abs TOYOTA CAMRY 2000 Service Repair Manual

3
CAMRY ± OUTLINE OF NEW FEATURES27
8. Brakes
The specifications of the front and rear brakes have been changed.
9. Suspension
The front and rear springs, stabilizers, and shock absorbers have been modified to realize excellent stability,
controllability, and riding comfort.
10. Steering
A check valve has been added to the power steering gear box to help reduce kickback.
The rack stroke of the 5S-FE engine model has been changed to 145mm (5.71 in.), which is the same as
in the 1MZ-FE engine.
11. Body
Hood support dampers are used.
Two utility hooks added in the luggage room for the gasoline engine model.
To install the fuel tank in the front area of the luggage compartment, the upper back panel has been cut
out for the 5S-FNE engine model.
A performance rod that joins the tops of the right and left rear suspension strut towers has been adopted
for the 5S-FNE engine model.
The shape of the rear floor pan has been changed to prevent the luggage compartment capacity from being
reduced as a result of the installation of the fuel tank in the luggage compartment for the 5S-FNE engine
model.
12. Seat
The seat cover of the LE grade model has been changed.
Optional driver power seat added for the LE grade model.
A fixed type seat back is used for the rear seat for the 5S-FNE engine model.
13. Seat Belt
2-point NR (Non-Retractor) seat belt is used for the rear center seat for the 5S-FNE engine model.
14. Wireless Door Lock Control
Audio answer back is adopted.
15. Lighting
Along with the adoption of the 4-beam headlights, the electrical circuit of the daytime running light system
has been changed.
16. Air Conditioning
The air inlet mode selector of heater control panel has been changed from the lever type to the push button
type on the CE and LE grade model.
When the air outlet mode is set to the DEF or FOOT / DEF mode, the air inlet mode also changes to the
FRESH mode, has been also added on the CE and LE grade model.
A fully automatic controlled type air conditioning is used on the XLE grade model.
A defroster-linked air conditioning start up control has been continuing to use since the previous models
with air conditioning.
17. SRS Airbag
The inflator of the SRS airbag for the driver has been made more compact and lightweight.
A signal that causes the supply of fuel to be cut off during a frontal collision is output by the airbag sensor
assembly to the ECM for the 5S-FNE engine model.

3
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)

CAMRY ± NEW FEATURES
167CN11
Intake Air
Temp. SensorSpeedometerFuel Gage & Warning
MIL
DLC3
Airbag Sensor Assembly
ECM
VSV
(for EGR)
EGR Vacuum
ModulatorIAC Valve
Throttle
Position
Sensor
Fuel Temp.
Sensor
Fuel Shutoff
ValveFuel
Pressure
Regulator
Oil
SeparatorFuel
Shutoff
Valve
Fuel
Pressure
Sensor
EGR Valve
Crankshaft Position
Sensor Manifold
Absolute
Pressure
SensorFuel Pressure
Sensor
Engine Coolant
Temp. Sensor
Camshaft
Position
Sensor
Air Fuel
Ratio Sensor
WU-TWC
Heated Oxygen Sensor
TWCManual Fuel
Shutoff
ValveFuel Filter
Fuel TankFuel Temp. Sensor
Fuel Shutoff Valve
Coupler 52
Engine Control System Diagram

To reduce NC emissions, evaporated fuel from the fuel tank is routed through the charcoal canister to the intake manifold
for combustion in the cylinders.
EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM
NC from tank is absorbed
into the canister
HC from tank is absorbed
into the canister. HC from canister is led
into air intake chamber.
Air is led into the fuel
tank. Positioned above
port P Positioned below
port P Engine Coolant
Temp.Throttle Valve
OpeningEvaporated Fuel (HC)
Above
54
C (129F)Canister Check Valve
High pressure
in tank
High vacuum
in tankBelow
35
C (95F)Check
Valve In
Cap
CLOSED
CLOSED
CLOSEDCLOSED CLOSED
OPEN
OPEN OPEN OPEN
OPEN TVV
± 5S±FE ENGINEEMISSION CONTROL SYSTEMSEG1±149

Fuel pumped up by the fuel pump, flows through the fuel filter and is distributed to each injector
at a set pressure maintained by the pressure regulator.
The fuel pressure regulator adjusts the pressure of the fuel from the fuel line (high pressure side)
to a pressure 284 kPa (2.9 kgf/cm
, 41 psi) higher than the pressure inside the cylinder head, and
excess fuel is returned to the fuel tank through the return pipe.
The pulsation damper absorbs the slight fluctuations in fuel pressure caused by fuel injector from
the injector.
The injectors operate on input of injection signals from the ECM and inject fuel into the cylinder
head.
OPERATION
FUEL SYSTEM
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±167

MAP SENSOR INSPECTION
1. INSPECT POWER SOURCE VOLTAGE OF MAP
SENSOR
(a) Disconnect the MAP sensor connector.
(b) Turn the ignition switch ON.
(c) Using a voltmeter measure the voltage between con±
nector terminals VC and E2 of the wiring harness side.
Voltage:
4.75 ± 5.25 V
(d) Reconnect the MAP sensor connector.
MANIFOLD ABSOLUTE PRESSURE
(MAP) SENSOR
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±221

