Post Crash Alert

WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

The post crash alert function is controlled by the SJB . If the Restraints Control Module (RCM) determines an impact of severity enough to deploy the air bags has occurred (the air bags may or may not be deployed by the RCM ), the RCM sends a message to the Instrument Cluster (IC) over the High Speed Controller Area Network (HS-CAN), which sends a message to the SJB over the Medium Speed Controller Area Network (MS-CAN). The SJB activates the post crash alert function by sounding the horn 3 times, then off for 4 seconds, then on 3 times, etc., until the battery dies or the function is turned off. The hazard lamps also flash with the horn sounding, however, the hazard lamps keep flashing during the horn off cycle.

The post crash alert function can be turned off by:

pressing the hazard switch (may need to be pressed more than once).
pressing the Integrated Keyhead Transmitter (IKT) key UNLOCK button.
pressing the PANIC button.

This feature acts similar to a perimeter alarm, but the horn cycle is different. Turning the ignition to the ON position does not deactivate this function.

The post crash alert function cannot be configured off.