sensor HONDA ODYSSEY 1995 Owners Manual

Supplemental Restraint System

Your car is equipped with a Supple- mental Restraint System (SRS) to
help protect the head and chest of the driver and front seat passenger
during a severe frontal collision.

This system does not replace your seat

belts. It supplements, or adds to, the
protection offered by seat belts and
other occupant protection features.
SRS Components

Your supplemental restraint system
includes:

One airbag in the steering wheelfor the driver and another in thedashboard for the passenger.
Sensors that can detect a severe frontal collision.
A sophisticated electronic system that continually monitors thesensors, control unit, airbag
activators, and all related wiring
when the ignition is ON (II).
An indicator light on the instru- ment panel to alert you to a possi-
ble problem with the system.
Emergency backup power in case your car's electrical system isdisconnected in a crash. What Happens In a Crash
If you ever have a severe frontal
collision, the sensors will detect
rapid deceleration and signal the control unit to instantly inflate the

airbags.

During a crash, your seat belts will
help to restrain your lower body and
torso. The airbags will provide a cushion to absorb crash energy and
help keep the head and chest of thedriver and front passenger fromstriking the interior of the car.
After inflating, the airbags will immediately deflate. The entire
process, from detection to deflation,
takes a fraction of a second. This process occurs so quickly that you
may not hear the loud noise created
by the airbag inflators, or realize
what has happened.
Driver and Passenger Safety

Not wearing a seat belt
increases the chance of serious
injury or death in a crash, even
if you have airbags.
Be sure you and your
passengers always wear seat
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Corrosion Protection

Two factors normally contribute to causing corrosion in your car:
1. Moisture trapped in body cavities. Dirt and road salt that collects in
hollows on the underside of the car stays damp, promoting
corrosion in that area.
2. Removal of paint and protective coatings from the exterior and
underside of the car. Many corrosion-preventive measures
are built into your Honda. You can
help keep your car from corroding
by performing some simple periodic

maintenance:

Repair chips and scratches in the
paint as soon as you discover them.
Inspect and clean out the drain
holes in the bottom of the doors and body.
Check the floor coverings for
dampness. Carpeting and floor
mats may remain damp for a long
time, especially in winter. This dampness can eventually cause
the floor panels to corrode. Use a high-pressure spray to clean
the underside of your car. This is especially important in areas that
use road salt in winter. It is also a
good idea in humid climates and areas subject to salt air. Cars
equipped with ABS have a sensor and wiring at each wheel. Be
careful not to damage them.
Have the corrosion-preventive
coatings on the underside of your
car inspected and repaired
periodically.

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Anti-lock Brake System

The Anti-lock Brake System (ABS) is standard equipment on all U.S.
models and the Canadian six-
passenger model. It is optional on the
Canadian seven-passenger model.

The ABS works by measuring how fast the wheels are turning during

braking and comparing their speed.

If any wheel is rotating much slower
than the others (on the verge of
locking up and skidding), the system reduces hydraulic pressure to that
wheel's brake caliper. When that
wheel's speed matches the other
wheels, the system applies normal hydraulic pressure. This can take
place several times per second ateach wheel. You feel the ABS
working as rapid pulsations in the
brake pedal.
Each wheel has a wheel speed
sensor assembly. As the wheel
rotates, the sensor sends electrical
pulses to the ABS control unit. The
pulse frequency varies with the
wheel speed.
The electrical output of the ABS control unit is connected to the
modulator/solenoid unit. During
braking, the ABS control unit monitors the pulse frequencies from
the four wheels. When the control unit detects a wheel locking up, it
energizes the appropriate solenoid in
the modulator/solenoid unit. Thereare six solenoids: two for each front
wheel, and two for the rear wheels.
The energized solenoid reduces hydraulic pressure to one side of amodulator valve. This, in turn,
reduces hydraulic pressure in the
brake line going to the affected
wheel. When that wheel speeds up because of the reduced braking
effort, the control unit de-energizes the solenoid. This builds hydraulic
pressure on the modulator valve.
The pressure increases in the hydraulic line to the wheel.
For the system to react quickly, the
modulator/solenoid unit must have
brake fluid under high pressure.
This is supplied by a piston-type accumulator that is pressurized by
an electric pump. A pressure-sensingswitch on the accumulator controls
this pump.
The control unit also contains error detection circuitry. It monitors the
operation of the wheel sensors,
solenoids, pump, and electronics. If
the control unit detects any faults, it shuts off power to the pump motor
and solenoids. The light on the
instrument panel comes on. The
brakes then work like a conventional system without anti-lock capabilities.
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Emission Controls

Exhaust Emission Controls
The exhaust emission controls include four systems: PGM-FI,
Ignition Timing Control, ExhaustGas Recirculation and Three Way
Catalytic Converter. These four
systems work together to control the
engine's combustion and minimize
the amount of HC, CO, and NOx that comes out the tailpipe. The exhaust
emission control systems are
separate from the crankcase and
evaporative emission control
systems.

PGM-FI System
The PGM-FI System uses sequential multiport fuel injection.
It has three subsystems: Air Intake,
Engine Control, and Fuel Control.
The Engine Control Module (ECM) uses various sensors to determine
how much air is going into theengine. It then controls how much
fuel to inject under all operating conditions. Ignition Timing Control System
This system constantly adjusts the ignition timing, reducing the amountof HC, CO and NOx produced.
Exhaust Gas Recirculation (EGR)
System

The Exhaust Gas Recirculation (EGR) system takes some of the
exhaust gas and routes it back into
the intake manifold. Adding exhaust
gas to the air/fuel mixture reduces
the amount of NOx produced when
the fuel is burned.
Three Way Catalytic Converter
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 2), dinitrogen
(N 2), and water vapor. Replacement Parts
The emission control systems are designed and certified 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
genuine Honda replacement parts or
their equivalent for repairs. Using
lower quality parts may increase theemissions from your car.
The emissions control systems are covered by warranties separate from
the rest of your car. Read your warranty manual for more informa-
tion.

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