SYSTEM MAIN RELAY CONTROL: System Description: Description
WARNING: This page is about a different car, the 2012 Infiniti M35h. However, it is still accessible from the selected car via links, so may be relevant.
HPCM controls ON/OFF of the system main relays (system main relays 1 and 2, and pre-charge relay) to connect and disconnect the hybrid system high-voltage circuit.