Handles, Locks, Latches and Entry Systems - with Intelligent Access (IA)
Handles, Locks, Latches and Entry Systems - with Intelligent Access (IA)
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 (Remote Keyless Entry) transmitter, or keyless entry keypad. The power door locking system functions independently of ignition status or vehicle speed.
The IA (Intelligent Access) feature allows easy locking and unlocking of the vehicle and opening the power liftgate without having to use a key.
System Operation
System Diagram
Network Message Chart
Module Network Input Messages - LTM (Liftgate/Trunk Module)
Module Network Input Messages - RFA (Remote Function Actuator) Module
Autolock
The autolock feature locks all of the doors when:
- all the doors are closed
- the ignition is in the RUN position
- the vehicle is shifted into any gear
- the vehicle attains a speed greater than 20 kmh (12.4 mph)
The autolock feature repeats when:
- any door is opened then closed while the ignition is in the RUN position and the vehicle speed is 15 kmh (9.3 mph) or lower
- the vehicle attains a speed greater than 20 kmh (12.4 mph)
The autolock feature can be enabled/disabled. REFER to Autolock Programming 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 ignition is in the RUN position, all the doors are closed and the vehicle has been in motion at a speed greater than 20 kmh (12.4 mph)
- the vehicle has come to a stop and the ignition is turned to the OFF or ACC position
- the driver door is opened within 10 minutes of the ignition being transitioned to the OFF or ACC position
The auto-unlock feature can be enabled/disabled. REFER to Auto-Unlock Programming Auto-Unlock Programming for programming information.
Smart Unlock
The smart unlock feature prevents the doors from electronically locking when an IA (Intelligent Access) key is left inside the vehicle. When a door lock control switch is pressed, the RFA (Remote Function Actuator) module receives a lock message over the MS-CAN (Medium Speed Controller Area Network) from the BCM (Body Control Module), and if an IA (Intelligent Access) key is inside the vehicle with one of the doors open, the RFA (Remote Function Actuator) module commands all of the doors to unlock and the horn will chirp. To override the smart unlock feature and intentionally lock a key in the vehicle, close all of the doors and lock the vehicle using the keyless entry keypad, press the lock button on another IA (Intelligent Access) key, or lock the doors manually with the lock rod before closing the door.
Driver Door Intelligent Access (IA)
NOTE: The IA (Intelligent Access) feature is a programmable parameter and can be enabled/disabled with a scan tool. If the feature is disabled, the IA (Intelligent Access) feature to enter the vehicle and passive starting will be inoperative. To start the vehicle, the IA (Intelligent Access) key has to be placed in the backup slot.
The driver door IA (Intelligent Access) feature allows the doors to be locked or unlocked without having to use the door lock cylinder or the RKE (Remote Keyless Entry) transmitter feature. With a programmed IA (Intelligent Access) key within 1 m (3.28 ft) outside the driver front door, touch the lock or unlock sensor on the exterior door handle. The doors lock or unlock depending upon which sensor was touched on the handle. The unlock button is located on the inside of the handle and the lock button is located on the outside face of the handle.
The driver door IA (Intelligent Access) feature either unlocks just the driver door or all four doors. If stepped unlock is enabled, the driver door is the only door that unlocks from the driver door IA (Intelligent Access) feature. If stepped unlock is disabled, then all four doors unlock. The driver door IA (Intelligent Access) feature always locks all four doors. REFER to Stepped Unlock Programming Stepped Unlock Programming for programming information.
When the RFA (Remote Function Actuator) module detects that a lock or unlock sensor is touched on a front exterior door handle, it activates the low frequency antenna in the corresponding exterior front door handle. The low frequency antenna sends out a signal to the IA (Intelligent Access) key. The low frequency signal activates the IA (Intelligent Access) key and the IA (Intelligent Access) key then sends a high frequency signal back to the TPM (Tire Pressure Monitor) module. The TPM (Tire Pressure Monitor) module interprets the high frequency signal from the IA (Intelligent Access) key and sends the information to the RFA (Remote Function Actuator) module. If the RFA (Remote Function Actuator) module determines that it is a programmed key, it either unlocks the driver door, unlocks all 4 doors, or locks all 4 doors.
