Post Crash Alert

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 Panel Cluster (IPC) 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) and 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) UNLOCK button.
• pressing the IKT  PANIC button.

This feature acts similar to the perimeter alarm, but the horn cycle is different. The perimeter alarm function sounds the horn on and off, in regular intervals until 2 minutes and 45 seconds have elapsed, the battery dies or the function is deactivated. Turning the ignition to the ON position does not deactivate the post crash alert function, but deactivates an activated perimeter alarm. The post crash alert function cannot be configured off.