2014 INFINITI Q50 HYBRID trunk

1. About the Q50 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 in the rear of the
vehicle with battery cable access through the trunk area. 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 behind the rear
seat back with service plug access through the trunk area.
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. FRG–4

1-1.2 Interior
Interior components referenced in this manual are as follows:A. Assist charge gauge B. Energy flow display *1 C. READY indicator (green)
D. Energy flow display *1 E. Trunk lid release switch F. Hood release handle
G. START/STOP switch and ON
indicator lamp (orange) H. Trunk release power cancelswitch
*1: This screen may not be displayed due to customer settings.
A
FGEH
B
C
D
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FRG–6

2. Basic High Voltage System and 12V System Information
2-1 Battery Information
The Q50 HYBRID utilizes two batteries in order to supply both high and low voltage.
2-1.1 Low Voltage Battery• The Q50 HYBRID contains a conventional lead-acid12V battery (A) .
• The 12V battery is located in the trunk on the left side, concealed by a trim cover.
• The 12V battery is charged by the Li-ion battery through the DC/DC converter.
2-1.2 Li-ion Battery • The Q50 HYBRID contains a Li-ion high voltage battery.
• The high voltage battery is mounted in the trunk areabehind the rear seat, enclosed in a metal case and
concealed by trim cover.
• The high voltage battery stores energy at approximately 346 - 400 volts DC.
• A vent hose is provided to exhaust gasses outside the vehicle if necessary.
• An air vent (A) is located on the rear left hand lower C-pillar trim for battery cooling.
The high voltage battery supplies power to the following: • High voltage harnesses
• DC/DC converter
• Traction motor inverter
• Traction motor
• Electric air conditioner compressor
A
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A
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FRG–9

No. Component Location Description Traction Motor Inverter
Engine compartment
(rear passengerside)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.
Traction Motor Built-into the
transmission Converts three-phase alternating current (AC)
power to drive power (torque) which propels
the vehicle.
Lithium-ion (Li-ion)Battery
Trunk area
(behind rear seatback) The Li-ion battery stores and outputs DC
power (Maximum voltage 400V) needed to
propel the vehicle.
DC/DC Converter Trunk area (mounted to top 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 Trunk area
(below parcel shelf;
behind access door
in trim panel) This is used to disable the high voltage system.
12V Battery Trunk area
(left side behind
trim panel) A lead-acid battery that supplies power to the
low voltage devices.
High VoltageHarnesses Trunk area
(on Li-ion 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 compartment
(front driver side)Air conditioner compressor
FRG–11

•Failure to properly shut down the high voltage system before the Emergency
Response 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.
•
When contact with high voltage components or high voltage harnesses is
unavoidable, or when there is risk of such contact, you must always wear appropriate
PPE. PPE must always be worn when touching or working on high voltagecomponents.
•The vehicle contains parts that contain powerful magnets. If a person who is wearing
a pacemaker or other medical device is close to these parts, the medical device may be
affected by the magnets. Such persons must not perform work on the vehicle.
• Be sure to verify that the READY
indicator is off (if possible) , and the high voltage
system is stopped.
• After the high voltage system is shut down, please wait approximately ten (10) minutes for complete discharge of the high voltage capacitor. While waiting, do not operate any
vehicle functions.
NOTE:
The high voltage full discharge takes approximately ten (10) minutes.
• After shutting down the high voltage system and removing the 12V battery negative (-) terminal, wait at least three (3) minutes to discharge the air bag capacitor. Even though the
12V battery negative (-) is disconnected, the Supplemental Restraint System (SRS) air
bag maintains voltage at least three (3) minutes. During this time, there is a possibility of
sudden SRS air bag inflation due to harness short circuit or damage and it may cause
serious injuries.
• The 12V system will remain active even after the 12V battery negative (-) terminal is removed while the high voltage system is active. This is because the charging system
will not shut down and power will be supplied to the 12V system and high voltage systemcontinuously.
Before disconnecting the 12V battery terminal, if necessary, lower the windows, adjust the steering column,
adjust the seats, unlock the doors, open the trunk, etc. as required. Once the 12V battery is disconnected,
power controls will not operate.
FRG–19

Powering Down the High Voltage System
The high voltage system can be shut down with any 1 of the following procedures:• Turn OFF the power switch and disconnect the 12V battery. Refer to
Primary Procedure (FRG–20).
• Disconnect the underhood fuse panel terminal connector for the high voltage control system and disconnect the 12V battery. Refer to
Alternate Procedure 1 (Disconnect Underhood Fuse
Panel) (FRG–23)
.
• Remove the service plug and disconnect the 12V battery. Refer to
Alternate Procedure 2
(Remove Service Plug) (FRG–26)
.
Primary Procedure
NOTE:
Before disconnecting the 12V battery terminal, if necessary, lower the windows, adjust the
steering column, adjust the seats, unlock the doors, etc. Once 12V battery is disconnected,
power controls will not operate.
1. If possible, check the READY
indicator status in the instrument cluster. If it is on, the high
voltage system is active.
2. Place the shift selector in the Park (P) position.
3. Push the ignition switch once to turn OFF the high voltage system. Verify that the READY indicator is off and
then continue to the next steps to open the trunk for
12V battery negative cable access.
If the READY indicator does not turn off, refer to
Alternate Procedure 1 (Disconnect Underhood Fuse
Panel) . (FRG–23)
4. If possible, keep the Infiniti Intelligent Key at least5 meters (16 feet) away from the vehicle (except to
open the trunk as noted below) .
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LOCK
ACC
(OFF)
ON
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FRG–20

5. Open the trunk using any of the following:NOTE:
The trunk release power cancel switch must be
in the ON position in order for the trunk to be
opened using any of the methods below.
a. push-button switch on the lower LH side of theinstrument panel (ensure that the trunk release
power cancel switch is in the ON position) .
b. trunk button on the Infiniti Intelligent Key [press for longer than one (1) second].
c. trunk open request switch (located above license plate)*.
* You must have the Infiniti Intelligent Key within
approximately 1 meter (3 feet) range of trunk
request switch to use the trunk open
request switch function.
NOTE:
If the electrical release does not work,
the trunk will have to be forced open.
OFF
ON
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FRG–21

4. Disengage pawls (A) of underhood fuse panel cover andremove underhood fuse panel cover (1) .
NOTE:
: Arrow in illustration depicts vehicle front
direction.
5. Pull underhood fuse panel (1) out by hand and disconnect terminal (black) connector (A) .
NOTE:
: Arrow in illustration depicts vehicle front
direction.
6. If you cannot identify the connector, disconnect all connectors on the underhood fuse panel.
To avoid unintended reinstallation and risk of electrical shock and severe personal injury
or death, the rescuer should cover the fuse box and connectors with insulated tape or
remove the fuse panel and carry on his/her person.
7. Open the trunk using any of the following:NOTE:
The trunk release power cancel switch must be
in the ON position in order for the trunk to be
opened using any of the methods below.
a. push-button switch on the lower LH side of theinstrument panel (ensure that the trunk release
power cancel switch is in the ON position) .
A
1
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1
A
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OFF
ON
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FRG–24