relay INFINITI M HYBRID 2013 Dismantling Guide

2-5 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.
• Positive and negative high voltage power cables are connected to the high voltage battery and arecontrolled 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. However, it can take up to
ten (10) minutes for the high voltage capacitor to fully discharge. • The high voltage system and high voltage capacitor may remain powered for up to 10
minutes
after the vehicle is shut off.
• The high voltage battery retains high voltage at all times.
• 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 HPCM (hybrid powertrain control module) will
illuminate the hybrid system warning lamp 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) . AAYIA0001GB
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2-6 High Voltage Circuit Shut-Off System
This
vehicle is equipped with a system to shut off the current from the Li-ion battery by the following
methods: Service plug
Positioned in the center area of the Li-ion battery, this plug shuts off the out-
put
of high voltage when manually removed.
System main relays Controlled by the ignition switch, these relays are powered by the 12V sys- tem and shut off high voltage from the Li-ion battery.
Emergency shut-off sys-
tem In the case of a collision (air bag deployment, etc.) or certain system malfunc-
tions this system shuts off the high voltage from the Li-ion battery.
2-7 Preventing Electrical Shock 1. If it is necessary to touch any of the high voltage harnesses or components, always wearappropriate PPE (refer to 3-1 Preparation Items) . Shut off the high voltage system by referring to
3-3.1 High Voltage System Shut-Down Procedure.
2.

To avoid the risk of electrocution, do not touch the inside of the Li-ion battery with bare hands
after shutting off the high voltage system. The Li-ion battery maintains charge even though the
high voltage system is shut down.
3. Cover damaged high voltage components with insulated tape.
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