All conditions below are detected continuously for 8 sec. or more.
(a) No.1 vehicle speed sensor signal: 0 mph (km/h)
(b) Engine speed: Between 3,100 rpm and 5,000 rpm.
(e) Engine coolant temp.: 80
C (176F) or more.
(d) Load driving.
Engine speed varies by more than 15 rpm over the preceding
crankshaft position period during a period of 50 sec. or more
under conditions (a) and (b),
(2 trip detection logic)*
(a) Engine speed: Idling
(b) Engine coolant temp.:60C (140F) or more.
Main oxygen sensor signal is 0.45 V or more and sub oxygen
sensor signal is 0.45 V or less under conditions
(a) and
(b).
(2 trip detection logic)*
(a) Engine coolant temp.: 80C (176F) or more.
(b) Accel. pedal: Fully depressed for 2 sec. or more.
All conditions below are detected continuously for 8 sec. or more.
(a) No.1 vehicle speed sensor signal: 0 mph (km/h)
(b) Engine speed: 3,100 rpm or more.
(c) Park/Neutral position switch: OFF
Open or short in manifold absolute pressure sensor circuit
for 0.5 sec. or more.
Open or short in throttle position sensor circuit for 0.5 sec. or more.Diagnostic Trouble Code
Detecting Condition
No.1 Vehicle
Speed Sensor
Signal
(for M /T)Manifold Absolute
Pressure Sensor
Signal
No±1 Vehicle
Speed Sensor
Signal
(for A/T) Throttle Position
Sensor SignalAir±Fuel Ratio
Rich Malfunction
Sub Oxygen
Sensor Signal
*: See page EG1±307Number of
MIL Blinks DTC
No.
Circuit
± 5S±FE ENGINEDIAGNOSTIC TROUBLE CODE CHARTEG1±304

wOpen or short in injector circuit
wFuel line pressure (injector leak, blockage)
wMechanical system malfunction (skipping teeth of timing
belt)
wIgnition system
wCompression pressure (foreign object caught in valve)
wAir leakage
w ECM
wOpen or short in No.1 vehicle speed sensor circuit
wNo.1 vehicle speed sensor
wCombination meter
wECM wOpen or short in manifold absolute pressure sensor circuit.
wManifold absolute pressure sensor
wECM
wOpen or short in throttle position sensor circuit
wThrottle position sensor
wECM wOpen or short in sub oxygen sensor circuit
wSub oxygen sensor
wECMMalfunction
Indicator
Lamp*

*
,*: See page EG1±306Normal
Mode Trouble Area
Memory*
Test
ModeSee page
EG1±380EG1±369
EG1±376EG1±372EG1±363
OFF OFF
± 5S±FE ENGINEDIAGNOSTIC TROUBLE CODE CHARTEG1±305

CLEAR DIAGNOSTIC TROUBLE CODES
See page EG1±299.
SET TEST MODE
1. With the ignition switch off, using SST, connect the ter±
minals TE2 and E1 of the data link connector 1 and 2.
SST 09843±18020
2. Start the engine and check to see the malfunction indica±
tor lamp to go off.
PERFORM A SIMULATION TEST
Using the symptom simulation (See page IN ±24), apply vibra±
tion to and pull lightly on the wire harness, connector or
terminals in the circuit indicated by the malfunction code.
In this test, if the malfunction indicator lamp light up, it indi±
cates that the place where the wire harness, connector or
terminals being pulled or vibrated has faulty contact. Check
that point for loose connections, dirt on the terminals, poor fit
or other problems and repair as necessary.
HINT: After cancelling out the diagnostic trouble code in
memory and set the test mode, if the malfunction indicator
lamp does not go off after the engine is started, check thor±
oughly for faulty contact, etc., then try the check again. If the
malfunction indicator lamp still does not go off, check and
replace ECM.
CHECK FOR MOMENTARY
INTERRUPTION
As described in the preceding paragraph, abnormality detec±
tion ability in the test mode is increased compared to that in
the normal mode, so that when momentary interruptions or
momentary shorts occur in the ECM signal circuits (G, NE,
THW, THA, PIM, VTA) shown in the table below, the appro±
priate diagnostic trouble code is output.
Accordingly, when the diagnostic trouble codes shown in the
table below (13, 22, 24, 31, 41) are output during the diag±
nostic trouble code check, and inspection of the appropriate
circuits reveals no abnormality, perform the check for momen±
tary interruption as described below.
By performing the check for momentary interruption, the
place where momentary interruptions or momentary shorts are
occurring due to poor contacts can be isolated.
Engine coolant temp. sensor
circuit
Manifold absolute pressure
sensor circuit
Throttle position sensor circuitIntake air temp. sensor circuitG, NE signal circuit (No.2)Circuit DTC
± 5S±FE ENGINECHECK FOR MOMENTARY INTERRUPTIONEG1±309