2018 INFINITI Q70 HYBRID engine

Table of Contents
FOREWORD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . DG–2
INFINITI EMERGENCY CONTACT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–2
IMPORTANT INFORMATION ABOUT THIS MANUAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–2
1. ABOUT THE INFINITI Q70 HYBRID . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–5
1-1 Q70 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–10 2-1 BATTERY INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–10
2-1.1 12-VOLT BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–10
2-1.2 HIGH VOLTAGE BATTERY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–10
2-2
HIGH VOLTAGE-RELATED AND 12-VOLT-RELATED COMPONENT LOCATIONS AND
DESCRIPTIONS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–11
2-3 HIGH VOLTAGE BATTERY PACK SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–12
2-4 HIGH VOLTAGE SAFETY MEASURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–13 2-4.1 WARNING LABELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–13
2-5 HIGH VOLTAGE SAFETY SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–14
2-6 HIGH VOLTAGE CIRCUIT SHUT-OFF SYSTEM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–15
2-7 PREVENTING ELECTRICAL SHOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–15
3. PREPARATION FOR DISMANTLING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–16
3-1 PREPARATION ITEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–17
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–18
3-2.3 INSULATED TOOLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–18
3-3 DISCHARGE PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–18
3-4 HOW TO HANDLE A DAMAGED VEHICLE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–19 3-4.1 HIGH VOLTAGE SYSTEM SHUT-DOWN PROCEDURE . . . . . . . . . . . . . . . . . . . . . DG–19
3-4.2 CUTTING THE VEHICLE BODY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–28
3-4.3 WATER SUBMERSION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–31
3-4.4 VEHICLE FIRE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DG–31
3-4.5 HIGH VOLTAGE BATTERY DAMAGE AND FLUID LEAKS . . . . . . . . . . . . . . . . . . . . DG–32
DG–3

1. About the INFINITI Q70 HYBRID
This hybrid electric vehicle (HEV) uses two types of batteries. One is a 12-volt battery that is the same as
the battery in vehicles powered by internal combustion engines. The 12-volt battery is located behind the
rear seat back with battery cable access through the trunk area. The other is the high voltage battery for the
traction motor which propels the vehicle. The high voltage battery is located behind the rear seat back with
service plug access through the trunk area.
When the high voltage battery level is low, engine output is used to generate power from the traction motor
and charge the high voltage battery. Additionally, the vehicle system can recharge the high voltage 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 Q70 HYBRID IDENTIFICATION
1-1.1 Exterior and Engine Compartment
AAYIA0407ZZ
DG–6

1-2 Vehicle Identification Number (VIN) Layout
In exterior appearance the Q70 HYBRID is nearly identical to the conventional Infiniti Q70 series vehicles.
The vehicle identification number can be located as follows:
Example VIN : JN1EY1APXJM005523
The Q70 HYBRID is identified by the 4th alphanumeric character: E
E = Q70 HYBRID
1. VIN plate (visible through windshield) 2. Vehicle certification label
(lower center pillar)3. Vehicle identification number
(engine compartment, RH side
of cowl)
TGAAYIA0013ZZ
DG–8

No. Component Location Description High Voltage Battery Trunk area (behind
rear seat back) The high voltage battery stores and outputs
DC power (Maximum voltage 400V) needed to
propel the vehicle.
DC/DC Converter Trunk area (mounted
to top of high volt-
age battery) The DC/DC converter reduces the voltage of
the high voltage battery to provide power to
the 12-volt battery in order to operate the vehi-
cle’s electric components (headlights, audio
system, etc.) .
Service Plug Trunk area (below
parcel shelf; behind
access door in trimpanel) This is used to disable the high voltage system.
12-volt Battery Trunk area (below
parcel shelf; behind
trim panel left of
high voltage battery) A lead-acid battery that supplies power to the
low voltage devices.
High VoltageHarnesses Trunk area (on high
voltage battery) ,
under floor pan,
engine compartment Orange-colored power cables carry high DC
voltage between each of the high voltagecomponents.
Electric Air Condi-
tioner Compressor Engine compart-
ment (front driverside) Air conditioner compressor
Traction MotorInverter Engine compart-
ment (right rearside) Converts the DC power stored in the high volt-
age battery to three-phase AC power and con-
trols motor torque (revolution) by regulating the
motor current. The inverter has a built in high
voltage capacitor.
Traction Motor Built-into the
transmission Converts three-phase alternating current (AC)
power to drive power (torque) which propels
the vehicle.
2-3 High Voltage Battery Pack Specifications
High Voltage Battery Specifications
High voltage battery voltage 346V (400V max.)
Number of high voltage battery modules in the pack 12
High voltage battery module voltage 28.8V each
High voltage battery dimensions 33.35 x 17.83 x 15.43 in. (847 x 453 x 392 mm)
High voltage battery weight 121.28 lbs (55 kg)
DG–12

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
vehicle dismantlers from high voltage electrical shock.
Identification The high voltage components are labeled “WARNING” similar to the label shown below. All high voltage harnesses are coated in orange.
2-4.1 Warning Labels
To avoid serious injury, keep clear of engine parts at all times. Engine may start at any time if

the start switch and the READY lamps on the instrum ent panel are "ON". Make sure both
lamps are "OFF" before working in the engine compartment. See Owners Manual.
¾¯¸æ /WARNING/AVERTISSEMENT
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Pour éviter des blessures graves, assurez-vous que les témoins START SWITCH et READY

dans le tableau de bord sont éteints (OFF) avant d' entreprendre tout travail a l' intérieur du
compartiment moteur. Le moteur peut démarrer a tout moment si le contacteur d' allumage
est a la position ON et que les témoins READY du ta bleau de bord sont allumés. Assurez-vous
que les deux témonins sont éteints avant de travailler dans le compartiment moteur.
Reportez-vous au manuel du conducteur.ÉË º¦
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À
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READY
A
AAYIA0410ZZ
AAYIA0010ZZ
DG–13

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.
•
The high voltage battery relays (SMR1 and SMR2) will automatically open to stop the electrical flow in
a front, side or certain rear collisions that are sufficient enough to activate the supplemental restraint
system (SRS) .
Trunk
Junction Box High Voltage 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) Electric
Compressor DC/DC
Converter
Engine Compartment
HPCM
(Hybrid Powertrain Control Module)
AAYIA0124GB
DG–14

3-1 Preparation Items
Preparation Items Specification Purpose
PPE (personal protective equipment): Up to 1,000V For protection from high voltage electrical shock.
Insulated gloves
Insulated shoes
–
Safety shield
– To protect eyes when around
high voltage components andwiring.
Safety Glasses
Leather glovesMust be able to fasten tight
around the wrist (worn over
insulated gloves) . To protect insulated gloves.
Wrenches
Size:10mm To remove the 12-volt battery terminal bolt.
Solvent resistant protection gloves
Solvent resistant protection shoes – To utilize in the event of a high
voltage battery electrolytic
solution leak.
Absorbent pad The same pad used for internal combustion engine
fluids can be used.To absorb any high voltage
battery electrolytic solutionleakage.
Standard fire fighting equipment 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.
DG–17