ignition TOYOTA CAMRY 2000 Service Repair Manual

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GENERAL 2000 FEATURES
DESCRIPTION 2. . . . . . . . . . . . . . . . . . . . . . . . . . .
ENGINE
Evaporative Emission Control System3 . . . . . . . .
AUTOMATIC TRANSMISSION
Overdrive switch4 . . . . . . . . . . . . . . . . . . . . . . . . .
COROLLA
OUTLINE OF NEW FEATURES 6. . . . . . . . . . . .
MODEL CODE 7. . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 7. . . . . . . . . . . . . . . . . . . . . . . .
NEW FEATURES
1ZZ-FE Engine
Description8 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Major Difference9 . . . . . . . . . . . . . . . . . . . . . . .
Valve Mechanism10 . . . . . . . . . . . . . . . . . . . . . . .
Ignition System11 . . . . . . . . . . . . . . . . . . . . . . . .
Engine Control System12 . . . . . . . . . . . . . . . . . . .
Brakes
General20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Diagram20 . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic Circuit20 . . . . . . . . . . . . . . . . . . . . . . .
Operation21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CAMRY
OUTLINE OF NEW FEATURES 26. . . . . . . . . . . .
MODEL CODE 29. . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 30. . . . . . . . . . . . . . . . . . . . . . . . .
NEW FEATURES
Exterior31 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interior32 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5S-FE Engine
Description33 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Major Difference34 . . . . . . . . . . . . . . . . . . . . . . .
Intake and Exhaust System34 . . . . . . . . . . . . . . .
Fuel System35 . . . . . . . . . . . . . . . . . . . . . . . . . . .
5S-FNE Engine
Description36 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features of 5S-FNE Engine38 . . . . . . . . . . . . . . .
Engine Proper39 . . . . . . . . . . . . . . . . . . . . . . . . . .
Valve Mechanism40 . . . . . . . . . . . . . . . . . . . . . . .
Intake and Exhaust System41 . . . . . . . . . . . . . . .
Fuel System43 . . . . . . . . . . . . . . . . . . . . . . . . . . .
Ignition System48 . . . . . . . . . . . . . . . . . . . . . . . .
Engine Control System49 . . . . . . . . . . . . . . . . . . .
1MZ-FE Engine54 . . . . . . . . . . . . . . . . . . . . . . . . .
Automatic Transaxle54 . . . . . . . . . . . . . . . . . . . . . .
Brakes55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Steering56 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Body57 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Lighting58 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Air Conditioning59 . . . . . . . . . . . . . . . . . . . . . . . . .
SRS Airbag59 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CAMRY SOLARA
OUTLINE OF NEW FEATURES 62. . . . . . . . . . . .
MODEL CODE 64. . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 64. . . . . . . . . . . . . . . . . . . . . . . . .
SIENNA
OUTLINE OF NEW FEATURES 66. . . . . . . . . . . .
MODEL CODE 67. . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 67. . . . . . . . . . . . . . . . . . . . . . . . .
RAV4
OUTLINE OF NEW FEATURES 70. . . . . . . . . . . .
MODEL CODE 71. . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 71. . . . . . . . . . . . . . . . . . . . . . . . .
TOYOTA TACOMA
OUTLINE OF NEW FEATURES 74. . . . . . . . . . . .
MODEL CODE 76. . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 77. . . . . . . . . . . . . . . . . . . . . . . . .
NEW FEATURES
2RZ-FE and 3RZ-FE Engine
Description78 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LEV Compliance78 . . . . . . . . . . . . . . . . . . . . . . .
Differential82 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4RUNNER
OUTLINE OF NEW FEATURES 84. . . . . . . . . . . .
MODEL CODE 86. . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 86. . . . . . . . . . . . . . . . . . . . . . . . .
LAND CRUISER
OUTLINE OF NEW FEATURES 88. . . . . . . . . . . .
MODEL CODE 90. . . . . . . . . . . . . . . . . . . . . . . . . . .
MODEL LINE-UP 90. . . . . . . . . . . . . . . . . . . . . . . . .
NEW FEATURES
Engine91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Differential91 . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Brakes
General92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Function92 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Diagram93 . . . . . . . . . . . . . . . . . . . . . . . .
Layout of Components94 . . . . . . . . . . . . . . . . . . .
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TABLE OF CONTENTS

