engine TOYOTA SIENNA 2007 Service Repair Manual

EC–62GR-FE EMISSION CONTROL – EMISSION CONTROL SYSTEM
EC
4. CHECK AIR INLET LINE
(a) Disconnect the air inlet line hose from the charcoal
canister.
(b) Check that air can flow freely into the air inlet line.
If air cannot flow freely into the air inlet line, repair or
replace it.
(c) Reconnect the air inlet line hose to the charcoal
canister.
5. VISUALLY INSPECT HOSES, CONNECTORS AND
GASKETS
(a) Check for cracks, leaks or damage.
HINT:
Removal or problems with the engine oil dipstick, oil
filler cap, PCV hose and other components may
cause the engine to run improperly. Disconnection,
looseness or cracks in the parts of the air induction
system between the throttle body and cylinder head
will allow air suction and cause the engine to run
improperly.
If necessary, replace any damaged parts.
A163329
A094394

2GR-FE EMISSION CONTROL – CANISTEREC–7
EC
ENGINE
2GR-FE EMISSION CONTROL
CANISTER
COMPONENTS
A162863E01

EC–142GR-FE EMISSION CONTROL – VENTILATION VALVE
EC
ENGINE
2GR-FE EMISSION CONTROL
VENTILATION VALVE
COMPONENTS
A162859E01

2GR-FE EMISSION CONTROL – AIR FUEL RATIO SENSOR (for 2WD)EC–17
EC
ENGINE
2GR-FE EMISSION CONTROL
AIR FUEL RATIO SENSOR (for 2WD)
COMPONENTS
A162935E02

EC–182GR-FE EMISSION CONTROL – AIR FUEL RATIO SENSOR (for 2WD)
EC
ON-VEHICLE INSPECTION
HINT:
The type of ignition switch on this model differs according to
the specifications of the vehicle. For the expressions used in
this section, refer to the "EXPRESSIONS OF IGNITION
SWITCH" precaution (See page ES-1).
1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Data List / A/FS B1
S1 and O2S B1 S2.
(d) Warm up the A/F sensor with the engine speed at
2500 rpm for approximately 2 minutes.
(e) Keep the engine speed at 2500 rpm and confirm
that the "A/FS B1 S1" and "A/FS BS S1" display is
as shown in the illustration.
HINT:
• The illustration may slightly differ from the display
on the intelligent tester.
• Only the intelligent tester displays the waveform
of the A/F sensor.
• On the tester, select the following menu items:
DIAGNOSIS / ENHANCED OBD II / ACTIVE
TEST / A/F CONTROL.
• The A/F CONTROL operation lowers the fuel
injection volume by 12.5% or increases the
injection volume by 25%.
• The sensors react in accordance with increases
and decreases in the fuel injection volume.
Standard
NOTICE:
The A/F sensor has an output delay of a few
seconds.
(f) Confirm that the "O2S B1 S2" and "A/FS BS S1"
display changes between 0 to 1 V with the engine
speed at 2500 rpm.
OK:
The voltage output oscillates more than 8
times in 10 seconds.
NOTICE:
• Perform the check immediately after warming
the engine up.
• If the voltage variation could not be verified,
warm up the A/F sensor again. If it could not
be verified even after warming up the sensor
again, check for DTCs (See page ES-39).
A111996E08
Tester Display
(Sensor)Injection Volume Status Voltage
AFS B1 S1
(A/F)+25% Rich Less than 3.0
-12.5% Lean More than 3.35
AFS B2 S1
(A/F)+25% Rich Less than 3.0
-12.5% Lean More than 3.35

EC–242GR-FE EMISSION CONTROL – AIR FUEL RATIO SENSOR (for 4WD)
EC
ENGINE
2GR-FE EMISSION CONTROL
AIR FUEL RATIO SENSOR (for 4WD)
COMPONENTS
A162936E01

2GR-FE EMISSION CONTROL – AIR FUEL RATIO SENSOR (for 4WD)EC–25
EC
ON-VEHICLE INSPECTION
HINT:
The type of ignition switch on this model differs according to
the specifications of the vehicle. For the expressions used in
this section, refer to the "EXPRESSIONS OF IGNITION
SWITCH" precaution (See page ES-1).
1. CHECK AIR FUEL RATIO COMPENSATION SYSTEM
(a) Connect the intelligent tester to the DLC3.
(b) Turn the ignition switch to the ON position.
(c) Select the following menu items: Data List / A/FS B1
S1 and O2S B1 S2.
(d) Warm up the A/F sensor with the engine speed at
2500 rpm for approximately 2 minutes.
(e) Keep the engine speed at 2500 rpm and confirm
that the "A/FS B1 S1" and "A/FS BS S1" display is
as shown in the illustration.
HINT:
• The illustration may slightly differ from the display
on the intelligent tester.
• Only the intelligent tester displays the waveform
of the A/F sensor.
• On the tester, select the following menu items:
DIAGNOSIS / ENHANCED OBD II / ACTIVE
TEST / A/F CONTROL.
• The A/F CONTROL operation lowers the fuel
injection volume by 12.5% or increases the
injection volume by 25%.
• The sensors react in accordance with increases
and decreases in the fuel injection volume.
Standard
NOTICE:
The A/F sensor has an output delay of a few
seconds.
(f) Confirm that the "O2S B1 S2" and "A/FS BS S1"
display changes between 0 to 1 V with the engine
speed at 2500 rpm.
OK:
The voltage output oscillates more than 8
times in 10 seconds.
NOTICE:
• Perform the check immediately after warming
the engine up.
• If the voltage variation could not be verified,
warm up the A/F sensor again. If it could not
be verified even after warming up the sensor
again, check for DTCs (See page ES-39).
A111996E08
Tester Display
(Sensor)Injection Volume Status Voltage
AFS B1 S1
(A/F)+25% Rich Less than 3.0
-12.5% Lean More than 3.35
AFS B2 S1
(A/F)+25% Rich Less than 3.0
-12.5% Lean More than 3.35

2GR-FE EMISSION CONTROL – HEATED OXYGEN SENSOR (for 2WD)EC–31
EC
ENGINE
2GR-FE EMISSION CONTROL
HEATED OXYGEN SENSOR (for 2WD)
COMPONENTS
A163379E01

2GR-FE EMISSION CONTROL – HEATED OXYGEN SENSOR (for 4WD)EC–37
EC
ENGINE
2GR-FE EMISSION CONTROL
HEATED OXYGEN SENSOR (for 4WD)
COMPONENTS
A162953E01

2GR-FE INTAKE – INTAKE SYSTEMIT–1
IT
ENGINE
2GR-FE INTAKE
INTAKE SYSTEM
PARTS LOCATION
A162728E01