2021 ACURA NSX overheating

Contents
This owner’s manual should be considered a permanent part of the
vehicle and should remain with the vehicle when it is sold.
The Navigation Manual is available online at owners.acura.com
(U.S.) or acura.ca (Canada). If you are the firs t registered owner
of your vehicle, you may request a complimentary printed
copy of the Navigation Manual within the first six months of
vehicle purchase. To request a copy, visit owners.acura.com. In
Canada, please request a copy from your Acura dealer.
This owner’s manual covers all models of your vehicle. You may find
descriptions of equipment and features that are not on your
particular model.
Images throughout this owner’s manu al (including the front cover)
represent features and equipment that are available on some, but
not all, models. Your particular mo del may not have some of these
features.
This owner’s manual is for vehicles sold in the United States and
Canada.
The information and specifications in cluded in this publication were
in effect at the time of approval for printing. Honda Motor Co., Ltd.
reserves the right, however, to discontinue or change specifications
or design at any time without notice and without incurring any
obligation.2 Safe Driving P. 33
For Safe Driving P. 34 Seat Belts P. 38 Airbags P. 45
2Instrument Panel P. 73
Indicators P. 74 Gauges and Displays P. 99
2Controls P. 107
Clock P. 108 Locking and Unlocking the Doors P. 109
Operating the Switches Ar ound the Steering Wheel P. 131
Climate Control System P. 159
2 Features P. 165
Audio System P. 166 Audio System Basic Operation P. 170
Customized Features P. 248 HomeLink® Universal Transceiver P. 271
2 Driving P. 313
Before Driving P. 314 Towing a Trailer P. 324
Multi-View Rear Camera P. 373
2Maintenance P. 379
Before Performing Maintenance P. 380 Maintenance MinderTM P. 383
Checking and Maintaining Wiper Blades P. 408
Climate Control System Maintenance P. 423
2Handling the Unexpected P. 435
Tools P. 436 If a Tire Goes Flat P. 437
Overheating P. 454 Indicator, Coming On/Blinking P. 456
If You Cannot Open the Hatch P. 468 Refueling P. 469
2Information P. 471
Specifications P. 472 Identification Numbers P. 474
Emissions Testing P. 477 Warranty Coverages P. 479
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30
Quick Reference Guide
Handling the Unexpected (P 435)
Flat Tire (P 437)
●Park in a safe location and repair the flat
tire using the temporary tire repair kit.
Indicators Come On
(P 456)
●Identify the indicator and consult the
owner’s manual.
Power System Won’t Start
(P 449)
●If the 12-volt battery is dead, jump start
using a booster battery.
Blown Fuse

(P 461)
●Check for a blown fuse if an electrical
device does not operate.
Overheating (P 454)
●Park in a safe location. If you do not see
steam under the hatch, open the hatch,
and let the power system and the engine
cool down.
Emergency Towing
(P 466)
●Call a professional towing service if you
need to tow your vehicle.
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95
uuIndicators uDriver Information Interface Wa rning and Information Messages
Continued
Instrument Panel
MessageConditionExplanation
•Appears when the engine is running and indicates that
the engine oil level is low.• Appears while driving - Immediately stop in a safe
place.
2 If the Low Oil Level Symbol Appears P. 460
•Appears when the engine is running and indicates that
there is a problem with the oil level sensor.• Have your vehicle checked by an authorized Acura NSX
dealer as soon as possible.
• Appears if the engine coolant temperature is
abnormally high.
2 Overheating P. 454
•Appears if there is a prob lem with the fuel system.
Engine performance will be limited.• Immediately stop in a safe place and set the power
mode to VEHICLE OFF, then select the ON mode again.
Have your vehicle checked by an authorized Acura NSX
dealer if the message appears again.
• Appears if there is a tempor ary problem with the gear
shift mechanism and initialization is necessary.• Depress the brake pedal and shift to (P.
•Appears when the transmission is undergoing
initialization.• Keep the brake pedal depressed.
•Appears when a tempor ary problem is fixed.•Initialization will be completed when the engine is
restarted.
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uuGauges and Displays uGauges
100
Instrument Panel
Displays the temperature of the engine coolant.
Shows the remaining High Voltage battery charge level.
■Electric motor
The degree to which the electric motor is being powered is displayed by the readings
on the ASSIST side.
■Battery charge in progress
The degree to which the High Voltage battery is being charged is displayed by the
readings on the CHARGE side.
■Temperature Gauge
■High Voltage Battery Charge Level Gauge
■ASSIST/CHARGE Gauge
1Temperature Gauge
Driving with the temperat ure gauge pointer in the
upper zone can cause serious engine damage. Pull
safely to the side of th e road and allow engine
temperature to return to normal. 2 Overheating P. 454
1High Voltage Battery Charge Level Gauge
The High Voltage battery ch arge level may decrease
under the following conditions:
•When the 12-volt battery has been replaced.
•When the 12-volt battery has been disconnected.•When the High Voltage battery control system
corrects its reading.
The charge level readi ng will be corrected
automatically while driving.
Changes in the temperature of the High Voltage
battery can increase or decrease the battery’s
charging capacity. If temp erature changes cause the
battery’s capacity to change, the number of
indicators in the battery ch arge level gauge may also
change, even if the amount of charging remains the
same.
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411
Maintenance
Checking and Maintaining Tires
Checking Tires
To safely operate your vehicle, your tires must be of the proper type and size, in
good condition with adequate tread, and properly inflated.
