Component Description

Handles, Locks, Latches and Entry Systems - with Intelligent Access (IA)

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 .

Liftgate Latch

For information on the power liftgate latch, REFER to Power Liftgate Latch .

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 .

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) .