engine NISSAN PATHFINDER HYBRID 2014 R52 / 4.G Dismantling Guide

Table of Contents
FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . DG–2
NISSAN EMERGENCY CONTACT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–2
IMPORTANT INFORMATION ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–2
1. ABOUT THE PATHFINDER HYBRID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–5
1-1 PATHFINDER HYBRID IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–6 1-1.1. EXTERIOR AND ENGINE COMPARTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–6
1-1.2. INTERIOR . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–7
1-2 VEHICLE IDENTIFICATION NUMBER (VIN) LAYOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–8
1-3 WARNING AND INDICATOR LAMP INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–9
2. BASIC HIGH VOLTAGE INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–11
2-1 BATTERY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–11
2-1.1. 12V BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–11
2-1.2. LI-ION BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–11
2-2 HIGH VOLTAGE-RELATED AND 12V-RELATED COMPONENT LOCATIONS AND DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–12
2-3 LI-ION BATTERY PACK SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–13
2-4 HIGH VOLTAGE SAFETY MEASURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–14 2-4.1. WARNING LABEL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–14
2-5 HIGH VOLTAGE SAFETY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–15
2-6 HIGH VOLTAGE CIRCUIT SHUT-OFF SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–16
2-7 PREVENTING ELECTRICAL SHOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–16
3. PREPARATION FOR DISMANTLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–17
3-1 PREPARATION ITEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–18
3-2 PERSONAL PROTECTIVE EQUIPMENT (PPE) AND INSULATED TOOLS . . . . . . . . . . . . . DG–18 3-2.1. PERSONAL PROTECTIVE EQUIPMENT (PPE) PROTECTIVE WEAR CONTROL . DG–18
3-2.2. DAILY INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–19
3-2.3. INSULATED TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–19
3-3 DISCHARGE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–19
3-4 HOW TO HANDLE A DAMAGED VEHICLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–21 3-4.1. HIGH VOLTAGE SYSTEM SHUT-DOWN PROCEDURE . . . . . . . . . . . . . . . . . . . . . DG–21
3-4.2. CUTTING THE VEHICLE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–31
3-4.3. WATER SUBMERSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–34
3-4.4. VEHICLE FIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–34
3-4.5. LI-ION BATTERY DAMAGE AND FLUID LEAKS . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–35
DG–3

1. About the Pathfinder HYBRID
This hybrid electric vehicle (HEV) uses two types of batteries. One is a 12V battery that is the same as the
battery in vehicles powered by internal combustion engines. The 12V battery is located under the hood near
the driver side headlamp. The other is the Lithium-ion (Li-ion) battery (high voltage) for the traction motor
which propels the vehicle. The Li-ion battery is located under the third row seating with service plug access
through the cargo area storage bin.
The high voltage Li-ion battery is recharged with an on-board DC/DC converter and generator powered by
the engine. Additionally, the vehicle system can recharge the Li-ion battery by converting driving force
into electricity while the vehicle is decelerating or being driven downhill. This is called regenerative charging.DG–5

1-1 PATHFINDER HYBRID IDENTIFICATION
1-1.1 Exterior and Engine Compartment
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2. Basic High Voltage Information
2-1 Battery Information
The Pathfinder HYBRID utilizes two batteries in order to supply both high and low voltage.
2-1.1 12V 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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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)
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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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3-1 Preparation Items
Preparation Items Specification Purpose
PPE (personal protective equipment):
Insulated gloves
Up to 1,000V For protection from high voltage electri-
cal shock
Insulated shoes
–
Safety shield
–
Wrenches
Size:10mm To remove the 12V battery terminal bolt.
Solvent resistant protec-
tion gloves
Solvent resistant
protection shoes –
To utilize in the event of a Li-ion battery
electrolytic solution leak.
–
Absorbent pad The same pad used for internal com- bustion engine fluids can be used. To absorb any Li-ion battery electrolytic
solution leakage.
Standard fire fightingequipment Standard fire fighting equipment.
Depending on type of fire (vehicle or
battery) use standard fire fighting
equipment (water or extinguisher) . To extinguish a fire.
Insulated tape Insulating To cover any damaged harnesses to
protect from and prevent electrical
shock. Tape should cover all bare or
damaged wire.
3-2 Personal Protective Equipment (PPE) and Insulated Tools
3-2.1 Personal Protective Equipment (PPE) Protective Wear Control
Perform an inspection of the Personal Protective Equipment (PPE) items before beginning work. Do not use
any damaged PPE items. DG–18

