Post Crash Alert

The SJB  controls the post crash alert. 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 then sends the message to the SJB  over the Medium Speed Controller Area Network (MS-CAN) and the SJB  activates the post crash alert function. The post crash alert function cycles the horn on 3 times, then off for 4 seconds, then on 3 times, etc., in this cycle until the battery dies or the function is turned off. The hazard lights also flash with the horn sounding, but keeps 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. Turning the ignition key to the ON mode does not deactivate this function, but deactivates an activated perimeter alarm.

The post crash alert function cannot be configured off.