2021 HONDA RIDGELINE key battery

98
uuIndicators uMulti-Information Display Warn ing and Information Messages
Instrument Panel
MessageConditionExplanation
●Appears after the driver’s door is opened when the
power mode is in ACCESSORY.●Change the power mode to VEHICLE OFF.
2 ENGINE START/STOP Button P. 145
●Appears when you close the door with the power mode
in ON without the smart entry remote inside the vehicle.●Disappears when you bring the smart entry remote back
inside the vehicle and close the door.
2Smart Entry Remote Reminder P. 147
●Appears when the smart entry remote battery becomes
weak.
2Replacing the Button Battery P. 527
●Appears if the smart entry remote battery is too weak to
start the engine or the key is not within operating range
to start the engine.
The beeper sounds six times.●Bring the back of the smart entry remote into contact
with the ENGINE START/STOP button.
2If the Smart Entry Remote Battery is Weak P. 550
●Appears three seconds after the To Start, Hold
Remote Near Start Button, then To Start Engine:
Brake + Push messages appeared sequentially.●Unless you bring the back of the smart entry remote into
contact with the ENGINE START/STOP button, this
message does not appear.
2 If the Smart Entry Remote Battery is Weak P. 550

117Continued
Controls
Locking and Unlocking the Doors
Key
This vehicle comes with the following key:Use the key to start and stop the engine, and
to lock or unlock all the doors or open the
trunk.u The tailgate lock/unlock function is set to
disable as the factory default setting. The
tailgate lock/unlock f unction can be used
by using the audio/information screen.
2 Customized Features P. 298
1Key
All the keys have an immobilizer system. The
immobilizer system helps to protect against vehicle
theft. 2 Immobilizer System P. 136
Follow the advice below to prevent damage to the
keys:
•Do not leave the keys in direct sunlight, or in
locations with high temperature or high humidity.
•Do not drop the keys or set heavy objects on them.•Keep the keys away from liquids, dust and sand.
•Do not take the keys apart except for replacing the
battery.
If the circuits in the keys are damaged, the engine
may not start, and the remote transmitter may not
work.
If the keys do not work properly, have them
inspected by a dealer.
You can remotely start the engine using the remote
engine start. 2 Remote Engine Start P. 387
Smart Entry Remote

uuLocking and Unlocking the Doors uKey
118
Controls
The built-in key can be used to lock/unlock the
doors or open the trunk when the smart entry
remote battery becomes weak and the power
door lock/unlock operation is disabled.
To remove the built-in key, slide the release
knob and then pull out the key. To reinstall
the built-in key, push th e built-in key into the
smart entry remote until it clicks.
Contains a number that you will need if you
purchase a replacement key.
■Built-in Key
Release Knob Built-in Key
■Key Number Tag1
Key Number Tag
Keep the key number tag separate from the key in a
safe place outside of your vehicle.
If you wish to purchase an additional key, contact a
dealer. If you lose your key and you cannot start the
engine, contact a dealer.

133
Controls
Opening and Closing the Trunk
Precautions for Opening/Closing the Trunk
■Opening the trunk
Open the trunk all the way. u If it is not fully opened, the trunk lid may begin to close under its own weight.
■Closing the trunk
Keep the trunk lid closed while driving to:
u Avoid possible damage.
Using the key
If the smart entry remote battery or the ve hicle battery is dead, use the key instead
of the smart entry remote. 1.Swing open the tailgate.
2. Fully insert the key and turn it.
3. Open the trunk.
1Opening and Closing the Trunk
3WARNING
Anyone caught in the path of a tailgate
that is being opened or closed can be
seriously injured.
Make sure that all people are clear of the
tailgate before opening or closing it.

Continued137
uuSecurity System uSecurity System Alarm
Controls
■To deactivate the security system alarm
Unlock the vehicle using the key, remote tra nsmitter, or smart entry system, or the
power mode is set to ON. The system, along with the horn and flashing lights, is
deactivated.
■Setting the security system alarm
The security system alarm automatically sets when the following conditions have
been met:
• The power mode is set to VEHICLE OFF (LOCK).
• The hood is closed.
• All doors and trunk are locked from outsid e with the key, remote transmitter, or
smart entry system.
■When the security system alarm sets
The security system alarm in dicator in the instrument panel blinks and the blinking
interval changes after about 15 seconds.
■To cancel the security system alarm
The security system alarm is canceled wh en the vehicle is unlocked using the key,
remote transmitter, or smart entry system, or when the power mode is set to ON.
The security system alarm indica tor goes off at the same time.
1Security System Alarm
Do not set the security system alarm when someone
is in the vehicle or a window is open. The system can
accidentally activate when:
•Unlocking the door with the lock tab.•Opening the trunk with the trunk release or the
emergency trunk opener.
•Opening the hood with the hood release.
If the battery goes dead after you have set the
security system alarm, the security alarm may go off
once the battery is re charged or replaced.
If this occurs, deactivate the security system alarm by
unlocking a door using the ke y, remote transmitter,
or smart entry system.

