2000 TOYOTA CAMRY Stalling

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

3
CAMRY ± NEW FEATURES
167CN16
167CN18 167CN17
A ± A Cross Section
Performance RodCut Area
Dumper Stay
Rear Floor Pan for
Gasoline Engine Model
Rear Floor Pan for
CNG Engine ModelMain Muffler
for Gasoline
Engine Model
A
A57
BODY
To install the fuel tank in the front area of the luggage compartment, the upper back panel has been cut
for the 5S-FNE engine model.
To prevent reducing the rigidity of the body due to the upper back panel that has been cut out, as well as
for installing the fuel tank, rear seat back, and package tray trim, a performance rod is used for joining both
rear suspension strut towers for the 5S-FNE engine model.
The luggage door support has been changed from the torsion bar to the damper stay type for the 5S-FNE
engine model.
To prevent reducing the capacity of the luggage compartment due to the installation of the fuel tank in the
luggage compartment, the shape of the rear floor pan has been changed.

Drive belt tension:
w/ A/C
New belt
175 + 5 lbf
Used belt
130 + 10 lbf
w/o A/C
New belt
125 + 25 lbf
Used belt
95 + 20 lbf
If the belt tension is not as specified, adjust it.
HINT:
wªNew beltº refers to a belt which has been used
less than 5 minutes on a running engine.
wªUsed beltº refers to a belt which has been used
on a running engine for 5 minutes or more.
wAfter installing a belt, check that it fits properly in
the ribbed grooves.
wCheck with your hand to confirm that the belt has
not slipped out of the groove on the bottom of
the pulley.
wAfter installing a new belt, run the engine for
about 5 minutes and recheck the belt tension.
VALVE CLEARANCE INSPECTION AND
ADJUSTMENT
HINT: Inspect and adjust the valve clearance when
the engine is cold.
1. DISCONNECT HIGH ± TENSION CORDS FROM
SPARK PLUGS
Disconnect the high ± tension cords at the rubber
boot. DO NOT pull on the cords.
NOTICE: Pulling on or bending the cords may damage the
conductor inside.
2. REMOVE CYLINDER HEAD COVER
(a) Disconnect the PCV hoses.
(b) Loosen the 2 wire harness clamp bolts (No.2 timing
belt cover) mounting bolts.
(c) Remove the 4 nuts, grommets, head cover and gasket.
± 5S±FE ENGINEENGINE MECHANICALEG1±12

wDo not utilize timing belt tension when installing or
removing the mounting bolt of the camshaft timing
pulley.
If there are any defects as shown in the illustration,
check the following points:
(a) Premature parting
wCheck for proper installation.
wCheck the timing cover gasket for damage and
proper installation.
(b) If the belt teeth are cracked or damaged, check to see
if either camshaft or water pump is locked.
(e) If there is noticeable wear on the belt teeth, check the
timing cover for damage, correct gasket installation,
and for foreign material on the pulley teeth.
If necessary, replace the timing belt. (c) If there is noticeable wear or cracks on the belt face,
check to see if there are nicks on the side of the idler
pulley lock.
(d) If there is wear or damage on only one side of the belt,
check the belt guide and the alignment of each pulley.
± 5S±FE ENGINEENGINE MECHANICALEG1±32

G. Inspect camshaft thrust clearance
(a) Install the camshaft.
(See step 4 on pages EG1±69 to 71)
(b) Using a dial indicator, measure the thrust clearance
while moving the camshaft back and forth.
Standard thrust clearance:
Intake
0.045 ± 0.100 mm (0.0018 ± 0.0039 in.)
Exhaust
0.030 ± 0.085 mm (0.0012 ± 0.0033 in.)
Maximum thrust clearance:
Intake
0.12 mm (0.0047 in.)
Exhaust
0.10 mm (0.0039 in.)
If the thrust clearance is greater than maximum, re±
place the camshaft. If necessary, replace the bearing
caps and cylinder head as a set.
H. Inspect camshaft gear backlash
(a) Install the camshafts without installing the exhaust
cam sub gear.
(See step 4 on pages EG1±69 to 71)
(b) Using a dial indicator, measure the backlash.
Standard backlash:
0.020 ± 0.200 mm (0.0008 ± 0.0079 in.)
Maximum backlash:
6.30 mm (0.0188 in.)
If the backlash is greater then maximum, replace the
camshafts. (f) Measure the Plastigage at its widest point.
Standard oil clearance:
0.025 ± 0.062 mm (0.0010 ± 0.0024 In.)
Maximum oil clearance:
0.10 mm (0.0039 in.)
If the oil clearance is greater than maximum, replace
the camshaft. If necessary, replace the bearing caps
and cylinder head as a set.
(g) Completely remove the Plastigage.
± 5S±FE ENGINEENGINE MECHANICALEG1±64

