2000 TOYOTA CAMRY engine mount

FUEL SYSTEM
1. When disconnecting the high pressure fuel line, a
large amount of gasoline will spill out, so observe the
following procedures:
(a) Put a container under the connection.
(b) Slowly loosen the connection.
(c) Disconnect the connection.
(d) Plug the connection with a rubber plug.
2. When connecting the flare nut or union bolt on the
high pressure pipe union, observe the following proce±
dures:
Union Bolt Type:
(a) Always use a new gasket.
(b) Tighten the union bolt by hand.
(c) Tighten the union bolt to the specified torque.
Torque: 29 N±m (300 kgf±cm, 22 ft±lbf)
Flare Nut Type:
(s) Apply alight coat of engine oil to the flare and tighten
the flare nut by hand.
(b) Using SST, torque the flare nut.
SST 09631±22020
Torque:
28 N±m (285 kgf±cm, 21 ft±lbf) for fuel pump side
30 N±m (310 kgf±cm, 22 ft±lbf) for others
HINT: Use a torque wrench with a fulcrum length of
30 cm (11.81 in.).
3. Observe the following precautions when removing
and installing the injectors.
(a) Never reuse the O±ring.
(b) When placing a new O±ring on the injector, take care
not to damage it in any way.
(c) Coat a new 0± ring with spindle oil or gasoline before
installing±never use engine, gear or brake oil.
4. Install the injector to delivery pipe and intake manifold
as shown in the illustration.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±175

The cooling system is composed of the water jacket (inside the cylinder block and cylinder head),
radiator, water pump, thermostat, electric fan, hoses and other components.
Engine coolant which is heated in the water jacket is pumped to the radiator, through which an
electric fan blows air to cool the coolant as it passes through. Engine coolant which has been
cooled is then sent back to the engine by the water pump, where it cools the engine.
The water jacket is a network of channels in the shell of the cylinder block and cylinder head
through which coolant passes. It is designed to provide adequate cooling of the cylinders and
combustion chambers which become heated during engine operation.
DESCRIPTION
This engine utilizes a pressurized forced circulation cooling system which includes a thermostat
equipped with a bypass valve mounted on the inlet side.
OPERATIONCOOLING SYSTEM
± 5S±FE ENGINECOOLING SYSTEMEG1±238

RADIATOR
The radiator performs the function of cooling the coolant which has passed through the water
jacket and become hot, and it is mounted in the front of the vehicle. The radiator consists of an
upper tank and lower tank, and a core which connects the two tanks. The upper tank contains the
inlet for coolant from the water jacket and the filler inlet. It also has a hose attached through
which excess coolant or steam can flow. The lower tank has an outlet and drain cock for the
coolant. The core contains many tubes through which coolant flows from the upper tank to the
lower tank as well as to cooling fins which radiate heat away from the coolant in the tubes. The
air sucked through the radiator by the electric fan, as well as the wind generated by the vehicle's
travel, passes through the radiator, cooling the coolant. Models with automatic transmission
include an automatic transmission fluid cooler built into the lower tank of the radiator. A fan with
an electric motor is mounted behind the radiator to assist the flow of air through the radiator. The
fan operates when the engine coolant temperature becomes high in order to prevent it from be-
coming too high.
RADIATOR CAP
The radiator cap is a pressure type cap which seals the radiator, resulting in pressurization of the
radiator as the coolant expands. The pressurization prevents the coolant from boiling even when
the engine coolant temperature exceeds 100°C (212°F). A relief valve (pressurization valve) and a
vacuum valve (negative pressure valve) are built into the radiator cap. The relief valve opens and
lets steam escape through the overflow pipe when the pressure generated inside the cooling sys-
tem exceeds the limit (coolant temperature: 110±120°C (230±248°F), pressure; 58.8103.0 kpa
(0.6±1.05 kgf/cm
2, 8.5±14.9 psi). The vacuum valve opens to alleviate the vacuum which develops
in the cooling system after the engine is stopped and the engine coolant temperature drops. The
valve's opening allows the coolant in the reservoir tank to return to the cooling system.
RESERVOIR TANK
The reservoir tank is used to catch coolant which overflows from the cooling system as a result
of volumetric expansion when the coolant is heated. The coolant in the reservoir tank returns to
the radiator when the coolant temperature drops, thus keeping the radiator full at all times and
avoiding needless coolant loss.
Check the reservoir tank level to learn if the coolant needs to be replenished.
WATER PUMP
The water pump is used for forced circulation of coolant through the cooling system. It is
mounted on the front of the cylinder block and driven by a timing belt.
THERMOSTAT
The thermostat has a wax type bypass valve and is mounted in the water inlet housing. The
thermostat includes a type of automatic valve operated by fluctuations in the engine coolant
temperature. This valve closes when the engine coolant temperature drops, preventing the
circulation of coolant through the engine and thus permitting the engine to warm up rapidly. The
valve opens when the engine coolant temperature has risen, allowing the circulation of coolant.
Wax inside the thermostat expands when heated and contracts when cooled. Heating the wax
thus generates pressure which overpowers the force of the spring which keeps the valve closed,
thus opening the valve. When the wax cools, its contraction allows the force of the spring to take
effect once more, closing the valve. The thermostat in this engine operates at a temperature of
82
C (180
F).
± 5S±FE ENGINECOOLING SYSTEMEG1±239