Continued389
uuWhen Driving uStarting the Engine
Driving
■To stop the engine1Remote Engine Start
The engine may stop whil e it is running if:
•You do not start the vehicl e within 10 minutes of
starting the engine with the smart entry remote.
•The engine is stopped by using the smart entry
remote.
•There is any antenna failure.
•The security system alarm is not set.•The door is unlocked with the built-in key.
•The hood is open, or any door, or the trunk is
unlocked.
•The transmission is in a position other than ( P.
•The engine coolant temper ature is extremely high.
•The battery is low.•The engine oil pressure is low.
•The Malfunction Indicator Lamp comes on if there
is a problem with the emissions control systems.
Press and hold the
button for one second.
Go within the range, and try again.
The exterior lights will not flash when the remote is out of
the smart entry system range.
The engine will not stop.
The exterior lights flash once if the engine stops
successfully.

527
Maintenance
Remote Transmitter Care
Replacing the Button Battery
If the indicator does not come on when the button is pressed, replace the battery.
1. Remove the built-in key.
2. Remove the upper half of the cover by
carefully prying on the edge with a coin.
u Wrap a coin with a cloth to prevent
scratching the smart entry remote.
u Remove carefully to avoid losing the
buttons.
3. Make sure to replace the battery with the
correct polarity.1Replacing the Button Battery
NOTICE
An improperly disposed of battery can damage the
environment. Always conf irm local regulations for
battery disposal.
Replacement batteries are commercially available or
at a dealer.
3WARNING
CHEMICAL BURN HAZARD
The battery that powers the remote
transmitter can cause severe internal burns
and can even lead to death if swallowed.
Keep new and used batteries away from
children.
If you suspect that a child has swallowed
the battery, seek medical attention
immediately.
Battery type: CR2032
Battery

589
Index
Creeping (Automatic Transmission)........ 394
Cross Traffic Monitor ............................... 477
Cup Holders .............................................. 179
Customer Service Information ................ 585
Customized Features ............................... 298
D
Daytime Running Lights .......................... 153
Dead Battery ............................................ 552
Defaulting All the Settings ...................... 322
Defogger/Heated Door Mirror ................ 159
Defrosting the Windshield and
Windows ................................................. 196
Devices that Emit Radio Waves ............... 577
Dimming
Headlights .............................................. 149
Rearview Mirror ...................................... 164
Dipstick (Engine Oil) ................................ 500
Directional Signals (Turn Signal) ............. 148
Display Button .......................................... 212
Door Mirrors ............................................. 165
Doors ........................................................ 117
Auto Door Locking.................................. 130
Auto Door Unlocking .............................. 130
Door Open Message ........................... 36, 96
Key ......................................................... 117
Locking/Unlocking the Doors from the Inside................................ 16, 127
Locking/Unlocking the Doors
from the Outside................................... 120 Lockout Prevention System ...................... 126
DOT Tire Quality Grading ........................ 519
Driving ....................................................... 363
Adaptive Cruise Control (ACC) ................ 438
Automatic Transmission ........................... 394
Braking .................................................... 468
Off-Highway Driving Guidelines ............... 383
Shifting ................................................... 395
Starting the Engine .................................. 385
Driving Guidelines for Your Utility Vehicle ..................................................... 392
Driving Position Memory System ............. 161
Dust and Pollen Filter ............................... 528
E
Eco Assist® System ...................................... 12
ECON Button ............................................. 403
ECON Mode Indicator ................................ 92
Electric Power Steering (EPS) System Indicator ............................................ 85, 559
Electronic Stability Control (ESC) ............. 412
Emergency ................................................ 568
Emergency Trunk Opener ........................ 135
Emissions Testing (Readiness Codes) ....... 579
Engine Coolant ................................................... 504
If the Battery Is Dead ............................... 552
Oil ........................................................... 499
Remote Engine Start ................................ 387
Starting ................................................... 385 Engine Compartment Cover
.................... 498
Engine Coolant ......................................... 504
Adding to the Radiator ............................ 505
Adding to the Reserve Tank..................... 504
Overheating ............................................ 555
Temperature Gauge ................................ 110
Engine Oil ................................................. 499
Adding .................................................... 501
Checking................................................. 500
Displaying Oil Life .................................... 491
Low Oil Pressure Indicator ................. 79, 557
Recommended Engine Oil ....................... 499
ENGINE START/STOP Button .................... 145
EPS (Electric Power Steering) System
Indicator............................................ 85, 559
Exhaust Gas Hazard (Carbon Monoxide) .................................. 74
Exterior Care (Cleaning) ........................... 531
Exterior Mirrors ........................................ 165
F
Features.................................................... 203
Filters
Dust and Pollen ....................................... 528
Oil ........................................................... 502
Flat Tire ..................................................... 539
Floor Mats ................................................. 530
Fluids Automatic Transmission .......................... 506
Brake ...................................................... 507