Doors, Hood and Trunk: Description and Operation
Handles, Locks, Latches and Entry Systems
NOTE: The Smart Junction Box (SJB) is also known as the Generic Electronic Module (GEM).
Hood Latch
The hood latch consists of the following components:
- Hood latch
- Hood latch striker
- Hood latch release handle and cable
Front Door
The front door consists of the following components:
- Door ajar switch
- Door lock cylinder (driver door only)
- Exterior front door handle
- Front door latch
- Front door lock actuator
- Interior door handle actuating cable
- Interior front door handle
- Keyless entry keypad (if equipped)
Rear Door
The rear door consists of the following components:
- Door ajar switch
- Exterior rear door handle
- Interior door handle actuating cable
- Interior rear door handle
- Rear door latch
- Rear door lock actuator
Liftgate
The liftgate consists of the following components:
- Liftgate ajar switch (part of the liftgate latch)
- Liftgate latch
- Liftgate latch actuator (part of the liftgate latch)
- Liftgate release switch (on the release handle for Expedition and on the rear license plate housing for Navigator)
Liftgate Glass
The liftgate consists of the following components:
- Liftgate glass ajar switch (part of the liftgate glass latch)
- Liftgate glass latch
- Liftgate glass latch actuator (part of the liftgate glass latch)
- Liftgate glass release switch (on the rear license plate housing)
Power Lock/Unlock
The power lock/unlock feature requests all of the vehicle doors locked or unlocked upon a customer request from either interior door lock switch in the vehicle. The power door locking system functions independently of ignition status or vehicle speed.
Autolock
The autolock feature locks all doors when all doors, including the liftgate, are closed, the brake pedal was pressed with the ignition switch in the ON position, and a vehicle speed of 20 km/h (12 mph) or higher is achieved. This feature relocks the doors (when any door is opened then closed) after the brake pedal is pressed, once all doors are read as closed, and the vehicle speed exceeds 20 km/h (12 mph). The autolock feature can be enabled/disabled. Refer to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming.
Auto-Unlock
NOTE: The doors does not auto-unlock if the vehicle has been electronically locked before the driver door is opened.
The auto-unlock feature unlocks all the doors when the ignition is in the RUN position, all the doors are closed, and the vehicle has been in motion at a speed greater than 20 km/h (12 mph), the vehicle then comes to a stop and the ignition is switched to LOCK or ACC, and the driver's door is opened within 10 minutes of the ignition being switched to LOCK or ACC. The auto-unlock feature can be enabled/disabled. Refer to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming.
Smart Unlock
The smart unlock feature prevents the driver door from locking with the key in the ignition lock cylinder. When the SJB receives a lock command from a door lock control switch with the key in the ignition lock cylinder and the driver door open, the SJB commands all the doors to unlock.
The vehicle can still be locked by locking the doors with the push button rods, the door lock cylinder or an RKE command from an Integrated Keyhead Transmitter (IKT) or the keyless entry keypad.
Remote Keyless Entry (RKE)
The RKE system uses an IKT. The IKT incorporates both the Passive Anti-Theft System (PATS) functions and the RKE transmitter functions in a single device.
The RKE transmitter is programmed automatically during PATS programming. During PATS programming, the Instrument Cluster (IC) obtains the Transmitter Identification Code (TIC) from the IKT and sends the TIC data over the Medium Speed Controller Area Network (MS-CAN) to the SJB.
The SJB accepts programming of up to 4 IKTs. 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 IKTs, refer to Key Programming Using Two Programmed Keys or Integrated Keyhead Transmitter (IKT) Key Programming Using Diagnostic Equipment in Anti-Theft - Passive Anti-Theft System (PATS) Key Programming Using Two Programmed Keys. Refer to Remote Keyless Entry (RKE) Transmitter Programming Remote Keyless Entry (RKE) Transmitter Programming for keyfob programming information.
The RKE transmitter initiates the following electronic system functions:
- Unlocks the driver door (with stepped unlock enabled)
- Unlocks all doors
- Locks all doors
- Releases the liftgate window glass (vehicles without power liftgate)
- Activates/deactivates the panic alarm
- Issues a command to open/close the power liftgate (if equipped)
- Issues a command to turn on the interior lamps (when unlocking) and off (when locking), provided the defeat switch on the dimmer switch is not active
- Provides a long flash of the turn signals when UNLOCK is pressed
- Sounds the horn once when LOCK is pressed twice within 3 seconds, and the doors are closed
- Sounds the horn twice when LOCK is pressed twice within 3 seconds, and any door is open
- Flashes the turn signals once for each time LOCK is pressed, and the doors and liftgate are closed
- If any door or liftgate is open, the turn signals does not flash when LOCK is pressed until all doors and the liftgate are closed.
The RKE transmitter has a normal operating range of 10 m (33 ft).
Remote Keyless Entry (RKE) Lock/Unlock Control - Unlock
The RKE feature provides lock/unlock functions independently of ignition status, vehicle speed, or transmission position. The RKE feature provides a 2-step process, if enabled, for unlocking the doors. Upon receipt of the first request for unlocking the doors, the RKE feature requests the SJB to unlock 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 requests that all doors be unlocked. This feature can be disabled so that all the doors unlock on the first press of the UNLOCK button. Refer to Stepped Unlock Programming Stepped Unlock Programming for programming information.
