Systems and methods for activating vehicle functions

A method comprising:

• communicating, using control module having a processor configured to execute instructions stored in a non-transitory computer-readable medium, with a user device over a communication link between the user device and the control module;
• receiving, with the control module, the movement data from the user device over the communication link, the movement data being generated by an accelerometer of the user device and indicating whether the user device is moving;
• receiving, with the control module, location data from the user device over the communication link, the location data being generated by a global positioning system of the user device;
• generating, with the control module, signal strength data by measuring, with at least one sensor, a signal strength of communication signals communicated between the user device and the control module over the communication link;
• determining, with the control module, whether the movement data indicates that the user device moving and whether the location data and the signal strength data each indicate that the user device is approaching the vehicle;
• determining, with the control module, a distance between the user device and the vehicle based on the signal strength data;
• activating, with the control module, a vehicle function of the vehicle in response to (i) determining that the movement data indicates that the user device is moving, (ii) determining that the location data indicates that the user device is approaching the vehicle, (iii) determining that the signal strength data indicates that the user device is approaching the vehicle, and (iv) determining that the distance is less than a threshold distance;
• determining, using the control module, that the user device is not approaching the vehicle in response to determining that at least one of (i) the movement data indicates that the user device is not moving, (ii) the location data does not indicate that the user device is approaching the vehicle, and (iii) the signal strength data does not indicate that the user device is approaching the vehicle;
• determining, using the control module, that the communication link is subject to malicious interference in response to determining that the movement data indicates that the user device is not moving and that at least one of the location data and the signal strength data indicates that the user device is approaching the vehicle;
• and
• generating, using the control module, a communication to the user device indicating that the communication link is subject to malicious interference and refraining, with the control module, from activating the vehicle function in response to determining that the communication link is subject to malicious interference.