TOYOTA AVENSIS 2005 Service Repair Manual

B67965
Wire Harness SideC11
Combination Meter Assy
(Combination Meter ECU)
B68158
Wire Harness SideC10
Combination Meter Assy
(Combination Meter ECU)
05±1696
±
DIAGNOSTICS MULTIPLEX COMMUNICATION SYSTEM
AVENSIS REPAIR MANUAL (RM1018E)
2 CHECK COMBINATION METER ASSY (COMBINATION METER ECU) (POWER SOURCE)
(a) Disconnect the C11 ECU connector.
(b) Check the voltage between the wire harness side con-
nector and the body ground.
Standard:
Tester ConnectionSpecified Condition
C11±20 (+B) ± Body ground10 to 14 V
NG REPAIR OR REPLACE HARNESS AND CONNECTOR
OK
3 CHECK COMBINATION METER ASSY (COMBINATION METER ECU) (GROUND)
(a) Disconnect the C10 ECU connector.
(b) Check the resistance between the wire harness side con-
nector and the body ground.
Standard:
Tester ConnectionSpecified Condition
C10±17 (POWER EARTH) ±
Body groundBelow 1

NG REPAIR OR REPLACE HARNESS AND
CONNECTOR
OK
REPLACE COMBINATION METER ASSY (COMBINATION METER ECU) (See page 05±1509)

100FH±01
A778975 Claws
A77902
A77872
10±26
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY(1AZ±FE)
AVENSIS REPAIR MANUAL (RM1018E)
Removal & Installation and Disassembly & Reassembly
1.REMOVE ENGINE ROOM COVER SIDE
(a)Remove the retainer and 4 clips.
(b)Unfasten the 5 claws and remove the radiator support opening cover.
2.REMOVE RADIATOR SUPPORT OPENING COVER
(a)Remove the 2 clips, and then remove the engine room cover side.
3.DRAIN ENGINE COOLANT (See page 16±19)
4. REMOVE ENGINE COVER SUB±ASSY NO.1
(a) Remove the 2 nuts, and then remove the engine cover No. 1.

A77873
(a)
(c)
(b)
(d)
(h)
(i)
(g)
(g)
(f)
(e)
Air cleaner clamp
(c)
A77874
± ENGINE CONTROL SYSTEMTHROTTLE BODY ASSY (1AZ±FE)
10±27
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 ventilation hose.
(e) Disconnect the fuel vapor feed hose No. 1.
(f) Disconnect the fuel vapor feed hose N0. 2.
(g) Remove the fuel vapor feed hose No. 2 from 2 clamps of
the air cleaner hose.
(h) Lock the hose clamp as shown in the illustration.
(i) Raise the air cleaner clamp up, slide it to the air cleaner
cap.
(j) Remove the air cleaner cap together with air cleaner hose
No. 1.
6. SEPARATE ACCELERATOR CONTROL CABLE ASSY
(a) Loosen the nut and separate the accelerator control
cable.

A77875
(a)
(b)
(c)
(d)
(e)
A81619
A77876
A77877
A77878
10±28
± ENGINE CONTROL SYSTEMTHROTTLE 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.

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

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

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)

100G7±02
321 4 5
±20
020 40 60
80100 0.1 0.2 0.3 0.51 235 1020 30
TEMPERATURE
C(
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 k
20
C (68
F)
THA ± E20.49 to 0.67 k
60
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.

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

TEMPERATURE
C(
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. 20
C (68
F) 2.32 to 2.59k
Approx. 80
C (176
F) 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 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 continuity
between terminals 3 and 5.
Specified condition: Continuity