Vehicle control system

A system, comprising:

• a contactor system comprising:
• one or more contactors;
• and
• a contactor drive device coupled to the one or more contactors;
• a vehicle control unit coupled to the contactor drive device via a first connection and a second connection configured to provide a controlling signal to the contactor system through at least one of the first connection and the second connection to control the one or more contactors;
• one or more secondary control units coupled to the contactor drive device via the second connection configured to control the one or more contactors according to the controlling signal from the vehicle control unit;
• and
• a fault diagnostic system configured to identify faults occurring in the first connection and the second connection.

A vehicle, comprising:

• an energy storage system;
• a motor drive system coupled to the energy storage system;
• a contactor system comprising:
• an energy storage system contactor coupled to the energy storage system;
• a motor drive system contactor coupled to the motor drive system;
• and
• a contactor drive device coupled to both the energy storage system contactor and motor drive system contactor;
• a vehicle control unit coupled to the contactor drive device via a first connection and a second connection configured to control the contactor system through at least one of the first connection and the second connection;
• a secondary control unit coupled to the contactor drive device via the second connection configured to control the contactor system through the second connection;
• and
• a fault diagnostic system configured to identify faults occurring in the first connection and the second connection.