2000 TOYOTA CAMRY knock

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

(09248±05011) Valve Lifter Press
(09248±05021) Valve Lifter Stopper
09226±10010 Crankshaft Front & Rear Bearing
Replacer
09616±30011 Steering Worm Bearing Adjusting
Screw Wrench09224±74010 Engine Balancer Backlash
Adjusting Tool
09330±00021 Companion Flange Holding Tool09248±55020 Valve Clearance Adjust Tool Set
RECOMMENDED TOOLS
09816±30010 Oil Pressure Switch Socket09278±54012 Drive Shaft Holding Tool09249±63010 Torque Wrench Adaptor
09843±18020 Diagnosis Check Wire
09090±04010 Engine Sling Device
09200±00010 Engine Adjust KitCamshaft timing pulley
For suspension engineCrankshaft pulley
Oil pump pulley
Knock sensor
± 5S±FE ENGINEENGINE MECHANICALEG1±5

9. INSTALL CAMSHAFT TIMING PULLEY
(a) Align the camshaft knock pin with the knock pin
groove of the pulley, and slide on the timing pulley.
(b) Using SST, install the plate washer and bolt.
SST 09249 ± 63010 and 09278 ± 54012
Torque: 37 N±m (380 kgf±cm, 27 ft±lbf)
HINT: Use a torque wrench with a fulcrum length of
340 cm (13.39 in.)8. INSTALL CRANKSHAFT PULLEY
(a) Align the pulley set key with the key groove of the
pulley, and slide on the pulley.
(b) Using SST, install the pulley bolt.
SST 09213±54015 (91651 ±60855)
09330±00021
Torque: 108 N±m (1,100 kgf±cm, 80 ft±lbf)
10. SET No.1 CYLINDER TO TDC/COMPRESSION
(a) Turn the crankshaft pulley, and align its groove with
timing mark ª0º of the No.1 timing belt cover. 7. INSTALL NO.1 TIMING BELT COVER
(a) Install the gasket to the timing belt cover.
(b) Install the timing belt cover with the 4 bolts. 6. INSTALL TIMING BELT GUIDE
Install the guide, facing the cup side outward.
± 5S±FE ENGINEENGINE MECHANICALEG1±35

20. CALIFORNIA:
REMOVE AIR TUBE
(a) Disconnect the following hoses:
(1) w/ A/C:
A/C hose (from ASV) from air tube
(2) 2 air hoses (from PS pump) from air tube
(3) California only:
2 vacuum hoses from VSV (for fuel pressure
control)
(4) Vacuum hose from air intake chamber
(b) Remove the 3 bolts, wire clamp and air tube.
21. DISCONNECT 2 ENGINE WIRE GROUND STRAPS
FROM INTAKE MANIFOLD
22. DISCONNECT KNOCK SENSOR AND VSV (FOR
EGR) CONNECTORS
23. CALIFORNIA ONLY:
DISCONNECT VSV (FOR FUEL PRESSURE CON±
TROL) CONNECTOR
24. REMOVE VSV OR VSV ASSEMBLY
25. REMOVE INTAKE MANIFOLD
(a) Remove the 4 bolts, wire bracket, No.1 air intake
chamber and manifold stays.
(b) Remove the bolt, vacuum hose bracket, and discon±
nect the engine wire.
(c) Remove the6 bolts, 2 nuts, intake manifold and
gasket.
± 5S±FE ENGINEENGINE MECHANICALEG1±47