7. CHECK ENGINE OIL LEVEL
The oil level should be between the ªLº and ªFº marks
on the dipstick.
If low, check for leakage and add oil up to ªFº mark. (c) Tighten the oil filter by hand until the rubber gasket
contacts the seat of the filter mounting. Then using
SST, give it an additional 3/4 turn to seat the oil filter.
SST 09228±06500
4. FILL WITH ENGINE OIL
5. FILL WITH ENGINE COOLANT (SEE PAGE EG1±241)
6. START ENGINE AND CHECK FOR LEAKS 3. INSTALL OIL FILTER
(a) Clean the oil filter contact surface on the filter
mounting.
(b) Lubricate the filter rubber gasket with engine oil.
± 5S±FE ENGINECOOLING SYSTEMEG1±249

(d) Inspect for water leaks.
HINT: On radiators with resin tanks, there is a clear±
ance between the tank and lock plate where a minute
amount of air will remain, giving the appearance of an
air leak when the radiator is submerged in water.
Therefore, before performing the water leak test, first
switch the radiator around in the water until all air
bubbles disappear.
7. PAINT LOCK PLATES
HINT: If the water leak test checks out okay, allow the
radiator to completely dry and then paint the lock
plates.
RADIATOR INSTALLATION
(See Components for Removal and installation)
1. INSTALL ENGINE COOLANT TEMPERATURE
SWITCH
(a) Install a new O±ring to the engine coolant tempera±
ture switch.
(b) Install the engine coolant temperature switch.
2. INSTALL ELECTRIC COOLING FANS TO RADIATOR
Install the cooling fans with the 8 bolts.
3. INSTALL ENGINE COOLANT TEMPERATURE
SWITCH WIRE
± 5S±FE ENGINECOOLING SYSTEMEG1±258

