sensor TOYOTA AVENSIS 2003 Service Manual Online

A60621
3ZZ±FE: 1ZZ±FE:Throttle Stop Screw
Throttle Lever
Throttle Stop Screw
Throttle Lever
No clearance
No clearance
A60551
VTA E2VC
10±4
±
ENGINE CONTROL SYSTEM SFI SYSTEM (1ZZ±FE/3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
3. INSPECT THROTTLE BODY ASSY
(a) Check throttle body. (1) Check that throttle valve shaft is not rickety.
(2) Check that each port is not stopped up.
(3) Check that throttle valve opens and closes smooth-
ly.
(4) Check that there is no clearance between the
throttle stop screw and throttle lever at the throttle
closed position.
NOTICE:
Do not adjust the throttle stop screw.
4. INSPECT THROTTLE POSITION SENSOR
(a) Resistance inspection. (1) Disconnect the throttle position sensor connector.
(2) Using an ohmmeter, measure the resistance be-tween terminals 1 (VC) and 2 (E2).
Resistance: 2.5 to 6.0 k

(3) Check the variation resistance between terminals 3 (VTA) and 2 (E2).
Variation in resistance:
The resistance value increases in proportion to the
throttle lever opening value.
HINT:
Throttle valveResistance
Fully open0.2 to 5.7 k

Fully close2.0 to 10.2 k

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A60552
30
20
105
3
2
1
0.5
0.3
0.2
0.1
RESISTANCE k
±20 0 20 40 60 80 100 (±4)
TEMPERATURE
C(
F)
(32) (68) (104)(140)(176)(212)
A65174
Ohmmeter
A60553
±
ENGINE CONTROL SYSTEM SFI SYSTEM (1ZZ±FE/3ZZ±FE)
10±5
AVENSIS REPAIR MANUAL (RM1018E)
5. INSPECT ENGINE COOLANT TEMPERA TURE
SENSOR
(a) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-tween terminals.
Resistance:
2.32 to 2.59 k at 20
C (68
F)
0.310 to 0.326 k at 80
C (176
F)
NOTICE:
In case of checking the water temperature sensor in the wa-
ter, be careful not to allow water to go into the terminals,
and after checking, wipe out the sensor.
6. INSPECT KNOCK SENSOR
(a) Using an ohmmeter, measure the resistance between ter- minals.
Resistance: 120 to 280 k at 20
C (68
F)
HINT:
If the resistance is not specified, replace the sensor.
7. INSPECT EFI RELAY
(a) Inspect the relay continuity. (1) Using an ohmmeter, check that there is continuity
between terminals 1 and 2.
Specified condition: Continuity
(2) Check that there is no continuity between terminals 3 and 5.
Specified condition: No continuity
(b) Inspect the relay operation. (1) Apply battery voltage across terminals 1 and 2.
(2) Using an ohmmeter, check that there is continuitybetween terminals 3 and 5.
Specified condition: Continuity
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A77871
Non±reusable part
N´m (kgf´cm, ft´lbf) : Specified torque ISC Valve

ISC Valve Gasket
Fuel Vapor Feed HoseThrottle Position Sensor
Accelerator Control Cable
Assy
Throttle Body Gasket
Water By±pass Hose No. 2Water By±pass Hose Fuel Tube Sub±assy
Fuel Pipe Support
Throttle Position Sensor
Connector
ISC Valve Connector
13 (129, 9)30 (306, 22)
Throttle Body Assy
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY (1AZ±FE)
10±25
AVENSIS REPAIR MANUAL (RM1018E)
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A77875
(a)
(b)
(c)
(d)
(e)
A81619
A77876
A77877
A77878
10±28
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
7. REMOVE THROTTLE BODY ASSY
(a) Disconnect the throttle position sensor connector.
(b) Disconnect the ISC valve connector.
(c) Disconnect the water by±pass hose No. 2.
(d) Disconnect the water by±pass hose.
(e) Remove the fuel tube from the fuel pipe support.
(f) Remove the 3 bolts, and then remove the fuel pipe sup- port and the throttle body.
(g) Remove the gasket from the intake manifold.
8. REMOVE FUEL VAPOR FEED HOSE NO.2
(a) Remove the fuel vapor feed hose No. 2 from the throttle body.
9. REMOVE ISC VALVE
(a) Remove the 3 screws, and then remove the ISC valve.
(b) Remove the gasket from the throttle body.
10. REMOVE THROTTLE POSITION SENSOR
(a) Remove the 2 screws, and then remove the throttle posi- tion sensor.
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A77879
45

