2007 HONDA RIDGELINE engine

The three way catalytic converter
must operate at a high temperature
for the chemical reactions to take
place. It can set on f ire any
combustible materials that come
near it. Park your vehicle away from
high grass, dry leaves, or other
f lammables.A defective three way catalytic
converter contributes to air pollution,
and can impair your engine’s per-
f ormance. Follow these guidelines to
protect your vehicle’s three way
catalytic converter.
Always use unleaded gasoline.
Even a small amount of leaded
gasoline can contaminate the
catalyst metals, making the three
way catalytic converter inef f ective. Keep the engine well maintained.
Have your vehicle diagnosed and
repaired if it is misf iring, back-
f iring, stalling, or otherwise not
running properly.
The three way catalytic converter
contains precious metals that serve
as catalysts, promoting chemical
reactions to convert the exhaust
gasses without af f ecting the metals.
The catalytic converter is ref erred to
as a three-way catalyst, since it acts
on HC, CO, and NOx. A replacement
unit must be an original Honda part
or its equivalent.
Three Way Catalytic Converter
Technical Inf ormation
309
THREE WAY CATALYTIC CONVERTER
WARM UP THREE WAY CATALYTIC
CONVERTERS

If you take your vehicle f or a state
emissions test shortly af ter the
battery has been disconnected or
gone dead, it may not pass the test.
This is because of certain ‘‘readiness
codes’’ that must be set in the on-
board diagnostics f or the emissions
systems. These codes are erased
when the battery is disconnected,
and set again only after several days
of driving under a variety of
conditions.
If the testing f acility determines that
the readiness codes are not set, you
will be requested to return at a later
date to complete the test. If you must
get the vehicle retested within the
next two or three days, you can
condition the vehicle f or retesting by
doing the f ollowing.Make sure the gas tank is nearly,
but not completely, f ull (around
3/4). Without touching the accelerator
pedal, start the engine, and let it
idle f or 20 seconds.
Keep the vehicle in Park. Increase
the engine speed to 2,000 rpm, and
hold it there until the temperature
gauge rises to at least 1/4 of the
scale (about 3 minutes).
Select a nearby lightly traveled
major highway where you can
maintain a speed of 50 to 60 mph
(80to97km/h)foratleast20
minutes. Drive on the highway in
D. Do not use the cruise control.
When traffic allows, drive for 90
seconds without moving theaccelerator pedal. (Vehicle speed
may vary slightly; this is okay.) If
you cannot do this f or a
continuous 90 seconds because of
traf f ic conditions, drive f or at least
30 seconds, then repeat it two
more times (for a total of 90
seconds).
Then drive in city/suburban
traffic for at least 10 minutes.
When traffic conditions allow, let
the vehicle coast f or several
seconds without using the
accelerator pedal or the brake
pedal.
Stop the vehicle, turn of f the
ignition switch, and leave it of f f or
30 minutes.
If the testing f acility determines the
readiness codes are still not set, see
your dealer.
Make sure the vehicle has been
parked with the engine of f f or 6
hours or more.
Make sure the ambient
temperature is between 40° and
95°F.
State Emissions T esting
T esting of Readiness Codes
310

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#
) This manual covers maintenance and recommended
procedures f or repair to engine and chassis components.
It is written f or the journeyman mechanic, but is simple
enough f or most mechanically-inclined owners to under-
stand.
This manual complements the service manual by
providing in-depth troubleshooting inf ormation f or each
electrical circuit in your vehicle.
This manual describes the procedures involved in the
replacement of damaged body parts.
Authorized Manuals
Service Manual:
Electrical T roubleshooting Manual:
Body Repair Manual:
316
NOTE: Dealers and Companies please provide dealer or company name,
and also the name of the person to whose attention the shipment should
be sent. For purchases outside U.S.A. please write to the address shown
below for a quotation.
P.O. BOX 07280·DETROIT, MICHIGAN 48207·1-800-782-4356
Customer Name Attention
Apartment Number
State & Zip Code
City
Daytime Telephone Number
Check or money order enclosed payable to Helm Inc U.S. funds only.
Do not send cash
Master
Card VISA Check here if your billing address is different
from the shipping address shown above.
Account Number Expiration: Mo. Yr.
CUSTOMER SIGNATURE DATE
Street Address No P.O. Box Number
()
These Publications cannot be returned for credit without receiving advance authorization within 14
days of delivery. On returns, a restocking fee may be applied against the original order.

