2000 TOYOTA CAMRY CNG Owners Manual

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11 32000 CAMRY CNG (OM33519U)
1. Fuel tank
2. Manual shutoff valve
Have the fuel system checked and main-
tained by your authorized Toyota CNG
dealer.
—Fuel tank
The fuel tank on your vehicle conforms
to ANSI/AGA NGV−2, NFPA−52 and DOT
NHTSA FMVSS 304 safety standards.
Removal, servicing, discharge of fuel
and disposal of the tank should only be
done by a qualified technician as pre-
scribed by the fuel control regulation of
NFPA−52, and all applicable federal,
state and local regulations.
Have the fuel tank inspected at the
interval listed in the “Scheduled
Maintenance Guide”. The fuel tank also
requires inspection if the vehicle is
involved in a collision or fire hazard.
Warning labels on the fuel tank and the
engine compartment indicate the ser-
vice limit date of the tank. Do not re-
move or paint over the labels.
See instructions on fuel
container for inspection
and service life.
CAUTION
This tank contains high pressure
flammable natural gas. You must
ensure that the tank is checked and
inspected and properly maintained,
as well as avoid overfilling or dril-
ling holes in it, or damaging it in
any other way because death or se-
rious injury may result.
Do not allow any person other than
a qualified technician to remove
this tank from the vehicle. If residu-
al gas in the tank is not discharged
correctly, static electricity may be
ignited, causing fire or explosion.
Do not leave the fuel tank where
the temperature can exceed 80C
(176F). The tank’s built−in pressure
relief device may open and release
all the fuel from under the floor.
Fuel system—
—Components

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NOTICE
Do not damage the tank. If the tank
is damaged, have it inspected by
your authorized Toyota CNG dealer
as soon as possible.
Do not expose the tank to chlorine,
oxygen or other corrosive liquids.
This tank is intended for use with
compressed natural gas—the fuel
for this vehicle. Do not use it for
any other purpose.
SERVICE PRESSURE:
24800 kPa (3600 psig)
Equivalent gasoline capacity:
43 L (11.4 gal., 9.5 lmp.gal.)
Water volume:
135 L (35.7 gal., 29.7 lmp.gal.)
—Fuel shut off system
If the engine stalls, fuel flow from the tank
is automatically shut off. When restarting
the engine after fuel flow is shut off, turn
the ignition switch to “ACC” or “LOCK”
once and then start it. The fuel flow from
the tank will also be shut off automatically
when an airbag inflates upon collision or
if the piping is disconnected.
CAUTION
If the vehicle is involved in a colli-
sion and there is a chance that there
may be fuel leakage, never restart the
engine. Ignition of leaked natural gas
may cause death or serious injury.
Manual shutoff valve
This valve is for manually shutting off
fuel from the tank. It is usually left
open. Use this valve to shut off fuel if
you suspect that the fuel is leaking or
after you have been involved in a colli-
sion.
Refer to “If you suspect the fuel is
leaking” in Section 4 for how to operate
the valve.
Operation in foreign countries
If you plan to drive your Toyota in
another country...
First, comply with the vehicle registration
laws.
Second, confirm the availability of the cor-
rect fuel and filling nozzles.

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Three−way catalytic converter
The three−way catalytic converter is an
emission control device installed in the
exhaust system.
The purpose is to reduce pollutants in the
exhaust gas.
CAUTION
Keep people and combustible mate-
rials away from the exhaust pipe
while the engine is running. The
exhaust gas is very hot.
Do not drive, idle or park your ve-
hicle over anything that might burn
easily such as grass, leaves, paper
or rags.
NOTICE
A large amount of unburned gases
flowing into the three−way catalytic
converter may cause it to overheat
and create a fire hazard. To prevent
this and other damage, observe the
following precautions:
Use only CNG (Compressed Natural
Gas).
Do not drive with an extremely low
fuel level; running out of fuel could
cause the engine to misfire, creat-
ing an excessive load on the three−
way catalytic converter.
Do not allow the engine to run at
idle speed for more than 20 min-
utes.
Avoid racing the engine.
Do not push−start or pull−start your
vehicle.
Do not turn off the ignition while
the vehicle is moving.