■Inflation guidelines
Properly inflated tires provide the best combination of handling, tread life, and
comfort. Refer to the driver’s doorjamb labe l or specifications page for the specified
pressure.
Underinflated tires wear unev enly, adversely affect handling and fuel economy, and
are more likely to fail from overheating.
Overinflated tires make your vehicle ride ha rshly, are more prone to road hazards,
and wear unevenly.
Every day before you drive, look at each of the tires. If one looks lower than the
others, check the pressure with a tire gauge.
At least once a month or before long trips, use a gauge to measure the pressure in all
tires. Even tires in good condition can lose 1 – 2 psi (10 – 20 kPa, 0.1 – 0.2 kgf/cm
2)
per month.
■Inspection guidelines
Every time you check inflation, also examine the tires and valve stems. Look for:
• Bumps or bulges on the side or in the tr ead. Replace the tire if you find any cuts,
splits, or cracks in the side of the tire . Replace it if you see fabric or cord.
• Remove any foreign objects and inspect for air leaks.
• Uneven tread wear. Have an authorized Acura NSX dealer check the wheel
alignment.
• Excessive tread wear.
2 Wear Indicators P. 416
•Cracks or other damage around valve stem.
1Checking Tires
Measure the air pressure when tires are cold. This
means the vehicle has been parked for at least three
hours, or driven less than 1 mile (1.6 km). If
necessary, add or releas e air until the specified
pressure is reached.
If checked when hot, tire pressure can be as much as
4 – 6 psi (30 – 40 kPa, 0.3 – 0.4 kgf/cm
2) higher than
if checked when cold.
Have an authorized Acura NSX dealer check the tires
if you feel a consistent vi bration while driving. New
tires and any that have be en removed and reinstalled
should be properly balanced.
3WARNING
Using tires that are excessively worn or
improperly inflated can cause a crash in
which you can be seriously hurt or killed.
Follow all instruction s in this owner’s
manual regarding tire inflation and
maintenance.
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435
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
ToolsTypes of Tools .................................. 436
If a Tire Goes Flat Temporarily Repairi ng a Flat Tire....... 437
Handling of the Jack ......................... 448
Power System Won’t Start
Checking the Procedure ................... 449
If the Keyless Access Remote Battery is Weak ............................................. 450
Emergency Power System Off........... 451
If the 12-Volt Battery Is Dead .......... 452
Overheating
How to Handle Overheating ............. 454 Indicator, Coming On/Blinking
If the 12-Volt Battery Charging System Indicator Comes On ....................... 456
If the Malfunction Indicator Lamp Comes On or Blinks ................................... 456
If the Brake System Indicator (Red) Comes
On ................................................. 457
If the Electric Power Steering (EPS) System Indicator Comes On ....................... 457
If the Electric Parking Brake System Indicator Comes On ....................... 458
If the Low Tire Pressure/TPMS Indicator
Comes On or Blinks........................ 459 If the Transmission System Indicator Blinks
along with the Warning Message... 460
If the Low Oil Level Symbol Appears.....460
Fuses Fuse Locations ................................. 461
Inspecting and Changing Fuses ........ 465
Emergency Towing ........................... 466
If You Cannot Unlock the Fuel Fill Door.... 467
If You Cannot Open the Hatch............468
Refueling
Refueling from a Portable Fuel Container .... 469
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454
Handling the Unexpected
Overheating
How to Handle Overheating
Overheating symptoms are as follows:
•The temperature gauge pointer is at the mark or the engine suddenly loses
power.
• Steam or spray comes out of the engine compartment.
■First thing to do
1. Immediately park the vehicle in a safe place.
u Put the transmission into
(P and set the parking brake.
2. Turn off all accessories and turn on the hazard warning lights.
u No steam or spray present : Keep the power system on and open the hatch.
u Steam or spray is present : Turn off the power system and wait until it
subsides. Then open the hatch.
1 How to Handle Overheating
NOTICE
Continuing to drive with the temperature gauge
pointer at the mark may damage the engine.
3WARNING
Steam and spray from an overheated
engine can seriously scald you.
Do not open the hatch if steam is coming
out.
H
H
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455
uuOverheating uHow to Handle Overheating
Handling the Unexpected
■Next thing to do
1.Check that the cooling fan is operating and
turn the power system off once the
temperature gauge pointer goes down.
u If the cooling fan is not operating,
immediately turn the power system off.
2. Once the engine has cooled down, inspect
the coolant level and check the cooling
system components for leaks.
2 Checking the Coolant P. 400
uIf the coolant level in the reserve tank is
low, or no coolant in the tank, check that
the radiator is cool. Cover the reserve
tank cap with a heavy cloth and open the
cap. Add coolant until it reaches the
MAX mark, and put the cap back on.
■Last thing to do
Once the engine has cooled sufficiently, turn the power system on and check the
temperature gauge. If the temperature gauge pointer has gone down, resume
driving. If it has not gone down, contact an authorized Acura NSX dealer for repairs.
1 How to Handle Overheating
If the coolant is leaking, contact an authorized Acura
NSX dealer for repairs.
Use water as an emergency/temporary measure only.
Have an authorized Acura NSX dealer flush the
system with proper antifree ze as soon as possible.
3WARNING
Removing the reserve tank cap while the
engine is hot can cause the coolant to spray
out, seriously scalding you.
Always let the engine and radiator cool
down before removing the reserve tank
cap.
Engine Coolant
Reserve Tank
MAX
MIN
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