Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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 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.
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.