Component Description

Passive Key

The passive key incorporates both the PATS and the RKE transmitter functions into a single device. The passive key must be located inside the vehicle for the ignition to transition out of off and outside the vehicle for passive entry features. During key programming procedures, the PATS and the RKE transmitter of the passive key are both programmed into the RFA module. The vehicle accepts programming of up to 8 passive keys.

The passive key receives the low frequency signals from any of the 3 PATS antennas. When the passive key is activated by one of the low frequency signals, it sends out a high frequency signal that is received by the Radio Frequency (RF) receiver. The passive key also contains a removable key blade that unlocks the driver door in the event of an electrical failure (such as a drained battery).

PATS Antennas

NOTE: Some brands/types of mobile phone or laptop computer chargers may cause interference that could lead to a PATS concern if the passive key is within a few inches of the charger and the Key Not Detected message displays in the message center. If a concern is observed, move the passive key away from the charger and attempt to transition the ignition on.

There are 3 passive start antennas. The passive start antennas are wired to the RFA module. When activated by the RFA module, they transmit a low frequency signal that activates a passive key.

The passive start antennas are used for the purpose of starting the vehicle or changing the ignition states. When activated, each antenna sends out a low frequency signal with an approximate range of 1 m (3 ft). A programmed passive key must be in range of 1 of the 3 antennas to be detected.

If a passive key is placed in the far outside edges of the interior, such as above a sun visor or in a door map pocket, the vehicle can experience a no-start condition. If the passive key is located in one of these areas and there is a no-start condition, move the passive key out of that area and attempt to start the vehicle. If the key is outside the range of a passive start antenna when the START/STOP button is pressed, the Key Not Detected message displays in the message center.

RFA Module

If the RFA module is replaced, program at least 2 keys and perform a parameter reset with the PCM.

The RFA module requires PMI when it is replaced.

PCM

If the PCM is replaced, perform the parameter reset procedure. There is no need to program keys if the PCM is replaced.

The PCM requires PMI when it is replaced.