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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.


               A


                                        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

 A




                 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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