2021 HONDA RIDGELINE battery replacement

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.

487
Maintenance
This chapter discusses basic maintenance.
Before Performing MaintenanceInspection and Maintenance ............ 488
Safety When Performing Maintenance ... 489
Parts and Fluids Used in Maintenance Service ........................................... 490
Maintenance Minder
TM..................... 491
Maintenance Under the Hood Maintenance Items Under the Hood .... 496
Opening the Hood ........................... 497
Engine Compartment Cover ............. 498
Recommended Engine Oil ................ 499
Oil Check ......................................... 500
Adding Engine Oil ............................ 501
Changing the Engine Oil and Oil Filter ...502 Engine Coolant ................................ 504
Transmission Fluid ............................ 506
Brake Fluid ....................................... 507
Refilling Window Wa
sher Fluid......... 507
Replacing Light Bulbs ....................... 508Checking and Maintaining Wiper
Blades .......................................... 514
Checking and Maintaining Tires
Checking Tires ................................. 516
Tire and Loading Information Label ... 517
Tire Labeling .................................... 517
DOT Tire Quality Grading (U.S. Vehicles) .... 519Wear Indicators................................ 521 Tire Service Life ................................ 521
Tire and Wheel Replacement ........... 522
Tire Rotation .................................... 523
Winter Tires ..................................... 524
Battery ............................................... 525
Remote Transmitter Care Replacing the Button Battery ........... 527
Climate Control System Maintenance.......528CleaningInterior Care .................................... 529
Exterior Care.................................... 531
Accessories and Modifications ........ 535

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

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

582
uuWarranty Coverages u
Information
Replacement Battery Limited Warranty – provides prorated coverage for a
replacement battery purchased from your dealer.
Replacement Muffler Life time Limited Warranty – provides coverage for as
long as the purchaser of the muffler owns the vehicle.
Restrictions and exclusions apply to a ll these warranties. Please read the Honda
warranty information booklet that came wi th your vehicle for precise information on
warranty coverages. Your vehi cle’s original tires are covered by their manufacturer.
Tire warranty information is in a separate booklet.
■Statement on Warranty Coverage for Aftermarket and Recycled Parts
The Magnuson-Moss Warranty Act, 15 U.S.C. s.2301 et seq., makes it illegal for
motor vehicle manufacturers to void a motor vehicle warranty or deny warranty
coverage solely because an aftermarket or recycled part has been used to repair the
vehicle or someone other than the authorized service provider performed service on
the vehicle. This provision does not apply to a new motor vehicle purchased solely
for commercial or industrial use.
Under federal law, a manufacturer may deny warranty coverage and charge for repairs
to a vehicle if it is discovered that an aftermarket or recycled part installed on the
vehicle is defective or was in stalled incorrectly and caused damage to another part of
the vehicle otherwise covered under warran ty. The Federal Trade Commission requires
that a manufacturer demonstrate that an aftermarket or recycled part or service
performed by a person other than an authorized service provider caused damage to
another part of the vehicle otherwise covered under warranty before denying
warranty coverage. Additionally, federal law allows a manufacturer to void a motor
vehicle warranty or deny warranty coverage if the manufacturer provides the article or
service to consumers free of charge unde r the warranty or the manufacturer has
secured a waiver from the Federal Trade Commission.

588
Index
Average Fuel Economy............................. 113
B
Battery....................................................... 525
Charging System Indicator ................. 79, 557
If the Battery Is Dead ............................... 552
Maintenance (Checking the Battery) ........ 525
Bed Lights .................................................. 193
Indicator .................................................... 95
Belts (Seat) .................................................. 37
Beverage Holders ...................................... 179
Blind spot information System ................ 420
Indicator .................................................... 92
Bluetooth ® Audio ..................................... 259
Bluetooth ® HandsFreeLink ®................... 329
Booster Seats (For Children) ....................... 73
Brake System ............................................. 468
Anti-lock Brake System (ABS) ................... 470
Brake Assist System ................................. 471
Brake System Indicator............................... 78
Fluid ........................................................ 507
Foot Brake ............................................... 469
Indicator ............................................ 78, 559
Parking Brake .......................................... 468
Brake System Indicator (Amber) ................ 78
Brake System Indicator (Red) ............. 78, 559
Brightness Control (Instrument Panel) .... 160
Bulb Replacement ..................................... 508
Brake/Taillight and Rear Side Marker
Light ...................................................... 512 Daytime Running Light
and Parking
Light...................................................... 510
Front Side Marker Light ........................... 510
Front Turn Signal/Parking Light ................ 511
Headlights ............................................... 508
High-Mount Brake Light .......................... 513
Rear License Plate Light ........................... 513
Rear Turn Signal and Back-Up Light ......... 512
Side Turn Signal/Emergency Indicator Light...................................................... 511
Bulb Specifications ................................... 574
C
Car Wash Mode........................................ 399
Carbon Monoxide Gas ............................... 74
Cargo Hooks ............................................. 194
Carrying Cargo ......................... 365, 367, 370
Certification Label .................................... 576
Changing Bulbs ........................................ 508
Charging System Indicator ................. 79, 557
Child Safety ................................................. 59
Childproof Door Locks............................. 129
Emergency Trunk Opener ........................ 135
Child Seat .................................................... 59
Booster Seats ............................................ 73
Child Seat for Infants................................. 61
Child Seat for Small Children ..................... 62
Installing a Child Seat with a Lap/Shoulder Seat Belt ......................................................... 67 Installing a LATCH-Compatible Child
Seat ........................................................ 64
Larger Children ......................................... 72
Rear-facing Child Seat............................... 61
Selecting a Child Seat ............................... 63
Using a Tether .......................................... 69
Childproof Door Locks ............................. 129
Cleaning the Exterior ............................... 531
Cleaning the Interior ............................... 529
Climate Control System ........................... 195
Changing the Mode................................ 195
Defrosting the Windshield and Windows .............................................. 196
Dust and Pollen Filter .............................. 528
Recirculation and Fresh Air Mode ............ 196
Sensors ................................................... 201
Synchronized Mode ................................ 198
Using Automatic Climate Control............ 195
Clock ......................................................... 116
Coat Hook ................................................ 180
Collision Mitigation Braking System
TM
(CMBSTM) ................................................. 426
Indicator ............................................. 93, 94
Compact Spare Tire .......................... 539, 575
Console Compartment ............................. 178
Controls .................................................... 115
Conversation Mirror ................................ 181
Coolant (Engine) ...................................... 504
Adding to the Radiator ........................... 505
Adding to the Reserve Tank .................... 504
Overheating ............................................ 555

