In the event the passive key battery fails:

a key blade within the passive key can be used to unlock the door manually.
the passive key must be placed in the backup slot to start the vehicle.

Exterior Door Handles

The exterior door handles contain a keyless entry antenna a lock/unlock switch. The antennas and lock/unlock switch are wired to the RFA module. When activated, the antenna transmits a low frequency signal to activate a passive key.

The rear door handles not equipped with an antenna or lock/unlock switch.

Keyless Entry Rear Antenna

The keyless entry rear antenna is wired to the RFA module. When activated, it transmits a low frequency signal to activate a passive key.

Radio Frequency (RF) Receiver

The Radio Frequency (RF) Receiver communicates all RKE and passive key information to the RFA module over a LIN -based circuit. The Radio Frequency (RF) Receiver is a receiving antenna that receives the high frequency signals from the passive keys.

BCM

The BCM is the master module in control of the power door lock system. It is responsible for locking/unlocking the doors and releasing the liftgate/luggage compartment lid.

The BCM receives input from the door lock control switch, the liftgate/luggage compartment lid release switch, the RKE transmitters and messages over the CAN for operating the features associated with the power door locks and the liftgate/luggage compartment lid release.

For vehicles with push-button start, the BCM receives input from the RFA module for the RKE transmitter data over the MS-CAN for operating the features associated with the power door locks and the liftgate/luggage compartment lid release.

The BCM requires PMI when replaced.

RFA Module

The RFA module is responsible for obtaining the passive key data and keyless entry lock/unlock requests. It uses the passive entry antennas and the Radio Frequency (RF) receiver to receive the passive key data. The RFA module receives input from the Radio Frequency (RF) receiver, the passive entry antennas, the lock/unlock switches integrated in the door handles and the liftgate/luggage compartment lid release switch. The RFA module communicates the passive key and request data to the BCM over the MS-CAN .

If the RFA module is replaced, it requires:

PMI .
at least two keys must be programmed to it.
parameter reset performed with the BCM .