Passenger Door Intelligent Access (IA)
NOTE: The IA (Intelligent Access) feature is a programmable parameter and can be enabled/disabled with a scan tool. If the feature is disabled, the IA (Intelligent Access) feature to enter the vehicle and passive starting will be inoperative. To start the vehicle, the IA (Intelligent Access) key has to be placed in the backup slot.
The passenger door IA (Intelligent Access) feature allows the doors to be locked or unlocked without having to use the door lock cylinder or the RKE (Remote Keyless Entry) transmitter feature. With a programmed IA (Intelligent Access) key within 1 m (3.28 ft) outside the passenger front door, touch the lock or unlock sensor on the exterior door handle. The doors lock or unlock depending upon which sensor was touched on the handle. The unlock button is located on the inside of the handle and the lock button is located on the outside face of the handle.
The passenger door IA (Intelligent Access) feature always locks or unlocks all four doors.
When the RFA (Remote Function Actuator) module detects that a lock or unlock sensor is touched on a front exterior door handle, it activates the low frequency antenna in the corresponding exterior front door handle. The low frequency antenna sends out a signal to the IA (Intelligent Access) key. The low frequency signal activates the IA (Intelligent Access) key and the IA (Intelligent Access) key then sends a high frequency signal back to the TPM (Tire Pressure Monitor) module. The TPM (Tire Pressure Monitor) module interprets the high frequency signal from the IA (Intelligent Access) key and sends the information to the RFA (Remote Function Actuator) module. If the RFA (Remote Function Actuator) module determines that it is a programmed key, it either unlocks all 4 doors or locks all 4 doors.
Liftgate Intelligent Access (IA)
NOTE: The IA (Intelligent Access) feature is a programmable parameter and can be enabled/disabled with a scan tool. If the feature is disabled, the IA (Intelligent Access) feature to enter the vehicle and passive starting will be inoperative. To start the vehicle, the IA (Intelligent Access) key has to be placed in the backup slot.
The liftgate IA (Intelligent Access) feature allows the liftgate to be opened without having to use an interior liftgate switch or a RKE (Remote Keyless Entry) transmitter. With a programmed IA (Intelligent Access) key within 1 m (3.28 ft) outside the liftgate, press the liftgate release button on the liftgate, and the power liftgate opens.
When the RFA (Remote Function Actuator) module detects a signal from the exterior liftgate switch, it activates the low frequency antenna in the rear bumper cover. The low frequency antenna sends out a signal to the IA (Intelligent Access) key. The low frequency signal activates the IA (Intelligent Access) key and the IA (Intelligent Access) key then sends a high frequency signal back to the TPM (Tire Pressure Monitor) module. The TPM (Tire Pressure Monitor) module interprets the high frequency signal from the IA (Intelligent Access) key and sends the information to the RFA (Remote Function Actuator) module. If the RFA (Remote Function Actuator) module determines that it is a programmed key, it sends a message to the LTM (Liftgate/Trunk Module) over the MS-CAN (Medium Speed Controller Area Network). When the LTM (Liftgate/Trunk Module) receives an open request message, it opens the liftgate.
Remote Keyless Entry (RKE)
The RKE (Remote Keyless Entry) system uses an IA (Intelligent Access) key. The IA (Intelligent Access) key incorporates both the PATS (Passive Anti-Theft System) and the RKE (Remote Keyless Entry) transmitter functions in a single device. For additional information on the IA (Intelligent Access) key, REFER to Intelligent Access (IA) Key.
The RKE (Remote Keyless Entry) transmitters initiate the following electronic system functions:
- Unlocks the driver door
- Unlocks all doors
- Locks all doors
- Opens the power liftgate
- Arms/disarms the perimeter alarm
- 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
- Recalls the memory seat position associated with a particular remote entry device (when enabled)
- Remotely start the engine (if equipped with the factory installed system)
- 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 ajar
The RKE (Remote Keyless Entry) transmitters have a normal operating range of 20 m (65.62 ft).
