Page 1793 of 5135
CloseOpen
Valve
Valve
B09650
± ENGINE CONTROL SYSTEMSFI SYSTEM (1AZ±FE)
10±19
AVENSIS REPAIR MANUAL (RM1018E)
3. INSPECT IDLE AIR CONTROL VALVE
NOTICE:
It is impossible to check the resister value and the op-
eration of ISCV by itself, because the ISCV has an IC
circuit inside it, which transforms the duty signal
from the ECM to the derive signal.
After checking, erase the DTC.
Clear the DTC after inspection.
HINT:
When the ISCV system has malfunctions except for its adher-
ence, DTC P0511 is detected.
(a) Operation inspection.
(1) Connect the ISC valve connector to the ISC valve.
(2) Check the ISC valve movement when the ignition
switch is turned ON.
Movement:
Half open fully close fully open half open
HINT:
ISC valve moves within 0.5 second.
Page 1794 of 5135
100FF±01
A78505
A78502
A78506
Upper
3030
± ENGINE CONTROL SYSTEMKNOCK SENSOR (1ZZ±FE/3ZZ±FE)
10±17
AVENSIS REPAIR MANUAL (RM1018E)
KNOCK SENSOR (1ZZ±FE/3ZZ±FE)
REPLACEMENT
1. REMOVE ENGINE UNDER COVER SUB±ASSY NO.1
(a) Remove the 5 clips, 2 screws and bolt, and then remove
the engine under cover.
2. REMOVE KNOCK SENSOR
(a) Disconnect the knock sensor connector.
(b) Remove the nut, and then remove the knock sensor.
3. INSTALL KNOCK SENSOR
(a) Install the knock sensor with the nut as shown in the il-
lustration.
Torque: 20 Nm (204 kgfcm, 15 ftlbf)
(b) Connect the knock sensor connector.
4. INSTALL ENGINE UNDER COVER SUB±ASSY NO.1
Page 1795 of 5135

100FE±01
A78497
A78498
(a)
(b)
(c)
A78499
(d)
(e)
A78500
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY(3ZZ±FE)
10±15
AVENSIS REPAIR MANUAL (RM1018E)
Removal & Installation and Disassembly & Reassembly
1.REMOVE RADIATOR SUPPORT OPENING COVER (See page 10±9)
2.REMOVE ENGINE ROOM COVER SIDE (See page 10±9)
3.DRAIN ENGINE COOLANT (See page 16±7)
4.REMOVE CYLINDER HEAD COVER NO.2 (See page 10±9)
5.REMOVE AIR CLEANER CAP SUB±ASSY (See page 10±9)
6. SEPARATE ACCELERATOR CONTROL CABLE ASSY
(a) Loosen the nut and separate the accelerator controlcable.
7. REMOVE THROTTLE BODY ASSY
(a) Disconnect the ventilation hose.
(b) Disconnect the water by±pass hose.
(c) Disconnect the water by±pass hose No. 2.
(d) Disconnect the throttle position sensor.
(e) Disconnect the ISC valve connector.
(f) Remove the bolt and 2 nuts, and then remove the acceler- ator control bracket and the throttle body.
(g) Remove the gasket from the intake manifold.
8. REMOVE ISC VALVE
(a) Remove the 4 screws, and then remove the ISC valve.
(b) Remove the gasket from the throttle body.
Page 1796 of 5135

A78501
A78503
30 to 45
A78469
66.3 mm
(2.610 in.)
Rotation
Center of
Throttle Link
11
10±16
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY(3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
9.REMOVE THROTTLE POSITION SENSOR
(a)Remove the 2 screws, and then remove the throttle posi- tion sensor.
10.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)
11.INSTALL ISC VALVE
(a)Install a new gasket to the throttle body.
(b)Install the ISC valve with the 4 screws.
Torque: 3.7 N m (38 kgf cm, 33 in. lbf)
12.INSTALL THROTTLE BODY ASSY
(a)Install a new gasket to the intake manifold.
(b)Install the throttle body and the accelerator control brack- et with the bolt and 2 nuts.
Torque: 30 N m (306 kgf cm, 22 ft lbf)
13.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)
14.INSTALL AIR CLEANER CAP SUB±ASSY (See page 10±9)
15.INSTALL CYLINDER HEAD COVER NO.2 (See page 10±9)
16.ADD ENGINE COOLANT (See page 16±7)
17.CHECK FOR ENGINE COOLANT LEAKS (See page 16±1)
18. INSTALL ENGINE ROOM COVER SIDE
19. INSTALL RADIATOR SUPPORT OPENING COVER
Page 1797 of 5135
100FD±01
A78454
N´m (kgf´cm, ft´lbf) : Specified torqueClip
Cylinder Head Cover No.2
Fuel
Vapor Feed Hose No.1
VSV
Connector
Mass Air Flow
Meter Connector Accelerator Control
Cable Assy
Fuel Vapor Feed Hose
No.3 Engine Room Cover Side
Radiator Support Opening Cover
Clip
Retainer
7.0 (71, 62 in.´lbf)
Clip
1.5 (15, 13 in.´lbf)
13 (129, 9)
Air Cleaner Cap
Sub±assy
x2
x4
± ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY (3ZZ±FE)
10±13
AVENSIS REPAIR MANUAL (RM1018E)
THROTTLE BODY ASSY (3ZZ±FE)
COMPONENTS
Page 1798 of 5135
A78504
Throttle Body Gasket
Non±reusable part
N´m (kgf´cm, ft´lbf) : Specified torqueISC Valve Throttle Body Cover
GasketThrottle Position
SensorWater By±pass
Hose Water By±pass
Hose No.2
ISC Valve ConnectorThrottle 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 SYSTEMTHROTTLE BODY ASSY (3ZZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
Page 1799 of 5135
100FC±01
A784575 Claws
A78458
A78459
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY(1ZZ±FE)
10±9
AVENSIS REPAIR MANUAL (RM1018E)
Removal & Installation and Disassembly & Reassembly
1.REMOVE RADIATOR SUPPORT OPENING COVER
(a)Remove the retainer and 4 clips.
(b)Unfasten the 5 claws and remove the radiator support
opening cover.
2.REMOVE ENGINE ROOM COVER SIDE
(a)Remove the 2 clips, and then remove the engine room cover side.
3.DRAIN ENGINE COOLANT (See page 16±7)
4. REMOVE CYLINDER HEAD COVER NO.2
(a) Remove the 2 nuts and 2 clips, and then remove the cylin- der head cover No. 2.
Page 1800 of 5135

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 SYSTEMTHROTTLE 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.