relay NISSAN ALTIMA HYBRID 2007 L32A / 4.G Dismantling Guide

High Voltage Safety

High Voltage Safety System

The high voltage safety system is intended to help keep vehicle occupants, technicians 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.

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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.
• 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.

• A ground fault monitor continuously monitors for high voltage leakage to the metal chassis while the
vehicle is running. If a malfunction is detected, the high voltage ECU will illuminate the hybrid system
warning light in the instrument cluster.

• The high voltage battery relays (SMR1 and SMR2) will automatically open to stop the electrical flow in a
frontal collision that is sufficient enough to activate the supplemental restraint system (SRS).



























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