Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Land Cruiser 1986.1998-2007 Approved 98-07 Emission Control
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EC-1
EMISSION CONTROL - EMISSION CONTROL SYSTEM
EMISSION CONTROL SYSTEM
EC07H-02
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:
System Abbreviation Function
(1) Positive Crankcase Ventilation PCV Reduces HC
(2) Evaporative Emission Control EVAP Reduces evaporated HC
(3) Three-Way Catalytic Converter TWC Reduces HC, CO and NOx
(4) Sequential Multiport Fuel Injection* SFI 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.
2004 LAND CRUISER (RM1071U)
Author : Date : 1689
EC-5
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EVAPORATIVE EMISSION (EVAP)
CONTROL SYSTEM EC0MF-01
INSPECTION
1. INSPECT LINES AND CONNECTIONS
Visually check for loose connections, sharp bends or damage.
2. INSPECT FUEL TANK
Visually check for deformation, cracks or fuel leakage.
3. INSPECT FUEL TANK CAP
Visually check if the cap and/or gasket are deformed or dam-
aged.
If necessary, repair or replace the cap.
Gasket
B04812
4. INSPECT EVAP SYSTEM LINE
Vacuum
Gauge (a) Warm up the engine and stop the engine.
Allow the engine to warm up to normal operating tempera-
ture.
(b) Install a vacuum gauge (EVAP control system test equip-
ment vacuum gauge) to the EVAP service port on the
purge line.
B06544
(c) TOYOTA Hand-Held tester:
TOYOTA Hand-Held Tester
Forced driving of the VSV for the EVAP.
(1) Connect a TOYOTA hand-held tester to the DLC3.
(2) Start the engine.
(3) Push the TOYOTA hand-held tester main switch
ON.
(4) Use the ACTIVE TEST mode on the TOYOTA
hand-held tester to operate the VSV for the EVAP.
I24672
(d) If you have no TOYOTA Hand-Held Tester:
Forced driving of the VSV for the EVAP.
(1) Disconnect the VSV connector for the EVAP.
(2) Connect the positive (+) and negative (-) leads from
Battery the battery to the VSV terminals for the EVAP.
(3) Start the engine.
B06759
2004 LAND CRUISER (RM1071U)
Author : Date : 1693
EC-6
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
(e) Check the vacuum at idle.
Vacuum:
Maintain at 0.368 - 19.713 in.Hg (5 - 268 in.Aq) for over
5 seconds
HINT:
If the vacuum does not change, you can conclude that the hose
connecting the VSV to the service port has come loose or is
blocked, or the VSV is malfunctioning.
B06545 (f) TOYOTA Hand-Held Tester:
Conclude forced driving of the VSV for the EVAP.
(1) Stop the engine.
(2) Disconnect the TOYOTA hand-held tester from the
DLC3.
(g) If you have no TOYOTA Hand-Held Tester:
Conclude forced driving of the VSV for the EVAP.
(1) Stop the engine.
(2) Disconnect the positive (+) and negative (-) leads
from the battery from the VSV terminals for the
EVAP.
(3) Connect the VSV connector for the EVAP.
(h) Disconnect the vacuum gauge from the EVAP service
port on the purge line.
(i) Connect a pressure gauge to the EVAP service port on
the purge line.
Air Drain Hose
(j) Check the pressure.
(1) Close off the air drain hose at the marked position
of the canister with a hose clipper or similar instru-
ment.
Hose Clipper
B13332
(2) Add the pressure (13.5 - 15.5 in.Aq) from the EVAP
Pressure
Gauge service port.
Pressure:
2 minutes after the pressure is added, the gauge
should be over 7.7 - 8.8 in.Aq.
HINT:
If you can't add pressure, you can conclude that the hose con-
Pressure necting the VSVXcanisterXfuel tank has slipped off or the
B06546 VSV is open.
2004 LAND CRUISER (RM1071U)
Author : Date : 1694
EC-7
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
(3) Check if the pressure decreases when the fuel tank
Fuel Tank Cap
cap is removed while adding pressure.
HINT:
If the pressure does not decrease when the filler cap is re-
moved, then you can conclude that the hose connecting the
service port to the fuel tank is blocked, etc.
(k) Disconnect the pressure gauge from the EVAP service
port on the purge line.
B06547
5. CHECK AIRTIGHTNESS IN FUEL TANK AND FILLER
EVAP Line Hose
PIPE
Air
(a) Disconnect the EVAP line hose from the charcoal canister
side and then pressurize and make the internal pressure
in the fuel tank 4 kPa (41 gf/cm2, 0.58 psi).
(b) Check that the internal pressure of the fuel tank can be
hold for 1 minute.
(c) Check the connected portions of each hose and pipe.
B13333 (d) Check the installed parts on the fuel tank.
If there is no abnormality, replace the fuel tank and filler pipe.
(e) Reconnect the EVAP line hose to the charcoal canister.
Purge Line Hose
6. INSPECT FUEL CUTOFF VALVE AND FILL CHECK
EVAP Line Hose VALVE
(a) Disconnect the purge line hose and EVAP line hose from
the charcoal canister.
(b) Plug the cap to the air drain hose.
(c) Pressurize 4 kPa (41 gf/cm2, 0.58 psi) to the purge port
and check that there is ventilation through the EVAP line
hose.
Air
B13334 HINT:
In the condition that the fuel is full, as the float value of the fill
check valve is closed and has no ventilation, it is necessary to
check the fuel amount (volume).