CONT INUED
...
Accessories and Modif ications .184
ACCESSORY (Ignition Key
.......................................
Position) .82
............
Accessory Power Sockets .116
....................
Additives, Engine Oil .247
........
Adjusting the Steering wheel .79
...........................
Advanced Airbags .25
.....................................
Airbag (SRS) .9
..............
Air Conditioning System .122
.........................................
Usage .123
...............
Air Outlets (Vents) . 124, 129
.......................
Air Pressure, Tires .266
......................................
Antif reeze .249
Anti-lock Brakes (ABS)
...............................
Indicator . 63, 208
...................................
Operation .208
..............
Anti-thef t, Audio System .162
.
Anti-thef t Steering Column Lock .82
........................................
Armrests .101
................
Audio System . 133, 142, 159
.....
Auto Door Locking/Unlocking .84
Automatic Heated Wiper
......................................
Zone . 76, 127
...
Automatic Seat Belt Tensioners .19 .............
Automatic Speed Control . 165
..............
Automatic Transmission . 197
..........................
Capacity, Fluid .302
...............
Checking Fluid Level . 251
.......................................
Shif ting .197
Shif t Lever Position ...............................
Indicators .197
................
Shif t Lever Positions . 198
....................
Shif t Lock Release . 202
......................
Auxiliary Input Jack .161
Back Window .......................................
Indicator .69
...................................
Operation .105
Battery Charging System ...........................
Indicator . 62, 288
............................
Jump Starting .284
..............................
Maintenance .270
............................
Specifications . 303
Bed Lights .......................................
Indicator .69
...................................
Operation .120
..............................
Bef ore Driving .177 ....................................
Belts,Seat .8,19
.........................
Beverage Holders .114
..................................
Booster Seats .50
Brakes ...........
Anti-lock System (ABS) . 208
.............
Break-in, New Linings . 178
...........................................
Fluid .253
............
Bulb Replacement . 257, 258
.......................................
Parking .109
.................
System Indicator . 63, 290
........................
Wear Indicators .207
.............................
Braking System .207
.................
Break-in, New Vehicle . 178
..
Brightness Control, Instruments . 78
........................
Brights, Headlights .76
Index
A
B
INDEX
I

ÎÎ
CONT INUED
...................................
Fan, Interior .123
.........................................
Features .121
....................
Filling the Fuel Tank .179
Filters
.........................
Dust and Pollen .262
...............................................
Oil .248
.............
Flashers, Hazard Warning .79
...................
Flat Tire, Changing a .275
..............................
Economy, Fuel .183
..................................
Emergencies .273
.............
Battery, Jump Starting .284
...........
Brake System Indicator .290
................
Changing a Flat Tire .275
.....
Charging System Indicator .288
..................
Checking the Fuses .291
.........
Hazard Warning Flashers .79
.....
Low Oil Pressure Indicator .288
...
Malf unction Indicator Lamp .289
..................
Overheated Engine .286
............................
Stuck Vehicle .297
.......................................
Towing .296
.........................
Emergency Brake .109
.......................
Emissions Controls .307
Engine
....
Coolant Temperature Gauge .72
Malf unction Indicator
................................
Lamp . 62, 289
.........................
Oil Lif e Display .235
........
Oil Pressure Indicator . 62, 288 ..............
Oil, What Kind to Use .246
...............................
Overheating .286
............................
Specif ications .303
............................
Speed Limiter .201
.......................................
Starting .196
.................
Engine, if it won’t start .283
Evaporative Emissions Control
........................................
System .307
...............................
Exhaust Fumes .53
Exhaust Gas Recirculation
........................................
System .308
Expectant Mothers, Use of Seat ........................................
Belts by .16
................
Daytime Running Lights .78
.................................
Dead Battery .284
.........
Def ects, Reporting Saf ety .314
..............
Def rosting the Windows .127
................
Dif f erential Fluid, Rear .252
....................................
Dimensions .302
...............
Dimming the Headlights .76
Dipstick
..........
Automatic Transmission .251
..................................
Engine Oil .182
..........................
Directional Signals .76
........
Disc Brake Wear Indicators .207
.....................
Disposal of Used Oil .248
.
Door and Tailgate Open Monitor .64
Doors
..
Locking and Unlocking . 83, 84, 86
....................
Lockout Prevention .83
......................
Power Door Locks .83
........
DOT Tire Quality Grading .304
...........
Driver and Passenger Safety .5
...........................................
Driving .193
....................................
Economy .183
...................................................
D3 .199
Dual-Action Tailgate
.................................
Indicator . 64, 94
.....................................
Operation .92 ..........
Dual Temperature Control .130
..................
Dust and Pollen Filter .262
Index
E
F
INDEX
III