RKE (Remote Keyless Entry) Lock/Unlock Control - Unlock
The RKE (Remote Keyless Entry) feature provides lock/unlock functions independently of key position, vehicle speed, or transmission position. The RKE (Remote Keyless Entry) feature provides a stepped (if enabled) process for unlocking the doors. Upon receipt of the first request for unlocking the doors, the RKE (Remote Keyless Entry) 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 (Remote Keyless Entry) 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 Stepped Unlock Programming for programming information.
RKE (Remote Keyless Entry) Lock/Unlock Control - Lock
The RKE (Remote Keyless Entry) 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 (Remote Keyless Entry) transmitter feature chirps the horn twice without flashing the turn signals to indicate it locked all of the doors but one 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 an RKE (Remote Keyless Entry) 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 (Remote Keyless Entry) transmitter panic button
- the ignition is switched out of the OFF position
- a period of 2 minutes and 45 seconds has elapsed since the initial activation
RKE (Remote Keyless Entry) Power Liftgate
The RKE (Remote Keyless Entry) 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
The factory installed remote start is controlled by a RKE (Remote Keyless Entry) transmitter and allows the engine to be started from outside the vehicle. REFER to Remote Start Starting System - without Intelligent Access (IA) for information on the remote start feature.
RKE (Remote Keyless Entry) Transmitter Memory Seat
The RKE (Remote Keyless Entry) transmitter feature provides a memory seat, mirrors, and pedal recall feature. When the unlock button is pressed, the driver's seat, exterior mirrors, and adjustable pedals move to the desired memory position (the seat, mirror, and pedal position corresponds to the transmitter being used). This feature can be enabled/disabled. REFER to Remote Memory Activation Remote Memory Activation and REFER to Remote Memory Deactivation Remote Memory Deactivation for programming information.
Keyless Entry Keypad
The keyless entry keypad carries out the following functions:
- Unlocks the driver door
- Unlocks all the doors
- Locks all doors
- Enables/disables auto-unlocking
- Enables/disables autolocking
- Arms/disarms the perimeter alarm
- Recalls the memory seat position associated with a particular customer key code (when enabled)
- Programs/erases the customer key code
- Illuminates the keyless entry keypad lamp and issues illuminated entry on/off requests
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. When entering codes each digit must be entered within 5 seconds of the previous button press.
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 (Body Control Module) label. NOTE: The code displayed on the scan tool is from the RFA (Remote Function Actuator) module. If it does not match the code on the BCM (Body Control Module) label, reset the keyless entry keypad code. REFER to Remote Function Actuator (RFA) Module Keyless Entry Keypad Code Reset Remote Function Actuator (RFA) Module Keyless Entry Keypad Code Reset.
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 Stepped Unlock Programming for programming information.
Keyless Entry Keypad Memory Seat Feature
The keypad provides a memory seat, mirror, and adjustable pedal recall feature. The feature is associated with the personal entry codes and positions the driver seat, exterior mirrors, and adjustable pedals to the memory 1 or memory 2 setting. REFER to Keyless Entry Keypad Code Programming Keyless Entry Keypad Code 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 (Remote Keyless Entry) transmitter, or the ignition is switched to the RUN position.
Component Description
Door Latch
The door latches are sealed units and contain the door lock actuator and the door ajar switch. The door latches can be lubricated if needed. REFER to Latch Lubrication Procedures.
Liftgate Latch
For information on the power liftgate latch, REFER to Power Liftgate Latch Description and Operation.
Door Lock Control Switch
The door lock control switches receive voltage signals from the BCM (Body Control Module) on the lock and unlock input circuits. When the switch is pressed to lock or unlock, the corresponding input circuit is routed to ground, signalling the BCM (Body Control Module) the occupants request to lock or unlock the doors. The door lock control switches have a dedicated ground circuit.
