TOYOTA AVALON 2001 Service Repair Manual

SF0ZS-03
B09088

Gasket
Throttle Body
Water Bypass
HoseAir Assist
Hose
29 (300, 22)
19.5 (200, 14)
Air Cleaner Hose
w/ Resonator Vacuum Hose
Accelerator CableThrottle Body
Bracket
V-Bank Cover
IAC Valve
ConnectorThrottle
Position
Sensor
Connector
: Specified torque

Non-reusable part
N´m (kgf´cm, ft´lbf)
Vacuum Hose
Brake Booster
Vacuum Hose
Fuel Vapor
Feed Hose
Throttle Cable
SF-34
- SFITHROTTLE BODY
1143 Author
: Date
:
2001 AVALON (RM808U)
COMPONENTS

B09089
Protector

O-Ring
Throttle Position Sensor

Gasket

O-Ring
No.2 Throttle BodyNo.1 Throttle
Body
6.9 (70, 61 in.´lbf)

Gasket
IAC Valve
N´m (kgf´cm, ft´lbf)

Non-reusable part: Specified torque No.1 Intake Air Control Valve

Gasket
6.9 (70, 61 in.´lbf)
Bracket
- SFITHROTTLE BODY
SF-35
1144 Author
: Date
:
2001 AVALON (RM808U)

SF0ZU-02
B09094
Must Have
ClearanceMust Have
No Clearance
B05131
Close Side
Open Side
B05132
Fully Opening
Feeler
Gauge
(Close Side)
Adjust Screw SF-38
- SFITHROTTLE BODY
1147 Author
: Date
:
2001 AVALON (RM808U)
INSPECTION
NOTICE:
In case of changing, removing or installing the throttle
body or IAC valve, must do this.
1. INSPECT THROTTLE BODY
(a) Check that there is no clearance between each throttle
stop screw and the throttle lever when applying the vacu-
um (53.3 kPa (400 mmHg, 15.7 in.Hg)) to the throttle
opener using a MITYVAC (Hand-Held Vacuum Pump).
Standard: Must have no clearance
NOTICE:
As the throttle stop screw is precisely adjusted, so do not
adjust it.
(b) Under the condition of (1), check visually that there is a
clearance between each adjust screw and the throttle le-
ver on No.1 side.
Adjust screwReference value
Close sideAbout 0.13 mm (0.0051 in.)
Open sideAbout 0.22 mm (0.0087 in.)
(c) Measure the clearance between the adjust screw on the
close side when fully opening the throttle lever on No.2
side by hand and the throttle lever on No.1 side with a
feeler gauge.
Standard value: 0.25 - 0.45 mm (0.0098 - 0.0177 in.)
In case of being out of standard value, perform the ad-
justment of step 2.

B09116
Throttle Stop ScrewAdjust Screw
(Close Side)
Adjust Screw
(Open Side)
B05184
Close Side
Open Side
- SFITHROTTLE BODY
SF-39
1148 Author
: Date
:
2001 AVALON (RM808U)
2. ADJUST THROTTLE BODY (BALANCE)
NOTICE:
Do not adjust the throttle stop screw and throttle opener.
(a) Beforehand checking.
Recheck 1 - (a).
(b) Adjustment of the adjust screw on the open side.
(1) Using a 2 mm hexagon wrench, loosen the lock nut
and screw, make clearance between the screw tip
and the throttle lever on No.1 side.
(2) Turn the screw to the screw torque direction gradu-
ally, and stop it at the position where to touch the le-
ver at the very moment.
NOTICE:
If turning it too much to the torque direction, the No.1 lever
goes off from the throttle stop screw causing the adjust-
ment failure.
(3) Turn it back from the position where it touches the
lever to the screw loosing direction.
Standard: Turn it back by rotating 1/4
(4) Tighten the lock nut.
(c) Adjustment of the adjust screw on the close side.
(1) Loosen the lock nut and screw, and make clearance
between the screw tip and the throttle lever on No.1
side.
(2) Turn the screw to the screw torque direction gradu-
ally, and stop it at the position where to touch the le-
ver at the very moment.
NOTICE:
If turning it too much to the torque direction, the No.2 lever
goes off from the throttle stop screw causing the adjust-
ment failure.
(3) Turn it back from the position where it touches the
lever to the screw loosing direction.
Standard: Turn it back by rotating 1/2 - 3/4
(4) Tighten the lock nut.
(d) Completion checking.
Check 1 - (c).

SF065-03
SF-42
- SFITHROTTLE BODY
1151 Author
: Date
:
2001 AVALON (RM808U)
INSTALLATION
Installation is in the reverse order of removal (See page SF-36).