ÎÎ
...
Identif ication Number, Vehicle .300
...............
Gas Mileage, Improving .183
Gasoline
...............
Fuel Reserve Indicator .65
...........................................
Gauge .71
................
Octane Requirement .178
........................
Tank, Filling the .179
................
Gas Station Procedures .179
Gauges
...
Engine Coolant Temperature .72
...............................................
Fuel .71
...............................
Speedometer .70
.................................
Tachometer .70
GAWR (Gross Axle Weight .......................................
Rating) .213
GCWR (Gross Combined Weight .......................................
Rating) .213
............
Gearshif t Lever Positions .198
......................................
Glove Box .115
GVWR (Gross Vehicle Weight
.......................................
Rating) .213
.....................................
Floor Mats .261
Fluids
..........
Automatic Transmission .251
..........................................
Brake .253
..........................
Power Steering .254
.......................
Rear Differential .252
...................
Transf er Assembly .253
..................
Windshield Washer .250
FM Stereo Radio ...................................
Reception .140
.................
Folding the Rear Seats .103
..........................
Four-way Flashers .79
........................................
Front Seat .98
..............................
Adjusting . 98, 100
.........................................
Airbags .23
.......................................
Heaters .104
.................................................
Fuel .178
......................
Fill Door and Cap .179
...........................................
Gauge .71
................
Octane Requirement .178
...............................
Oxygenated .178
........................
Reserve Indicator .65
........................
Tank, Filling the .179
.....................
Fuses, Checking the .291
.............
Halogen Headlight Bulbs . 255..............
Hazard Warning Flashers . 79
.................................
Headlights . 75, 76
........................................
Aiming .255
..............
Automatic Lighting Off . 77
.................................
Control Dial .76
.......
Daytime Running Lights . 78
..................
High Beam Indicator . 65
.....
High Beams, Turning on . 75, 76
............
Low Beams, Turning on . 76
.........................
Reminder Chime .77
........
Replacing Halogen Bulbs . 255
..................................
Turning On .76
............................
Head Restraints .102
.............................
Heated Mirrors .111
...............................
Heaters, Seats .104
.....................
Heating and Cooling .123
.................
High-Low Beam Switch . 75
HomeLink Universal ................................
Transceiver .171
.......................
Hood, Opening the .181
..................................................
Horn .74
Index
G
H I
IV