The BCM (Body Control Module) sends the lock and unlock requests from the door lock control switches to the RFA (Remote Function Actuator) module over the MS-CAN (Medium Speed Controller Area Network).
Keyless Entry Keypad
The keyless entry keypad is a touch sensitive capacitive sensor. When a finger touches the keypad it changes the capacitance of the sensor in the area of the finger touch. The keypad is then able to determine which area was touched and sends a ground signal to the RFA (Remote Function Actuator) module on the corresponding reference circuit(s). The keypad only works when touched with a finger. The keyless entry keypad may not work when gloves are worn. The gloves act as an insulator and do not allow the finger to change the sensor capacitance.
The RFA (Remote Function Actuator) module monitors for a ground signal on the keyless entry keypad signal input circuits. When an individual keypad button is touched, an individual or combination of the input circuits is routed to ground. The RFA (Remote Function Actuator) module then determines which button was touched based on which circuit(s) are grounded. The keypad has dedicated voltage supply and ground circuits.
Liftgate Release Switch
The exterior power liftgate switch is a momentary contact switch that supplies a ground signal to the RFA (Remote Function Actuator) module.
When the exterior liftgate switch is pressed, the RFA (Remote Function Actuator) module activates the power liftgate IA (Intelligent Access) feature.
Intelligent Access (IA) Key
The IA (Intelligent Access) key receives the low frequency signals from the IA (Intelligent Access) antennas. When the IA (Intelligent Access) key is activated by one of the low frequency signals, it sends out a high frequency signal that is received by the TPM (Tire Pressure Monitor) module. The IA (Intelligent Access) key also contains a key blade used to enter the vehicle as a backup.
Exterior Front Door Handles
The exterior front door handles both contain an IA (Intelligent Access) antenna and a capacitive touch lock and unlock sensor. The antennas and lock/unlock sensors are hardwired to the RFA (Remote Function Actuator) module. When a lock or unlock sensor is touched, it signals to the RFA (Remote Function Actuator) module there is an IA (Intelligent Access) request. When the RFA (Remote Function Actuator) module receives the request it activates the IA (Intelligent Access) antenna in the corresponding door handle. The low frequency signal from the IA (Intelligent Access) antenna activates an IA (Intelligent Access) key.
Liftgate Intelligent Access (IA) Antenna
The liftgate IA (Intelligent Access) antenna is hardwired to the RFA (Remote Function Actuator) module and, when activated by the RFA (Remote Function Actuator) module, it transmits a low frequency signal that activates an IA (Intelligent Access) key.
Tire Pressure Monitor (TPM) Module
The TPM (Tire Pressure Monitor) module has a dedicated power and ground. It communicates all IA (Intelligent Access) and RKE (Remote Keyless Entry) information to the RFA (Remote Function Actuator) module through a dedicated single circuit network. The TPM (Tire Pressure Monitor) module is a receiving antenna that receives the high frequency signals from an IA (Intelligent Access) key. It also receives the signals from an RKE (Remote Keyless Entry) command.
REFER to Tire Pressure Monitoring (TPM) Module Description and Operation.
Remote Function Actuator (RFA) Module
The RFA (Remote Function Actuator) module is responsible for controlling the power door locks and the IA (Intelligent Access) features. It uses the antennas in the front exterior door handles and the liftgate IA (Intelligent Access) antenna and the TPM (Tire Pressure Monitor) module to receive the IA (Intelligent Access) key data. The RFA (Remote Function Actuator) module receives direct input from the TPM (Tire Pressure Monitor) module over a dedicated single wire network and is hardwired to the antennas. The power door lock actuators, exterior power liftgate switch, and the keyless entry keypad are also hardwired to the RFA (Remote Function Actuator) module. The RFA (Remote Function Actuator) module receives the door lock control switch input from the BCM (Body Control Module) over the MS-CAN (Medium Speed Controller Area Network).
REFER to Remote Function Actuator (RFA) Description and Operation.