(b) Secure the exhaust camshaft sub gear to drive gear
with a service bolt.
Recommended service bolt:
Thread diameter6 mm
Thread pitch 1.0 mm
Bolt length 16±20 m m (0.63±0.79 in.)
HINT: When removing the camshaft, make sure that
the torsional spring force of the sub gear has been
eliminated by the above operation. 35. REMOVE CAMSHAFTS
NOTICE: Since the thrust clearance of the camshaft is
small, the camshaft must be kept level while it is being
removed. If the camshaft is not kept level, the portion of
the cylinder head receiving the shaft thrust may crack or
be damaged, causing the camshaft to seize or break. To
avoid this, the following steps should be carried out.
A. Remove exhaust camshaft
(a) Set the knock pin of the intake camshaft at 10±455
BTDC of camshaft position.
HINT: The above angle allows No.2 and No.4 cylinder
cam lobes of the exhaust camshaft to push their valve
lifters evenly.HINT: Arrange the grommets in correct order, so that
they can be reinstalled into their original positions.
This minimizes any possibility of oil leakage due to
reuse of grommets.
34. REMOVE HIGH ± TENSION CORDS CLAMP AND
PCV VALVE
± 5S±FE ENGINEENGINE MECHANICALEG1±50

(f) Alternately loosen and remove the 2 bolts on the No.
3 bearing cap.
HINT:
wAs the 2 No.3 bearing cap bolts are loosened, make
sure that the camshaft is lifted out straight and level.
wIf the camshaft is not being lifted out straight and
level, retighten the 2 No.3 bearing cap bolts. Then
reverse the order of above steps from (f) to (a) and
reset the knock pin of the intake camshaft at 10±45

BTDC, and repeat steps from
(b) to
(f) once again.
NOTICE: Do not pry on or attempt to force the camshaft
with a tool or other object.
(g) Remove the No.3 bearing cap and exhaust camshaft.(d) Uniformly loosen and remove the6 bolts on the No. 1,
No.2 and No.4 bearing caps in several passes in the
sequence shown.
NOTICE: Do not remove the No.3 bearing cap bolts at this
stage.
(e) Remove the No. 1, No.2 and No.4 bearing caps.
B. Remove intake camshaft
(a) Set the knock pin of the intake camshaft at 80±115

BTDC of camshaft angle.
HINT: The above angle allows the No.1 and No.3
cylinder cam lobes of intake camshaft to push their
valve lifters evenly.(c) Remove the 2 bolts and rear bearing cap.
± 5S±FE ENGINEENGINE MECHANICALEG1±51

(e) Alternately loosen and remove the 2 bolts on the No.
2 bearing cap.
HINT:
wAs the 2 No.2 bearing cap bolts are loosened, make
sure that the camshaft is lifted out straight and level,
after breaking adhesion on the front bearing cap.
wIf the camshaft is not being lifted out straight and
level, retighten the 2 No.2 bearing cap bolts. Reverse
the order of above steps from (e) to (a) and reset the
knock pin of the intake camshaft at 80±115*6TDC,
and repeat steps from (b) to (e) once again.
NOTICE: Do not pry on or attempt to force the camshaft
with a tool or other object.
(f) Remove the No.2 bearing cap and camshaft. (c) Uniformly loosen and remove the6 bolts on the No.1,
No.3 and No.4 bearing caps in several passes in the
sequence shown.
NOTICE: Do not remove the No.2 bearing cap bolts at this
stage.
(d) Remove the No. 1, No.3 and No.4 bearing caps.
36. DISASSEMBLE EXHAUST CAMSHAFT
(a) Mount the hexagon wrench head portion of the cam±
shaft in a vise.
NOTICE: Be careful not to damage the camshaft.
(b) Remove the 2 bolts, front bearing cap and oil seal.
± 5S±FE ENGINEENGINE MECHANICALEG1±52

B. Install exhaust camshaft
(a) Set the knock pin of the intake camshaft at 10±455
BTDC of camshaft angle.
HINT: The above angle allows the No.2 and No.4
cylinder cam lobes of the exhaust camshaft to push
their valve lifters evenly.(e) Apply a light coat of engine oil on the threads and
under the heads of the bearing cap bolts.
(f) Install and uniformly tighten the 10 bearing cap bolts
in several passes, in the sequence shown.
Torque: 19 N±m (190 kgf±cm, 14 ft±lbf)
(h) Using SST, tap in the oil seal.
SST 09223±4601 1 (d) Install the bearing caps in their proper locations.
(g) Apply MP grease to a new oil seal lip.
± 5S±FE ENGINEENGINE MECHANICALEG1±70