Component Description

WARNING: This page is about a different car, the 2015 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Door Ajar Switch

The door ajar switch is a single pole switch monitored by the BCM. The primary function of the door ajar switch is used for the courtesy lamps system. REFER to: Interior Lighting - System Operation and Component Description .

Hood Ajar Switch

The hood ajar switch is a single pole switch (integrated into the hood latch) that is normally closed when the hood is closed. When the hood is opened, the hood ajar switch opens to indicate an open hood.

The BCM sends a signal to the hood ajar switch, and based on the input, the BCM determines if the hood is open or closed.

Intrusion Sensor

The intrusion sensor is powered at all times and is monitored by the BCM. When the perimeter alarm is armed, the intrusion sensor monitors the passenger compartment for movement and, if movement is detected, it sends a signal to the BCM.

When the intrusion sensor is replaced, the BCM configuration must first be uploaded into a diagnostic scan tool, a new intrusion sensor installed, and then the BCM configuration downloaded back into the BCM for the new intrusion sensor to operate correctly.

BCM

The BCM controls the operation of the perimeter alarm. Based on input, the BCM arms, disarms, activates or deactivates the perimeter alarm.

The BCM requires PMI when replaced. Additionally, at least 2 keys must be programmed and the parameter reset procedure carried out.