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 exhaust pipe.
(c) Using a 14 mm deep socket wrench, install the 3 new
nuts holding the front exhaust pipe to the WU ±TWC.
Torque: 62 N±m (630 kgf±cm, 46 ft±lbf)
(d) Tighten the 2 bolts and nuts holding the front exhaust
pipe to the center exhaust pipe.
Torque: 58 N±m (570 kgf±cm, 41 ft±lbf)
(e) Install the bracket with the 2 bolts.
6. CONNECT NEGATIVE (±) TERMINAL CABLE TO
BATTERY (e) Install the No. 1 manifold stay with the bolt and nut.
Torque: 42 N±m (425 kgf±cm. 31 ft±lbf)
(f) Connect the sub oxygen sensor connector. (d) Install the manifold stay with the bolt and nut.
Torque: 42 N±m (425 kgf±cm. 31 ft±lbf)
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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 exhaust pipe.
(c) Using a 14 mm deep socket wrench, remove the 3
nuts holding the front exhaust pipe to the WU±TWC.
(d) Remove the front exhaust pipe and gasket.
2. REINSTALL FRONT EXHAUST PIPE (THREE±WAY
CATALYTIC CONVERTER)
(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 exhaust pipe.
(c) Using a 14 mm deep socket wrench, install the 3 new
nuts holding the front exhaust pipe to the WU ±TWC.
Torque: 412 N±m (630 kgf±cm, 46 ft±lbf)
(d) Tighten the 2 bolts and nuts holding the front exhaust
pipe to the center exhaust pipe.
Torque: 58 N±m (570 kgf±cm, 41 ft±lbf)
(e) Install the bracket with the 2 bolts.
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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 exhaust manifold stay x WU±TWCExhaust manifold stay x WU±TWC
Front exhaust pipe x WU±TWC WU±TWC x Exhaust manifoldTVV x Water outlet housing
EGR valve x Intake manifold
EG R valve x EGR pipe VSV (for EGR)
Part tightened Resistance
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MFI/SFI SYSTEM
DESCRIPTION
± 5S±FE ENGINEMFI/SFI SYSTEMEG1±164

Except California (MFI System)
± 5S±FE ENGINEFE ENGINE ± MFI/SFI SYSTEMEG1±165

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.
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Fuel pumped up by the fuel pump, flows through the fuel filter and is distributed to each injector
at a set pressure maintained by the pressure regulator.
The fuel pressure regulator adjusts the pressure of the fuel from the fuel line (high pressure side)
to a pressure 284 kPa (2.9 kgf/cm
, 41 psi) higher than the pressure inside the cylinder head, and
excess fuel is returned to the fuel tank through the return pipe.
The pulsation damper absorbs the slight fluctuations in fuel pressure caused by fuel injector from
the injector.
The injectors operate on input of injection signals from the ECM and inject fuel into the cylinder
head.
OPERATION
FUEL SYSTEM
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Air is filtered through the air cleaner and the amount flowing to the air intake chamber is
determined according to the throttle valve opening in the throttle body and the engine speed.
Intake air controlled by the throttle valve opening is distributed from the air intake chamber to the
manifold of each cylinder and is drawn into the combustion chamber.
At low temperatures the IAC valve opens and the air flows through the IAC valve and the throttle
body, into the air intake chamber. During engine warming up, even if the throttle valve is
completely closed, air flows to the air intake chamber, thereby increasing the idle speed (first idle
operation).
The air intake chamber prevents pulsation of the intake air. It also prevents intake air interference
in each cylinder.
AIR INDUCTION SYSTEM
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The control system consists of sensors which detect various engine conditions, and a ECM which
determines the injection volume (timing) based on the signals from the sensors.
The various sensors detect the intake air pressure, engine speed, oxygen density in the exhaust
gas, engine coolant temperature, intake air temperature and atmospheric pressure etc. and
convert the information into an electrical signal which. is sent to the ECM. Based on these signals,
the ECM calculates the optimum ignition timing for the current conditions and operates the
injectors.
The ECM not only controls the fuel injection timing, but also the self diagnostic function which
records the occurrence of a malfunction, ignition timing control, idle speed control and EGR
control.
ELECTRONIC CONTROL SYSTEM
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PREPARATION
SST (SPECIAL SERVICE TOOLS)
(90405±09015) No.1 Union (09268±41090) No.7 union (09268±41080) No.6 union
09631±22020 Power Steering Hose Nut
14 x 17 mm Wrench Set
RECOMMENDED TOOLS
Plug for vacuum hose, fuel hose
etc. 09268±41045 Injection Measuring Tool Set
09082±00050 TOYOTA Electrical Tester Set 09842±30070 Wiring ªFº EFI Inspection 09268±45012 EFI Fuel Pressure Gauge
09843±18020 Diagnosis Check Wire
09200±00010 Engine Adjust Kit
09258±00030 Hose Plug SetFuel line flare nut
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