Vehicle Collision Detection
As a safety precaution, the Hybrid/EV Powertrain Control Module 2 monitors the collision event messages from the Inflatable Restraint Sensing and Diagnostic Module (SDM). This message is broadcast by the SDM via serial data to inform various control module that a collision event has occurred so they can take appropriate action. This message does not indicate the severity of the collision, nor does it indicate that airbag deployment has been commanded.
If a collision event message is received by the Hybrid/EV Powertrain Control Module 2, it will enter a collision event detected state and respond by opening the high voltage contactors.
If a collision event detected state has occurred, the High Voltage System Inspection , procedure must be performed to ensure the high voltage system has not been compromised. The collision event detected condition will remain active until cleared using the Clear Secured High Voltage DTCs procedure.