engine TOYOTA AVALON 2001 Service Repair Manual
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Page 1620 of 1897
B09076
Fuel Hose
Clamp
B09077
B09078
SST
SST
Retainer
No.1 Fuel
Fuel tube
Connector (Hose)
Pipe
SST
(Hose)SST
- SFIFUEL PUMP
SF-7
111 6 Author: Date:
2001 AVALON (RM808U)
(d) Remove the fuel hose clamp.
(e) Disconnect the No.1 fuel pipe (fuel tube connector) from
the fuel filter outlet.
CAUTION:
Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions (See page SF-1).
As there is retained pressure in the fuel pipe line, pre-
vent it from splashing inside the engine compart-
ment.
(f) Install SST (pressure gauge) as shown in the illustration
by using SST and fuel tube connector.
SST 09268-41047, 09268-45014
(g) Wipe off any splattered gasoline.
(h) Reconnect the TOYOTA hand-held tester to the DLC3
(See step 1).
(i) Reconnect the negative (-) terminal cable to the battery.
(j) Measure the fuel pressure.
Fuel pressure:
301 - 347 kPa (3.1 - 3.5 kgf/cm
2, 44 - 50 psi)
If pressure is high, replace the fuel pressure regulator.
If pressure is low, check these parts:
Fuel hoses and connections
Fuel pump
Fuel filter
Fuel pressure regulator
(k) Disconnect the TOYOTA hand- held tester from the
DLC3.
(l) Start the engine.
(m) Measure the fuel pressure at idle.
Fuel pressure:
301 - 347 kPa (3.1 - 3.5 kgf/cm
2, 44 - 50 psi)
(n) Stop the engine.
(o) Check that the fuel pressure remains as specified for 5
minutes after the engine has stopped.
Fuel pressure:
147 kPa (1.5 kgf/cm
2, 21 psi) or more
If pressure is not as specified, check the fuel pump, pressure
regulator and/or injectors.
Page 1630 of 1897
SF0ZW-01
A07285
E1DLC1
SST
TE1
DLC1
A07285
E1DLC1SST
TE1
DLC1
B06684
Disconnect
Plug
Plug
- SFIIDLE AIR CONTROL (IAC) VALVE
SF-43
1152 Author: Date:
2001 AVALON (RM808U)
IDLE AIR CONTROL (IAC) VALVE
ON-VEHICLE INSPECTION
1. INSPECT IAC VALVE OPERATION
(a) Initial conditions:
Engine at normal operating temperature
Idle speed checked correctly
Transmission in neutral position
A/C switch OFF
(b) Using SST, connect terminals TE1 and E1 of the
DLC1.
SST 09843-18020
(c) After engine speed is kept at approx. 1,000 rpm for 5 se-
conds, check that it returns to idle speed.
If the engine speed operation is not as specified, check the IAC
valve, wiring and ECM.
(d) Remove the SST from the DLC1.
SST 09843-18020
2. INSPECT AIR ASSIST SYSTEM
(a) Initial conditions:
Engine at normal operating temperature
Idle speed checked correctly
Transmission in neutral position
A/C switch OFF
(b) Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843-18020
(c) After engine speed is kept at 900 - 1,300 rpm for 10 se-
conds, check that it returns to idle speed.
(d) Stop the engine.
(e) Remove the V-bank cover.
(f) Disconnect the air assist hose from the air pipe, and block
off the IAC valve exit and the entry to the pipe.
(g) Start the engine and check that the idle speed reaches
500 rpm or below (the engine may stall).
If the idle does not reach 500 rpm or below, check for a leak be-
tween the air assist hoses, pipe and injectors.
(h) Remove the SST from the DLC1.
SST 09843-18020
(i) Reconnect the air assist hose to the air pipe.
(j) Reinstall the V-bank cover.
