Knock sensor TOYOTA CAMRY 2000 Service Repair Manual

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

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

(c) Install the vacuum hose bracket and engine wire har±
ness with the bolt.
(d) Install the No.1 air intake chamber and manifold stays,
wire bracket with the 4 bolts.
14 mm head bolt
Torque: 42 N±m (425 kgf±cm, 31 ft±lbf)
12 mm head bolt
Torque: 22 N±m (220 kgf±cm, 16 ft±lbf)
17. INSTALL VSV OR VSV ASSEMBLY
18. CALIFORNIA ONLY:
CONNECT VSV (FOR FUEL PRESSURE CONTROL)
CONNECTOR
19. CONNECT KNOCK SENSOR AND VSV (FOR EGR)
CONNECTORS
20. INSTALL 2 ENGINE WIRE GROUND STRAPS TO
INTAKE MANIFOLD(b) Install a new gasket and the intake manifold with the
6 bolts and 2 nuts. Uniformly tighten the bolts and
nuts in several passes.
Torque: 19 N±m (195 kgf±cm, 14 ft±lbf)
16. INSTALL INTAKE MANIFOLD
(a) Connect the 2 wire clamps to the wire brackets on the
intake manifold.
21. CALIFORNIA:
INSTALL AIR TUBE
(a) Install the air tube and wire clamp with the 3 bolts.
± 5S±FE ENGINEENGINE MECHANICALEG1±76

9. REMOVE TIMING BELT AND PULLEYS
10. REMOVE CYLINDER HEAD
11. REMOVE WATER PUMP AND GENERATOR
ADJUSTING BAR
12. REMOVE OIL PAN AND OIL PUMP
13. REMOVE OIL FILTER
14. w/ OIL COOLER:
REMOVE OIL COOLER 4. REMOVE REAR END PLATE
Remove the bolt and end plate.
5. INSTALL ENGINE TO ENGINE STAND FOR
DISASSEMBLY
6. REMOVE GENERATOR
7. REMOVE DISTRIBUTOR1. M/T:
REMOVE CLUTCH COVER AND DISC
2. M/T:
REMOVE FLYWHEEL
3. A/T:
REMOVE DRIVE PLATE
15. REMOVE KNOCK SENSOR
Using SST, remove the knock sensor.
SST 09816 ± 300108. REMOVE PS PUMP BRACKET
Remove the 3 bolts and PS pump bracket.
PREPARATION FOR DISASSEMBLY
± 5S±FE ENGINEENGINE MECHANICALEG1±93

2. w/ OIL COOLER:
INSTALL OIL COOLER
3. INSTALL OIL FILTER
4. INSTALL OIL PUMP AND OIL PAN
5. INSTALL WATER PUMP AND GENERATOR
ADJUSTING BAR
6. INSTALL CYLINDER HEAD
7. INSTALL PULLEYS AND TIMING BELT
POST ASSEMBLY
1. INSTALL KNOCK SENSOR
Using SST, install the knock sensor.
SST 09816±30010
Torque: 37 N±m (380 kgf±cm. 27 ft±lbf)
8. INSTALL PS PUMP BRACKET
Install the PS pump bracket with 3 bolts.
Torque: 43 N±m (440 kgf±cm, 32 ft±lbf)
9. INSTALL GENERATOR
10. INSTALL DISTRIBUTOR
11. REMOVE ENGINE STAND
12. INSTALL REAR END PLATE
Torque: 9.3 N±m (95 kgf±cm, 82 in.±lbf)
± 5S±FE ENGINEENGINE MECHANICALEG1±125

No. 1 balance shaft housing x No. 2 balance shaft housing (1st)
No. 1 balance shaft housing x No. 2 balance shaft housing (2nd)
FR engine mounting insulator x Front suspension member
RR engine mounting insulator x Front suspension member Exhaust manifold stay x FR engine mounting insulator No. 1 air intake chamber stay x Intake manifold
RR engine mounting insulator x Cylinder block
FR engine mounting insulator x Cylinder block No. 1 air intake chamber stay x Cylinder head
No. 1 exhaust manifold stay x Cylinder block
Connecting rod cap x Connecting rod (2nd) Connecting rod cap x Connecting rod (1 st)
LH engine mounting insulator x Transaxle No. 1 exhaust manifold stay x WU ±TWC Water bypass pipe x Water pump cover
Fuel inlet hose x Fuel filter (Union bolt) No. 3 timing belt cover x Cylinder head
Intake manifold stay x Intake manifoldCamshaft bearing cap x Cylinder head
Intake manifold stay x Cylinder blockCylinder head x Cylinder block (2nd)
Rear oil seal retainer x Cylinder block Exhaust manifold stay x WU ±TWC
PS pump bracket x Cylinder block Main bearing cap x Cylinder block Generator bracket x Cylinder head
A/C compressor x Cylinder block Pulsation damper x Delivery pipe
Exhaust manifold x Cylinder head
Engine balancer x Cylinder block
Front exhaust pipe x WU ±TWC Spark plug tube x Cylinder head
Rear end plate x Cylinder block Throttle body x Intake manifold Intake manifold x Cylinder heedEngine hanger x Cylinder head
Drive plate x Crankshaft (A/T)Knock sensor x Cylinder block Delivery pipe x Cylinder head
PS pump x PS pump bracketWU±TWC x Exhaust manifold
Flywheel x Crankshaft (M/T) Water outlet x Cylinder headEGR valve x intake manifold
EGR pipe x Cylinder head
± 5S±FE ENGINEENGINE MECHANICALEG1±144

