NISSAN 2011 Altima Hybrid - First Responder's Guide - Manual (Page 11)

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DANGER:
The high voltage system may remain powered for up to 10 minutes after the vehicle is shut
off.
The high voltage battery retains high voltage at all times.
High Voltage Safety
High Voltage Safety System
The high voltage safety system is intended to help keep vehicle occupants and emergency responders safe
from high voltage electricity.
A high voltage fuse provides short circuit protection inside the high voltage battery.
The high voltage safety system is insulated from the metal chassis so there is no possibility of electric
shock when touching the chassis.
Positive and negative high voltage power cables are connected to the high voltage battery and are
controlled by normally open system main relays (SMR1 and SMR2). When the vehicle is shut off, the
relays stop electrical flow from leaving the high voltage battery.