Page 1632 of 1897
SF073-04
B09080
PS Pressure Tube
19.5 (200, 14)39 (400, 19)
Throttle Position
Sensor Connector
Accelerator Cable
IAC Valve Connector
Water Bypass
Hose
Vacuum Hose
Gasket PCV Hose
Air Intake Chamber
Assembly
43 (440, 32)
Throttle Body Bracket
No.1 Engine
Hanger
Ground Cable
Ground Cable
Ground Strap
VSV Connector for No.2 ACIS Purge Hose
Air Assist Hose and Pipe
19.5 (200, 14)
Retainer
Injector Connector Delivery Pipe10 (100, 7)
Spacer
O-Ring
Grommet
Injector
Insulator
O-RingV-Bank Cover
Brake Booster
Vacuum HoseVSV Connector
for No.1 ACIS
VSV Connector
for EVAP
DLC1
Fuel Hose Clamp
Fuel Inlet Hose
N´m (kgf´cm, ft´lbf): Specified
Non-reusable partAir Cleaner Hose
w/ Resonator
Throttle Cable
SF-20
- SFIINJECTOR
1129 Author: Date:
2001 AVALON (RM808U)
COMPONENTS
Page 1633 of 1897
SF075-05
B09081
Fuel Tube Connector
SST
(Union)
InjectorSST
(Hose) SST
(Clamp)
Fuel Filter
(On Vehicle)
S05359
Fuel Tube Connector
B09082
SST
(Hose)Fuel Tube Connector
Fuel Filter
B06481
SST (Union)SST (Hose)
O-Ring
SST
(Clamp)
Vinyl Tube
A10838
TOYOTA Hand-Held Tester
DLC3
- SFIINJECTOR
SF-23
1132 Author: Date:
2001 AVALON (RM808U)
INSPECTION
1. INSPECT INJECTOR INJECTION
CAUTION:
Keep injector clear of sparks during the test.
(a) Purchase the new No.1 fuel pipe and take out the fuel
tube connector from its pipe.
Part No. 23801-20070
(b) Connect SST (hose) and fuel tube connector to the fuel
filter outlet.
SST 09268-41047
CAUTION:
Preform connecting operations of the fuel tube connector
(quick type) after observing the precautions (See page
SF-1).
HINT:
Use the vehicle fuel filter.
(c) Install the grommet and O-Ring to the injector.
(d) Connect SST (union and hose) to the injector, and hold
the injector and union with SST (clamp).
SST 09268-41047
(e) Put the injector into a graduated cylinder.
HINT:
Install a suitable vinyl hose onto the injector to prevent gasoline
from splashing out.
(f) Connect the TOYOTA hand-held tester to the DLC3.
(g) Turn the ignition switch ON and push the TOYOTA hand-
held tester main switch ON.
NOTICE:
Do not start the engine.
(h) Select the ACTIVE TEST mode on the TOYOTA hand-
held tester.
(i) Please refer to the TOYOTA hand-held tester operator's
manual for further details.
Page 1634 of 1897
B06483
SST
(Wire)
Battery
B06482
SF-24
- SFIINJECTOR
1133 Author: Date:
2001 AVALON (RM808U)
(j) If you have no TOYOTA hand-held tester, connect the
positive (+) and negative (-) leads from the battery to the
fuel pump connector (See page SF-6).
(k) Connect SST (wire) to the injector and battery for 15 se-
conds, and measure the injection volume with a gra-
duated cylinder. Test each injector 2 or 3 times.
SST 09842-30070
Volume: 60 - 73 cm
3 (3.4 - 4.5 cu in.) per 15 sec.
Difference between each injector:
13 cm
3 (0.8 cu in.) or less
If the injection volume is not as specified, replace the injector.
2. INSPECT LEAKAGE
(a) In the condition above, disconnect the test probes of SST
(wire) from the battery and check the fuel leakage from
the injector.
SST 09842-30070
Fuel drop: 1 drop or less per 12 minutes
(b) Turn the ignition switch OFF.
(c) Disconnect the negative (-) terminal cable from the bat-
tery.
(d) Remove the SST and fuel tube connector.
SST 09268-41047, 09842-30070
CAUTION:
Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions (See page SF-1).
