LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 2017 >> Focus S, Automatic DCT Trans, Gas >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Passive Anti-Theft System (Pats) - Vehicles With: Keyless Entry And Push Button Start (Except Electric Vehicle) >> Description And Operation >> Passive Anti-Theft System (PATS) - System Operation and Component Description >> Component Description >> PATS Antennas
April 5, 2026: LEMON Manuals is launched! Read the announcement.

PATS Antennas

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

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

When activated, each PATS 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 for the PATS to operate

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 PATS concern. If the passive key is located in one of these areas and there is a PATS concern, move the passive key out of the area and attempt to transition the ignition on. If the key is outside the range of the PATS antennas when the START/STOP button is pressed, the Key not detected message displays in the message center.

Additionally, the PATS center antenna is used to transmit the key identification code to the RFA module when a passive key is placed in the backup starting location in the event of a passive key battery failure.