Toyota Sequoia (2005). Manual — part 683
B17663
Port A
Purge Port
Vent Port
Air Inlet Port
Pressure Gauge
Port B
B17603
A
B
C
Air
B17604
7
Closed
Valve
6
–
EMISSION CONTROL
EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC–13
2721
(c)
Check for air leakage.
(1)
Remove the air hose between ports A and B.
(2)
Connect the pressure gauge to the vent port of the
charcoal canister.
(3)
While holding port B, with the purge port and the air
inlet port closed and port A open, apply pressurized
air 19.6 kPa (0.2 kgf/cm
2
, 2.81 psi) of pressurized
air into the vent port, then confirm that the pressure
is retained for 1 minute.
If the result is not as specified, replace the charcoal canister as-
sembly.
(d)
Check leak detection pump.
(1)
Remove the detection pump from the charcoal can-
ister.
(2)
Check that air flows from port A to B and then C.
If the result is not as specified, replace the charcoal canister as-
sembly.
(3)
Connect the positive (+) lead to terminal 7 and the
negative (–) lead to terminal 6.
(4)
Check that the valve is closed.
If the result is not as specified, replace the charcoal canister as-
sembly.
(5)
Install the detection pump.
9.
INSPECT VSV FOR EVAP (See page
10.
REINSTALL CHARCOAL CANISTER ASSEMBLY
EC0JM–02
EC–14
–
EMISSION CONTROL
THREE–WAY CATALYTIC CONVERTER (TWC)
SYSTEM
2722
THREE–WAY CATALYTIC CONVERTER (TWC) SYSTEM
ON–VEHICLE INSPECTION
1.
CHECK EXHAUST PIPE ASSEMBLY
(a)
Check the connections for looseness or damage.
(b)
Check the clamps for weakness, cracks or damage.
2.
INSPECT TWC
Check for dents or damage.
If any part of protector is damaged or dented to the extent that it contacts the TWC, repair or replace it.
3.
INSPECT HEAT INSULATOR
(a)
Check the heat insulator for damage.
(b)
Check for adequate clearance between the TWC and heat insulator.
EC08C–05
B17492
N·m (kgf·cm, ft·lbf) : Specified torque
Non–reusable part
RH Front Exhaust Pipe
RH TWC
Gasket
Heated Oxygen Sensor
Ring
LH Front
Exhaust Pipe
62 (632, 46)
Gasket
Gasket
Heated Oxygen
Sensor
Gasket
LH TWC
62 (632, 46)
48 (489, 35)
44 (450, 32)
44 (450, 32)
–
EMISSION CONTROL
THREE–WAY CATALYTIC CONVERTER (TWC)
SYSTEM
EC–15
2723
COMPONENTS
EC0NQ–01
A23379
A23380
A23381
EC–16
–
EMISSION CONTROL
THREE–WAY CATALYTIC CONVERTER (TWC)
SYSTEM
2724
REPLACEMENT
1.
DISCONNECT HEATED OXYGEN SENSORS
Remove the 2 heated oxygen sensors from the front exhaust
pipes.
2.
REMOVE RH AND LH FRONT EXHAUST PIPES
(a)
Remove the 6 nuts from the front side of the RH and LH
front exhaust pipes.
(b)
Remove the 4 bolts from the rear side of the RH and LH
front exhaust pipes.
(c)
Remove the RH and LH front exhaust pipes and 4 gas-
kets.
3.
INSTALL RH AND LH FRONT EXHAUST PIPES
(a)
Install 4 new gaskets to the RH and LH front exhaust
pipes.
(b)
Install the 4 bolts.
Torque: 48 N·m (489 kgf·cm, 35 ft·lbf)
(c)
Install 6 new nuts to the front side of the RH and LH front
exhaust pipes.
Torque: 62 N·m (632 kgf·cm, 46 ft·lbf)
4.
INSTALL HEATED OXYGEN SENSOR
Install the 2 heated oxygen sensors to the RH and LH front ex-
haust pipes.
Torque: 44 N·m (450 kgf·cm, 32 ft·lbf)
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