TOYOTA CAMRY 2000 Service Repair Manual

4. REINSTALL TVV
(a) Apply adhesive to 2 or 3 threads of the TVV, and
install it.
Adhesive:
Part No. 08833±00070, THREE BOND 1324
or equivalent
Torque: 29 N±m (300 kgf±cm, 22 ft±lbf)
(b) Reconnect 2 vacuum hoses.
5. REFILL WITH ENGINE COOLANT
CHECK VALVE INSPECTION
INSPECT CHECK VALVE
(a) Check that air flows from the yellow port to the black
port.
(b) Check that air does not flow from the black port to the
yellow port.
If operation is not as specified, replace the check
valve.
TVV INSPECTION
1. DRAIN ENGINE COOLANT
2. REMOVE TVV FROM WATER INLET HOUSING
(a) Disconnect the following hoses:
(1) Vacuum hose (from throttle body)
(2) Vacuum hose (from charcoal canister)
(b) Remove the TVV.
3. INSPECT TVV OPERATION
(a) Cool the TVV to below 35C (95F) with cool water.
(b) Check that air does not flow from the upper port to
lower port.
(c) Heat the TVV to above 54C (129F) with hot water.
(d) Check that air flows from the upper port to lower port.
If operation is not as specified, replace the TVV.
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EXHAUST GAS RECIRCULATION (EGR) SYSTEM
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EGR SYSTEM INSPECTION
1. CHECK AND CLEAN FILTER IN EGR VACUUM
MODULATOR
(a) Check the filter for contamination or damage.
(b) Using compressed air, clean the filter.
HINT: Install the filter with the coarser surface facing
the atmospheric side (outward).
2. PREPARATION
Using a 3±way connector, connect a vacuum gauge
to the hose between the EGR valve and VSV.
3. CHECK SEATING OF EGR VALVE
Start the engine and check that the engine starts and
runs at idle.
6. CHECK VSV AND EGR VACUUM MODULATOR
WITH HOT ENGINE
(a) Warm up the engine.
(b) Check that the vacuum gauge indicates low vacuum
at 2,500 rpm. 5. CHECK VSV
(a) The engine coolant temperature should be below
60
C (140
F) (A/T) or 55
C (131
F) (M/T).
(b) Check that the vacuum gauge indicates zero at 2.500
rpm. 4. CONNECT TERMINALS TE1 AND E1
Using SST, connect terminals TE 1 and E 1 of the data
link connector 1.
SST 09843±18020
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VSV INSPECTION (California)
1. REMOVE VSV
(a) Disconnect the following connectors and hoses:
(1) VSV for EGR
(A) connector
(2) VSV for fuel pressure control
(B) connector
(3) Vacuum hose (from EGR valve) from port E of
VSV (A)
(4) Vacuum hose (from port ªaº of EGR vacuum
modulator) from port G of VSV (A)
(5) Vacuum hose (from fuel pressure regulator) from
port E of VSV (B)
(6) Vacuum hose (from air intake chamber) from port
G of VSV (B)
(b) Remove the bolt and VSV assembly. (c) Disconnect the vacuum hose port R of the EGR
vacuum modulator and connect port R directly to the
intake manifold with another hose.
(d) Check that the vacuum gauge indicates high vacuum
at 2,500 rpm.
HINT: As a large amount of exhaust gas enters, the
engine will misfire slightly.
(e) Remove the vacuum gauge, and reconnect the
vacuum hoses to the proper locations.
8. DISCONNECT TERMINALS TE1 AND E1
Remove the SST.
SST 09843±18020
IF NO PROBLEM IS FOUND WITH THIS
INSPECTION, SYSTEM IS NORMAL; OTHERWISE
INSPECT EACH PART 7. CHECK EGR VALVE
(a) Apply vacuum directly to the EGR valve with the
engine idling.
(b) Check that the engine runs rough or dies.
(c) Reconnect the vacuum hoses to the proper locations.
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VSV INSPECTION (Except California)
1. REMOVE VSV
(a) Disconnect the following connector and hoses:
(1) VSV connector
(2) Vacuum hose (from EGR valve) from port E of
VSV
(3) Vacuum hose (from port ªQº of EGR vacuum
modulator) from port G of VSV 2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter, check that there is continuity
between the terminals.
Resistance (Cold):
33±39

