ignition coil 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

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)

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

IDLE SPEED INSPECTION
1. INITIAL CONDITIONS
(a) Engine at normal operating temperature
(b) Air cleaner installed
(c) All pipes and hoses of air induction system connected
(d) All vacuum lines properly connected
(e) MFI/SFI system wiring connectors fully plugged
(f) All operating accessories switched OFF
(g) Ignition timing set correctly
(h) Transmission in neutral position
2. CONNECT TACHOMETER
Connect the test probe of a tachometer to terminal IG
(±) of the data link connector 1.
NOTICE:
wNever allow the tachometer terminal to touch
ground as it could result in damage to the Igniter
and/or ignition coil.
wAs some tachometers are not compatible with this
ignition system, we recommend that you confirm
the compatibility of yours before use.
(b) Check the idle speed.
Idle speed (w/ Cooling fan OFF):
750+50 rpm
If the idle speed is not as specified, check the IAC
system.
4. DISCONNECT TACHOMETER 3. INSPECT IDLE SPEED
(a) Race the engine at 2,500 rpm for approx. 90 seconds.
± 5S±FE ENGINEENGINE MECHANICALEG1±20

(c) Disconnect the following connectors:
(1) Igniter connector
(2) California only:
Ignition coil connector
(3) Noise filter connector
(4) 2 ground straps from LH fender apron
(5) Connector from LH fender apron 12. DISCONNECT WIRES AND CONNECTORS
(a) Remove the engine relay box, and disconnect the 5
connectors.
(b) Connector from LH fender apron
(6) Data link connector 1
(7) 2 ground straps from RH fender apron
(d) Disconnect the MAP sensor connector.
13. DISCONNECT HEATER HOSES
14. DISCONNECT FUEL RETURN HOSE
CAUTION: Catch leaking fuel in a container.
± 5S±FE ENGINEENGINE MECHANICALEG1±86

(d) Connect the following connectors:
(1) Igniter connector
(2) California only:
Ignition coil connector
(3) Noise filter connector
(4) 2 ground straps from LH fender apron
(5) Connector from LH fender apron 24. CONNECT WIRES AND CONNECTORS
(a) Connect the 5 connectors to the relay box.
(b) Connectors from LH fender apron.
(c) Install the engine relay box. 21. CONNECT FUEL INLET HOSE
Torque: 29 N±m (300 kgf±cm, 22 ft±lbf)
22. CONNECT FUEL RETURN HOSE
23. CONNECT HEATER HOSES
± 5S±FE ENGINEENGINE MECHANICALEG1±132

PRECAUTION
1. Before working on the fuel system, disconnect the
negative (±) terminal cable from the battery.
HINT: Any diagnostic trouble code retained by the
computer will be erased when the battery terminal is
removed.
Therefore, if necessary, read the diagnosis before
removing the terminal.
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned to the 'LOCK'
position and the negative (±) terminal cable is discon±
nected from the battery.
2. Do not smoke or work near an open flame when
working on the fuel system.
3. Keep gasoline away from rubber or leather parts.
3. IN EVENT OF ENGINE MISFIRE, FOLLOWING
PRECAUTIONS SHOULD BE TAKEN
(a) Check proper connection of battery terminals, etc.
(b) Handle high±tension cords carefully.
(c) After repair work, check that the ignition coil termi±
nals and all other ignition system lines are reconne±
cted securely.
(d) When cleaning the engine compartment, be especially
careful to protect the electrical system from water.
4. PRECAUTIONS WHEN HANDLING OXYGEN
SENSOR
(a) Do not allow oxygen sensor to drop or hit against an
object.
(b) Do not allow the sensor to come into contact with
water.
MAINTENANCE PRECAUTIONS
1. CHECK CORRECT ENGINE TUNE±UP
(See page EG1±8)
2. PRECAUTION WHEN CONNECTING GAUGE
(a) Use battery as the power source for the timing light,
tachometer, etc.
(b) Connect the tester probe of a tachometer to the termi±
nal IGE) of the data link connector 1.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±172

B. Inspect fuel pump operation
Connect the positive (+) lead from the battery terminal 4 of the
connector, and the negative (±) lead
to terminal 5. Check that the fuel pump operates.
NOTICE:
wThese tests must be performed quickly (within 10
seconds) to prevent the coil from burning out.
wKeep the fuel pump a: far away from the battery as
possible.
wAlways perform switching at the battery side.
If operation is not as specified, replace the fuel pump.
5. RECONNECT FUEL PUMP & SENDER GAUGE
CONNECTOR
6. INSTALL REAR SEAT CUSHION
7. CONNECT NEGATIVE (±) TERMINAL CABLE TO
BATTERY
FUEL PUMP INSPECTION
1. DISCONNECT NEGATIVE (±) TERMINAL CABLE
FROM BATTERY
CAUTION: Work must be started after 90 seconds from
the time the Ignition switch Is turned to the 'LOCK'
position and the negative (±) terminal cable is discon±
nected from the battery.
4. INSPECT FUEL PUMP
A. Inspect fuel pump resistance
Using an ohmmeter, measure the resistance between
terminals 4 and 5.
Resistance (Cold):
0.2±3.0 W
If the resistance is not as specified, replace the fuel
pump. 2. REMOVE REAR SEAT CUSHION
3. DISCONNECT FUEL PUMP & SENDER GAUGE CON±
NECTOR
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±181

2. CONNECT TACHOMETER TO ENGINE
Connect the test probe of a tachometer to terminal IG
(±) of the data link connector 1.
NOTICE:
wNEVER allow the tachometer terminal to touch
ground as it could result in damage to the igniter
and/or ignition coil.
wAs some tachometers are not compatible with this
ignition system, we recommend that you confirm
the compatibility of yours before use.
3. INSPECT FUEL CUT RPM
(a) Increase the engine speed to at least 2,500 rpm.
(b) Use a sound scope to check for injector operating
noise.
(c) Check that when the throttle lever is released, injector
operation noise stops momentarily and then resumes.
HINT: Measure with the A/C OFF.
Fuel return speed:
1,500 rpm
4. DISCONNECT TACHOMETER
FUEL CUT RPM
FUEL CUT RPM INSPECTION
1. WARM UP ENGINE
Allow the engine to warm up to normal operating
temperature.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±235

(1) Shift transmission into ªNº position or neutral.
(2) Warm up engine at normal operating temperature.
(3) Keep the engine speed at idle.
(4) Using SST, connect terminals TE1 and E1 of
data link connector 1.
SST 09843±18020
(5) Using a timing light, connect the tester to
No. 1 high±tension cord.(1) Shift transmission into ªNº position or neutral.
(2) Warm up engine at normal operating temperature.
(3) Switched off all accessories.
(4) Switched off air conditioning.
(5) Connect tachometer test probe to terminal
IG (±) of data link connector 1, and set the
tachometer to the 4±cylinder range.
wNEVER allow tachometer test probe to touch
ground as it could result in damage to igniter
and/or ignition coil.
wAs some tachometers are not compatible
with this ignition system, we recommended
that you confirm compatibility of your unit
before use.
Proceed to matrix chart of problem symptoms
on page EG1±327.
Proceed to page IG±19, 38* and continue
to troubleshoot.
Proceed to matrix chart of problem
symptoms on page EG1±327.
*Except California specification vehicles. Check ignition timing.
Check idle speed.
Check idle speed.
Idle speed: 700 ~ 800 rpm
Check ignition timing.
Ignition timing: 10
BTDC at idle
± 5S±FE ENGINEBASIC INSPECTIONEG1±311