traction control INFINITI QX60 HYBRID 2014 Dismantling Guide

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)
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.
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
AAYIA0070GB
DG–15