As there is retained pressure in the fuel pipe line, pre-
vent it from splashing inside the engine compart-
ment.
(e) Disconnect the TOYOTA hand- held tester from the
DLC3.
Page 1637 of 1897
A10518
5 mm
Hexagon
Wrench
SF072-05
B06523
Sound Scope
B06522
Ohmmeter
- SFIINJECTOR
SF-19
1128 Author: Date:
2001 AVALON (RM808U)
INJECTOR
ON-VEHICLE INSPECTION
1. REMOVE V-BANK COVER
(a) Using a 5 mm hexagon wrench, remove the 3 cap nuts.
(b) Loosen the V-bank cover fastener counterclockwise.
(c) Remove the V-bank cover.
2. INSPECT INJECTOR OPERATION
Check operation sound from each injector.
(1) With the engine running or cranking, use a sound
scope to check that there is normal operating noise
in proportion to engine speed.
(2) If you have no sound scope, you can check the in-
jector operating vibration with your finger.
If no sound or unusual sound is heard, check the wiring connec-
tor, injector or injection signal from the ECM.
3. INSPECT INJECTOR RESISTANCE
(a) Disconnect the injector connector.
(b) Using an ohmmeter, measure the resistance between the
terminals.
Resistance: 13.4 - 14.2 W at 20°C (68°F)
If the resistance is not as specified, replace the injector.
(c) Reconnect the injector connector.
4. REINSTALL V-BANK COVER
(a) Using 5 mm hexagon wrench, install the V-bank cover
with the 3 cap nuts.
(b) Press down the V-bank cover fastener.
Page 1638 of 1897
SF0ZR-02
A10518
5 mm
Hexagon
Wrench
S04505
B06613
B09076
Fuel Hose
Clamp
B09077
- SFIINJECTOR
SF-21
1130 Author: Date:
2001 AVALON (RM808U)
REMOVAL
1. REMOVE V-BANK COVER
(a) Using a 5 mm hexagon wrench, remove the 3 cap nuts.
(b) Loosen the V-bank cover fastener counterclockwise.
(c) Remove the V-bank cover.
2. REMOVE AIR CLEANER HOSE WITH RESONATOR
3. REMOVE AIR INTAKE CHAMBER ASSEMBLY
(See page EM-31)
4. DISCONNECT INJECTOR CONNECTORS
5. REMOVE AIR ASSIST HOSES AND PIPE
6. DISCONNECT NO.1 FUEL PIPE
(a) Remove the fuel hose clamp.
(b) Disconnect the No.1 fuel pipe (fuel tube connector) from
the fuel filter outlet.
CAUTION:
Perform disconnecting operations of the fuel tube
connector (quick type) after observing the precau-
tions (See page SF-1).
As there is retained pressure in the fuel pipe line, pre-
vent it from splashing inside the engine compart-
ment.
Page 1640 of 1897
SF06S-03
B09135
Ground Cable
PCV Hose
Air Intake Chamber
Assembly
ECT Sensor
Connector ECT Sender
Gauge Connector
IAC Valve
Connector
VSV Connector for No.2 ACIS
Engine Coolant
Reservoir HoseThrottle Position
Sensor Connector Brake Booster
Vacuum Hose Throttle Body Bracket
Water Outlet PS Pressure Tube
19.5 (200, 14)
39 (400, 19)
15 (150, 11)
43 (440, 32)
Ground Strap
DLC1Gasket
15 (150, 11)
Grand Strap
Connector
Gasket
39 (400, 29)
V-Bank Cover
Accelerator CableAir Cleaner Hose
w/ Resonator
Purge Hose
Vacuum Hose
Fuel Hose
Clamp
Heater Hose
Intake Manifold Assembly
Injector Connector x 9
Knock Sensor
Connector
Upper Radiator
Hose
Gasket
: Specified torque
Non-reusable part
N´m (kgf´cm, ft´lbf)
Retainer
Knock Sensor
Water Bypass
Hose
VSV Connector for
EVAP
No.1 Engine
Hanger
VSV Connector
for No.1 ACIS
Throttle Cable
Ground Cable
SF-76
- SFIKNOCK SENSOR
1185 Author: Date:
2001 AVALON (RM808U)
KNOCK SENSOR
COMPONENTS
Page 1646 of 1897
SF0LC-03
- SFISFI SYSTEM
SF-1
111 0 Author: Date:
2001 AVALON (RM808U)
SFI SYSTEM
PRECAUTION
1. BEFORE WORKING ON FUEL SYSTEM, DISCON-
NECT NEGATIVE (-) TERMINAL CABLE FROM BAT-
TERY
HINT:
Any diagnostic trouble code retained by the computer will be
erased when the negative (-) terminal cable is removed from
the battery.
