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 system consists of the following components:
- Hood latch
- Primary hood latch release handle and cable
- Secondary hood latch release handle and cable
Front Door
The front door entry system consists of the following components:
- Door ajar switch (part of the front door latch)
- Door lock cylinder
- Exterior front door handle
- Front door latch
- Front door lock actuator (part of the front door latch)
- Interior door handle actuating cable
- Interior door handle
Rear Door, SuperCab
The SuperCab rear door latch system consists of the following components:
- Interior door handle
- Lower rear door latch and cable
- Upper rear door latch and cable
Rear Door, Crew Cab
The Crew Cab rear door latch system consists of the following components:
- Door ajar switch (part of the rear door latch)
- Exterior rear door handle
- Interior door handle
- Interior door handle actuating cable
- Rear door latch
- Rear door lock actuator (part of the rear door latch)
Tailgate
The tailgate latch system consists of the following components:
- Tailgate latches
- Tailgate latch actuating rods
- Tailgate latch release handle
- Tailgate latch remote control
Spare Tire
To prevent theft of the spare tire, the vehicle is equipped with a spare tire lock cylinder.
Power Locks
The power lock/unlock feature requests all of the vehicle doors locked or unlocked upon a customer request from either door lock control switch in the vehicle. The power door locking system functions independently of ignition status or vehicle speed.
Autolock
The autolock feature locks all the doors when the following conditions are met:
- All the doors are closed
- The ignition switch is in the ON position
- The vehicle is shifted into any gear, putting the vehicle in motion
- The vehicle attains a speed greater than 20 km/h (12 mph)
Refer to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock 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.
The auto-unlock feature unlocks all the doors when the following conditions are met:
- The ignition is in the ON position
- All the doors are closed
- The vehicle has been in motion at a speed greater than 20 km/h (12 mph)
- The vehicle then comes to a stop
- The ignition is switched to the LOCK or ACC position
- And the driver door is opened within 10 minutes of the ignition being switched to the LOCK or ACC position
Refer to Autolock and Auto-Unlock Programming Autolock and Auto-Unlock Programming for programming information.
Smart Unlock
The smart unlock feature prevents the doors from locking with the key in the ignition lock cylinder. When the SJB receives a lock command from a door lock control switch only, and the key is in the ignition lock cylinder with one of the front doors open, the SJB commands the doors to lock and then unlock.
The vehicle can still be locked with the ignition key in the ignition cylinder by locking the doors with the push button rods, the door lock cylinder, the keyless entry keypad, or a lock command from a Remote Keyless Entry (RKE) transmitter.
Remote Keyless Entry (RKE)
The SJB accepts programming of up to 4 RKE transmitters. The RKE transmitters can be programmed using a scan tool or by using the Remote Keyless Entry Transmitter Programming procedure. Refer to Remote Keyless Entry (RKE) Transmitter Programming Transmitter for programming information.
The RKE transmitter carries out the following functions:
- Unlocks the driver door
- Unlocks all doors
- Locks all doors
- Activates/deactivates the panic alarm
- Commands the interior lamps on (when unlocking) and off (when locking)
- Provides a long flash of the turn signals when UNLOCK is pressed
- Flashes the turn signals once when LOCK is pressed once and all the doors are closed
- If any door is ajar, the turn signals will not flash when LOCK is pressed until all doors are closed
- Sounds the horn once and flashes the turn signals twice when LOCK is pressed twice within 3 seconds and the doors are closed
- Sounds the horn twice if LOCK is pressed twice within 3 seconds if any door is ajar
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 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 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 the SJB to unlock all the doors. This feature can be configured to global unlock, 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 SJB provides one flash of the turn signals. If any door is ajar, no flash occurs. As soon as the last door is closed, the SJB provides the flash of the turn signals. 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 transmitter feature requests the SJB to chirp the horn twice without flashing the turn signals to indicate all the doors are locked but one or more doors are ajar. When the key 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 are flashed 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 an 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:
- A second press of the RKE transmitter panic button
- The key is switched out of the OFF position
- A period of 2 minutes and 45 seconds has elapsed since the initial activation
Remote Keyless Entry (RKE) Transmitter Memory Seat
The RKE transmitter feature provides a memory position for the seat/adjustable pedals/mirrors/steering column feature. When the unlock button is pressed, the driver seat, the adjustable pedals, the mirrors, and the steering column move to the desired memory position (the seat, pedal, mirror, and steering column position correspond to the 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 in the exterior handle of the driver door, provides a method for the customer to access the vehicle without a key or RKE transmitter. The keyless entry keypad feature:
- Locks all doors
- Unlocks the driver door
- Unlocks all doors
- Programs/erases the customer keypad code
- Enables/disables auto-locking
- Enables/disables auto-unlocking
- Illuminates the keypad
- Illuminates the interior lamps
The keyless entry keypad feature operates independently of key position status, vehicle speed, or transmission position. When a keyless entry keypad button is pressed, the keyless entry keypad buttons illuminate to provide better visibility. If LOCK ALL DOORS is entered or 5 seconds have elapsed since the last button press, the illumination is turned off.
Vehicles equipped with a keyless entry keypad are programmed with a factory set 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 the use of a scan tool and is printed on the SJB label located on the back side of the module (installed position). When entering codes, each digit must be entered within 5 seconds of the previous button press. The SJB accepts the programming of 3 personal entry codes. Refer to Keyless Entry Keypad Code Programming Testing and Inspection for programming information.
Unlocking the Doors with the Keyless Entry Keypad System
To unlock the driver door (with 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 also illuminates the interior lamps.
To unlock all doors with stepped unlock enabled, enter either the factory set code or the personal code (driver door unlocks) and press the 3/4 button within 5 seconds.
To unlock all doors with stepped unlock disabled, enter either the factory set code or the personal code. This also illuminates the interior lamps. Refer to Stepped Unlock Programming Stepped Unlock Programming for information on how to program the stepped unlocking.
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 the doors. To lock all the doors, press the 7/8 and 9/0 buttons at the same time with the driver door closed.
Keyless Entry Keypad Memory Seat Feature
The keypad provides a memory position for the seat/adjustable pedals/mirrors/steering column feature. The feature is associated with the personal entry codes and positions the driver seat, the adjustable pedals, the mirrors, and the steering column to move to the desired memory position (the seat, pedal, mirror, and steering column position correspond to the personal code being used). 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 the button 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 RKE transmitter UNLOCK button is pressed
- The key is turned to the RUN position