10. DISCONNECT VACUUM HOSES
Disconnect the following hoses:
(1) MAP sensor hose from air intake chamber
(2) Brake booster vacuum hose from air intake chamber
(3) Vacuum sensing hose from fuel pressure regulator
11. w/ A/C:
DISCONNECT A/C IDLE±UP VALVE CONNECTOR
12. DISCONNECT 2 ENGINE WIRE GROUND STRAPS
FROM INTAKE MANIFOLD
13. DISCONNECT KNOCK SENSOR AND VSV (FOR
EGR) CONNECTORS
14. CALIFORNIA ONLY:
DISCONNECT VSV (FOR FUEL PRESSURE CONTROL)
CONNECTOR AND VACUUM HOSES
15. REMOVE BOLT AND WIRE CLAMP, AND DISCON±
NECT ENGINE WIRE HARNESS 9. REMOVE EGR VALVE AND VACUUM MODULATOR
(a) Disconnect the EGR gas temperature sensor connec-
tor.
(b) Disconnect the following hoses:
(1) 2 vacuum hoses from VSV (for EGR)
(2) Vacuum hose from charcoal canister
(c) Disconnect the vacuum hose clamp.
16. REMOVE INTAKE MANIFOLD
(a) Remove the 4 bolts, wire bracket, No.1 air intake
chamber and manifold stays. (d) Loosen the union nut of the EGR pipe, and remove the
2 nuts, the EGR valve, vacuum modulator, vacuum
hoses assembly and gasket.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±193

4. CONNECT ENGINE WIRE HARNESS WITH WIRE
CLAMP AND BOLT
5. CALIFORNIA ONLY:
CONNECT VSV (FOR FUEL PRESSURE CONTROL)
CONNECTOR AND VACUUM HOSES
6. CONNECT KNOCK SENSOR AND VSV (FOR EGR)
CONNECTORS
7. CONNECT 2 ENGINE WIRE GROUND STRAPS TO
INTAKE MANIFOLD
10. INSTALL EGR VALVE AND VACUUM MODULATOR
(a) Install a new gasket and the EGR valve with the union
nut and 2 nuts.
Union nut
Torque: 59 N±m (600 kgf±cm. 43 ft±lbf)
Nut
Torque: 13 N±m (130 kgf±cm. 9 ft±lbf)
(b) Install the EGR vacuum modulator to the clamp. 8. CONNECT VACUUM HOSES
Connect the following hoses:
(1) MAP sensor hose to air intake chamber
(2) Brake booster vacuum hose to air intake chamber
(3) Vacuum sensing hose to fuel pressure regulator.
9. w/ A/C:
CONNECT A/C IDLE±UP VALVE CONNECTOR (c) Install the No. 1 air intake chamber and manifold stays,
wire bracket with the 4 bolts.
14 mm head bolt
Torque: 42 N±m (425 kgf±cm, 31 ft±lbf)
12 mm head bolt
Torque: 22 N±m (220 kgf±cm, 16 ft±lbf)
(b) Install a new gasket and the intake manifold with the
6 bolts and 2 nuts. Uniformly tighten the bolts and
nuts in several passes.
Torque: 19 N±m (195 kgf±cm, 14 ft±lbf)
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±199

*1; ªONº displayed in the diagnosis mode column indicates that the Malfunction Indicator Lamp is lighted up when a
malfunction is detected. ªOFFº indicates that the ªCHECKº does not light up during malfunction diagnosis, even if a
malfunction is detected. ªN.A.º indicates that the item is not included in malfunction diagnosis.
*2; ªOº in the memory column indicates that a diagnostic trouble code is recorded in the ECM memory when a malfunction
occurs. ªXº indicates that a diagnostic trouble code is not recorded in the ECM memory even if a malfunction occurs.
Accordingly, output of diagnostic results in normal or test mode is performed with the IG switch ON.
*3; Only for California specification vehicles.
*4; Only vehicles with A/T.EGR gas temp. is 70C (158F) or below for 50 sec. under
conditions (a) and (b).
(2 trip detection logic)*
(a) Engine coolant temp.: 80C (176F) or more.
(b) EGR operation possible (Ex. A/T in 3rd speed (5th for
M/T), 55 ± 60 mph (88 ± 96 km/h), Flat road).
(1) 3 sec. or more after engine starts with closed throttle position
switch OFF (IDL).
(2) * Park/Neutral switch OFF (PNP).
(Shift position in ªRº, ªDº, ª2º, or ªLº positions).
(3) A/C switch ON. Open or short in knock sensor circuit with engine speed
between 1,200 rpm and 6,000 rpm.Diagnostic trouble Code
Detecting Condition
Switch Condition
SignalNo starter signal to ECM.
Knock Sensor
Signal
EG R System
Malfunction Number of
MIL Blinks
Starter Signal DTC
No.Circuit
± 5S±FE ENGINEDIAGNOSTIC TROUBLE CODE CHARTEG1±306