Page 2713 of 4323
EM0EE±20
A23378
N´m (kgf´cm, ft´lbf): Specified torque
Non±reusable partHeat Insulator
Ring
Ring
Clamp
Gasket Center Exhaust Pipe
Ring
Ring
Exhaust Tail Pipe
Ring
Heat Insulator
32 (326, 24)
0 ± 30°
Ring
48 (489, 35)
Heat Insulator
Gasket
Gasket
RH Front Exhaust Pipe
62 (632, 46)
4WD:
LH Front Heat Insulator
Heated Oxygen
Sensor
Heat Insulator
Heated Oxygen
Sensor
Gasket
Ring
62 (632, 46)
LH Front Exhaust PipeGasket
EM±126
± ENGINE MECHANICALEXHAUST SYSTEM
2705 Author: Date:
2005 SEQUOIA (RM1146U)
EXHAUST SYSTEM
COMPONENTS
Page 2714 of 4323
EM1X4±01
A23379
A23380
A23381
A23382
A23383
± ENGINE MECHANICALEXHAUST SYSTEM
EM±127
2706 Author: Date:
2005 SEQUOIA (RM1146U)
REMOVAL
1. REMOVE HEATED OXYGEN SENSORS
(a) Disconnect the heated oxygen sensor.
(b) Remove the heated oxygen sensor.
2. REMOVE RH AND LH FRONT EXHAUST PIPES
(a) Remove the 6 nuts and 2 gaskets, and disconnect the
front exhaust pipes from the exhaust manifold.
(b) Remove the 4 bolts, 2 gaskets and 2 front exhaust pipes
from the center exhaust pipe.
3. REMOVE CENTER EXHAUST PIPE
(a) Loosen the clamp bolt, disconnect the center exhaust
pipe and remove the gasket from the exhaust tail pipe.
(b) Remove the 5 rings and center exhaust pipe.
4. REMOVE EXHAUST TAIL PIPE
Remove the 2 rings and exhaust tail pipe.
5. REMOVE HEAT INSULATOR
(a) Remove the 5 bolts and No.1 heat insulator.
(b) Remove the 4 bolts and No.2 heat insulator.
(c) Remove the 3 bolts and No.3 heat insulator.
(d) Remove the 2 bolts and No.4 heat insulator.
Page 2715 of 4323

EM1X5±01
A23383
A23382
A23380
A23381
EM±128
± ENGINE MECHANICALEXHAUST SYSTEM
2707 Author: Date:
2005 SEQUOIA (RM1146U)
INSTALLATION
1. INSTALL HEAT INSULATOR
(a) Install the No.1 heat insulator with the 5 bolts.
(b) Install the No.2 heat insulator with the 4 bolts.
(c) Install the No.3 heat insulator with the 3 bolts.
(d) Install the No.4 heat insulator with the 2 bolts.
2. INSTALL EXHAUST TAIL PIPE
(a) Install the 2 rings and exhaust tail pipe.
3. INSTALL CENTER EXHAUST PIPE
(a) Install the 5 rings and center exhaust pipe.
(b) Install a new gasket and connect the center exhaust pipe
to the exhaust tail pipe with a new clamp.
Torque: 32 N´m (326 kgf´cm, 24 ft´lbf)
4. INSTALL RH AND LH FRONT EXHAUST PIPES
(a) Install 2 new gaskets and connect the 2 front exhaust
pipes with the 6 nuts to the exhaust manifold.
Torque: 62 N´m (632 kgf´cm, 46 ft´lbf)
(b) Install 2 new gaskets and connect the 2 front exhaust pipe
with the 4 bolts to the center exhaust pipe.
Torque: 48 N´m (489 kgf´cm, 35 ft´lbf)
Page 2716 of 4323
A23379
± ENGINE MECHANICALEXHAUST SYSTEM
EM±129
2708 Author: Date:
2005 SEQUOIA (RM1146U)
5. INSTALL HEATED OXYGEN SENSORS
(a) Install the heated oxygen sensor.
Torque: 44 N´m (450 kgf´cm, 33 ft´lbf)
(b) Connect the heated oxygen sensor connector.
Page 2717 of 4323
EC087±03
± EMISSION CONTROLEMISSION CONTROL SYSTEM
EC±1
2709 Author: Date:
2005 SEQUOIA (RM1146U)
EMISSION CONTROL SYSTEM
PURPOSE
The emission control systems are installed to reduce the amount of HC, CO and NOx exhausted from the
engine ((3) and (4)), to prevent the atmospheric release of blow±by gas±containing HC (1) and evaporated
fuel containing HC being released from the fuel tank (2).
The function of each system is shown in these table:
SystemAbbreviationFunction
(1) Positive Crankcase Ventilation
(2) Evaporative Emission Control
(3) Three±Way Catalytic Converter
(4) Sequential Multiport Fuel Injection*PCV
EVAP
TWC
SFIReduces HC
Reduces evaporated HC
Reduces HC, CO and NOx
Injects a precisely timed, optimum amount of fuel for reduced exhaust
emissions
Remark: * For inspection and repair of the SFI system, refer to the SF section in this manual.
Page 2718 of 4323
EC0NO±01
B17454
VSV for EVAP
Charcoal Canister
PCV Valve
EVAP Service
Port
Air Drain Hose VENT LineFilter
Purge Line
EC±2
± EMISSION CONTROLPARTS LAYOUT AND SCHEMATIC DRAWING
2710 Author: Date:
2005 SEQUOIA (RM1146U)
PARTS LAYOUT AND SCHEMATIC DRAWING
LOCATION
Page 2719 of 4323
B17534
TWC
TWC
Air Pump Assembly
VSV for Secondary
Air Injection System
Air Switching Valve No.2
Pressure Sensor
Air Switching Valve
Air Injection Control Driver
± EMISSION CONTROLPARTS LAYOUT AND SCHEMATIC DRAWING
EC±3
2711 Author: Date:
2005 SEQUOIA (RM1146U)
Page 2720 of 4323
EC089±06
B17455
Charcoal
Canister
VSV for EVAP
Air Injection
Control DriverTWC EVAP
Service
PortPurge Line VENT Line
ECM Fuel Tank
Air Filter
ECM To Intake Manifold
Pump Module
M
P
Pressure
Sensor Pump MotorVent ValveRefueling Valve
Air Inlet Line
MP
Air Switching
Valve
Air Switching
Valve No.2
VSVs Air PumpPressure
Sensor
EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
SECONDARY AIR INJECTION SYSTEM EC±4
± EMISSION CONTROLPARTS LAYOUT AND SCHEMATIC DRAWING
2712 Author: Date:
2005 SEQUOIA (RM1146U)
DRAWING