A pressure feeding lubrication system has been adopted to supply oil to the moving parts of this
engine. The lubrication system consists of an oil pan, oil pump, oil filter and other external parts
which supply oil to the moving parts in the engine block. The oil circuit is shown in the illustration
at the top of the previous page. Oil from the oil pan is pumped up by the oil pump. After it passes
through the oil filter, it is through the various oil holes in the crankshaft and cylinder block. After
passing through the cylinder block and performing its lubricating function, the oil is returned by
gravity to the oil pan. A dipstick on the center left side of the cylinder block is provided to check
the oil level.
OIL PUMP
The oil pump pumps up oil from the oil pan and feeds it under pressure to the various parts of the
engine. An oil strainer is mounted in front of the inlet to the oil pump to remove impurities. The
oil pump itself is a trochoid type pump, inside of which is a drive rotor and a driven rotor. When
the drive rotor rotates, the driven rotor rotates in the same direction, and since the axis of the
drive rotor shaft is different from the center of the driven rotor, the space between the two rotors
changes as they rotate. Oil is drawn in when the space widens and is discharged when the space
becomes narrow.
OIL PRESSURE REGULATOR (RELIEF VALVE)
At high engine speeds, the engine oil supplied by the oil pump exceeds the capacity of the engine
to utilize it. For that reason, the oil pressure regulator works to prevent an oversupply of oil.
During normal oil supply, a coil spring and valve keep the bypass closed, but when too much oil
is being fed, the pressure becomes extremely high, overpowering the force of the spring and
opening the valves. This allows the excess oil to flow through the valve and return to the oil pan.
OIL FILTER
The oil filter is a full flow type filter with a relief valve built into the paper filter element. Particles
of metal from wear, airborne dirt, carbon and other impurities can get into the oil during use and
could cause accelerated wear or seizing if allowed to circulate through the engine. The oil filter,
integrated into the oil line, removes these impurities as the oil passes through it. The filter is
mounted outside the engine to simplify replacement of the filter element. A relief valve is also
included ahead of the filter element to relieve the high oil pressure in case the filter element
becomes clogged with impurities. The relief valve opens when the oil pressure overpowers the
force of the spring. Oil passing through the relief valve bypasses the oil filter and flows directly
into the main oil hole in the engine.
± 5S±FE ENGINELUBRICATION SYSTEMEG1±269

(c) Tighten the oil filter by hand until the rubber gasket
contacts the seat of the filler mounting. Then using
SST, give it an additional 3/4 turn to seat the oil filter.
SST 09228±06500
4. FILL WITH ENGINE COOLANT
(See page EG1±241)
5. START ENGINE AND CHECK FOR LEAKS
6. CHECK ENGINE OIL LEVEL 3. INSTALL OIL FILTER
(a) Clean the oil filter contact surface on the filter
mounting. 2. CONNECT WATER BYPASS HOSES
Connect the 2 water bypass hoses.
(b) Lubricate the filter rubber gasket with engine oil.
± 5S±FE ENGINELUBRICATION SYSTEMEG1±288

CIRCUIT DESCRIPTION
HINT;
wWhen the connector for the throttle position sensor is disconnected, diagnostic trouble code 41
is not displayed. Diagnostic trouble code 41 is displayed only when there is an open or short in
the VTA signal circuit of the throttle position sensor.w
Open or short in throttle position sensor circuit.
wThrottle position sensor.
wECM Open or short in throttle position sensor circuit
for 0.5 sec. or more.Diagnostic Trouble Code Detecting Condition
Trouble Area
DTC 41 Throttle Position Sensor Circuit
DTC No.
The throttle position sensor is mounted in the throttle
body and detects the throttle valve opening angle. When
the throttle valve is fully closed, the I D L contacts in the
throttle position sensor are on, so the voltage at the ter±
minal I D L of the ECM become 0 V. At this time, a voltage
of approximately 0.7 V is applied to the terminal VTA of
the ECM. When the throttle valve is opened, the I D L
contacts go off and thus the power source voltage of
approximately 12 V in the ECM is applied to the terminal
IDL of the ECM. The voltage applied to the terminal VTA
of the ECM increases in proportion to the opening angle
of the throttle valve and becomes approximately 3.2 ±
4.9 V when the throttle valve is fully opened. The ECM
judges the vehicle driving conditions from these signals
input from the terminals VTA and IDL, and uses them as
one of the conditions for deciding the air±fuel ratio cor±
rection, power increase correction and fuel±cut control etc.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±376