INFINITI Q50 HYBRID 2018 Dismantling Guide

2-2 High-voltage-Related and 12-Volt-Related Component Locations and
Descriptions
NO
TE:
Components with white number in black background are high-voltage components. No. Component
LocationDescription
T

raction Motor
Inverter
Engine compartment
(right rear side)Converts the DC power stored in the high-
voltage 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. 51 3 4
6
7 2
AAYIA0181ZZ
DG–11

No. Component
LocationDescription
T
raction Motor Built-into the transmission Converts three-phase alternating current (AC)
power to drive power (torque) which propels
the vehicle.
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-
voltage 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
vehicle’s electric components (headlights,
audio system, etc.) .
Service Plug Trunk area (below
parcel shelf; behind
access door in trim
panel) This is used to disable the high-voltage system.
12-volt Battery Trunk area (left side
behind trim panel) A lead-acid battery that supplies power to the
low voltage devices.
High-voltage
Harnesses Trunk area (on high-
voltage battery) ,
under floor pan,
engine compartment Orange-colored power cables carry high DC
voltage between each of the high-voltage
components.
Electric Air
Conditioner
Compressor
Engine compartment
(front driver side)Air conditioner compressor
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 modules (96 cells)
High-voltage battery module voltage 28.8V each
High-voltage battery dimensions 29.63 x 17.81 x 14.85 in.
(752.5 x 452.4 x 377.1 mm)
High-voltage battery weight 108.05 lbs (49 kg)
2-4 High-voltage Safety Measures Circuit insulation
The high-voltage positive (+) and negative (-) circuits are insulated
from
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.
DG–12

2-4.1 Warning Labels
The
following labels are applied to the air duct located in the engine compartment.
The following warning label is applied to the high-voltage battery located inside the luggage compartment
near the service plug access opening. WARNING/AVERTISSEMENT
To avoid serious injury, keep clear engine parts at all times. Engine ma\
y start at any time if the start switch and the the READY lamps
on the instrument panel are "ON". Make sure both lamps are "OFF" before \
working in the engine compartment. See Owners Manual.
P

our 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 à I'intérieur du compart\
iment moteur. Le moteur peut démarrer à tout moment si le contacte\
ur
d'allumage est à la position ON et que les témoins READY du tablea\
u de bord sont allumés. Assurez-vous que les deux
témoins sont éteints avant de travailler dans le compartiment mote\
ur. Reportez-vous au manuel du conducteur.
BW A R N I N G / A V E R T I S S E M E N T / A C H T U N G
Make sure READY lamp is "OFF" before working in the

engine compartment.
Assurez-vous que les témoin READY est "OFF" avant de travailler dans le compartiment du moteur.
Bitte gehen Sie sicher, dass die READY-Kontrolleuchte "AUS" ist, bevor Sie jegliche Arbeit
im Motorraum beginnen. D AAYIA0419ZZ
AAYIA0455ZZ
DG–13

The following warning label is applied to the high-voltage battery located inside the luggage compartment.
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. AAYIA0456ZZ
DG–14

• 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 front, side or certain rear collisions that are sufficient enough to activate the supplemental
restraint system (SRS) . Trunk
J

unction 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 DANGER
HPCM
(Hybr

id Powertrain
Control Module)
AAYIA0156GB
DG–15

2-6 High-voltage Circuit Shut-Off System
This
vehicle is equipped with a system to shut off the current from the high-voltage battery by the following
methods: Service plug
Positioned in the center area of the high-voltage battery, this plug shuts off
the
output of high-voltage when manually removed.
System main relays
(located in the high-
voltage battery) Controlled by the ignition switch, these relays are powered by the 12-volt
system and shut off high-voltage from the high-voltage battery.
Emergency shut-off
system 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 high-voltage 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 (DG–18)].
Shut

off the high-voltage system by referring to 3-4.1 High-voltage System Shut-Down
Procedure

(DG–21) .
2.

To avoid the risk of electrocution, NEVER touch the inside of the high-voltage battery with bare
hands after shutting off the high-voltage system. The high-voltage 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.
DG–16

3. Preparation for Dismantling
DANGER
• Failure to properly shut down the high-voltage electrical system before the
Dismantling Procedures are performed will result in serious injury or death from
electrical shock. To prevent serious injury or death, NEVER touch high-voltage
harnesses or components without always wearing appropriate Personal Protective
Equipment (PPE) . PPE must always be worn when touching or working on high-
voltage components.
• If it is necessary to touch any of the high-voltage harnesses or components you
must
always wear appropriate PPE to avoid electrical shock. PPE must always be worn
when touching or working on high-voltage components. Shut down the high-voltage
system by following the steps outlined in 3-4.1 High-voltage System Shut-Down
Procedure

(DG–21) . Wait approximately ten (10) minutes for complete discharge of
the

high-voltage capacitor after the high-voltage system has been shut down. • NEVER assume the Q50 HYBRID is shut OFF simply because it is quiet.
•

If it becomes necessary for the dismantler to leave the vehicle, place a “DANGER” sign
[for example, refer to 5. Storing the Vehicle (DG–40)] on the vehicle to alert other people
that

the vehicle contains a high-voltage battery.
• If the READY indicator is ON the high-voltage system is active.
•

If possible, be sure to check the READY indicator on the instrument cluster and
verify

that the READY indicator is OFF and the high-voltage system is stopped.
DG–17

3-1 Preparation Items
Preparation Items
SpecificationPurpose
PPE
(personal protective equipment): Up to 1,000V For protection from high-
voltage electrical shock.
Insulated gloves Insulated shoes
–
Safety

shield –
T
o protect eyes when around
high-voltage components and
wiring.
Safety Glasses Leather gloves Must 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 solution
leakage.
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 InsulatingTo cover any damaged
harnesses to protect from
and prevent electrical shock.
Tape should cover all bare or
damaged wire.
DG–18

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.
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 DANGER
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) .
High-voltage 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 on until the idling stops.
b. If the engine does NOT start, move on to next step.
DG–19

6. Remove the shift lock cover (A) using a suitable tool.
7.
Push down the shift lock (B) using mechanical key
as shown in the illustration.
8. Push the shift selector button (C) and move the shift selector to the 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 high-voltage battery will start
to be charged.
NOTE:
The engine must not be running at this time. If the engine has restarted, repeat the previous
steps.
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. Discharge is complete when the READY indicator (B) (green) turns OFF, and the hybrid system warning indicator (C) (orange)
turns

ON.
12. Move shift selector into the Park (P) position and press the ignition switch (A) to turn the system OFF.
Please contact following number if the vehicle could not be discharged. • 1-800-662-6200 (US) or 1-800-361-4792 (Canada)
• Hours of operation are 8am - 5pm (Monday-Friday) Eastern, Central and Pacific time zones. A
B C
D
TGAAYIA0001GB
DG–20