3-2.2 Daily Inspection
This inspection is performed before and after use. The worker who will be using the items should perform
the inspection and check for deterioration and damage.• Insulated rubber gloves should be inspected for scratches, holes and tears. (Visual check and airleakage test)
• Insulated safety boots should be inspected for holes, damage, nails, metal pieces, wear or other problems on the soles. (Visual check)
• Insulated rubber sheet should be inspected for tears. (Visual check)
3-2.3 Insulated Tools
When performing work at locations where high voltage is applied (such as terminals) , use insulated tools
meeting 1,000V/300A specifications.
3-3 Discharge Procedures
Do not perform this procedure if the battery is damaged. If you are unsure of battery
damage, use extreme caution and wear appropriate Personal Protective Equipment (PPE) .
Li-ion battery discharging must take place before dismantling. Sufficient discharging can be achieved by
following these steps. 1. Place the shift selector into the Park (P) position
2. Apply the parking brake.
3. Set wheel chocks to ensure the vehicle is completely immobilized.
4. Fasten the driver seat belt and close the driver door.
5. Apply foot brake and press the ignition switch to turn the system ON. Confirm READY
indicator in instrument cluster turns ON.a. If the engine starts, leave the engine running until reaching normal operating temperature and the idling stops. It may take more than 10 minutes for complete engine warm up and
idling to stop.
b. If the engine is at normal operating temperature and does NOT start, move on to next step.
6. Remove the shift lock cover (A) using a suitable tool.
7. Push down the shift lock (B) as shown in the illustration.
8. Push the shift selector button (C) and move the shift selector to Neutral (N) position (D) while holding down
the shift lock.
NOTE:
DO NOT press accelerator or foot brake after
moving the shift selector to the Neutral (N)
position. Otherwise Li-ion battery will start to becharged.
NOTE:
The engine must not be running at this time. If the engine has restarted, repeat the
previous steps.
B
A
C
D
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9. Release the parking brake.
10. Unbuckle the seat belt and open the driver door. The READY
indicator should remain ON
and the engine should not be running.
11. Turn ON electric devices such as headlamps, A/C (set to the coldest temperature) and rear window defogger to discharge the high voltage battery. Allow approximately 15 minutes to
discharge. Discharge is complete when the READY
indicator (B) (green) turns OFF, the
hybrid system warning indicator (C) (orange) turns ON and the message display indicates “Li-ion
battery low”.
12. Press the ignition switch (A) to turn the system OFF.
Please contact following number if the vehicle could not be discharged. • 1-800-647-7261 (US) or 1-800-387-0122 (Canada)
• Hours of operation are 8am - 5pm (Monday-Friday) Eastern, Central and Pacific time zones.
A
B
C
LOCK
ACC
(OFF)
ON
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23
4
5
6
7
8 1
1/2
PWR
PShift to Park
Li-ion battery low
P
Shift to Park
Li-ion battery low
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3-4.5 Li-ion Battery Damage and Fluid Leaks
The Li-ion battery contains electrolyte solution. To avoid exposure to electrolyte solution
and serious personal injury, always wear appropriate solvent resistant Personal Protective
Equipment (PPE) and read the following precautions:
• Electrolyte solution is a skin irritant.
• Electrolyte solution is an eye irritant – If contact with eyes, rinse with plenty of water andsee a doctor immediately.
• If electrolyte leak occurs, wear appropriate solvent resistant PPE and use a dry cloth to clean up the spilled electrolyte. Be sure to adequately ventilate the area.
• Electrolyte solution is highly flammable
• Electrolyte liquid or fumes that have come into contact with water vapors in the air will create an oxidized substance. This substance may irritate skin and eyes. In these cases,
rinse with plenty of water and see a doctor immediately.
• Electrolyte fumes (when inhaled) can cause respiratory irritation and acute intoxication. Move to fresh air and wash mouth with water. See a doctor immediately.
In cases of battery case breach or electrolyte leakage, contact the fire department immediately. If you must
walk away from the vehicle, notify an appropriate responder of the fact that the vehicle is an electric car and
contains a high voltage system and warn all others.
Li-ion Battery Electrolyte Solution Characteristics: • Clear in color
• Sweet odor
• Similar viscosity to water
• Since the Li-ion battery is made up of many small sealed battery modules, electrolyte solutionleakage should be minimal.
NOTE:
Other fluids in the vehicle (such as engine oil, washer fluid, brake fluid, coolant, etc.) are
the same as those in a conventional vehicle.
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