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EC-6
EMISSION CONTROL (5VZ-FE) - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC0DE-02

INSPECTION
1. VISUALLY INSPECT LINES AND CONNECTORS
Look for loose connections, sharp bends or damage.
2. VISUALLY INSPECT FUEL TANK FILLER PIPE
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.

EC3069

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 EVAP control system test equipment 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 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.
DLC3
S05331

(d) If you have no TOYOTA Hand-Held Tester:
Forced driving of the VSV for EVAP.
(1) Disconnect the VSV connector for the EVAP.
(2) Connect the positive (+) and negative (-) leads from
the battery to the VSV terminals for the EVAP.
(3) Start the engine.

Battery
B06548

2002 4RUNNER (RM887U)

Author : Date : 923
EC-7
EMISSION CONTROL (5VZ-FE) - 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 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 EVAP.
(1) Stop the engine.
(2) Disconnect the positive (+) and negative (-) leads
from the battery from the VSV terminals the EVAP.
(3) Connect the VSV connector for the EVAP.
(h) Disconnect the vacuum gauge.
(i) Connect the pressure gauge.

(j) Inspect for the pressure.
Hose Clipper
(1) Close off the air drain hose of the canister with a
hose clipper or similar instrument.

Air Drain
Hose

B13453

(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 VSV - canister - fuel tank has slipped off or the VSV
B06546 is open.

2002 4RUNNER (RM887U)

Author : Date : 924
EC-8
EMISSION CONTROL (5VZ-FE) - 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.

B06547

EVAP Line Hose 5. CHECK AIRTIGHTNESS IN FUEL TANK AND FILLER
PIPE
(a) Disconnect the EVAP line hose from the charcoal canister
side and then pressurize and make the internal pressure
Air 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.
B13454 (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.

EVAP Line Hose 6. INSPECT FUEL CUTOFF VALVE AND FILL CHECK
VALVE
(a) Disconnect the purge line hose and EVAP line hose from
the charcoal canister.
Cap (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
Purge Port
Air hose.
B13455 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.

2002 4RUNNER (RM887U)

Author : Date : 925
EC-9
EMISSION CONTROL (5VZ-FE) - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM

7. CHECK AIR INLET LINE
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.
Air

B13456

8. REMOVE CHARCOAL CANISTER ASSEMBLY
(a) Remove the spear tire.
(b) Disconnect the VSV connector.
(c) Disconnect the purge line hose, EVAP line hose and air
inlet line hose from the charcoal canister.
(d) Disconnect the vent line hose from the charcoal canister.
(1) Push the connector deep inside.
(2) Pinch portion A.
(3) Pull out the connector.
A Pinch
(e) Remove the 4 bolts and the charcoal canister assembly.
(f) Remove the 2 bolts and charcoal canister bracket.

Push

Pinch
B00658

9. INSPECT CHARCOAL CANISTER
(a) Visually check the charcoal canister for cracks or dam-
age.
(b) Inspect the charcoal canister operation.
(1) Plug the vent port with a hose and cap.
Hose

Cap B13457

Air Drain Port (2) While holding the purge port closed, blow air (1.76
kPa, 18 gf/cm2, 0.26 psi) into the EVAP port and
check that air flows from the air drain port.
Air
EVAP Port

Purge Port
B13458

2002 4RUNNER (RM887U)

Author : Date : 926
EC-10
EMISSION CONTROL (5VZ-FE) - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM

Air Drain Port (3) While holding the purge port and the air drain port
EVAP Port
closed, blow air (1.76 kPa, 18 gf/cm2, 0.26 psi) into
the EVAP port and check that air does not flow from
Air the air inlet port.

Air Inlet Port
B13459

Air Inlet Port (4) Apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg)
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.

Purge Port B13460

(5) While holding the air inlet port closed, apply vacuum
Air Inlet 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.
(6) Remove the cap and hose from the vent port.
10. INSPECT VSV FOR EVAP (See page SF-39 )
11. INSPECT VSV FOR PRESSURE SWITCHING VALVE
(See page SF-42 )
Purge Port B13461 12. INSPECT VSV FOR CANISTER CLOSED VALVE (CCV)
(See page SF-40 )
13. INSPECT VAPOR PRESSURE SENSOR
(See page SF-46 )
14. REINSTALL CHARCOAL CANISTER ASSEMBLY

2002 4RUNNER (RM887U)

Author : Date : 927

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