If there is no continuity, replace the VSV.
B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity
between each terminal and the body.
If there is continuity, replace the VSV.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from port E to the filter.
If operation is not as specified, replace the VSV.
3. REINSTALL VSVC. Inspect VSV operation
(a) Check that air flows from port E to port G.
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2. INSPECT VSV
A. Inspect VSV for open circuit
Using an ohmmeter, check that there is continuity
between the terminals.
Resistance (Cold):
33±39

If there is no continuity, replace the VSV.
B. Inspect VSV for ground
Using an ohmmeter, check that there is no continuity
between each terminal and the body.
If there is continuity, replace the VSV.
(b) Apply battery voltage across the terminals.
(c) Check that air flows from port E to the filter.
If operation is not as specified, replace the VSV.
3. REINSTALL VSV C. Inspect VSV operation
(a) Check that air flows from port E to port G. (b) Remove the bolt and VSV.
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EGR VALVE INSPECTION
1. REMOVE EGR VALVE
Check for sticking and heavy carbon deposits.
If a problem is found, replace the valve.
2. REINSTALL EGR VALVE WITH NEW GASKET
Nut
Torque: 13 N±m (130 kgf±cm, 9 ft±lbf)
Union nut
Torque: 59 N±m (600 kgf±cm, 43 ft±lbf)
EGR VACUUM MODULATOR INSPECTION
CHECK EGR VACUUM MODULATOR OPERATION
(a) Disconnect the vacuum hoses from ports P, Q and R
of the EGR vacuum modulator.
(b) Block ports P and R with your finger.
(c) Blow air into port Q, and check that the air passes
through to the air filter side freely.
(d) Start the engine, and maintain speed at 2.500 rpm.
(e) Repeat the above test. Check that there is a strong
resistance to air flow.
(f) Reconnect the vacuum hoses to the proper locations.
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EXHAUST PIPE ASSEMBLY INSPECTION
1. CHECK CONNECTIONS FOR LOOSENESS OR
DAMAGE
2. CHECK CLAMPS FOR WEAKNESS, CRACKS OR
DAMAGE
THREE±WAY CATALYTIC CONVERTER
INSPECTION
TWC:
CHECK FOR DENTS OR DAMAGE
If any part of protector is damaged or dented to the
extent that it contacts the TWC, repair or replace it.
To reduce C0, HC end NOx emissions, they are oxidized, reduced and converted to carbon dioxide (CO2), water (H20)
and nitrogen (N
2) by the catalyst.
THREE±WAY CATALYTIC CONVERTER (TWC) SYSTEM
Exhaust Port
Exhaust Gas WU±TWC
TWC
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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 to the 'LOCK'
position and the negative (±) terminal cable is discon±
nected from the battery.
2. REMOVE FRONT EXHAUST PIPE
(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 gaskets.HEAT INSULATOR INSPECTION
TWC:
1. CHECK HEAT INSULATOR FOR DAMAGE
2. CHECK FOR ADEQUATE CLEARANCE BETWEEN
THREE ± WAY CATALYTIC CONVERTER AND
HEAT INSULATOR
3. REMOVE WARM UP THREE ± WAY CATALYTIC
CONVERTER
(a) Check that the WU±TWC is cool.
(b) Disconnect the sub oxygen sensor connector.
(c) Remove the bolt, nut and No. 1 manifold stay.
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(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) Install the 2 heat insulators to a new WU ±TWC with
the 8 bolts.
(c) Install the WU±TWC with the 3 bolts and 2 new nuts.
Torque: 29 N±m (300 kgf±cm, 22 ft±lbf)
(b) Place new cushion, retainer and gasket on the WU±
TWC. (d) Remove the bolt, nut and manifold stay.
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