NHTSA complaint #11698543

Owner complaint summary

My 12v battery failed and damaged other system components. This is a description of the flaw from a mechanic that had the same problem: There is a major flaw in the Chrysler Pacifica Hybrid. The BPCM (high-voltage battery control unit) has no protection against high-voltage pulses on the 12-volt network. Moreover, the connection diagram of the high-voltage contactors does not contain any elements that could extinguish the counter-induction EMF pulses when the contactors are turned off. That is, when turned off, the contactors in the 12-volt network create high-voltage surges that can burn anything, any block that is connected to the 12-volt network. In my case, the power supply module of the high-voltage battery control unit BPCM was burned. The LG chem battery modules themselves were in perfect order during this malfunction. The circuit of this module is quite complex, the board is multilayered and it was difficult for me to repair it. I have a sloped driveway, and the failure led to my car starting to roll uncontrollably forward into my house. I was luckily able to stop it by throwing blocks under the tires while my wife held down the breaks. When I (or my wife) let go of the powerless vehicle's breaks, it would continue to roll as the power failure prevented the vehicle from either entering park or engaging the emergency break. We barely avoided significant property damage.