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CAMRY ± NEW FEATURES
172CM14
Fuel
Pressure
SensorFuel Temp.
SensorFuel
Pressure
RegulatorFuel Shutoff ValveFuel Tank
Fuel Shutoff ValveRelief Valve
Inlet Check
Valve
Fuel Temp.
Sensor
Coupler
Tank Valve Assembly
Vent Tube Manual
Shutoff
Valve Oil
Separator
Fuel Shutoff Valve Injectors
Delivery Pipe Discharge
ValveFuel
Pressure
SensorFuel
Filter43
6. Fuel System
General
The compressed gas [maximum pressure approximately 250 kg / cm
2 (3600 psi, 24.8 MPa) @ 21C
(70F)] from the CNG fuel tank located in the rear section of the vehicle is routed via a fuel filter to the
engine compartment. The pressure of the fuel is then reduced to 8 kg / cm
2 (114 psi, 785 kPa).
A pressure regulator and injectors designed exclusively for CNG application have been adopted.
A fuel pressure sensor and a fuel temperature sensor that are used for the correction of the fuel injection
volume are located on the delivery pipe.
The fuel tank, pressure regulator, and the delivery pipe are provided with shutoff valves that shut off the
fuel when the ignition switch is turned OFF.
In addition, these valves shut off the fuel when the engine stalls, the SRS airbag is deployed, or the pres-
sure in the main pipe becomes abnormally low.
A fuel temperature sensor for the fuel gauge is mounted on the tank valve assembly, and a fuel pressure
sensor is mounted immediately upstream of the pressure regulator.

Fuel System Diagram 

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CAMRY ± NEW FEATURES
172CM17
CloseOpen45
2) Fuel Shutoff Valve for Fuel Tank
This valve uses an solenoid valve. The main pipe that supplies compressed gas to the engine is connected
to this valve, which opens when the ignition switch is turned ON. If the engine stalls, this valve automati-
cally shuts off the fuel even if the ignition switch is turned ON. The valve reopens upon restarting the
engine.
Also, this valve shuts off the fuel if the SRS airbag is deployed in a collision or if the pressure in the main
pipe becomes abnormally low.
3) Inlet Check Valve
Connected to a filler pipe that guides the fuel that fills through the coupler, the inlet check valve shuts
off by the force of a spring and by the pressure of the gas in the tank.
During filling, the pressure of the filling gas opens the inlet check valve.
4) Relief Valve
A vent tube is connected to this valve.
If the fuel tank is exposed to an abnormally high temperature, this valve opens (by melting) to discharge
the CNG at a predetermined temperature, thus helping prevent the fuel tank from bursting due to the in-
crease in gas pressure.
The discharged CNG is guided under the floor through a vent tube and is released outside of the vehicle.
Coupler
The coupler allows the fuel to be filled when it is connected with a fuel filling nozzle. The coupler has a
built-in check valve to help prevent the CNG from flowing backward.
Manual Shutoff Valve
This valve is mounted below the vehicle floor.
When servicing the vehicle, this valve can be
manually turned 90 degrees to shut off the main
pipe.

CAMRY ± NEW FEATURES
172CM16
: Plating Area
Platinum Tip
48
Fuel Temperature and Pressure Sensor for Fuel Gage
A fuel temperature sensor that detects the temperature in the fuel tank is provided on the tank valve assem-
bly.
A fuel pressure sensor that detects the pressure in the fuel main pipe is provided immediately upstream of
the fuel pressure regulator.
The pressure and the temperature of the fuel are detected by these sensors and are input into the ECM.
These values are then converted by the ECM into the equivalent pressure at 21C to actuate the fuel gauge.
7. Ignition System
Because the spark plugs are susceptible to rust when used with natural gas, corrosion-resistant spark plugs
have been adopted. These spark plugs are the platinum-tipped spark plugs that have their metallic portion
plated.

Recommended Spark Plug 
DENSOPK20TR8-G
Plug Gap0.8 ± 1.0 mm (0.031 ± 0.39 in.)

