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1-3 Warning and Indicator Lamp Information1. Hybrid System Warning Lamp (Orange) 2. READY Indicator (Green)
3. Master Warning Lamp (Orange or Red) 4. Hybrid System Overheated Stop Vehicle Warning (Vehicle Information Display)
1
23
4
5
6
7
8 1
1/2
PWR
1234
Hybrid System
Overheated
AAYIA0263ZZ
FRG–9
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Lamp Name Icon Description
READY Indicator (Green)
This lamp is on when the high voltage system is powered
up and the vehicle is ready to drive.
Master Warning Lamp
(Orange or Red)
This lamp is on when another warning lamp or message is
displayed in the instrument cluster.
Hybrid System Warning
Lamp *1 (Orange)
This lamp is on or blinking when:
• Malfunction has occurred in the high voltage system and/or
• High voltage leak to vehicle chassis and/or
• Emergency shut-off system has been activated. The
shut-off system activates in the following conditions:
– Front and side collisions in which the air bags are deployed.
– Certain rear collisions.
– Certain high voltage system malfunctions.
*1: When this lamp is ON, the READY Indicator will turn OFF. FRG–10
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2. Basic High Voltage System and 12V System Information
2-1 Battery Information
The Pathfinder HYBRID utilizes two batteries in order to supply both high and low voltage.
2-1.1 Low Voltage Battery• The Pathfinder HYBRID contains a conventional lead-acid12 volt battery.
• The 12V battery is located in the front of the vehicle on the left side of the engine compartment, under a trim cover.
• The 12V battery is charged by the Li-ion battery through the DC/DC converter.
: Vehicle front
2-1.2 Li-ion Battery • The Pathfinder HYBRID contains a Li-ion high voltagebattery.
• The high voltage battery is mounted in the cargo area under the 3rd row seating, enclosed in a metal case
and concealed by trim cover.
• The high voltage battery stores approximately 144 volts DC.
• A vent hose is provided to exhaust gasses outside the vehicle, if necessary.
• Air vents (A) are located on the cargo area trim panels for battery cooling.
The high voltage battery supplies power to the following: • High voltage harnesses
• DC/DC converter
• Traction motor inverter
• Traction motor
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AAYIA0301ZZ
AA
AAYIA0264ZZ
FRG–11
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2-2 High Voltage-Related and 12V-Related Component Locations andDescriptions
=
NOTE:
Components with white number in black background are high voltage components.
13
457
2
6
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FRG–12
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No. Component Location Description DC/DC Converter Cargo area floor
(mounted right of
Li-ion battery) The DC/DC converter reduces the voltage of
the Li-ion battery to provide power to the 12V
battery in order to operate the vehicle’s electric
components (headlights, audio system, etc.) .
Service Plug Cargo area floor
(inside storage bin
behind access door) This is used to disable the high voltage system.
Lithium-ion (Li-ion)Battery Cargo area floor
(under 3rd row
seating floor trim) The Li-ion battery stores and outputs DC
power (Maximum voltage 144V) needed to
propel the vehicle.
Traction Motor Engine compart-
ment (built-into thetransmission) Converts three-phase alternating current (AC)
power to drive power (torque) which propels
the vehicle.
Traction MotorInverter Engine compart-
ment (front driverside) Converts the DC power stored in the Li-ion
battery to three-phase AC power and controls
motor torque (revolution) by regulating the
motor current. The inverter has a built in high
voltage capacitor.
12V Battery Engine compart-
ment (front driverside) A lead-acid battery that supplies power to the
low voltage devices.
High Voltage Har-ness Cargo area (on
Li-ion battery) ,
under floor, enginecompartment Orange-colored power cables carry high DC
voltage between each of the high voltage com-ponents.
2-3 Li-ion Battery Pack Specifications
Li-ion Battery Specifications
Li-ion battery voltage 144V
Number of Li-ion battery modules in the pack 3 modules (40 cells)
Li-ion battery module voltage 48V each
Li-ion battery dimensions 36.31 x 22.07 x 6.52 in. (922.3 x 560.5 x 165.6 mm)
Li-ion battery weight 62.4 lbs (28.3 kg)
FRG–13
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2-4 High Voltage Safety Measures
Circuit insulation The high voltage positive (+) and negative (-) circuits are insulatedfrom the metal chassis.
Reducing the risk of electrocution The high voltage components and harnesses have insulated cases or orange-colored coverings which provide insulation and easy identification.
The high voltage battery case is electrically connected to the vehicle ground.
This connection helps protect the vehicle occupants and emergency
responders from high voltage electrical shock.
Identification The high voltage components are labeled “WARNING” similar to label shown below. All high voltage harnesses are coated in orange.
2-4.1 Warning Label
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FRG–14
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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
approximately 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
approximately 10 minutes after the vehicle is shut off. Personal Protective Equipment
(PPE) must always be worn when touching or working on high voltage components
to avoid risk of electrical shock and severe personal injury or death.
• The high voltage battery retains high voltage at all times. PPE must always be worn when touching or working on high voltage components to avoid risk of electrical shock and
severe personal injury or death.
• 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.
Cargo Area
Junction Box Li-ion Battery
System main relay 1
Service Plug (With Fuse)
System main relay 2
Transmission
Traction Motor Traction
Motor Inverter
(With built in high
voltage capacitor) DC/DC
Converter
HPCM
(Hybrid Powertrain Control Module)
Engine Compartment
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FRG–15
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• The high voltage battery relays (SMR1 and SMR2) will automatically open to stop the electrical flowin a front, side or certain rear collisions that are sufficient enough to activate the supplemental
restraint system (SRS) .
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 right rear area of the Li-ion battery, this plug shuts off the output of high voltage when manually removed.
System main relays
(located in the high voltagebattery) 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 (front and side collisions in which the air bags are
deployed, certain rear collisions) or certain system malfunctions this system
is designed to shut 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 Personal Protective Equipment (PPE) [refer to
3-1 Preparation Items (FRG–18)].
Shut off the high voltage system by referring to
3-3.1 High Voltage System Shut-Down
Procedure (FRG–20)
.
2. To avoid the risk of electrocution, NEVER 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. PPE must always be worn when touching or working on high
voltage components.
3. Cover damaged high voltage components with insulated tape.
2-8 Emergency Medical Equipment
The high voltage system should not interfere with emergency medical equipment which must be used in or
near the vehicle at an accident scene. FRG–16
