2001 TOYOTA AVALON Service Repair Manual

SF102-02
A10518
5 mm
Hexagon
Wrench
P20115
SSTKnock Sensor 1
Knock Sensor 2
P01630
Ohmmeter
- SFIKNOCK SENSOR
SF-77
1186 Author
: Date
:
2001 AVALON (RM808U)
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. REMOVE AIR CLEANER HOSE WITH RESONATOR
3. REMOVE INTAKE MANIFOLD ASSEMBLY AND WA-
TER OUTLET (See page EM-31)
4. REMOVE KNOCK SENSORS
(a) Disconnect the knock sensor connector.
(b) Using SST, remove the knock sensor.
SST 09817-1601 1
5. INSPECT KNOCK SENSORS
Using an ohmmeter, check that there is no continuity between
the terminal and body.
If there is continuity, replace the sensor.
6. REINSTALL KNOCK SENSORS
(a) Using SST, install the knock sensor.
SST 09817-1601 1
Torque: 39 N´m (400 kgf´cm, 29 ft´lbf)
(b) Connect the knock sensor connector.
7. REINSTALL WATER OUTLET AND INTAKE MAN-
IFOLD ASSEMBLY (See page EM-59)
8. REINSTALL AIR CLEANER HOSE WITH RESONATOR
9. 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.

SF05X-05
B09084
MAF MeterMAF Meter Connector

O-Ring

Non-reusable part
- SFIMASS AIR FLOW (MAF) METER
SF-29
1138 Author
: Date
:
2001 AVALON (RM808U)
MASS AIR FLOW (MAF) METER
COMPONENTS

SF05Z-03
B06674
E2
THA
Ohmmeter
B06675AirVG E2G
Voltmeter
- SFIMASS AIR FLOW (MAF) METER
SF-31
1140 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
1. INSPECT MAF METER RESISTANCE
Using an ohmmeter, measure the resistance between terminals
THA and E2.
Resistance:
TerminalsResistanceTemperature
THA - E213.6 - 18.4 kW-20°C (-4°F)
THA - E22.21 - 2.69 kW20°C (68°F)
THA - E20.49 - 0.67 kW60°C (140°F)
If the resistance is not as specified, replace the MAF meter.
2. INSPECT MAF METER OPERATION
(a) Connect the MAF meter connector.
(b) Turn the ignition switch ON.
(c) Using a voltmeter, connect the positive (+) tester probe to
terminal VG, and negative (-) tester probe to terminal
E2G.
(d) Blow air into the MAF meter, and check that the voltage
fluctuates.
If operation is not as specified, replace the MAF meter.
(e) Turn the ignition switch LOCK.
(f) Disconnect the MAF meter connector.

SF060-01
SF-32
- SFIMASS AIR FLOW (MAF) METER
1141 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
Installation is in the reverse order of removal (See page SF-30).

SF05Y-05
B06723
SF-30
- SFIMASS AIR FLOW (MAF) METER
1139 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
REMOVE MAF METER
(a) Disconnect the MAF meter connector.
(b) Remove the 2 screws, MAF meter and O-ring.
HINT:
At the time of installation use a new O-ring.

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.

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.

S05054
New Gasket
FI1654
Fulcrum Length
30 cm
SST
FI6372
CORRECT New O-Ring
Delivery Pipe
Injector Grommet
WRONG
B05295
O-Ring
Grommet
Spacer InsulatorDelivery Pipe
O-Ring
- SFISFI SYSTEM
SF-3
111 2 Author
: Date
:
2001 AVALON (RM808U)
(b) When connecting the union bolt on the high pressure pipe
union, observe the following procedures:
(1) Always use 2 new gaskets.
(2) Tighten the union bolt by hand.
(3) Tighten the union bolt to the specified torque.
Torque: 29 N´m (300 kgf´cm, 21 ft´lbf)
(c) When connecting the flare nut on the high pressure pipe
union, observe the following procedures:
(1) Apply a light coat of engine oil to the flare nut, and
tighten the flare nut by hand.
(2) Using SST, tighten the flare nut to specified torque.
SST 09023-12700
NOTICE:
Do not rotate the fuel pipe, when tightening the flare nut.
Torque: 28 N´m (285 kgf´cm, 21 ft´lbf)
HINT:
Use a torque wrench with a fulcrum length of 30 cm (11.81 in.).
(d) Observe the following precautions when removing and
installing the injectors.
(1) Never reuse the O-ring.
(2) When placing a new O-ring on the injector, take
care not to damage it in any way.
(3) Coat a new O-ring with spindle oil or gasoline be-
fore installing-never use engine, gear or brake oil.
(e) Install the injector to the delivery pipe and intake manifold
as shown in the illustration.
(f) Observe these precautions when disconnecting the fuel
tube connector (quick type).
(1) Check if there is any dirt like mud on the pipe and
around the connector before disconnecting them
and clean the dirt away.
(2) Be sure to disconnect with hands.