compression ratio NISSAN ALTIMA 2023 Owners Manual

2 Instruments and controls
Instrument panel................................2-2
Meters and gauges .............................2-4
Speedometer and odometer .................2-4
Tachometer ..................................2-6
Engine coolant temperature gauge ..........2-6
Fuel gauge ................................... 2-7
Distance To Empty (DTE) .....................2-8
Variable Compression Turbo
(if so equipped) ...............................2-8
Warning lights, indicator lights and audible
reminders .......................................2-9
Checking lights .............................. 2-10
Warning/Indicator lights (red) ...............2-10
Warning/Indicator lights (yellow) ............2-12
Warning/Indicator lights (other) .............2-17
Audible reminders ........................... 2-18
Vehicle information display- 5 inch (13 cm)
Type A (if so equipped) ......................... 2-18
How to use the vehicle information
display ...................................... 2-19
Startup display .............................. 2-19
Resetting the drive computer ...............2-20
Oil control system (if so equipped) ...........2-20
Settings ..................................... 2-21
Vehicle information display warnings
and indicators ............................... 2-28Vehicle information display —7 inch (18 cm)
Type B (if so equipped)
......................... 2-34
How to use the vehicle information
display ...................................... 2-35
Startup display .............................. 2-35
Resetting the drive computer ...............2-35
Oil control system (if so equipped) ...........2-36
Settings ..................................... 2-37
Vehicle information display warnings
and indicators ............................... 2-45
Security systems ............................... 2-52
Vehicle security system .....................2-52
NISSAN Vehicle Immobilizer System .........2-54
Wiper and washer switch .......................2-55
Switch operation ............................ 2-55
Rear window and outside mirror
(if so equipped) defroster switch ...............2-56
Headlight and turn signal switch ...............2-57
Headlight control switch ....................2-57
LED

Daytime Running Lights (DRL)
system (if so equipped) ......................2-62
Instrument brightness control ..............2-62
Turn signal switch ........................... 2-63
Fog light switch (if so equipped) .............2-63
Horn ........................................... 2-64

DISTANCE TO EMPTY (DTE)
Displays the estimated distance the ve-
hicle can be driven before refueling. The
value is calculated based on recent fuel
economy, the amount of fuel remaining in
the fuel tank, and the actual fuel
consumption.
Changes in driving patterns or conditions
can cause the DTE value to vary. As a result,
the value displayed may differ from the ac-
tual distance that can be driven.
DTE display will change to “---” when the
fuel level in the tank is getting low, prior to
the fuel gauge reaching 0 (Empty).
NOTE:
• The DTE value af ter refill is estimatedbased on recent fuel economy and
amount of fuel added.
• If a small amount of fuel is added, or the ignition is on during refueling, the
display may not be updated.
• Conditions that affect the fuel economy will also affect the estimated
DTE value (city/highway driving, idle
time, remote start time, terrain, sea-
sonal weather, added vehicle weight,
added deflectors, roof racks, etc.).
VARIABLE COMPRESSION TURBO
(if so equipped)
Your engine is equipped with a variable
compression ratio system called “Variable
Compression Turbo”. This system can vary
the engine compression ratio
continuously.
According to driving conditions, the system
applies optimum compression ratio auto-
matically to achieve both high output and
high fuel economy efficiency. This is not a physical gauge. It is a display
option in the vehicle information display
that can be selected. For additional infor-
mation, see “Vehicle information display”
(P. 2-34).
1Compression ratio status display
Displays the status of compression ra-
tio controlled by Variable Compression
Turbo. The lowest compression ratio
(8:1) and the highest (14:1) are displayed
as “Power” and ”ECO” respectively.
2Turbo charger boost pressure gauge
Displays the turbo charger boost
pressure.
NOTE:
Under some conditions, the compres-
sion ratio may not change. This is not a
malfunction of the system.
CAUTION
If the Variable Compression Turbo be-
comes faulty, the Malfunction Indicator
Light (MIL) may come on. For additional
information, see “Malfunction Indicator
Light (MIL)” (P. 2-15).
LIC4236
2-8Instruments and controls