A77880
83.8 mm
(3.299 in.)
Rotation
Center of
Throttle Link
±
ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY(1AZ±FE)
10±29
AVENSIS REPAIR MANUAL (RM1018E)
11.INSTALL THROTTLE POSITION SENSOR
(a)Make sure that throttle valve is fully closed.
(b)With the throttle position sensor rotated 45
counter-
clockwise about the fully closed position of the throttle
valve, install the throttle position sensor to the throttle
body.
(c)Rotate the throttle position sensor clockwise and secure
it with the 2 screws.
12.INSTALL ISC VALVE
(a)Install a new gasket to the throttle body.
(b)Install the ISC valve with the 3 screws.
13.INSTALL FUEL VAPOR FEED HOSE NO.2
14.INSTALL THROTTLE BODY ASSY
(a)Install a new gasket to the intake manifold.
(b)Install the throttle body and the fuel pipe support with the 3 bolts.
Torque: 30 N
m (306 kgf
cm, 22 ft
lbf)
(c)Install the fuel tube to the fuel pipe support.
(d)Connect the water by±pass hose.
(e)Connect the water by±pass hose No. 2.
(f)Connect the ISC valve connector.
(g)Connect the throttle position sensor connector.
15.INSTALL ACCELERATOR CONTROL CABLE ASSY
(a)Instal the accelerator control cable as shown in the il- lustration.
Torque: 13 N
m (129 kgf
cm, 9 ft
lbf)
16.INSTALL AIR CLEANER CAP SUB±ASSY
17.INSTALL ENGINE COVER SUB±ASSY NO.1 Torque: 7.0 N
m (71 kgf
cm, 62 in.
lbf)
18.ADD ENGINE COOLANT (See page 16±19)
19.CHECK FOR ENGINE COOLANT LEAKS (See page 16±13)
20. INSTALL ENGINE ROOM COVER SIDE
21. INSTALL RADIATOR SUPPORT OPENING COVER
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A78455

Throttle Body Gasket

Non±reusable part
N´m (kgf´cm, ft´lbf) : Specified torque ISC Valve


Throttle Body Cover Gasket
Accelerator
Control Cable Bracket
Throttle Position
SensorWater By±pass
Hose
Water By±pass
Hose No.2
Throttle Body Bracket
ISC Valve Connector Throttle Body Assy
M/T:
Manifold Stay No.2 Ventilation Hose
Throttle Position
Sensor Connector
13 (133, 10)
30 (306, 22)
30 (306, 22)
3.7 (38, 33 in.´lbf)
2.0 (20, 18 in.´lbf)
13 (133, 10)
x3
x2
x2
x2
10±8
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY (1ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
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A78460
(a)
(b)(c)
(c)
(d)
(e)
(f)
(g)
(h)
Air Cleaner clamp
A78461
A78462
(a)
(b)
(c)
A78463
(d)
(e)
(M/T)
10±10
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY (1ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
5. REMOVE AIR CLEANER CAP SUB±ASSY
(a) Disconnect the mass air flow meter connector.
(b) Disconnect the VSV connector.
(c) Remove the 2 wire harness clamps.
(d) Disconnect the fuel vapor feed hose No. 1.
(e) Disconnect the fuel vapor feed hose No. 3.
(f) Remove the accelerator control cable from the accelera- tor control cable support No. 2.
(g) Loosen the hose clamp.
(h) Raise the air cleaner clamp up, slide it to the air cleaner cap.
(i) Remove the air cleaner cap together with the air cleaner
hose No. 1.
6. SEPARATE ACCELERATOR CONTROL CABLE ASSY
(a) Loosen the nut and separate the accelerator control cable.
7. REMOVE THROTTLE BODY ASSY
(a) Disconnect the water by±pass hose.
(b) Disconnect the water by±pass hose No. 2.
(c) Disconnect the ventilation hose.
(d) Disconnect the throttle position sensor connector.
(e) Disconnect the ISC valve connector.
(f) Remove the 3 bolts and 2 nuts, and then remove the throttle body bracket and the throttle body. (A/T)
(g) Remove the 5 bolts and 2 nuts, and then remove the throttle body bracket and the throttle body. (M/T)
(h) Remove the gasket from the intake manifold.
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A78464
A78465
A78466
A78467
30
to 45

