Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Sienna 2004-2007 Approved SRM 04 12 201kt inspec40
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12-6
EMISSION CONTROL - EMISSION CONTROL SYSTEM
1209L-02
INSPECTION
1. INSPECT VENTILATION VALVE SUB-ASSY
Cylinder Head Side (a) Install a clean hose to the ventilation valve.
(b) Inspect the ventilation valve operation.
(1) Blow air into the cylinder head side, and check that
air passes through easily.
CAUTION:
Do not suck air through the valve. Petroleum substances
Clean Hose inside the valve are harmful.
A59511
(2) Blow air into the intake manifold side, and check
that air passes through with difficulty.
Intake Manifold Side
If operation is not as specified, replace the ventilation valve.
(c) Remove the clean hose from the ventilation valve.
A59512
2. INSPECT FUEL TANK CAP ASSY
(a) Visually check if the cap and/or gasket are deformed or
damaged.
Gasket
A76682
3. INSPECT CHARCOAL CANISTER ASSY
(a) Visually check the charcoal canister for cracks or dam-
age.
A67137
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2289
12-7
EMISSION CONTROL - EMISSION CONTROL SYSTEM
(b) Inspect the charcoal canister operation.
Vent Port Air Air Line Port
(1) With the purge port closed, blow air (0.39 kPa, 4.0
gf/cm2, 0.06 psi) into the vent port, and check that
air flows from the air inlet port.
Purge Port A67138
Air Air Line Port
(2) With the air inlet port closed, blow air (0.39 kPa, 4.0
Vent Port gf/cm2, 0.06 psi) into the vent port, and check that
air flows from the purge port.
Purge Port A67139
Vacuum
(3) With the air inlet port closed, apply vacuum (3.43
Air Inlet Port kPa, 25.7 gf/cm2, 1.01 psi) to the vent port, and
Vent Port
check that air is sucked in from the purge port.
If operation is not as specified, replace the charcoal canister.
Purge Port A67140
(c) Inspect the air tightness.
Vacuum (1) With the vent and air inlet ports closed, apply vacu-
Vent Port
um (3.43 kPa, 25.7 gf/cm2, 1.01 psi) to the purge
port, and check that the vacuum remains stable for
1 minute.
HINT:
In order to maintain air tightness, this operation should be per-
formed with the CCV terminal ports closed by your fingers.
Purge Port Air Inlet Port
A67141 If operation is not as specified, replace the charcoal canister.
(d) Inspect the diaphragm.
Vacuum
A (1) Remove the air hose between ports A and B.
Vent Port (2) With the vent, purge and air inlet ports closed, apply
B
vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port
A, and check that air is sucked in from port B.
Purge Port Air Line Port
A67142
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2290
12-8
EMISSION CONTROL - EMISSION CONTROL SYSTEM
(3) With the vent, purge and air inlet ports closed, apply
Vent Port Vacuum vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port
A
A, and measure how long it takes for vacuum to
drop.
Vacuum drop time: 10 sec. or more
If operation is not as specified, replace the charcoal canister.
(4) Reinstall the air hose between ports A and B.
Air Inlet Port
Purge Port A67143
(e) Inspect VSV for open circuit.
Ohmmeter (1) Using an ohmmeter, check the resistance between
the terminals.
Resistance:
20 _C (68 _F) 25 to 30
100 _C (212 _F) 32 to 42
If the resistance is not as specified, replace the charcoal canis-
Continuity ter.
A74866
(f) Inspect VSV operation.
(1) Check that air flows from port A to ports B and C.
C
B
Air
A A74867
(2) Apply battery positive voltage across the terminals.
(3) Check that the valve is closed.
Battery
Closed
Valve A74868
(4) Check that air does not flow from port A to port B.
(5) Check that air flows from port A to port C.
C If operation is not as specified, replace the charcoal canister.
B
Battery
Air
A A74869
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2291
12-9
EMISSION CONTROL - EMISSION CONTROL SYSTEM
4. INSPECT DUTY VACUUM SWITCHING VALVE
Ohmmeter
(a) Inspect the VSV for open circuit.
(1) Using an ohmmeter, check the resistance between
the terminals.
Resistance: 26 to 30 at 20 _C (68 _F)
If the resistance is not as specified, replace the VSV.
Resistance
B16402 A75321
(b) Inspect the VSV for ground.
Ohmmeter
(1) Using an ohmmeter, check that there is no continu-
ity between each terminal and the body.
If there is continuity, replace the VSV.
No Continuity
B16403 A75322
(c) Inspect the VSV operation.
(1) Check that air does not flow from the part.
Air
B16404 A75323
(2) Apply battery positive voltage across the terminals.
(3) Check that air flows from the port.
If operation is not as specified, replace the VSV.
Air
Battery
B16405 A75324
5. INSPECT AIR FUEL RATIO SENSOR
(a) Using an ohmmeter, measure the resistance between the
+B HT terminals.
Resistance:
Terminal No. Resistance
1 (HT) - 2 (+B) 0.8 to 1.4 at 20_C (68_F)
1 (HT) - 2 (+B) 1.8 to 3.2 at 800_C (1,472_F)
AF- AF+
1 (HT) - 4 (AF-) No Continuity
A75325 If the resistance is not as specified, replace the sensor.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2292
12-10
EMISSION CONTROL - EMISSION CONTROL SYSTEM
6. INSPECT HEATED OXYGEN SENSOR (BANK1
OXYGEN SENSOR NO.2)
(a) Using an ohmmeter, measure the resistance between the
terminals.
Resistance:
Terminal No. Resistance
1 (HT) - 2 (+B) 11 to 16 at 20 _C (68 _F)
1 (HT) - 4 (E1) No Continuity
HT +B OX E1
A75326 If the resistance is not as specified, replace the sensor.
7. INSPECT HEATED OXYGEN SENSOR (BANK2
OXYGEN SENSOR NO.2)
+B HT (a) Using an ohmmeter, measure the resistance between the
terminals.
Resistance:
Terminal No. Resistance
E1 OX 1 (HT) - 2 (+B) 11 to 16 at 20 _C (68 _F)
1 (HT) - 4 (E1) No Continuity
A63266 A75327 If the resistance is not as specified, replace the sensor.
2005 SIENNA REPAIR MANUAL (RM1163U)
Author : Date : 2293
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