Component Description

Passive Anti-Theft System (PATS) - with Intelligent Access (IA)

Component Description

Passive Start Antennas

There are 3 passive start antennas. The passive start antennas are hardwired to the RFA (Remote Function Actuator) module and when activated by the RFA (Remote Function Actuator) module they transmit a low frequency signal that activates an IA (Intelligent Access) key.

Interior Passive Start Antenna Ranges

NOTE: Some brands/types of mobile phone or laptop computer chargers may cause interference that could lead to a PATS (Passive Anti-Theft System) no-start if the IA (Intelligent Access) key is within a few inches of the charger. If a concern is observed, move the IA (Intelligent Access) key away from the charger and attempt to start the vehicle.

There are 3 passive start antennas that are used solely for the purpose of starting the vehicle. When activated, each antenna sends out a low frequency signal with an approximate range of 1 m (3 ft). A programmed IA (Intelligent Access) key must be in range of 1 of the 3 antennas for PATS (Passive Anti-Theft System) to operate. If an IA (Intelligent Access) key is placed in the far outside edges of the interior, like above a sun visor or in a door map pocket, the vehicle might experience a no-start. If the IA (Intelligent Access) key is located in 1 of these areas and there is a no-start condition, move the IA (Intelligent Access) key out of the area and attempt to start the vehicle. If the key is outside the range of a passive start antenna, Key not detected is displayed in the message center.

Passive Anti-Theft System (PATS) Transceiver

The PATS (Passive Anti-Theft System) transceiver reads any key that is placed in the backup slot. When the start/stop switch is pressed and no programmed IA (Intelligent Access) key could be detected, the BCM (Body Control Module) activates the PATS (Passive Anti-Theft System) transceiver. Once the transceiver is activated, it then activates the IA (Intelligent Access) key in the backup slot and receives the key data. Once the transceiver receives the key data, it sends the data to the BCM (Body Control Module).

Intelligent Access (IA) 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. The IA (Intelligent Access) key must be located inside the vehicle for engine starting and on the outside for IA (Intelligent Access) features. During key programming procedures, the PATS (Passive Anti-Theft System) and RKE (Remote Keyless Entry) transmitter of an IA (Intelligent Access) key are both programmed into the RFA (Remote Function Actuator) module and BCM (Body Control Module). The vehicle accepts programming of up to 4 IA (Intelligent Access) keys. REFER to Erase All Keys and Program Two Keys Erase All Keys and Program Two Keys or REFER to Key Programming Using Diagnostic Equipment Key Programming Using Diagnostic Equipment for the key programming procedures.

The IA (Intelligent Access) key also contains a removable mechanical key blade that can be used to unlock the driver door.

Start-Stop Switch

The start/stop switch is a momentary contact switch that is hardwired to the RFA (Remote Function Actuator) module, BCM (Body Control Module), and the PCM (Powertrain Control Module). When the switch is pressed, it signals the RFA (Remote Function Actuator) module, BCM (Body Control Module), and the PCM (Powertrain Control Module) that there is a request to either switch the ignition ON or start the engine. The start/stop switch is connected to both the RFA (Remote Function Actuator) module and BCM (Body Control Module) as a backup in case of a failure. If there is a circuit failure to either module from the start/stop switch, the modules communicate the start/stop switch request to each other over the MS-CAN (Medium Speed Controller Area Network).

Remote Functions Receiver (RFR) Module

The RFR (Remote Functions Receiver) 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 RFR (Remote Functions Receiver) module is a receiving antenna that receives the high frequency signals from an IA (Intelligent Access) key. It also receives the signals from a RKE (Remote Keyless Entry) command.

Remote Function Actuator (RFA)

If the RFA (Remote Function Actuator) module is replaced, at least 2 keys must be programmed to it and a parameter reset with the BCM (Body Control Module) must be performed to enable PATS (Passive Anti-Theft System). REFER to Remote Function Actuator (RFA) .

Body Control Module (BCM)

If the BCM (Body Control Module) is replaced, at least 2 keys must be programmed to it and 2 parameter reset procedures must be performed to enable PATS (Passive Anti-Theft System). The 2 parameter reset procedures are between the BCM (Body Control Module) and RFA (Remote Function Actuator) module, and between the BCM (Body Control Module) and PCM (Powertrain Control Module). REFER to Body Control Module (BCM) .