B09085
SF061-03
B09086
VTA
E2
VCOhmmeter
Vacuum
B09087
Plug
Disconnect
- SFITHROTTLE BODY
SF-33
1142 Author
: Date
:
2001 AVALON (RM808U)
THROTTLE BODY
ON-VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
Check that the throttle linkage moves smoothly.
2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the sensor connector.
(b) Disconnect the vacuum hose from the throttle body.
(c) Apply vacuum to the throttle opener.
(d) Using an ohmmeter, measure the resistance between
each terminal.
Resistance:
Throttle valve
conditionBetween
terminalsResistance
Fully closedVTA - E20.2 - 6.3 kW
Fully openVTA - E22.0 - 10.2 kW
-VC - E22.5 - 5.9 kW
(e) Reconnect the vacuum hose to the throttle body.
3. INSPECT THROTTLE OPENER
(a) Allow the engine to warm up to normal operating tempera-
ture.
(b) Check idle speed.
Idle speed: 650 ± 50 rpm
(c) Disconnect the vacuum hose from the throttle opener,
and plug the hose end.
(d) Check the throttle opener setting speed.
Throttle opener setting speed: 1,100 - 1,700 rpm
If the throttle opener setting is not as specified, replace the
throttle body.
(e) Stop the engine.
(f) Reconnect the vacuum hose to the throttle opener.
(g) Start the engine and check that the idle speed returns to
the correct speed.

SF0ZT-02
A10518
5 mm
Hexagon
Wrench
B09090
B09091(d)
(b)
(c)
(e)
B09092
(j)(g)
(h) (f)
(k) (i)
SF-36
- SFITHROTTLE BODY
1145 Author
: Date
:
2001 AVALON (RM808U)
REMOVAL
1. DRAIN ENGINE COOLANT
2. REMOVE V-BANK COVER
(a) Using a 5 mm hexagon wrench, remove the 3 cap nuts.
(b) Loosen the V-bank cover fastener counterclockwise.
HINT:
At the time of installation, please refer to the following items.
Press down the V-bank cover fastener.
(c) Remove the V-bank cover.
3. REMOVE AIR CLEANER HOSE WITH RESONATOR
(a) Disconnect the PCV hose.
(b) Disconnect the vacuum hose (from the VSV for the active
engine control mount).
(c) Loosen the 3 hose clamps, and remove the air cleaner
hose with the resonator.
4. DISCONNECT ACCELERATOR CABLE AND
THROTTLE CABLE
5. REMOVE THROTTLE BODY
(a) Remove the bolt holding the throttle body to the throttle
body bracket.
Torque: 19.5 N´m (200 kgf´cm, 14 ft´lbf)
(b) Disconnect the throttle position sensor connector.
(c) Disconnect the IAC valve connector.
(d) Disconnect the wire clamp.
(e) Disconnect the brake booster vacuum hose.
(f) Disconnect the water bypass hose (from the intake man-
ifold).
(g) Disconnect the water bypass hose (from the water inlet
housing).
(h) Disconnect the air assist hose.
(i) Disconnect the fuel vapor feed hose (from the emission
control valve set).
(j) Disconnect the vacuum hose (from the No.1 ACIS VSV).
(k) Disconnect the vacuum hose (from the vacuum tank for
the ACIS).

B09093
- SFITHROTTLE BODY
SF-37
1146 Author
: Date
:
2001 AVALON (RM808U)
(l) Remove the 3 nuts, throttle body and gasket.
HINT:
At the time of installation, please refer to the following items.
Place a new gasket on the air intake chamber.
Torque: 29 N´m (300 kgf´cm, 22 ft´lbf)

SF16B-01
B06510
B06507
B06512
B06513
SF-40
- SFITHROTTLE BODY
1149 Author
: Date
:
2001 AVALON (RM808U)
REPLACEMENT
NOTICE:

Do not give a shock to the throttle position senor.

Do not disassemble or adjust the throttle opener.
1. REPLACE THROTTLE POTION SENSOR
(a) Remove the 2 screws and throttle position sensor.
(b) Reinstall a new throttle position sensor.
(1) Check that the throttle valve is fully close.
(2) Insert the sensor to the throttle body with it turned
counterclockwise by 30° to 60° against the fully-
close valve position.
(3) By turning the sensor clockwise, tighten the 2
screws.
2. REPLACE IAC VALVE
(a) Remove the 4 screws, bracket, IAC valve and gasket.
(b) Place a new gasket on the No.1 throttle body.
(c) Reinstall a new IAC valve with the 4 screws and bracket.
3. REPLACE THROTTLE BODIES
(a) Remove the 2 screws and protector.

B09117
B05128
New
Gasket
New
O-RingNew
Gasket
New
O-Ring
B09117
- SFITHROTTLE BODY
SF-41
1150 Author
: Date
:
2001 AVALON (RM808U)
(b) Remove the 6 screws, No.1 throttle body, No.2 throttle
body and 2 gaskets from the No.1 intake air control valve.
(c) Place 2 new gaskets and 2 new O-rings as shown in the
illustration.
(d) Reinstall a new No.1 throttle body and No.2 throttle body
with the 6 screws.
Torque: 6.9 N´m (70 kgf´cm, 61 in.´lbf)