(d) Check if there is any struck in the vent line hose and EVAP
line hose.
If there is no stuck in hoses, replace the fuel cutoff valve and fill
check valve.
(e) Reconnect the purge line hose and EVAP line hose to the
charcoal canister.
2004 LAND CRUISER (RM1071U)
Author : Date : 1695
EC-8
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
7. CHECK AIR INLET LINE
(a) Disconnect the air inlet line hose from the charcoal canis-
ter.
(b) Check that there is ventilation in the air inlet line.
(c) Reconnect the air inlet line hose to the charcoal canister.
8. REMOVE CHARCOAL CANISTER ASSEMBLY
Air Inlet Hose Air B13335
9. INSPECT CHARCOAL CANISTER
(a) Visually check the charcoal canister for cracks or dam-
age.
B13336
Purge Port (b) Inspect the charcoal canister operation.
(1) While holding the purge port closed, blow air (1.76
EVAP Port
kPa, 18 gf/cm2, 0.26 psi) into the EVAP port and
check that air flows from the air drain port.
Air
Air Drain Port
B13337
Purge Port (2) While holding the purge port and the air drain port
closed, blow air (1.76 kPa, 18 gf/cm2, 0.26 psi) into
Air Inlet Port EVAP Port the EVAP port and check that air does not flow from
the air inlet port.
Air
Air Drain Port
B13338
(3) Apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg)
Purge Port
to the purge port, check that the vacuum does not
decrease when the air inlet port is closed, and
check that the vacuum decreases when the air inlet
port is released.
Vacuum
Air Inlet Port B13339
2004 LAND CRUISER (RM1071U)
Author : Date : 1696
EC-9
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
(4) While holding the air inlet port closed, apply vacuum
Purge Port
EVAP Port (3.43 kPa, 25.7 mmHg, 1.01 in Hg) to the EVAP port
and check that air flows into the purge port.
If operation is not as specified, replace the charcoal canister.
(5) Remove the cap from the vent port.
Vacuum 10. INSPECT VSV FOR EVAP (See page SF-44 )
11. INSPECT VSV FOR CANISTER CLOSED VALVE (CCV)
(See page SF-48 )
Air Inlet Port B13340 12. INSPECT VSV FOR VAPOR PRESSURE SENSOR (See
page SF-46 )
13. INSPECT VAPOR PRESSURE SENSOR
(See page SF-52 )
14. REINSTALL CHARCOAL CANISTER ASSEMBLY
2004 LAND CRUISER (RM1071U)
Author : Date : 1697
EC-4 EMISSION CONTROL - POSITIVE CRANKCASE VENTILATION (PCV)
SYSTEM
POSITIVE CRANKCASE
VENTILATION (PCV) SYSTEM EC07K-04
INSPECTION
1. REMOVE V-BANK COVER
2. INSPECT PCV VALVE
(a) Remove the PCV valve.
Cylinder Head Side (b) Install a clean hose to the PCV valve.
(c) Inspect the PCV valve operation.
(1) Blow air into the cylinder head side, and check that
air passes through easily.
Clean Hose CAUTION:
Do not suck air through the valve. Petroleum substances
inside the valve are harmful.
B16803
(2) Blow air into the intake manifold side, and check
Intake that air passes through with difficulty.
Manifold
Side
If operation is not as specified, replace the PCV valve.
(d) Remove the clean hose from the PCV valve.
Clean Hose (e) Reinstall the PCV valve.
B16804
3. INSPECT HOSES, CONNECTIONS AND GASKETS
Visually for cracks, leaks or damage.
4. REINSTALL V-BANK COVER
B03197
2004 LAND CRUISER (RM1071U)
Author : Date : 1692
EC-3
EMISSION CONTROL - PARTS LAYOUT AND SCHEMATIC DRAWING
EC07J-08
DRAWING
EVAP Service Port VSV for Pressure
Switching Valve
VSV for Canister Closed Valve Purge Line Vapor
(CCV) Pressure
Air Inlet Line Sensor
EVAP Line
Charcoal
Canister
VSV for EVAP Air Drain Hose
TWC TWC
B16805
2004 LAND CRUISER (RM1071U)
Author : Date : 1691
EC-2
EMISSION CONTROL - PARTS LAYOUT AND SCHEMATIC DRAWING
PARTS LAYOUT AND SCHEMATIC DRAWING
EC07I-09
LOCATION
TWC
VSV for EVAP
PCV Valve
VSV for Canister
EVAP Service port Closed Valve (CCV)
VSV for Pressure
Switching Valve
Air Drain Hose
EVAP Line
Charcoal Canister
Purge Line
Air Intake Line
B16650
2004 LAND CRUISER (RM1071U)
Author : Date : 1690
EC-10 EMISSION CONTROL - THREE-W AY CATALYTIC CONVERTER (TWC)
SYSTEM
THREE-W AY CATALYTIC CONVERTER (TWC) SYSTEM
EC07M-02
COMPONENTS
z
Heated Oxygen Sensor
(Bank 2 Sensor 2) z 20 (200, 14)
z Gasket
40 (408, 30)
z Gasket
z z
z
z Gasket
z
TWC TWC
z 62 (632, 46)
RH Front Exhaust Pipe
z
Heated Oxygen Sensor
(Bank 1 Sensor 2) z 20 (200, 14)
z Gasket
40 (408, 30)
z Gasket z
z
z
z Gasket
TWC TWC
z
z 62 (632, 46)
LH Front Exhaust Pipe
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