ÎÎ
CONT INUED
..................................................
Keys .80
.......................
Label, Certif ication .300
.................
Lane Change, Signaling . 76
..................
Lap/Shoulder Belts . 14, 19
...........................
Light Control Dial .76
Ignition
..............................................
Keys .80
...........................................
Switch .82
............
Timing Control System . 308
........................
Immobilizer System .81
.........
Important Safety Precautions . 6
...................................
In-Bed Trunk .95
....................
Emergency Opener .96
............................
Open Indicator .69
.........
Indicators, Instrument Panel . 59
...............
ABS (Anti-lock Brake) . 63
.......................
A/T Temperature .66
....................
Back Window Open . 69
.............................
Bed Lights On .69
Brake (Parking and Brake ....................................
System) .63
........................
Charging System .62
.............................
Cruise Control .65
...................................
Door Open .64
DRL (Daytime Running ..................................
Lights) .65
...................................
High Beam .65
....................
In-Bed Trunk Open .69
........
Key (Immobilizer System) . 63
.....................................
Lights On .66
......................................
Low Fuel .65 ........................
Low Oil Pressure .62
......................
Low Tire Pressure .68
..................
Maintenance Minder . 67
Malf unction Indicator Lamp .......................................
(MIL) .62
...........................
Side Airbag Of f .62
.......................................
Seat Belt .61
...............................................
SRS .62
..............................
Tailgate Open .64
...............
Tire Pressure Monitor . 68
.............................
TPMS System .68
Turn Signal and Hazard ...................................
Warning .64
............................
VSA Activation .67
.................................
VSA System .67
..........................................
VTM-4 .66
..............................
Washer Level .65
..................
Individual Map Lights . 119
...............................
Inf ant Restraint .37
......................................
Inf ant Seats .37
...................
Inf lation, Proper Tire . 266
........................
Inf ormation Display .70
.........
Engine Oil Lif e Indicator . 235
...........
Mainte nance Items . 238, 242
.................................
Inside Mirror .110
.............................
Inspection, Tire .266 ........................
Instrument Panel . 3, 58
........
Instrument Panel Brightness . 78
...............................
Interior Lights .118
........................................
Introduction .i
................
Jacking Up the Vehicle . 277
.......................................
Jack, Tire .275
................................
Jump Starting .284
Index
J
L K
INDEX
V

..................................
Maintenance .233
Owner’s Maintenance ...................................
Checks .241 .................................
Record . 243-244
................................
Minder . 235-242
.........................
Minder Indicator .67
..........................................
Saf ety .234
.
Malfunction Indicator Lamp . 62, 289
..............
Manual Seat Adjustments . 98
...............................
Meters, Gauges .70
........................
Mirrors, Adjusting .111
...............
Modif ying Your Vehicle . 185
.......................................
Moonroof .108
...
Octane Requirement, Gasoline . 178
.........................................
Odometer .70
....................
Of f -Highway Driving . 227
...................
Of f -Road Precautions . 228
Oil ........................
Change, How to .247 ......................
Change, When to .235
......................
Checking Engine .182
...........................................
Filter .247
..............
Pressure Indicator . 62, 288
Selecting Proper Viscosity ......................................
Chart .246
...........
ON (Ignition Key Position) . 82
............................
Outside Mirrors .111
....................
Overheating, Engine .286
....
Owner’s Maintenance Checks . 241
.........................
Oxygenated Fuels .178
..............
Panel Brightness Control . 78
........................
Park Gear Position .198
...........................................
Parking .206
...............................
Parking Brake .109
.................................
Parking Lights .76
..
Parking Over Things that Burn . 309
.............................
PGM-FI System .308
Pickup Bed .........................
Carrying Cargo .189
.........................................
Lights .120
..............
Power Seat Adjustments . 100
...............
Power Socket Locations . 116
Lights
....................
Bulb Replacement .255
.......................................
Indicator .66
.......................................
Interior .118
.........................................
Parking .76
..................................
Turn Signal .76
............................
Load Limits .187, 212
......
LOCK (Ignition Key Position) . 82
Locks .......
Anti-thef t Steering Column . 82
............................
Fuel Fill Door .179
..................................
Glove Box .115
...............................
In-Bed Trunk .95
....................
Lockout Prevention . 83
.................................
Power Door .83
........................
Low Coolant Level .182
.........................
Low Fuel Indicator .65
...
Low Oil Pressure Indicator . 62, 288
...
Lubricant Specif ications Chart . 302
...........
Luggage, Storing (Cargo) . 186...................
Neutral Gear Position . 199
..................
New Vehicle Break-in . 178
...................
NOTICE, Explanation of . i
...............
Numbers, Identif ication . 300
Index
N
O P
M
VI