check engine TOYOTA AVENSIS 2002 Manual Online

100G8±02
A75903
Air
A53763VGEVG
±
ENGINE CONTROL SYSTEM SFI SYSTEM(1AZ±FSE)
10±37
AVENSIS REPAIR MANUAL (RM1018E)
SFI SYSTEM(1AZ±FSE)
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 CURRENT DATA
shown the standard value.
If operation is not as specified, check the MAF meter (See page
10±39), 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±39), wiring and ECM.

A53763
E2PSW
10±38
±
ENGINE CONTROL SYSTEM SFI SYSTEM(1AZ±FSE)
AVENSIS REPAIR MANUAL (RM1018E)
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
3.INSPECT THROTTLE BODY
(a)Inspect the throttle control motor for operating sound.(1)Turn the ignition switch ON.
(2)When turning the accelerator pedal position sensor lever, check the running sound of the motor.Also, check that there is no friction sound.
If operation is not as specified, check the throttle control motor (See page 10±39), wiring and ECM.
(b) Inspect the throttle position sensor.
(1) Connect the hand±held tester to the DLC3.
(2) Turn the ignition switch ON.
(3) When turning the accelerator pedal position sensor lever to the full±\
open position, check thatthe throttle valve opening percentage (THROTTLE POS) of the CURRENT DATA shown the
standard value.
Standard throttle valve opening percentage:
60 % or more
If operation is not as specified, check that the accelerator pedal positio\
n sensor (See page 10±39), wiring
and ECM.
If you have no hand±held tester, measure voltage between terminals (VTA1 ± E2, VTA2 ± E2) of the ECM
connector (See page 05±318).
(c) Inspect the air assist system.
(1) Start the engine and check that the CHK ENG does not light up.
(2) Allow the engine to warm up to normal operating temperature.
(3) Turn the A/C compressor ON to OFF, and check the idle speed.
Idle speed (Transmission in neutral): 700
50 rpm
NOTICE:
Perform inspection under condition without electrical load.
(d) After checking the above (b) to (d), perform the driving test and check that there is no sense of incon-
gruity.
4. INSPECT ACCELERATOR PEDAL POSITION SENSOR
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON.
(c) Check that the voltage (ACCEL POS) of the CURRENT DATA shown the standard value.
Accelerator pedal released: 0.5 to 1.1 V
Accelerator pedal depress: 2.6 to 4.5 V
(d) Check that the voltage (ACCEL POS #2) of the CURRENT DATA shown the standard value. Accelerator pedal released: 1.2 to 2.0 V
Accelerator pedal depress: 3.4 to 5.3 V
If you have no hand±held tester, measure voltage between terminals (VPA ± EPA, VPA2 ± EPA2) of the ECM
connector (See page 05±318).

100EY±02
A60548
Air
E2
THAVG
E2G+B
30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
RESISTANCE k

±20 0 20 40 60 80 10054321
(±4)(32)(68)(104)(140)(176)(212)
TEMPERATURE
C(
F)
A60549
12
Valve
± ENGINE CONTROL SYSTEMSFI SYSTEM (1ZZ±FE/3ZZ±FE)
10±3
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) 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 output 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 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 catching of foreign objects causes
subtle pressure leak to the advanced direction. DTC can be de-
tected.

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 SYSTEMSFI 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

A60552
30
20
10
5
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 SYSTEMSFI SYSTEM (1ZZ±FE/3ZZ±FE)
10±5
AVENSIS REPAIR MANUAL (RM1018E)
5. INSPECT ENGINE COOLANT TEMPERATURE
SENSOR
(a) Resistance inspection.
(1) Using an ohmmeter, measure the resistance be-
tween terminals.
Resistance:
2.32 to 2.59 kat 20
C (68
F)
0.310 to 0.326 kat 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 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

A60553
10±6
± ENGINE CONTROL SYSTEMSFI SYSTEM (1ZZ±FE/3ZZ±FE)
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

100EX±02
A75903
Air
A79035
VG
EVG
A79035
E2
EMPS
±
ENGINE CONTROL SYSTEM SFI SYSTEM(1ZZ±FE/3ZZ±FE)
10±1
AVENSIS REPAIR MANUAL (RM1018E)
SFI SYSTEM(1ZZ±FE/3ZZ±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±3), 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±3), wiring and ECM.
2. INSPECT POWER STEERING OIL PRESSURE SWITCH
(a) Using a voltmeter, measure the voltage between termi-
nals EMPS and E2.
Voltage:
ConditionVoltage (V)
Not spin the steering wheel at engine idling8 to 14
Spin the steering wheel at engine idling0 to 1.5

A60620
Close Open
Valve
VaIve
Open
Close
Valve
1ZZ±FE:
3ZZ±FE:
VaIve 10±2
± ENGINE CONTROL SYSTEMSFI SYSTEM (1ZZ±FE/3ZZ±FE)
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.

Clear the DTC after inspection.
HINT:
When the ISCV system has malfunctions except for its adher-
ence, DTC P0505 is detected.
(a) Operation inspection.
(1) Connect the ISCV connector to the ISCV.
(2) Check the valve movement when the ignition switch
is turned ON.
Movement:
Half open fully close  fully open half open
HINT:
ISCV moves within 0.5 second.

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

A78511
(b)
A78512
(d)
A78513
(g)
(h)
±
ENGINE CONTROL SYSTEM THROTTLE BODY ASSY(1AZ±FSE)
10±45
AVENSIS REPAIR MANUAL (RM1018E)
(b)Remove the bolt, and then remove the ground terminal.
(c)Remove the 4 bolts, and then remove the throttle body
bracket.
(d)Disconnect the throttle motor connector.
(e)Remove the 4 bolts, and then remove the throttle body.
(f)Remove the gasket from the intake manifold.
(g)Disconnect the water by±pass hose No. 1.
(h)Disconnect the water by±pass hose No. 2.
7.INSTALL THROTTLE BODY ASSY
(a)Connect the water by±pass hose No. 2.
(b)Connect the water by±pass hose No. 1.
(c)Install a new gasket to the intake manifold.
(d)Install the throttle body with the 4 bolts. Torque: 9.0 N
m (90 kgf
cm, 80 in.
lbf)
(e)Connect the throttle motor connector.
(f)Install the throttle body bracket with the 4 bolts. Torque: 21 N
m (210 kgf
cm, 15 ft
lbf)
(g)Install the ground terminal with the bolt. Torque: 8.4 N
m (86 kgf
cm, 74 in.
lbf)
(h)Install the wire harness protector with the bolt. Torque: 8.4 N
m (86 kgf
cm, 74 in.
lbf)
8.INSTALL AIR CLEANER CAP SUB±ASSY Torque: 1.5 N
m (15 kgf
cm, 13 in.
lbf)
9.INSTALL ENGINE COVER SUB±ASSY NO.1 Torque: 7.0 N
m (71 kgf
cm, 62 in.
lbf)
10.ADD ENGINE COOLANT (See page 16±31)
11.CHECK FOR ENGINE COOLANT LEAKS (See page 16±25)
12. INSTALL ENGINE ROOM COVER SIDE