Theory Of Operation
WARNING: This page is about a different car, the 2014 Fiat 500e. However, it is still accessible from the selected car via links, so may be relevant.
The Battery Pack Control Module (BPCM) immediately shuts down the high voltage system and sets the Controlled System Shutdown DTC whenever the following conditions are present:
- A Vehicle Impact signal is received from the Body Control Module (BCM).
- The BPCM detects a loss of communication with the BCM.
- The Electric Vehicle Control Unit (EVCU) sends a message to the BPCM indicating a vehicle impact has occurred.
The BPCM disables the high voltage system until the condition is corrected and the fault is cleared with the scan tool.