Unavailable High Cabin Temperature
This message appears when the camera
detects an interior temperature of more
than 104°F (40°C). For additional informa-
tion, see “Automatic Emergency Braking
(AEB) with Pedestrian Detection” (P. 5-135) or
“Lane Departure Warning (LDW)” (P. 5-33).
Unavailable Side Radar Obstruction
This message appears when the Blind
Spot Warning (BSW)/Rear Cross Traffic Alert
(RCTA) systems become unavailable be-
cause a radar blockage is detected. For
additional information, see “Blind Spot
Warning (BSW)” (P. 5-46) or “Rear Cross Traf-
fic Alert (RCTA)” (P. 5-58).
Vehicle ahead detection
indicator
This indicator shows when the following
systems are engaged and have detected a
vehicle:
• Automatic Emergency Braking (AEB) withPedestrian Detection
• Intelligent Forward Collision Warning (I-FCW)
For additional information, see “Automatic
Emergency Braking (AEB) with Pedestrian
Detection” (P. 5-135) or “Intelligent Forward
Collision Warning (I-FCW)” (P. 5-147). The vehicle information display is located
to the lef t of the speedometer. It displays
such items as:
• Vehicle settings
• Indicators and warnings
• Information/warning messages
• Tire pressure information
• Drive computer information
• Cruise control system information
• Driving Aids (if so equipped)
• ProPILOT (if so equipped)
• NISSAN Intelligent Key® operation
information • Audio information
• Compass and navigation information (if
so equipped)
• Variable Compression Turbo information (if so equipped)
• Shif t position
• Distance to empty
• Odometer/twin trip odometer
• Clock and outside temperature
LIC3224
VEHICLE INFORMATION DISPLAY —7
INCH (18 cm) TYPE B (if so equipped)
2-34Instruments and controls

for several seconds during ionospheric tur-
bulence even in areas where no obstacles
exist.
Static: Caused by thunderstorms, electrical
power lines, electric signs and even traffic
lights.
AUDIO OPERATION PRECAUTIONS
MP3 or WMA terms
•MP3 — MP3 is short for Moving Pictures
Experts Group Audio Layer 3. MP3 is the
most well-known compressed digital au-
dio file format. This format allows for near
“CD quality” sound, but at a fraction of the
size of normal audio files. MP3 conversion
of an audio track from CD-ROM can reduce
the file size by approximately a 10:1 ratio
with virtually no perceptible loss in quality.
MP3 compression removes the redundant
and irrelevant parts of a sound signal that
the human ear doesn’t hear.
• WMA — Windows Media Audio (WMA)* is a compressed audio format created by Mi-
crosof t as an alternative to MP3. The WMA
codec offers greater file compression
than the MP3 codec, enabling storage of
more digital audio tracks in the same
amount of space when compared to
MP3s at the same level of quality. • Bit rate — Bit rate denotes the number of
bits per second used by a digital music
file. The size and quality of a compressed
digital audio file is determined by the bit
rate used when encoding the file.
• Sampling frequency — Sampling fre- quency is the rate at which the samples
of a signal are converted from analog to
digital (A/D conversion) per second.
• Multisession — Multisession is one of the methods for writing data to media. Writ-
ing data once to the media is called a
single session, and writing more than
once is called a multisession.
• ID3/WMA Tag — The ID3/WMA tag is the part of the encoded MP3 or WMA file that
contains information about the digital
music file such as song title, artist, encod-
ing bit rate, track time duration, etc. ID3
tag information is displayed on the Artist/
song title line on the display.
* Windows® and Windows Media® are reg-
istered trademarks and trademarks in the
United States of America and other coun-
tries of Microsof t Corporation of the USA.
USB (Universal Serial Bus)
Connection Port
WARNING
• Do not connect, disconnect or oper-
ate the USB device while driving. Do-
ing so can be a distraction. If dis-
tracted you could lose control of your
vehicle and cause an accident or se-
rious injury.
CAUTION
• Do not force the USB device into the
USB port. Inserting the USB device
tilted or up-side-down into the port
may damage the port. Make sure
that the USB device is connected cor-
rectly into the USB port.
• Do not grab the USB port cover (if so
equipped) when pulling the USB de-
vice out of the port. This could dam-
age the port and the cover.
• Do not leave the USB cable in a place
where it can be pulled unintention-
ally. Pulling the cable may damage
the port.
4-46Monitor, climate, audio, phone and voice recognition systems

ENGINE
Model2.5L 4 cylinder (PR25DD engine model) 2.0L 4 cylinder (KR20DDET engine model)
Type Gasoline, 4-cycle, DOHCGasoline, 4-cycle, DOHC
Cylinder arrangement 4-cylinder, inline4-cylinder, inline
Bore x Stroke in (mm) 3.504 x 3.937 (89.0 x 100.0)
when compression ratio = 8 in (mm) 3.307 x 3.547 (84.0 x 90.1)
when compression ratio = 14 in (mm) 3.307 x 3.500 (84.0 x 88.9)
Displacement cu in (cm
3)151.85 (2,488)
when compression ratio = 8 cu in (cm3) 121.86 (1,997)
when compression ratio = 14 cu in (cm3) 120.22 (1,970)
Firing order 1–3–4–21–3–4–2
Idle speed
CVT in N (Neutral) position No adjustment is necessary.
Ignition timing (degree B.T.D.C. at idle speed)
CO%atidle
Spark plug DXE22H11CDILKAR7N9HG
Spark plug gap (Nominal) in (mm)0.043 (1.1) 0.035 (0.9)
Camshaf t operation Timing chainTiming chain
This spark ignition system complies with the Canadian standard ICES-002.
SPECIFICATIONS
Technical and consumer information10-9