2007 NISSAN ALTIMA HYBRID wheel

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About the Nissan Altima Hybrid

There are two power sources stored on board that are used to drive the vehicle:
• Gasoline is stored in a fuel tank and is used to supply the gasoline engine.
• Electricity is stored in a high voltage battery and is used to power the traction motor.

The result of combining these two power sources is improved fuel economy and reduced emissions. The
gasoline engine also powers an electric generator to recharge the high voltage battery; unlike an entirely
electric vehicle, the Altima Hybrid never needs to be recharged from an external electric power source.

Depending on the driving conditions, one or both sources are used to drive the vehicle. The following
information explains how the Altima Hybrid operates in various driving modes:

1. During light acceleration at low speeds, the vehicle is driven by the traction motor. The gasoline engine
is shut off.

2. During normal driving, the vehicle is driven mainly by the gasoline engine. The gasoline engine also powers the generator to recharge the high voltage battery.

3. During full acceleration, such as climbing a hill, both the gasoline engine and the traction motor drive the vehicle.

4. During deceleration, such as when braking, the vehicle converts kinetic energy from the front wheels to electricity that will recharge the high voltage battery.

5. While the vehicle is stopped, such as at a stoplight, both the gasoline engine and the traction motor are off, however the vehicle remains operational.

Hybrid System

Component Location and Description
Component Location Description
1. Electric Air
Conditioning
Compressor
Engine compartment, front
passenger side
Motor driven electric air conditioning compressor supplied
with 245 volts DC.
2. Electric Power
Steering
Engine compartment, on
steering rack
A 42 volt DC assist motor is used for the electric power
steering (EPS) system.
3. EPS DC/DC
Converter
Trunk area, mounted to top
of high voltage battery
Converts 245 volts DC (high voltage) to 42 volts DC (low
voltage) for the EPS.
4. High Voltage
Battery
Trunk area, mounted to
cross member and behind
rear seat
245 volt DC Nickel Metal Hydride (Ni-MH) battery
consisting of 34 low voltage (7.2 volt) modules connected
in series.
5. DC/DC
Converter

Trunk area, under front left
cover of the high voltage
battery
Converts 245 volts DC (high voltage) to 12 volts DC (low
voltage) for charging the 12 volt battery.
6. Service
Disconnect

Trunk area, on the
passenger side of the high
voltage battery
Used to disable the high voltage system.
7. High Voltage
Harnesses
•Trunk area, on high
voltage battery and EPS
DC/DC converter
•Under passenger side
rear seat and floor pan
•Engine compartment, on
rear, driver side and front
Orange colored power cables carry high voltage direct
current (DC) between the high voltage battery, EPS
DC/DC converter, inverter unit, and electric air
conditioning compressor. There are two cables which also
carry 3-phase alternating current (AC) between the
inverter unit and transaxle.
NOTE:
High voltage cables under the vehicle floor are encased in
a black plastic protector.
8. Transaxle

Engine compartment, on
driver side
Contains a traction motor and generator used to drive the
front wheels and recharge the high voltage battery.
9. Inverter Unit Engine compartment, front
driver side
Changes the 245 volts DC from the high voltage battery to
3-phase 650 volts AC to power the transaxle. The inverter
unit also changes AC electricity from the transaxle to DC
that recharges the high voltage battery.
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Dismantling the High Voltage System

Dismantling of the Altima Hybrid may be performed like conventional Nissan vehicles, except as noted in these
guidelines.

Service Disconnect

1. Immobilize the vehicle
a. Move the shift lever to the P (Park) position.

b. Shut the vehicle OFF by pressing the push-button
ignition switch.

c. Chock the wheels.

d. Set the parking brake.




4. Open the trunk using one of the following methods:
• Intelligent Key button:
Push and hold the trunk release button for longer than
0.5 second to open the trunk.

NOTE:
The trunk release button on the Intelligent Key will not
operate when the ignition switch is in the ON position or
when the trunk cancel switch (located in the glove box) i
in the OFF position.
s





• Trunk release switch:
The trunk switch is located on the left side of the
instrument panel. To open the trunk, push the switch
downward.










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