Remote Keyless Entry (RKE) Lock/Unlock Control - Lock
The RKE feature requests that all the doors be locked when the LOCK button is pressed. On any press of the lock button with all doors closed, the RKE feature requests one flash of the turn signals. If any door is ajar, no flash occurs, indicating it locked all the doors but one or more doors are ajar. As soon as the last door is closed, one flash of the turn signals occurs. 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 the doors are closed and locked. If any door is ajar when the second lock request is received within 3 seconds of the first, the RKE feature requests the horn chirp twice without flashing the turn signals to indicate it locked all the doors, but one or more doors are ajar. When the key is in the RUN or START position, no turn signals flashes or horn chirp confirmations occur.
Remote Keyless Entry (RKE) Liftgate Glass Release
The RKE feature provides liftgate glass release function (vehicles without power liftgate only) independently of key position. The liftgate glass release button must be pressed twice within 3 seconds for the liftgate glass to release.
Remote Keyless Entry (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.
Panic Alarm
The panic alarm feature controls activation of the panic alarm, providing audible and visual alarms that are evident from the exterior of the vehicle. The panic alarm feature requests that the turn signals and horn are flashed until deactivation. The flashing of the outputs occurs at the same time. Activation of the panic alarm is accomplished by pressing the PANIC button on an IKT whenever the key is in the OFF or ACC position. At all other times this feature is disabled. Deactivation of an active panic alarm is accomplished by:
- a second press of the IKT PANIC button.
- the ignition switch transitions out of the OFF or ACC position.
- a period of 2 minutes and 45 seconds has elapsed since the initial activation.
Remote Keyless Entry (RKE) Memory Seat Feature
The RKE feature provides a memory seat feature. Up to 2 RKE transmitters can be associated with memory settings. When the unlock button on an RKE transmitter is pressed, the driver seat, adjustable steering column, adjustable pedals, and exterior mirrors move to the desired memory position (the seat, steering column, adjustable pedals and mirror position correspond to the RKE transmitter being used). This feature can be enabled/disabled. Refer to Remote Memory Activation Remote Memory Activation and Remote Memory Deactivation Remote Memory Deactivation for programming information.
Keyless Entry Keypad
The keyless entry keypad (if equipped), located on the exterior of the driver door, provides a method for the customer to access the vehicle without a key or an RKE transmitter. The keyless entry keypad feature:
- Locks all doors
- Unlocks the driver door (stepped unlock enabled)
- Unlocks all doors
- Programs/erases the customer keypad code
- Enables/disables auto-locking
- Enables/disables auto-unlocking
- Releases the liftgate glass
- Illuminates the keypad
- Illuminates the interior lamps
The keyless entry keypad feature operates independently of ignition status, vehicle speed, or transmission position. The keypad is inoperative when the driver door is ajar. When a keypad button is pressed, the keypad buttons illuminate to provide better visibility. If the 7/8 and 9/0 buttons are pressed or 5 seconds have elapsed since the last button press, the illumination is turned off.
Each vehicle equipped with a keyless entry keypad is programmed with a 5-digit entry code. This code is provided to the customer on a wallet card in the Owner's Literature package. In addition, this code is available through a scan tool and printed on the SJB label. When entering codes, each digit must be entered within 5 seconds of the previous button press. In addition to the factory set code, up to 3 personal codes can be programmed. Refer to Keyless Entry Keypad Code Programming Testing and Inspection for programming information.
Anti-Scan Feature
To provide added security, the keyless entry keypad is disabled for 1 minute after pressing any of the buttons 35 times without a valid entry code being entered. The keypad flashes during this 1-minute mode with all functionality disabled except for buttons 7/8 and 9/0 still being allowed to lock the vehicle.
Anti-scan is turned off after any of the following events:
- One minute of keyless entry keypad inactivity has elapsed
- The IKT UNLOCK button is pressed
- The key is turned to the ON position
Unlocking the Doors with the Keyless Entry Keypad System
To unlock the driver door (stepped unlock enabled), enter either the factory set code or the personal code (each digit must be pressed within 5 seconds of the prior digit). This illuminates the interior lamps.
To unlock all doors, enter either the factory set code or the personal code (driver door unlocks) and press the 3/4 button within 5 seconds. If the stepped unlock is disabled, all the doors unlocks upon the entry of the factory set or personal code. Refer to Stepped Unlock Programming Stepped Unlock Programming for programming information.
To unlatch the liftgate glass, enter either the factory set code or the personal code (each digit must be pressed within 5 seconds of the prior digit) and press the 5/6 button within 5 seconds.
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, press the 7/8 and 9/0 buttons at the same time with the driver door closed.
Releasing the Liftgate Glass
To release the liftgate glass, enter the factory set code or a personal code and press the 5/6 button within 5 seconds.
Keyless Entry Keypad Memory Seat Feature
The keypad provides a memory seat feature. The feature is associated with personal codes and positions the driver seat, adjustable steering column, adjustable pedals and exterior mirrors to the Driver 1 or Driver 2 memory setting. Refer to Keyless Entry Keypad Code Programming Testing and Inspection for programming information.