Fuel Evaporative Emission Control Evap System

Purge Port

BVSV

Fuel Filler Cap

Purge Port

BVSV

Toyota Corolla Model Fuel Purge Line

Fuel Filler Cap

Check Valve

Fuel Vapor Fresh Air

Fuel Tank

Fuel Vapor Fresh Air

Fuel Tank

Check Valve

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To reduce HC emission, evaporated fuel from the fuel tank is routed through the charcoal canister to the intake manifold for combustion in the cylinders

Coolant Temp.

BVSV

Throttle Valve Opening

Canister Check Valve

Check

Evaporated Fuel (HC)

(1)

(2)

(3)

35°C(95°F)

CLOSED

HC from tank is absorbed in

Above

54«C<129°F)

OPEN

Positioned below purge port

CLOSED

tho canister

Positioned above purge port

OPEN

HC from canister is led into air intake chamber,

High pressure in tank

OPEN

CLOSED

CLOSED

HC from tank is absorbed in the canister

High vacuum in tank

CLOSED

OPEN

OPEN

(Air is led into the fuel tank.)

INSPECTION OF FUEL VAPOR LINES, FUEL TANK AND FILLER CAP

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.

Throttle Check Valve

Gasket

Check Valve {Vacuum Valve)

Gasket

Check Valve {Vacuum Valve)

3. VISUALLY INSPECT FUEL FILLER CAP

Check condition of gasket and cap. If necessary, repair or replace the cap.

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(Ci tot

INSPECTION OF CHARCOAL CANISTER

1. REMOVE CHARCOAL CANISTER

2. VISUALLY INSPECT CHARCOAL CANISTER CASE

Look for cracks or damage.

3. CHECK FOR CLOGGED FILTER AND STUCK CHECK VALVE

(a) Using low pressure compressed air, blow into the tank pipe and check that the air flows without resistance from the other pipes.

(b) Blow into the purge pipe and check that the air does not flow from the other pipes.

If a problem is found replace the charcoal canister.

4. CLEAN CANISTER FILTER

Clean the filter by blowing 3 kg/cm2 (43 psi, 294 kPa) of compressed air into the tank pipe, while holding the other upper canister pipe closed.

NOTE:

• Do not attempt to wash the canister.

• No activated carbon should come out.

5. INSTALL CHARCOAL CANISTER

INSPECTION OF BVSV

CHECK BVSV BY BLOWING AIR INTO PIPE

(a) Drain the coolant from the radiator into a suitable container.

(b) Remove the BVSV from the water outlet.

(c) Cool the BVSV to below 35°C (95°F) with cool water.

(d) Blow air into a pipe and check that the BVSV is closed.

(e) Heat the BVSV to above 54°C (129°F) with hot water.

Cf > Blow air into a pipe and check that the BVSV is open.

(g) Apply liquid sealer to the threads of the BVSV and install.

(h) Fill the radiator with coolant. If a problem is found, replace the BVSV.

Below 35°C

2000 Toyota Corolla Evaporative Emission
Water

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Below 35°C

Above 54°C

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Above 54°C

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Responses

  • Fre-weini
    How do you replace a evaporative emission control toyota?
    8 years ago
  • QUINZIA
    How to install updated evap valve on a 2004 toyota camry?
    8 years ago
  • mewael
    How to replace toyota rav4 vapor canister filter?
    7 years ago
  • martin thao
    When removing gas cap air comes out 2002 toyota celica?
    1 year ago
  • MAKDA DAWIT
    How does toyota fuelevaporative gas capwork?
    7 months ago
  • alessandra gallo
    How does the evap work on the fuel system of a 1986 toyota pu?
    4 months ago

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