Therefore, if necessary, read the diagnosis before removing the
negative (-) terminal cable from the battery.
2. DO NOT SMOKE OR WORK NEAR AN OPEN FLAME
WHEN WORKING ON FUEL SYSTEM
3. KEEP GASOLINE AWAY FROM RUBBER OR LEATH-
ER PARTS
4. MAINTENANCE PRECAUTIONS
(a) In event of engine misfire, these precautions should be
taken.
(1) Check proper connection to battery terminals, etc.
(2) After repair work, check that the ignition coil termi-
nals and all other ignition system lines are recon-
nected securely.
(3) When cleaning the engine compartment, be espe-
cially careful to protect the electrical system from
water.
(b) Precautions when handling the oxygen sensor.
(1) Do not allow oxygen sensor to drop or hit against an
object.
(2) Do not allow the sensor to come into contact with
water.
5. IF VEHICLE IS EQUIPPED WITH A MOBILE RADIO
SYSTEM (HAM, CB, ETC.)
If the vehicle is equipped with a mobile communication system,
refer to the precaution in the IN section.
6. AIR INDUCTION SYSTEM
(a) Separation of the engine oil dipstick, oil filler cap, PCV
hose, etc. may cause the engine to run out of tune.
(b) Disconnection, looseness or cracks in the parts of the air
induction system between the throttle body and cylinder
head will allow air suction and cause the engine to run out
of tune.
7. ELECTRONIC CONTROL SYSTEM
(a) Before removing SFI wiring connectors, terminals, etc.,
first disconnect the power by either turning the ignition
switch to LOCK or disconnecting the negative (-) terminal
cable from the battery.
HINT:
Always check the diagnostic trouble code before disconnecting
the negative (-) terminal cable from the battery.
Page 1647 of 1897
FI2553
SST
S04600
Fuel
Pump
Connector
S05039
Plug
SF-2
- SFISFI SYSTEM
1111 Author: Date:
2001 AVALON (RM808U)
(b) When installing the battery, be especially careful not to in-
correctly connect the positive (+) and negative (-) cables.
(c) Do not permit parts to receive a severe impact during re-
moval or installation. Handle all SFI parts carefully, espe-
cially the ECM.
(d) Do not be careless during troubleshooting as there are
numerous transistor circuits and even slight terminal con-
tact can cause further troubles.
(e) Do not open the ECM cover.
(f) When inspecting during rainy weather, take care to pre-
vent entry of water. Also, when washing the engine
compartment, prevent water from getting on the SFI parts
and wiring connectors.
(g) Parts should be replaced as an assembly.
(h) Care is required when pulling out and inserting wiring con-
nectors.
(1) Release the lock and pull out the connector, pulling
on the connectors.
(2) Fully insert the connector and check that it is locked.
(i) Use SST for inspection or test of the injector or its wiring
connector.
SST 09842-30070
8. FUEL SYSTEM
(a) When disconnecting the high fuel pressure line, a large
amount of gasoline will spill out, so observe the following
procedures:
(1) Disconnect the fuel pump connector.
(2) Start the engine. After the engine has stopped on
its own, turn the ignition switch to LOCK.
(3) Put a container under the connection.
(4) Slowly loosen the connection.
(5) Disconnect the connection.
(6) Plug the connection with a rubber plug.