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2021 Ford F-350 Owners Manual - Security



Security

The system prevents someone from starting the engine with an incorrectly coded key.

Note: The system is not compatible with aftermarket remote start systems. Use of these may result in engine starting problems and a loss of security.

Note: Metallic objects, electronic devices or a second coded key on the same key chain could cause vehicle starting problems if they are too close to the key when starting the engine. Prevent these objects from touching the coded key when starting the engine. Switch the ignition off, move all objects on the key chain away from the coded key and restart the engine if a problem occurs.

Note: Do not leave a duplicate coded key in your vehicle. Always take your keys and lock all doors when leaving your vehicle.

The system helps prevent the engine from starting unless you use a coded key programmed to your vehicle. Using the wrong key may prevent your vehicle from starting.

A message could appear in the information display.

If you are unable to start your vehicle with a coded key, it is not operating correctly.

A message could appear in the information display.

The system arms when you switch the ignition off.

The system disarms when you switch the ignition on with a coded key.

The active anti-theft system is designed to warn you in the event of unauthorized vehicle entry and is also designed to help prevent unwanted towing of your vehicle. You can choose what is monitored by arming the system in different ways. See Information Displays (page 110).

The direction indicators flash and the horn sounds if the system triggers while the alarm is armed.

Take all remote controls to an authorized dealer if there is any potential alarm problem with your vehicle.

You can select two levels of alarm security. You can change the level of security when the ignition is switched off through the information display with the two options below:

Perimeter only monitors the following:

    Doors.
    Hood.
    Tailgate.

All sensors monitors the following:

    Doors.
    Hood.
    Tailgate.
    Movement inside your vehicle.
    Change in vehicle inclination, for example, unwanted towing.

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Note: Do not choose all sensors monitor mode when the vehicle is in transport or if movement within the vehicle is likely to occur.

Note: For correct operation of the interior motion detection system, make sure you close all the windows prior to arming the system. This helps prevent accidental alarm activation due to external influences.

Additionally, the interior motion sensing system does not arm if any door is ajar.

The alarm is ready to arm when there is not a key in the ignition. Lock your vehicle using the remote control or keyless entry keypad. You can also lock your vehicle using the lock sensor on the exterior door handle if your vehicle is equipped with intelligent access. See Locking and Unlocking (page 66).

The direction indicators flash once after you lock your vehicle. This indicates the alarm is in the pre-armed mode. It fully arms after 20 seconds.

Disarm the alarm by any of the following actions:

    Press the power door unlock button within the 20-second pre-armed mode.
    Unlock the doors with the remote control or keyless entry keypad. If equipped with intelligent access, you can use the unlock sensor on the exterior door handle. See Locking and Unlocking (page 66).
    Switch the ignition on or start your vehicle.
    Use a key in the driver door lock cylinder to unlock your vehicle, then switch the ignition on within 12 seconds.

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