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Keep your engine in good running
order. Malfunctions in the engine
electrical system, electronic ignition
system/distributor ignition system
or fuel system could cause an ex-
tremely high three−way catalytic
converter temperature.
If the engine becomes difficult to
start or stalls frequently, take your
vehicle in for a check−up as soon
as possible. Remember, your autho-
rized Toyota CNG dealer knows
your vehicle and its three−way cata-
lytic converter system best.
To ensure that the three−way cata-
lytic converter and the entire emis-
sion control system operate proper-
ly, your vehicle must receive the
periodic inspections required by the
Toyota Maintenance Schedule. For
scheduled maintenance information,
refer to the “Owner ’s Manual Sup-
plement”.
Engine exhaust cautions
CAUTION
Avoid inhaling the engine exhaust.
It contains carbon monoxide, which
is a colorless and odorless gas. It
can cause unconsciousness or even
death.
Make sure the exhaust system has
no holes or loose connections. The
system should be checked from
time to time. If you hit something,
or notice a change in the sound of
the exhaust, have the system
checked immediately.
Do not run the engine in a garage
or enclosed area except for the
time needed to drive the vehicle in
or out. The exhaust gases cannot
escape, making this a particularly
dangerous situation.
Do not remain for a long time in a
parked vehicle with the engine run-
ning. If it is unavoidable, however,
do so only in an unconfined area
and adjust the heating or cooling
system to force outside air into the
vehicle.
Keep the trunk lid closed while
driving. An open or unsealed trunk
lid may cause exhaust gases to be
drawn into the vehicle.
To allow proper operation of your
vehicle’s ventilation system, keep
the inlet grilles in front of the wind-
shield clear of snow, leaves, or oth-
er obstructions.
If you smell exhaust fumes in the
vehicle, drive with the windows
open and the trunk lid closed. Have
the cause immediately located and
corrected.

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FUNCTIONS OF ENGINE OIL
Engine oil has the primary functions of
lubricating and cooling the inside of the
engine, and plays a major role in main-
taining the engine in proper working order.
ENGINE OIL CONSUMPTION
It is normal that an engine should con-
sume some engine oil during normal
engine operation. The causes of oil
consumption in a normal engine are as
follows.
Oil is used to lubricate pistons, piston
rings and cylinders. A thin film of oil
is left on the cylinder wall when a pis-
ton moves downwards in the cylinder.
High negative pressure generated when
the vehicle is decelerating sucks some
of this oil into the combustion chamber.
This oil as well as some part of the oil
film left on the cylinder wall is burned
by the high temperature combustion
gases during the combustion process.
Oil is also used to lubricate the stems
of the intake valves. Some of this oil
is sucked into the combustion chamber
together with the intake air and is
burned along with the fuel. High tem-
perature exhaust gases also burn the
oil used to lubricate the exhaust valve
stems.
The amount of engine oil consumed de-
pends on the viscosity of the oil, the
quality of the oil and the conditions the
vehicle is driven under.
More oil is consumed by high−speed driv-
ing and frequent acceleration and decel-
eration.
A new engine consumes more oil, since
its pistons, piston rings and cylinder walls
have not become conditioned.
When judging the amount of oil con-
sumption, note that the oil may become
diluted and make it difficult to judge
the true level accurately.
As an example, if a vehicle is used for
repeated short trips, and consumes a nor-
mal amount of oil, the dipstick may not
show any drop in the oil level at all, even
after 1000 km (600 miles) or more. This
is because the oil is gradually becoming
diluted with fuel or moisture, making it
appear that the oil level has not changed.The diluting ingredients evaporate out
when the vehicle is then driven at high
speeds, as on an express way, making it
appear that oil is excessively consumed
after driving at high speeds.
IMPORTANCE OF ENGINE OIL LEVEL
CHECK
One of the most important points in prop-
er vehicle maintenance is to keep the en-
gine oil at the optimum level so that oil
function will not be impaired. Therefore, it
is essential that the oil level be checked
regularly. Toyota recommends that the oil
level be checked every time you refuel
the vehicle.
NOTICE
Failure to check the oil level regularly
could lead to serious engine trouble
due to insufficient oil.
For detailed information on oil level check,
see “Checking the engine oil level” in Sec-
tion 7−2.
Facts about engine oil
consumption

