EGR HONDA PILOT 2007 1.G Owners Manual

To eliminate potential hazards, read
the instructions bef ore you begin,
and make sure you have the tools
and skills required.To clean parts, use a commercially
available degreaser or parts
cleaner, not gasoline.
To reduce the possibility of f ire or
explosion, keep cigarettes, sparks,
and flames away from the battery
and all f uel-related parts.
Wear eye protection and
protective clothing when working with the battery or compressed air. Do
not run the engine unless
instructed to do so.
Some of the most important saf ety
precautions are given here. However,
we cannot warn you of every
conceivable hazard that can arise in
perf orming maintenance. Only you
can decide whether or not you
should perf orm a given task.
All service items not detailed in this
section should be perf ormed by a
certif ied technician or qualif ied
mechanic.
Make sure your vehicle is parked
on level ground, the parking brake
is set, and the engine is of f . Be sure there is
adequate ventilation whenever you
operate the engine.
Let the
engine and exhaust system cool
down bef ore touching any parts.
Maintenance Saf ety
Important Saf ety Precautions Injury f rom moving parts.
Potential Vehicle Hazards Carbon Monoxide poison f rom
engine exhaust.
Burns f rom hot parts.
228
Failure to properly follow
maintenance instructions and
precautions can cause you to
be seriously hurt or killed.
Always follow the procedures
and precautions in this owner’s
manual.
Improperly maintaining this
vehicle or failing to correct a
problem before driving can
cause a crash in which you can
be seriously hurt or killed.
Always follow the inspection,
maintenance recommendations,
and schedules in this owner’s
manual.

Thediagramsinthissectiongive
you the dimensions and capacities of
your vehicle and the locations of the
identif ication numbers. It also
includes inf ormation you should
know about your vehicle’s tires and
emissions control systems.................
Identif ication Numbers .286
................................
Specif ications .288
..........
DOT Tire Quality Grading .290
Unif orm Tire Quality ..................................
Grading .290
.................................
Treadwear .290
......................................
Traction .290
.............................
Temperature .291
.................................
Tire Labeling .291
Tire Pressure Monitoring
System (TPMS)-Required .............
Federal Explanation .293 .......................
Emissions Controls .295
.....................
The Clean Air Act .295
Crankcase Emissions Control
....................................
System .295
Evaporative Emissions Control ....................................
System .295
Onboard Ref ueling Vapor ................................
Recovery .295
...
Exhaust Emissions Controls .296
....................
PGM-FI System .296
Ignition Timing Control
................................
System .296
Exhaust Gas Recirculation ...................
(EGR) System .296
Three Way Catalytic ...........................
Converter .296
....................
Replacement Parts .296
..
Three Way Catalytic Converter .297
..............
State Emissions Testing .298
....
Testing of Readiness Codes .298
T echnical Inf ormation
Technical Inf ormation
285

The exhaust emissions controls
include f our systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These f our systems work
together to control the engine’s
combustion and minimize the
amount of HC, CO, and NOx that
come out the tailpipe. The exhaust
emissions control systems are
separate f rom the crankcase and
evaporative emissions control
systems.
The PGM-FI system uses sequential
multiport f uel injection.
It has three subsystems: air intake,
engine control, and f uel control. The
powertrain control module (PCM)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
f uel to inject under all operating
conditions.The emissions control systems are
designed and certif ied to work to-
gether in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Honda replacement parts or their
equivalent f or repairs. Using lower
qualitypartsmayincreasethe
emissions f rom your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more informa-
tion.
The three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine’s exhaust
to carbon dioxide (CO ), nitrogen
(N ), and water vapor. This system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.
The exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manif old. Adding exhaust gas to the
air/f uel mixture reduces the amount
of NOx produced when the f uel is
burned.
2
2
Exhaust Emissions Controls Replacement Parts
PGM-FI Syst emT hree Way Cat alyt ic Convert er
Ignit ion T iming Cont rol Syst em
Exhaust Gas Recirculat ion (EGR)Syst em
Emissions Cont rols
296