2000 TOYOTA CAMRY Service Repair Manual

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Page 209 of 4770

TOYOTA CAMRY 2000 Service Repair Manual THREE±WAY CATALYTIC CONVERTER
REPLACEMENT
WU±TWC:
1. DISCONNECT NEGATIVE (±) TERMINAL CABLE
FROM BATTERY
CAUTION: Work must be started after 90 seconds from
the time the ignition switch is turned t

Page 210 of 4770

TOYOTA CAMRY 2000 Service Repair Manual (e) Remove the 3 bolts, 2 nuts, WU ±TWC, gasket, re±
tainer and cushion.
(f) Remove the 8 bolts and 2 heat insulators from the
WU ±TWC.
4. REINSTALL WARM±UP THREE±WAY
CATALYTIC CONVERTER
(a) I

Page 211 of 4770

TOYOTA CAMRY 2000 Service Repair Manual 5. REINSTALL FRONT EXHAUST PIPE
(a) Place 2 new gaskets on the front and rear of the front
exhaust pipe.
(b) Temporarily install the 2 bolts and 2 new nuts holding
the front exhaust pipe to the center

Page 212 of 4770

TOYOTA CAMRY 2000 Service Repair Manual TWC:
1. REMOVE FRONT EXHAUST PIPE (THREE ± WAY
CATALYTIC CONVERTER)
(a) Loosen the 2 bolts, and disconnect the bracket.
(b) Remove the 2 bolts and nuts holding the front exhaust
pipe to the center

Page 213 of 4770

TOYOTA CAMRY 2000 Service Repair Manual SERVICE SPECIFICATIONS
SERVICE DATA
Exhaust manifold stay x FR engine mounting insulator
TORQUE SPECIFICATIONS
No.1 exhaust manifold stay x Cylinder block
Front exhaust pipe x Center exhaust pipe No.1

Page 214 of 4770

TOYOTA CAMRY 2000 Service Repair Manual MFI/SFI SYSTEM
DESCRIPTION
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±164

Page 215 of 4770

TOYOTA CAMRY 2000 Service Repair Manual Except California (MFI System)
± 5S±FE ENGINEFE ENGINE ± MFI/SFI SYSTEMEG1±165

Page 216 of 4770

TOYOTA CAMRY 2000 Service Repair Manual ELECTRONIC CONTROL SYSTEM
The CAMRY 5S±FE engine is equipped with a TOYOTA Computer Controlled System (TCCS)
which centrally controls the MFI/SFI, ESA, IAC diagnosis systems etc. by means of an Engin

ELECTRONIC CONTROL SYSTEM
The CAMRY 5S±FE engine is equipped with a TOYOTA Computer Controlled System (TCCS)
which centrally controls the MFI/SFI, ESA, IAC diagnosis systems etc. by means of an Engine
Control Module (ECM±formerly MFI/SFI computer) employing a microcomputer.
The ECM controls the following functions:
1. Multiport Fuel Injection (MFI)/Sequential Multiport Fuel Injection (SFI)
The ECM receives signals from various sensors indicating changing engine operation conditions
such as:
Intake manifold pressure
Intake air temperature
Engine coolant temperature
Engine speed
Throttle valve opening angle
Exhaust oxygen content etc.
The signals are utilized by the ECM to determine the injection duration necessary for an optimum
air±fuel ratio.
2. Electronic Spark Advance (ESA)
The ECM is programmed with data for optimum ignition timing under all operating conditions.
Using data provided by sensors which monitor various engine functions (RPM, engine coolant
temperature, etc.), the microcomputer (ECM) triggers the spark at precisely the right instant.
3. Idle Air Control (IAC)
The ECM is programmed with target idling speed values to respond to different engine conditions
(engine coolant temperature, air conditioning ON/OFF, etc.). Sensors transmit signals to the ECM
which controls the flow of air through the bypass of the throttle valve and adjusts idle speed to
the target value.
4. Diagnosis
The ECM detects any malfunctions and abnormalities in the sensor network and lights a
malfunction indicator lamp in the combination meter. At the same time, trouble is identified and
a diagnostic trouble code is recorded by the EC
5. The diagnostic trouble code can be read by the
number of blinks of the malfunction indicator lamp when terminals TE1 and E1 are connected.
The diagnostic trouble codes are referred to in later page. (See page EG1±300)
Fail±Safe Function
In the event of the sensor malfunction, a back±up circuit will take over to provide minimal
driveability, and the malfunction indicator lamp will illuminate. The MFI (Multiport Fuel Injection)/SFI (Sequential Multiport Fuel Injection) system is composed
of 3 basic sub±systems: Fuel, Air Induction and Electronic Control Systems.
FUEL SYSTEM
Fuel is supplied under constant pressure to the MFI/SFI injectors by an electric fuel pump. The
injectors inject a metered quantity of fuel into the intake port in accordance with signals from the
ECM (Engine Control Module).
AIR INDUCTION SYSTEM
The air induction system provides sufficient air for engine operation.
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±166

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