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Your engine is fitted with twin ground
electrode platinum−tipped spark plugs.
NOTICE
For your engine performance, use
only twin ground electrode platinum−
tipped spark plugs specially designed
for CNG vehicles and do not adjust
gaps. Spark plugs for gasoline−en-
gined vehicles cannot be used for
your vehicle.
Brake system
The tandem master cylinder brake system
is a hydraulic system with two separate
sub−systems. If either sub−system should
fail, the other will still work. However, the
pedal will be harder to press, and your
stopping distance will be longer. Also, the
brake system warning light may come on.
CAUTION
Do not drive your vehicle with only a
single brake system. Have your
brakes fixed immediately.
BRAKE BOOSTER
The brake booster uses engine vacuum to
power−assist the brakes. If the engine
should quit while you are driving, you can
bring the vehicle to a stop with normal
pedal pressure. There is enough reserved
vacuum for one or two stops—but no
more!
CAUTION
Do not pump the brake pedal if the
engine stalls. Each push on the
pedal uses up your reserved vacu-
um.
Even if the power assist is com-
pletely lost, the brakes will still
work. But you will have to push the
pedal hard, much harder than nor-
mal. And your braking distance will
be longer.
ANTI−LOCK BRAKE SYSTEM
The anti−lock brake system is designed
to help prevent lock−up of the wheels
during a sudden braking or braking on
slippery road surfaces. This assists in
providing stability and steering perfor-
mance of the vehicle under these cir-
cumstances.
Twin ground electrode
platinum−tipped spark plugs

’00CAMRY CNG (L/O9908)
11 92000 CAMRY CNG (OM33519U)
Effective way to press the ABS brake
pedal:
When the anti−lock brake system func-
tion is in action, just hold the brake
pedal down more firmly. Especially, in a
panic stop, you need to keep it de-
pressed more firmly, and do not pump
the brake. Pumping the brake pedal
makes the stopping distance longer.
The anti−lock brake system becomes op-
erative after the vehicle has accelerated
to a speed in excess of approximately 10
km/h (6 mph). It stops operating when the
vehicle decelerates to a speed below
approximately 5 km/h (3 mph).
Depressing the brake pedal on slippery
road surfaces such as on the manhole
cover, the steel plate under the construc-
tion, joints in the bridge, etc. on a rainy
day tends to activate the anti−lock brake
system.
You may hear a click or motor sound in
the engine compartment for a few seconds
when the engine is started or just after
the vehicle is started. This means that the
anti−lock brake system is in the self−
check mode, and does not indicate a mal-
function.When the anti−lock brake system is ac-
tivated, the following conditions may
occur, however, do not indicate a mal-
function of the system:
You may hear the anti−lock brake sys-
tem operating and feel the brake pedal
pulsating and the vibrations of the ve-
hicle body and steering wheel. You
may also hear the motor sound in the
engine compartment even after the ve-
hicle is stopped.
At the end of the anti−lock brake sys-
tem activation, the brake pedal may
move a little to the forward.
CAUTION
Do not overestimate the anti−lock
brake system: Although the anti−lock
brake system assists in providing ve-
hicle control, it is still important to
drive with all due care and maintain
a moderate speed and safe distance
from the vehicle in front of you, be-
cause there are limits to the vehicle
stability and effectiveness of steering
wheel operation even with the anti−
lock brake system on.
If tires grip performance exceeds its
capability, or if hydroplaning occurs
during high speed driving in the rain,
the anti−lock brake system does not
provide vehicle control.

’00CAMRY CNG (L/O9908)
1202000 CAMRY CNG (OM33519U)
Anti−lock brake system is not de-
signed to shorten the stopping dis-
tance: Always drive at the moderate
speed and maintain a safe distance
from the vehicle in front of you.
Compared with vehicles not fitted
with an anti−lock brake system, your
vehicle may require a longer stopping
distance in the following cases:
Driving on rough, gravel or snow−
covered roads.
Driving with tire chains installed.
Driving over the steps such as the
joints on the road.
Driving on roads where the road
surface is pitted or has other differ-
ences in surface height.
Install all 4 tires of specified size at
designated pressure: The anti−lock
brake system detects vehicle speeds
using the speed sensors for respec-
tive wheels’ turning speeds. The use
of tires other than specified may fail
to detect the accurate turning speed,
resulting in a longer stopping dis-
tance.
“ABS” warning light
The light comes on when the ignition key
is turned to the “ON” position. If the anti−
lock brake system works properly, the
light goes out after a few seconds. There-
after, if the system malfunctions, the light
comes on.
When the “ABS” warning light is on (and
the brake system warning light is off), the
anti−lock brake system does not operate,
but the brake system still operates con-
ventionally.When the “ABS” warning light is on (and
the brake system warning light is off), the
anti−lock brake system does not operate
so that the wheels could lock up during
a sudden braking or braking on slippery
road surfaces.
If the following conditions occur, this
indicates a malfunction somewhere in
the parts monitored by the warning
light system. Contact your authorized
Toyota CNG dealer as soon as possible
to service the vehicle.
The light does not come on with the
ignition key turned to “ON”, or remains
on.
The light comes on while driving.
If the light lit during driving goes out and
does not come on again, it is a normal
operation.