593
Index
Passing Indicators..................................... 149
Playing Bluetooth ® Audio ....................... 259
Power Windows ....................................... 139
Precautions While Driving ....................... 392
Driving Guidelines for Your Utility
Vehicle .................................................. 392
Rain ........................................................ 392
Pregnant Women ....................................... 42
Puncture (Tire) ......................................... 539
R
Radar Sensor............................................ 467
Radiator .................................................... 505
Radio (FM/AM) ......................................... 236
Radio (SiriusXM ®)..................................... 239
Radio Data System (RDS) ......................... 238
Range ........................................................ 114
RDS (Radio Data System) ......................... 238
Readiness Codes (Emissions Testing) ...... 579
Rear Climate Control System ................... 199
From the Rear Panel ................................ 200
Rear Defogger/Heated Door Mirror Button ..................................................... 159
Rear Outer Seat Heaters .......................... 190
Rear Seats ................................................. 169
Rearview Mirror ....................................... 164
Refueling .................................................. 483
Fuel Gauge ............................................. 110
Gasoline ......................................... 483, 574
Low Fuel Indicator..................................... 82 Regulations
............................... 418, 519, 577
Remote Engine Start ................................ 387
Remote Transmitter ................................. 125
Replacement Battery .................................................... 527
Bulbs ....................................................... 508
Fuses ............................... 562, 564, 565, 566
Tires ........................................................ 522
Wiper Blade Rubber ................................. 514
Reporting Safety Defects ......................... 578
RESET Button ............................................ 111
Resetting a Trip Meter ............................. 113
Reverse Tilt Door Mirror .......................... 165
Road Departure Mitigation ..................... 460
Indicator .................................................... 90
On and Off .............................................. 462
S
Safe Driving ................................................ 31
Safety Check ............................................... 36
Safety Labels ............................................... 75
Safety Message ............................................. 2
Seat Belts ..................................................... 37
Adjusting the Shoulder Anchor .................. 41
Automatic Seat Belt Tensioners .................. 39
Checking ................................................... 43
Fastening ................................................... 40
Installing a Child Seat with a Lap/Shoulder Seat Belt.......................................................... 67
Pregnant Women ...................................... 42 Reminder .................................................. 38
Warning Indicator ............................... 38, 81
Seat Heaters .............................. 188, 189, 190
Seat Ventilation ........................................ 189
Seats .......................................................... 166
Adjusting ................................................ 166
Driver’s Seat Lumbar Support .................. 166
Front Seats .............................................. 166
Rear Seats ............................................... 169
Seat Heaters ............................ 188, 189, 190
Seat Ventilation ....................................... 189
Security System ......................................... 136
Immobilizer System Indicator ..................... 86
Security System Alarm Indicator................. 87
Selecting a Child Seat ................................. 63
Sequential Mode ...................................... 401
Sequential Mode Operation .................... 402
Setting the Clock ...................................... 116
Shift Button ........................................ 21, 395
Operation.......................................... 21, 397
Shift Position Indicator ...................... 80, 397
Shifting (Transmission) ....................... 21, 395
Shoulder Anchor ........................................ 41
Side Airbags ................................................ 52
Side Curtain Airbags .................................. 54
Siri Eyes Free ............................................. 268
SiriusXM ® Radio ........................................ 239
Smart Entry System .................................. 120
Smart Entry System Indicator ..................... 88
Snow Tires ................................................. 524
Song By Voice
TM (SBV) .............................. 250