±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY (1ZZ±FE)
10±11
AVENSIS REPAIR MANUAL (RM1018E)
8. REMOVE ACCELERATOR CONTROL CABLE
BRACKET
(a) Remove the 2 bolts, and then remove the accelerator
control cable bracket.
9. REMOVE ISC VALVE
(a) Remove the 3 screws, and then remove the ISC valve.
(b) Remove the gasket from the throttle body.
10. REMOVE THROTTLE POSITION SENSOR
(a) Remove the 2 screws, and then remove the throttle posi- tion sensor.
11. INSTALL THROTTLE POSITION SENSOR
(a) Make sure that the throttle valve is fully closed.
(b) With the throttle position sensor rotated 30
to 45
coun-
terclockwise about the fully closed position of the throttle
valve, install the throttle position sensor to the throttle
body.
(c) Rotate the throttle position sensor clockwise and secure it with the 2 screws.
Torque: 2.0 N
m (20 kgf
cm, 18 in.
lbf)
12. INSTALL ISC VALVE
(a) Install a new gasket to the throttle body.
(b) Install the ISC valve with the 3 screws. Torque: 3.7 N
m (38 kgf
cm, 33 in.
lbf)
13. INSTALL ACCELERATOR CONTROL CABLE BRACKET
Torque: 13 N
m (133 kgf
cm, 10 ft
lbf)
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A78463
A
A
A
A
BB
A
(d)
(c)
A78468
65.1 mm
(2.563 in.)
Rotation
Center of
Throttle Link
18

10±12
±
ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY(1ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
14.INSTALL THROTTLE BODY ASSY
(a)Install a new gasket to the intake manifold.
(b)Install the throttle body and the throttle body bracket with the 3 bolts and 2 nuts. (A/T)
Torque:
30 N
m (306 kgf
cm, 22 ft
lbf) for bolt and nut A
(c)Install the throttle body and the throttle body bracket with
the 5 bolts and 2 nuts. (M/T)
Torque:
30 N
m (306 kgf
cm, 22 ft
lbf) for bolt and nut A
13 N
m (133 kgf
cm, 10 ft
lbf) for bolt B
(d)Connect the ISC valve connector.
(e)Connect the throttle position sensor connector.
(f)Connect the ventilation hose.
(g)Connect the water by±pass hose No. 2.
(h)Connect the water by±pass hose.
15.INSTALL ACCELERATOR CONTROL CABLE ASSY
(a)Install the accelerator control cable as shown in the il-
lustration.
Torque: 13 N
m (129 kgf
cm, 9 ft
lbf)
16.INSTALL AIR CLEANER CAP SUB±ASSY Torque: 1.5 N
m (15 kgf
cm, 13 in.
lbf)
17.INSTALL CYLINDER HEAD COVER NO.2 Torque: 7.0 N
m (71 kgf
cm, 62 in.
lbf)
18.ADD ENGINE COOLANT (See page 16±7)
19.CHECK FOR ENGINE COOLANT LEAKS (See page 16±1)
20. INSTALL ENGINE ROOM COVER SIDE
21. INSTALL RADIATOR SUPPORT OPENING COVER
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A78504

Throttle Body Gasket

Non±reusable part
N´m (kgf´cm, ft´lbf) : Specified torque ISC Valve


Throttle Body Cover
Gasket Throttle Position
SensorWater By±pass
Hose
Water By±pass
Hose No.2
ISC Valve Connector Throttle Body Assy
Ventilation Hose
Throttle Position
Sensor Connector
30 (306, 22)
30 (306, 22)
Accelerator
Control Cable Bracket
3.7 (38, 33 in.´lbf)
2.0 (20, 18 in.´lbf)
x2
x2
x4
10±14
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY (3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
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