Page 1785 of 5135
A77879
45
A77880
83.8 mm
(3.299 in.)
Rotation
Center of
Throttle Link
±
ENGINE CONTROL SYSTEM THROTTLE 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
Page 1786 of 5135
100FG±01
A77870
Mass Air Flow
Meter Connector
N´m (kgf´cm, ft´lbf) : Specified torqueEngine Cover Sub±assy
No. 1
7.0 (71, 62 in.lbf)
Fuel Vapor Feed Hose
No. 2
Air Cleaner Cap
Sub±assyVSV
Connector Fuel Vapor Feed Hose
Clip
Engine Room Cover Side
Radiator Support Opening Cover
Clip
Retainer
x2
x4 10±24
± ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
THROTTLE BODY ASSY (1AZ±FE)
COMPONENTS
Page 1787 of 5135
A77871 Non±reusable part
N´m (kgf´cm, ft´lbf) : Specified torqueISC 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 HoseFuel Tube Sub±assy Fuel Pipe Support Throttle Position Sensor
Connector ISC Valve Connector
13 (129, 9)30 (306, 22)
Throttle Body Assy
± ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY (1AZ±FE)
10±25
AVENSIS REPAIR MANUAL (RM1018E)
Page 1788 of 5135
100G7±02
321 4 5
±20
020 40 60
80100 0.1 0.2 0.3 0.51 235 1020 30
TEMPERATUREC(F)
RESISTANCE k
(±4) (32) (80) (140)(104) (212)(176)
Air
E2
THAVG
E2G+B
A50378
12
Valve
A50377
B09641
10±20
± ENGINE CONTROL SYSTEMSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
INSPECTION
1. INSPECT MASS AIR FLOW METER
(a) Output voltage inspection.
(1) Apply battery voltage across terminals 1 (+B) and 2
(E2G).
(2) Using a voltmeter, connect the positive (+) tester
probe to terminal 3 (VG), and negative (±) tester
probe to terminal 2 (E2G).
(3) Blow air into the MAF meter, and check that the volt-
age fluctuates.
(b) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-
tween terminals 4 (THA) and 5 (E2).
Resistance:
TerminalsResistanceTemperature
THA ± E213.6 to 18.4 k±20 C (±4 F)
THA ± E22.21 to 2.69 k20 C (68 F)
THA ± E20.49 to 0.67 k60 C (140 F)
2. INSPECT CAMSHAFT TIMING OIL CONTROL VALVE
ASSY
(a) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-
tween the terminals.
Resistance: 6.9 to 7.9 at 20 C (68 F)
(b) Movement inspection.
(1) Connect the positive (+) lead from the battery to ter-
minal 1 and negative (±) lead to terminal 2, and
check the movement of the valve.
NOTICE:
Confirm the valve does not adhere.
HINT:
Bad returning of the valve by entrance of foreign objects causes
subtle pressure leak to the advanced direction. Then, DTC can
be detected.
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 when the
closed throttle position.
Page 1789 of 5135
VTA E2 VC
A35493
± ENGINE CONTROL SYSTEMSFI SYSTEM (1AZ±FE)
10±21
AVENSIS REPAIR MANUAL (RM1018E)
(b) Adjust the throttle stop screw.
NOTICE:
The throttle stop screw adjusting is very, so adjust it only
when the adjusting is really needed.
(1) Loosen the locknut and loosen the screw until it de-
taches the lever.
(2) Confirm that the throttle vale is fully closed.
(3) After the screw touches the lever, tighten it by 1/4
revolution additionally and tighten the lock nut.
(4) Seal the lock nut with yellow paint.
(5) Check that the throttle position sensor operates
normally.
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 VC and E2.
Resistance: 2.5 to 5.0 k
(3) Check the change of resistance between terminals
VTA and E2.
Change of resistance:
The resistance value increases in proportion to the
throttle lever opening value.
HINT:
Throttle valveResistance
Fully close0.2 to 5.7 k
Fully open2.0 to 10.2 k
Page 1790 of 5135
TEMPERATUREC(F)
RESISTANCE k
30
20
10
5
2
1
0.5
0.3
0.2
0.13
±20 0 20 40 60 80 100
(±4)(32) (80) (140)(104) (212)
(176)
A50371
A65174
Ohmmeter
E34090
10±22
± ENGINE CONTROL SYSTEMSFI SYSTEM (1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
5. INSPECT ENGINE COOLANT TEMPERATURE
SENSOR
(a) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-
tween each terminal.
Resistance:
Approx. 20C (68F) 2.32 to 2.59k
Approx. 80C (176F) 0.310 to 0.326k
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 kat 20C (68F)
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 continuity
between terminals 3 and 5.
Specified condition: Continuity
Page 1791 of 5135
E34090
± ENGINE CONTROL SYSTEMSFI SYSTEM (1AZ±FE)
10±23
AVENSIS REPAIR MANUAL (RM1018E)
8. INSPECT CIRCUIT OPENING 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 continuity
between terminals 3 and 5.
Specified condition: Continuity
Page 1792 of 5135
100G6±02
A75903
Air
A79035
VG
EVG
A79035E2
PSW
10±18
±
ENGINE CONTROL SYSTEM SFI SYSTEM(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
SFI SYSTEM(1AZ±FE)
ON±VEHICLE INSPECTION
1.INSPECTMASS AIR FLOW METER
(a)If you have hand±held tester: Inspect for operation
(1)Connect the hand±held tester to the DLC3.
(2)Turn the ignition switch ON.
(3)Blow air into the MAF meter, and check that the airflow fluctuates (MAF) of the ºDIAGNOSIS / OBD/
MOBD / DATA LIST / ALLº shown the standard val-
ue.
If operation is not as specified, check the MAF meter (See page
10±20), wiring and ECM.
(b)If you have no hand±held tester: Inspect for operation
(1)Turn the ignition switch ON.
(2)Connect the positive tester probe of the voltmeterto the terminal VG of the ECM. and the negative tes-
ter probe of the voltmeter to the terminal EVG of the
ECM.
(3)Blow air into the MAF meter, and check that the volt- age fluctuates.
If operation is not as specified, check the MAF meter (See page
10±20), wiring and ECM.
2. INSPECT POWER STEERING OIL PRESSURE SEN- SOR
(a) Using a voltmeter, measure the voltage between termi-
nals PSW and E2.
Voltage:
ConditionVoltage (V)
Not spin the steering wheel at engine idling9 to 14
Spin the steering wheel at engine idling0 to 3