Principles Of Operation - WithIntelligent Access (IA)

Handles, Locks, Latches and Entry Systems

Principles of Operation - With Intelligent Access (IA)





Transport Mode

The vehicle is placed in a transport 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 mode. Verify the vehicle has exited Transport Mode before attempting to diagnose a Handles, Locks, Latches and Entry Systems concern. For additional information, Refer to Instrumentation, Message Center, and Warning Chimes in Instrument Panel, Gauges and Warning Indicators.

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 (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.

Luggage Compartment/Liftgate Intelligent Access (IA) Antenna

The luggage compartment/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.

Remote Functions Receiver (RFR) Module

The Remote Functions Receiver (RFR) module is hardwired to the RFA (Remote Function Actuator) module and 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.

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 RFR (Remote Functions Receiver) module. The IA (Intelligent Access) key also contains a key blade that is used to enter the vehicle as a backup.

Power Door Locks

The BCM (Body Control Module) monitors the door lock control switch and the driver door lock cylinder. When the BCM (Body Control Module) receives an unlock/lock command from either the door lock control switch or the driver door lock cylinder, the BCM (Body Control Module) energizes a relay (internal to the SJB (Smart Junction Box)) 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 (Body Control Module) 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 (Body Control Module) monitors the door lock status through the unlock switches inside each of the four door latches. The BCM (Body Control Module) 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 (Body Control Module) receives a signal to release the luggage compartment lid/liftgate, the BCM (Body Control Module) 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 (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. With a programmed IA (Intelligent Access) 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 (Intelligent Access) feature from the driver door only unlocks the driver door and the IA (Intelligent Access) feature from the passenger door unlocks all four doors. The IA (Intelligent Access) feature from either front door locks all four doors.

When the RFA (Remote Function Actuator) 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 (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 RFR (Remote Functions Receiver) module. The RFR (Remote Functions Receiver) 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 over the Medium Speed Controller Area Network (MS-CAN) to the BCM (Body Control Module). Depending upon the signal received from the RFA (Remote Function Actuator) module, the BCM (Body Control Module) 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 (Intelligent Access) feature allows the luggage compartment lid to be released without using an RKE (Remote Keyless Entry) transmitter. With a programmed IA (Intelligent Access) 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 (Body Control Module) and the RFA (Remote Function Actuator) module. When the doors are unlocked, the BCM (Body Control Module) receives the signal from the switch and releases the luggage compartment lid/liftgate. When the doors are locked, the BCM (Body Control Module) ignores the input from the switch and only releases the luggage compartment lid/liftgate if it receives a signal from the RFA (Remote Function Actuator) module for the luggage compartment/liftgate IA (Intelligent Access) feature.

When the RFA (Remote Function Actuator) 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 (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 RFR (Remote Functions Receiver) module. The RFR (Remote Functions Receiver) 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 over the MS-CAN (Medium Speed Controller Area Network) to the BCM (Body Control Module) to release the luggage compartment lid/liftgate.

Remote Keyless Entry (RKE)

The IA (Intelligent Access) key transmitter supplies a signal to the RFR (Remote Functions Receiver) module when any button is pressed. The RFR (Remote Functions Receiver) module interprets the information from the IA (Intelligent Access) key and sends a signal 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 over the MS-CAN (Medium Speed Controller Area Network) to the BCM (Body Control Module). Depending upon the signal received from the RFA (Remote Function Actuator) module, the BCM (Body Control Module) either unlocks the driver door, unlocks all 4 doors, locks all 4 doors, or releases the luggage compartment lid/liftgate.

The BCM (Body Control Module) 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.