Principles Of Operation - With Intelligent Access (IA)
Handles, Locks, Latches and Entry Systems
Principles of Operation - With Intelligent Access (IA)
Intelligent Access (IA) Components
Exterior Front Door Handles
The exterior front door handles both contain an Intelligent Access (IA) antenna and a lock switch. The antennas and lock switches are hardwired to the Remote Function Actuator (RFA) module. When a lock switch is pressed, it signals the RFA module there is an IA request. When the RFA module receives the request it activates the IA antenna in the corresponding door handle. The low frequency signal from the IA antenna activates an IA key.
Luggage Compartment/Liftgate Intelligent Access (IA) Antenna
The luggage compartment/liftgate IA antenna is hardwired to the RFA module and, when activated by the RFA module, it transmits a low frequency signal that activates an IA key.
Remote Functions Receiver (RFR) Module
The Remote Functions Receiver (RFR) module is hardwired to the RFA module and is a receiving antenna that receives the high frequency signals from an IA key. It also receives the signals from an RKE command.
Intelligent Access (IA) Key
The IA key receives the low frequency signals from the IA antennas. When the IA key is activated by one of the low frequency signals, it sends out a high frequency signal that is received by the RFR module. The IA key also contains a key blade that is used to enter the vehicle as a backup.
Power Door Locks
The BCM monitors the door lock control switch and the driver door lock cylinder. When the BCM receives an unlock/lock command from either the door lock control switch or the driver door lock cylinder, the BCM energizes a relay (internal to the SJB) to supply the correct power and grounds for the door lock actuators. The power door locks function independently of ignition status or vehicle speed.
Door Lock Indicator
For a visual indication of the door lock status, the BCM controls the door lock indicator on the door lock control switch. If all 4 doors are locked, the indicator is illuminated. If any one door is unlocked, then the indicator turns off. The BCM monitors the door lock status through the unlock switches inside each of the four door latches. The BCM uses the input from the unlock switches to determine if the indicator should be illuminated or off.
Luggage Compartment Lid/Liftgate Release
The luggage compartment lid/liftgate release system is inhibited when the vehicle speed exceeds 8 km/h (5 mph) and when the vehicle doors are locked. The luggage compartment lid/liftgate latch releases the luggage compartment lid/liftgate when the release switch on the luggage compartment lid/liftgate or on the Remote Keyless Entry (RKE) transmitter is pressed. When the BCM receives a signal to release the luggage compartment lid/liftgate, the BCM supplies voltage to the latch. The luggage compartment lid/liftgate latch then actuates to release the luggage compartment lid/liftgate.
Driver/Passenger Door Intelligent Access (IA) Feature
The driver/passenger door IA feature allows the doors to be locked or unlocked without having to use the door lock cylinder or the RKE transmitter. With a programmed IA key within 1 m (3 ft) of either front door handle outside of the door, press the lock button on the exterior door handle and, depending upon their current state, the doors either lock or unlock. The IA feature from the driver door only unlocks the driver door and the IA feature from the passenger door unlocks all four doors. The IA feature from either front door locks all four doors.
When the RFA module detects that a lock button is pressed 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 key. The low frequency signal activates the IA key and the IA key then sends a high frequency signal back to the RFR module. The RFR module interprets the high frequency signal from the IA key and sends the information to the RFA module. If the RFA module determines that it is a programmed key, it sends a message over the Medium Speed Controller Area Network (MS-CAN) to the BCM. Depending upon the signal received from the RFA module, the BCM either unlocks the driver door, unlocks all 4 doors, or locks all 4 doors.
Luggage Compartment/Liftgate Intelligent Access (IA) Feature
The luggage compartment/liftgate IA feature allows the luggage compartment lid to be released without using an RKE transmitter. With a programmed IA key within 1 m (3 ft) outside of the luggage compartment lid/liftgate, press the release button on the luggage compartment lid/liftgate, and the luggage compartment lid/liftgate latch releases.
The luggage compartment/liftgate release switch is connected to both the BCM and the RFA module. When the doors are unlocked, the BCM receives the signal from the switch and releases the luggage compartment lid/liftgate. When the doors are locked, the BCM ignores the input from the switch and only releases the luggage compartment lid/liftgate if it receives a signal from the RFA module for the luggage compartment/liftgate IA feature.
When the RFA module detects a signal from the luggage compartment lid/liftgate release switch, it activates the low frequency antenna in the rear bumper cover. The low frequency antenna sends out a signal to the IA key. The low frequency signal activates the IA key and the IA key then sends a high frequency signal back to the RFR module. The RFR module interprets the high frequency signal from the IA key and sends the information to the RFA module. If the RFA module determines that it is a programmed key, it sends a message over the MS-CAN to the BCM to release the luggage compartment lid/liftgate.
Remote Keyless Entry (RKE)
The IA key transmitter supplies a signal to the RFR module when any button is pressed. The RFR module interprets the information from the IA key and sends a signal to the RFA module. If the RFA module determines that it is a programmed key, it sends a message over the MS-CAN to the BCM. Depending upon the signal received from the RFA module, the BCM either unlocks the driver door, unlocks all 4 doors, locks all 4 doors, or releases the luggage compartment lid/liftgate.
The BCM requests the illuminated entry feature to turn the interior lamps on when an unlock command is received. If a lock command is received, the illuminated entry feature turns off.