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 

SF–63

)

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)