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EC-5
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM
EC0E6-01

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

TOYOTA Hand-held Tester (c) 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.
D08002

(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
the battery to the VSV terminals for the EVAP.
(3) Start the engine.

B09807

2002 ECHO (RM884U)

Author : Date : 704
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) If you have 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, and 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.

(j) If you have TOYOTA hand-held tester:
Force driving of the VSV for canister closed valve (CCV)
(1) Connect a TOYOTA hand-held tester to the DLC3.
(2) Turn the ignition switch ON.
(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 canister
D08002 closed valve (CCV).
NOTICE:
Do not start the engine.
HINT:
If the check is not completed within 10 minutes, the forced close
of VSV for canister closed valve (CCV) will be reset.

2002 ECHO (RM884U)

Author : Date : 705
EC-7
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM

Hose Clipper (k) IF you have no TOYOTA hand-held tester:
Close off the air drain hose at the marked position of the
Air Drain Hose
canister with a hose clipper or similar instrument.

B09372

(l) Check the pressure.
Pressure
Gauge (1) Add the pressure (13.5 - 15.5 in.Aq) from the EVAP
service port.
Pressure:
2 minutes after the pressure is added, the gauge
should be over 7.7 - 8.8 in.Aq.
HINT:
Pressure If you can't add pressure, you can conclude that the hose con-
B06546 necting the VSV for EVAP-canister-fuel tank has slipped off or
the VSV is open.
(2) 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.
(m) If you have TOYOTA hand-held tester:
Conclude forced driving of he VSV for canister closed
B06547 valve (CCV).
(1) Turn ignition switch OFF.
(2) Disconnect the TOYOTA hand-held tester from the
DLC3.
(n) If you have no TOYOTA hand-held tester:
Remove the hose clipper or similar instrument from the air
drain hose.
(o) Disconnect the pressure gauge from the EVAP service
port on the purge line.

2002 ECHO (RM884U)

Author : Date : 706
EC-8
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM

5. CHECK AIRTIGHTNESS IN FUEL TANK AND FILLER
PIPE
(a) Disconnect the EVAP line hose from the charcoal canis-
ter.
(1) Pinch portion A.
(2) Pull out the connector.
(b) Pressurize and make the internal pressure in the fuel tank
4 kPa (41 gf/cm2, 0.58 psi).
(c) Check that the internal pressure of the fuel tank can be
EVAP Line Hose held for 1 minute.
A (d) Check the connected portions of each hose and pipe.
(e) Check the installed parts on the fuel tank.
If there is no abnormality, replace the fuel tank and filler pipe.
(f) Reconnect the EVAP line hose to the charcoal canister.

B09373

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.
(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
Air Purge Line Hose hose.
B09374 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 anything stuck in the vent line hose and
EVAP line hose.
If there is nothing stuck in them, replace the fuel cut off valve
and fill check valve.
(e) Reconnect the purge line hose and EVAP line hose to the
charcoal canister.

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.

Air Inlet Line Hose
Air
B09375

2002 ECHO (RM884U)

Author : Date : 707
EC-9
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM

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

Pinch

B09376

9. INSPECT CHARCOAL CANISTER
(a) Visually check the charcoal canister for cracks or dam-
age.

B09377

Air Drain Port (b) Inspect the charcoal canister operation.
Purge Port
(1) Plug the vent port with a cap.
Vent 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.

Cap
Air
EVAP Port
B09378

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

Air
EVAP Port
Air Inlet Port B09379

2002 ECHO (RM884U)

Author : Date : 708
EC-10
EMISSION CONTROL - EVAPORATIVE EMISSION (EVAP) CONTROL SYSTEM

(4) Apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg)
Air Inlet Port 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
B09380

(5) While holding the air inlet port closed, apply vacuum
Air Inlet Port
Purge 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 a problem is found, replace the charcoal canister.
(6) Remove the cap from the vent port.
10. INSPECT VSV FOR EVAP
(See page SF-50 )
11. INSPECT VSV FOR CANISTER CLOSED VALVE (CCV)
EVAP Port
Vacuum B09381 (See page SF-52 )
12. INSPECT VAPOR PRESSURE SENSOR
(See page SF-56 )
13. REINSTALL CHARCOAL CANISTER ASSEMBLY

2002 ECHO (RM884U)

Author : Date : 709

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