CYLINDER HEAD ASSEMBLY
(See Components for Removal and Installation)
HINT:
wThoroughly clean all parts to be assembled.
Before installing the parts, apply new engine oil to all
sliding and rotating surfaces.
wReplace all gaskets and oil seals with new ones.
(c) Using SST, compress the valve spring and place the 2
keepers around the valve stem.
SST 09202 ± 70010(b) Install the following parts:
(1) Valve
(2) Spring seat
(3) Valve spring
(4) Spring retainer 1. INSTALL VALVES
(a) Using SST, push in a new oil seal.
SST 09201 ±41020
HINT: The intake valve oil seal is brown and the
exhaust valve oil seal is black.
± 5S±FE ENGINEENGINE MECHANICALEG1±66

CYLINDER BLOCK ASSEMBLY
(See Components for Cylinder Block Disassembly and
Assembly)
HINT:
wThoroughly clean all parts to be assembled.
wBefore installing the parts, apply new engine oil
to all sliding and rotating surfaces.
wReplace all gaskets, 0±rings and oil seals with
new parts.
1. INSTALL MAIN BEARINGS
HINT:
wMain bearings come in widths of 19.2 mm (0.756
in.) and 22.9 mm (0.902 in.). Install the 22.9 mm
(0.902 in.) bearings in the No.3 cylinder block
journal position with the main bearing cap. Install
the 19.2 mm (0.756 in.) bearings in the other
positions. (b) Using a piston ring expander, install the 2 compres±
sion rings with the code mark facing upward.
Code mark:
N o.1
1N orT
No.2
2N or 2T
3. INSTALL BEARINGS
(a) Align the bearing claw with the groove of the connect±
ing rod or connecting cap.
(b) Install the bearings in the connecting rod and con±
necting rod cap. (c) Position the piston rings so that the ring ends are as
shown.
NOTICE: Do not align the ring ends.
± 5S±FE ENGINEENGINE MECHANICALEG1±119

ELECTRONIC CONTROL SYSTEM
1. Before removing MFI/SFI wiring connectors, termi±
nals, etc., first disconnect the power by either turning
the ignition switch OFF or disconnecting the battery
terminals.
HINT: Always check the diagnostic trouble code
before disconnecting the negative (±) terminal cable
from the battery.
2. When installing the battery, be especially careful not
to incorrectly connect the positive (+) and negative
(±) cables.
3. Do not permit parts to receive a severe impact during
removal or installation. Handle all MFI/SFI parts care±
fully, especially the ECM.
4. Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal
contact can further troubles.
5. Do not open the ECM cover.
6. When inspecting during rainy weather, take care to
prevent entry of water. Also, when washing the
engine compartment, prevent water from getting on
the MFI/SFI parts and wiring connectors.
7. Parts should be replaced as an assembly.
AIR INDUCTION SYSTEM
1. Separation of the engine oil dipstick, oil filler cap, PCV
hose, etc. may cause the engine to run out of tune.
2. Disconnection, looseness or cracks in the parts of the
air induction system between the throttle body and
cylinder head will allow air suction and cause the
engine to run out of tune.
IF VEHICLE IS EQUIPPED WITH MOBILE
RADIO SYSTEM (HAM, CB, ETC.)
If the vehicle is equipped with a mobile communica±
tion system, refer to the precaution in the IN section.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±173