2021 HONDA RIDGELINE dead battery

Contents
Child Safety P. 59Exhaust Gas Hazard P. 74Safety Labels P. 75
Tailgate P. 131 Opening and Closing the Trunk P. 133
Moonroof* P. 143 Operating the Switches Around the Steering Wheel P. 145
Interior/Exterior Convenience Items P. 175Climate Control System P. 195
Audio System Basic Operation P. 211 Audio Error Messages P. 278
Customized Features P. 298
Off-Highway Driving Guidelines P. 383 When Driving P. 385 Honda Sensing® P. 423
Multi-View Rear Camera P. 481 Refueling P. 483 Fuel Economy and CO
2 Emissions P. 486
Maintenance Under the Hood P. 496 Replacing Light Bulbs P. 508
Checking and Maintaining Tires P. 516 Battery P. 525 Remote Transmitter Care P. 527
Cleaning P. 529 Accessories and Modifications P. 535
Engine Does Not Start P. 549If the Battery Is Dead P. 552
Fuses P. 562 Emergency Towing P. 568
If You Cannot Unlock the Tailgate P. 570 Refueling P. 571
Devices that Emit Radio Waves P. 577 Reporting Safety Defects P. 578
Authorized Manuals P. 584 Customer Service Information P. 585
Quick Reference GuideP. 6
Safe DrivingP. 31
Instrument PanelP. 77
ControlsP. 115
FeaturesP. 203
DrivingP. 363
MaintenanceP. 487
Handling the UnexpectedP. 537
InformationP. 573
IndexP. 587

26
Quick Reference Guide
Handling the Unexpected (P537)
Flat Tire (P539)
●Park in a safe location and replace the
flat tire with the compact spare tire
located in the trunk.
Indicators Come On (P557)
●Identify the indicator and consult the
owner’s manual.
Engine Won’t Start (P549)
●If the battery is dead, jump start using a
booster battery.
Blown Fuse (P562)
●Check for a blown fuse if an electrical
device does not operate.
Overheating (P555)
●Park in a safe location. If you do not see
steam under the hood, open the hood,
and let the engine cool down.
Emergency Towing (P568)
●Call a professional towing service if you
need to tow your vehicle.

Continued125
uuLocking and Unlocking the Doors uLocking/Unlocking the Doors from the Outside
Controls
■Locking the doors
Press the lock button.
Once: u Some exterior lights flash, all the doors
lock, and the security system sets.
Twice (within five se conds after the first
push):
u Some exterior lights flash, the beeper
sounds and verifies the security system is
set.
■Unlocking the doors
Press the unlock button.
Once:
u Some exterior lights flash twice, and the
driver’s door unlocks.
Twice: u Some exterior light s flash twice, the
remaining doors unlock.
■Using the Remote Transmitter1 Using the Remote Transmitter
If you do not open a door within 30 seconds of
unlocking the vehicle with the remote transmitter,
the doors will automatically relock.
You can change the relock timer setting. 2 Customized Features P. 298
You can lock or unlock the doors using the remote
transmitter only when the power mode is in VEHICLE
OFF.
The remote transmitter us es low-power signals, so
the operating range may vary depending on the
surroundings.
The remote will not lock th e vehicle when a door is
open.
If the distance at which the remote transmitter works
varies, the batter y is probably low.
If the LED does not come on when you press a
button, the battery is dead.
2 Replacing the Button Battery P. 527
You can customize the door unlock mode setting. 2 Customized Features P. 298
LED
Unlock
Button Lock
Button

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.

208
uuAudio System uAudio System Theft Protection
Features
Audio System Theft Protection
The audio system is disabled when it is disconnected from the power source, such as
when the battery is disconnected or goes dead. In certain conditions, the system
may display a code entry screen. If this occurs, reactivate the audio system.
■Reactivating the audio system
1. Set the power mode to ON.
2. Turn on the audio system.
3. Press and hold the audio system power button for more than two seconds.
u The audio system is reac tivated when the audio co ntrol unit establishes a
connection with the vehicle control unit. If the control unit fails to recognize
the audio unit, you must go to a dealer and have the audio unit checked.

525
Maintenance
Battery
Checking the Battery
The condition of the battery is monitored by a
sensor located on the negative terminal of the
battery. If there is a problem with this sensor,
the multi-information display will display a
warning message. If this happens, have your
vehicle inspected by a dealer.
Check the battery termi nals for corrosion
monthly.
To access the battery terminals:
1. Remove the engine compartment cover.
2 Engine Compartment Cover P. 498
2.Remove the clips using a phillips-head scre wdriver, then remove the air intake
duct.
2 High Beam Headlights P. 508
If your vehicle’s battery is disconnected or goes dead:
•The audio system is disabled.
2 Audio System Theft Protection P. 208
•The clock resets.
2 Clock P. 116
1Battery
WARNING: Battery post, terminals,
and related accessories contain lead
and lead compounds.
Wash your hands after handling.
When you find corrosion, cl ean the battery terminals
by applying a baking powder and water solution.
Clean the terminals with a damp towel. Cloth/towel
dry the battery. Coat the terminals with grease to
help prevent future corrosion.
When replacing the battery, the replacement must be
of the same specifications.
Consult a dealer for more information.
3WARNING
The battery gives off explosive hydrogen
gas during normal operation.
A spark or flame can cause the battery to
explode with enough force to kill or
seriously hurt you.
When conducting any battery
maintenance, wear prot ective clothing and
a face shield, or have a skilled technician do
it.
Models without navigation system

537
Handling the Unexpected
This chapter explains how to handle unexpected troubles.
ToolsTypes of Tools .................................. 538
If a Tire Goes Flat Changing a Flat Tire ......................... 539
Engine Does Not Start
Checking the Engine ........................ 549
If the Smart Entry Remote Battery is Weak .......................................... 550
Emergency Engine Stop ................... 551
If the Battery Is Dead ....................... 552
Overheating How to Handle Overheating ............. 555 Indicator, Coming On/Blinking
If the Low Oil Pressure Indicator Comes
On ............................................. 557
If the Charging System Indicator Comes
On ................................................. 557
If the Malfunction Indicator Lamp Comes On or Blinks ................................... 558
If the Brake System I ndicator (Red) Comes
On .................................................559
If the Electric Power Steering (EPS) System
Indicator Comes On ....................... 559
If the Low Tire Pressure/TPMS Indicator Comes On or Blinks........................ 560 If the Transmission System Indicator Blinks
along with the Warning Message... 561
Fuses
Fuse Locations ................................. 562
Inspecting and Changing Fuses ........ 567
Emergency Towing ........................... 568
If You Cannot Unlock the Fuel Fill Door....569
If You Cannot Unlock the Tailgate ... 570
Refueling
Refueling From a Portable Fuel Container ................................... 571