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CAMRY ± NEW FEATURES49
8. Engine Control System
General
An engine control system based on the 5S-FE engine has been adopted. The knock sensor has been discon-
tinued because natural gas has a high octane value and is less susceptible to knocking.
The engine control system of 5S-FNE and 5S-FE engines are compared below.
System
Outline5S-FNE5S-FE
SFI
Se
quential
A D-type SFI system is used, which indirectly detects
intake air volume by manifold absolute pressure sensor.Sequential
Multiport Fuel
InjectionThe fuel injection system is a sequential multiport fuel
injection system.
Ignition timing is determined by the ECM based on
signals from various sensors.
ESA
Electronic Spark
AdvanceThe ECM corrects the ignition timing in response to
engine knocking in accordance with the signals
received from the knock sensor.
Ð
dva ce
Torque control correction during gear shifting had been
used to minimize the shift shock.*1
IAC
(Idle Air Control)A rotary solenoid type IAC valve controls the fast idle
and idle speeds.(1-Coil Type
Built-in Driver)(2-Coil Type)
Fuel Pump ControlFuel pump operation is controlled by signal from the
ECM.Ð
Fuel Cut-Off
Control
The fuel shutoff valves for the fuel tank, fuel pressure
regulator, and delivery pipe are shut off to stop the
supply of fuel when the ignition switch is turned OFF or
during abnormal conditions (such as engine stalling,
SRS airbag deployed, etc.).
Ð
Injector ControlPrevents the frozen stuck of the injector to ensure the
startability of the engine at low temperature.Ð
Oxygen Sensor
and Air Fuel Ratio
Sensor
Heater ControlMaintains the temperature of the oxygen sensor and air
fuel ratio sensor at an appropriate level to increase
accuracy of detection of the oxygen concentration in the
exhaust gas.
*2
EGR Cut-Off
ControlCuts off EGR according to the engine condition to
maintain drivability of the vehicle and durability of the
EGR components.

Evaporative
Emission ControlThe ECM controls the purge flow of evaporative
emissions (HC) in the charcoal canister in accordance
with engine conditions.
Ð
Air Conditioning
Cut-Off ControlBy turning the air conditioning compressor ON or OFF
in accordance with the engine condition, drivability is
maintained.
*3*3
Diagnosis
When the ECM detects a malfunction, the ECM
diagnoses and memorized the failed section.
DiagnosisThe diagnosis system includes a function that detects a
malfunction in the evaporative emission control system.Ð
Fail-Safe
When the ECM detects a malfunction, the ECM stops or
controls the engine according to the data already stored
in memory.

*1: Only for Automatic Transaxle Model
*
2: Air fuel ratio sensor only for California specification model
*
3: The air conditioning magnet clutch controled by the ECM

CAMRY ± NEW FEATURES
No.4 INJECTOR
SPARK PLUGSIGNITERS and
IGNITION COILS
No.2 INJECTOR
No.1 INJECTOR
No.3 INJECTOR
SENSORS ACTUATORS
MANIFOLD ABSOLUTE
PRESSURE SENSORSFI PIM#10+
CRANKSHAFT POSITION
SENSORNE
CAMSHAFT POSITION
SENSORG
ENGINE COOLANT TEMP.
SENSORTHW
INTAKE AIR TEMP. SENSORTHA
THROTTLE POSITION SENSORVTA
COMBINATION METER
SPD
Vehicle Speed Signal
AIR FUEL RATIO SENSOR
(Bank 1, Sensor 1)AF
HEATED OXYGEN SENSOR
(Bank 1, Sensor 2)OX2
POWER STEERING OIL
PRESSER SWITCHPSW
TAILLIGHT & REAR WINDOW
DEFOGGER SYSTEMELS
IGNITION SWITCHSTA
PARK / NEUTRAL POSITION
SWITCHNSW
STOP LIGHT SWITCHSTP
AIRBAG SENSOR ASSEMBLY
F/PS
Fuel Cut-Off Signal
#10
#20+
#20
#30+
#30
#40+
#40
ESA
IGT1,
IGT2
IGF
CONTROL VALVEIACRSD
VSV EGREGR
AIR FUEL RATIO SENSOR
HEATER AIR FUEL RATIO SENSOR
HEATER CONTROLHTAF
HEATED OXYGEN SENSOR
HEATER OXYGEN SENSOR HEATER
CONTROLHT2
MAGNET CLUTCH RERAYAIRE CONDITIONING
CUT-OFF CONTROLMGC
FUEL GAGE
LOW FUEL LEVEL WARNING
LIGHT
ECM
AIR CONDITIONING SWITCHA/C SW
R, 2, L
FUEL
FUEL W
50
Construction
The configuration of the engine control system in the 5S-FNE engine is as shown in the following chart.
(Continued)

