Page 1121 of 2543
COMPONENTS FOR REAR TWC
REMOVAL AND INSTALLATION
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GE)EG±173
Page 1122 of 2543
SERVICE SPECIFICATIONS
TORQUE SPECIFICATIONS
Part tightened NVm kgfVcm ftVlbf
EGR valve x Intake air connector 21 210 15
EGR gas temperature sensor x EGR valve 20 200 14
EGR pipe x Cylinder head
27
280
20
EGR valve x EGR pipe 64 650 47
No.2 front exhaust pipe (Front TWC) x Exhaust manifold 62 630 46
Pipe support bracket x Transmission 43 440 32
No.2 front exhaust pipe (Front TWC) x Front exhaust pipe (Rear TWC)
43
440
32
Front exhaust pipe (Rear TWC) x Center exhaust pipe 43 440 32
Sub heated oxygen sensor (California only) x Front exhaust pipe 20 200 14
EG±174± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GE)
Page 1123 of 2543

EMISSION CONTROL SYSTEMS (2JZ±GTE)
SYSTEM PURPOSE
The emission control systems are installed to reduce the amount of CO, HC and NOx exhausted from the
engine ((3), (4) and (5)), to prevent the atmospheric release of blow±by gas±containing HC (1) and evapo-
rated fuel containing HC being released from the fuel tank (2).
The function of each system is shown in the following table.
System Abbreviation Function
(1) Positive Crankcase Ventilation
(2) Evaporative Emission Control
(3) Exhaust Gas Recirculation
(4) Three±way Catalytic Converter
(5) Sequential Multiport Fuel Injection*
PCV
EVAP
EGR
TWC
SFI
Reduces HC
Reduces evaporated HC
Reduces NOx
Reduces CO, HC 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 SFI section this manual.
PREPARATION
RECOMMENDED TOOLS
09082±00050 TOYOTA Electrical Tester Set
EQUIPMENT
Tachometer
Torque wrench
Vacuum gauge
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GTE)EG±175
Page 1124 of 2543

EMISSION CONTROL SYSTEMS (2JZ±GTE)
SYSTEM PURPOSE
The emission control systems are installed to reduce the amount of CO, HC and NOx exhausted from the
engine ((3), (4) and (5)), to prevent the atmospheric release of blow±by gas±containing HC (1) and evapo-
rated fuel containing HC being released from the fuel tank (2).
The function of each system is shown in the following table.
System Abbreviation Function
(1) Positive Crankcase Ventilation
(2) Evaporative Emission Control
(3) Exhaust Gas Recirculation
(4) Three±way Catalytic Converter
(5) Sequential Multiport Fuel Injection*
PCV
EVAP
EGR
TWC
SFI
Reduces HC
Reduces evaporated HC
Reduces NOx
Reduces CO, HC 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 SFI section this manual.
PREPARATION
RECOMMENDED TOOLS
09082±00050 TOYOTA Electrical Tester Set
EQUIPMENT
Tachometer
Torque wrench
Vacuum gauge
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GTE)EG±175
Page 1125 of 2543
LAYOUT AND SCHEMATIC DRAWING
EG±176± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GTE)
Page 1126 of 2543
POSITIVE CRANKCASE VENTILATION
(PCV) SYSTEM
PCV VALVE INSPECTION
1. REMOVE PCV VALVE
(a) Disconnect the PCV hose from the PCV valve.
(b) Remove the PCV valve.
2. INSTALL CLEAN HOSE TO PCV VALVE
3. INSPECT PCV VALVE OPERATION
(a) Blow air into the cylinder head side, and check that air passes
through easily.
CAUTION: Do not suck air through the valve. Petroleum sub-
stances inside the valve are harmful.
(b) Blow air into the air intake chamber side, and check that air
passes through with difficulty.
If operation is not as specified, replace the PCV valve.
4. REMOVE CLEAN HOSE FROM PCV VALVE
5. REINSTALL PCV VALVE
PCV HOSES AND CONNECTORS
INSPECTION
VISUALLY INSPECT HOSES, CONNECTIONS AND GAS-
KETS
Check for cracks, leaks or damage.
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GTE)EG±177
Page 1127 of 2543
EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM
FUEL VAPOR LINES, FUEL TANK AND
TANK CAP INSPECTION
1. VISUALLY INSPECT LINES AND CONNECTIONS
Look for loose connections, sharp bends or damage.
2. VISUALLY INSPECT FUEL TANK
Look for deformation, cracks or fuel leakage.
3. VISUALLY INSPECT FUEL TANK CAP
Check if the cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.
CHARCOAL CANISTER INSPECTION
1. REMOVE CHARCOAL CANISTER
2. VISUALLY INSPECT CHARCOAL CANISTER
Look for cracks or damage.
3. CHECK FOR CLOGGED FILTER AND STUCK CHECK
VA LV E
(a) Using low pressure compressed air (4.71 kPa (0.048
kgf/cm
2, 0.68 psi)), blow into port C and check that air flows
without resistance from the other ports. EG±178
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GTE)
Page 1128 of 2543

(b) Blow air (4.71 kPa (0.048 kgf/cm2, 0.68 psi)) into port A, and
check that air does not flow from the other ports.
(c) Blow air (4.71 kPa (0.048 kgf/cm
2, 0.68 psi)) into port B, and
check that air does not flow from the other ports.
If operation is not as specified, replace the charcoal canister.
4. CLEAN FILTER IN CANISTER
Clean the filter by blowing 294 kPa (3 kgf/cm
2, 43 psi) of com-
pressed air into port C while holding port A and B closed.
NOTICE:
Do not attempt to wash the canister.
No activated carbon should come out.
5. REINSTALL CHARCOAL CANISTER
VSV INSPECTION
(See VSV for EVAP in SFI System)
CHECK VALVE INSPECTION
1. REMOVE CHECK VALVE
2. INSPECT CHECK VALVE
(a) Check that air flows from the blue port to the black port.
(b) Check that air does not flow from the black port to the blue
port.
If operation is not as specified, replace the check valve.
3. REINSTALL CHECK VALVE
HINT: Install the check valve with the black port facing the
purge port side of the throttle body.
± ENGINEEMISSION CONTROL SYSTEMS (2JZ±GTE)EG±179