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CAMRY ± NEW FEATURES
172CM18
172CM19
ON
OFF1 sec 1 sec
1 sec 1 sec
ON
OFF1 sec 1 sec
2 sec 2 sec 2 sec53
Injector Control
1) General
Fuel clearing control and injector unsticking control have been added to the injector control.
2) Fuel Clearing Control
While the vehicle is being driven at speeds higher than 60 km / h (37.5 mph), and the ignition switch is
turned OFF after the ECM has detected a low temperature condition of less than 25C (77F) of intake
air temperature, the ECM closes the fuel shutoff valve for the delivery pipe. However, instead of immedi-
ately stopping the engine, the fuel clearing control allows the engine to stop on its own after the fuel in
the delivery pipe has been used up. If the engine is running even after 2 seconds or more have elapsed
after the ignition switch has been turned OFF, the EFI relay is turned OFF to stop the engine.
3) Injector Unsticking Control
When the ignition switch is turned ON after executing the fuel clearing control, the injector unsticking
control activates two cylinders at a time to unstick the valve that is frozen stuck onto the valve seat. At
low temperature conditions. At this time, the shutoff valve remains closed so that the injectors will not
inject fuel.
Gas Leak Judgment
If the ECM has detected a gas leak through the signals received from the pressure sensors, the ECM closes
the shutoff valves and flashes the low fuel level warning light.
These functions are canceled by resetting the ECM (by disconnecting the negative [-] terminal of the bat-
tery), which enables the engine to start.
(The ECM should be reset only after performing a gas leak check and making sure that the leak has been
eliminated.)
NOTE: The low fuel level warning light also flashes when the fuel level is extremely low. The flashing
patterns shown below differentiates a gas leak from a low fuel level.
Flashing Pattern
Gas Leak
Fuel Low Level

GENERAL 2000 FEATURES
172GN01
172GN02New
Previous ECMODLP
ODMSO / D OFF
Indicator
Light
O / D Switch
(Momentry
Type)O / D OFF
Indicator
LightON
OFF
O/D
SwitchON
OFF
Ignition
SwitchON
OFF
ECM
OD2O / D OFF
Indicator
Light
O / D Switch
(Lock Type)O / D OFF
Indicator
LightON
OFF
O/D
Switch
ConditionON
OFF
Real
Switch
ConditionON
OFF
Ignition
SwitchON
OFF 2
AUTOMATIC TRANSMISSION

OVERDRIVE SWITCH
The overdrive switch has been changed from the previous ON / OFF lock type to the momentary type switch.
Pressing the momentary switch closes (turns ON) the contact points, and releasing the switch opens (turns
OFF) the contact points. Accordingly, pressing the switch causes the signal to be input into the ECM.
Pressing the switch in overdrive turns OFF the overdrive. Pressing it again turns the overdrive back ON.
When the overdrive is OFF, turning the ignition switch from OFF to ON turns the overdrive back ON.

2. Except Delco Battery:
CHECK BATTERY VOLTAGE AND SPECIFIC
GRAVITY
A. Maintenance Free Battery
Measure the battery voltage between the terminals
negative (±) and positive (+) of the battery.
Standard voltage:
12.7 ± 12.9 V at 205C (685F)
HINT:
wBefore measuring the voltage, turn the ignition
switch to LOCK and turn off the electrical sys±
tems (headlight, blower motor, rear defogger etc.)
for 60 seconds to remove the surface charge.
wIf the vehicle has been running, wait 5 minutes or
more after the vehicle stops before measuring
the battery voltage.
If the voltage is less than specification, charge the
battery.
HINT: Check the indicator as shown in the illustration. 1. Except Delco Battery:
CHECK BATTERY ELECTROLYTE LEVEL
Check the electrolyte quantity of each cell.
A. Maintenance Free Battery
If under the lower level, replace the battery (or add
distilled water if possible). Check the charging system.
B. Except Maintenance Free Battery
If under the ªLOWERº or ªMINº line, add distilled
water.
BATTERY INSPECTION
± 5S±FE ENGINEENGINE MECHANICALEG1±9

GENERATOR DRIVE BELT INSPECTION
INSPECT DRIVE BELT
(a) Visually check the drive belt for excessive wear,
frayed cords etc.
If any defect has been found, replace the drive belt.
HINT: Cracks on the rib side of a drive belt are consid±
ered acceptable. If the drive belt has chunks missing
from the ribs, it should be replaced.4. INSPECT HIGH±TENSION CORD RESISTANCE
Using an ohmmeter, measure the resistance.
Maximum resistance:
25 k
per cord
If the resistance is greater than maximum, check the
terminals. If necessary, replace the high ± tension
cord.
5. RECONNECT HIGH±TENSION CORDS TO
DISTRIBUTOR CAP
6. CALIFORNIA ONLY:
RECONNECT HIGH±TENSION CORD TO IGNITION
COIL
7. RECONNECT HIGH±TENSION CORDS TO SPARK
PLUGS2. CALIFORNIA ONLY:
DISCONNECT HIGH±TENSION CORD FROM
IGNITION COIL
3. DISCONNECT HIGH ±TENSION CORDS FROM
DISTRIBUTOR CAP
(b) Using a belt tension gauge, measure the belt tension.
Belt tension gauge:
Nippondenso BTG±20 (95506±00020)
Borroughs No. BT±33±73F
± 5S±FE ENGINEENGINE MECHANICALEG1±11