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Toyota Camry
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Emission control
Emission control system (2AZ−FE)(From July, 2003)

1. INSPECT VENTILATION VALVE SUB−ASSY

  1. Install a clean hose to the ventilation valve.

  2.  Check ventilation valve operation.

1. Blow air into the cylinder head side, and check air passes through easily.

CAUTION: Do not suck air through the valve. Petroleum substances inside the valve are harmful.

2) Blow air into the intake manifold side, and check

2) Blow air into the intake manifold side, and check that air passes through with difficulty.

If operation is not as specified, replace the ventilation valve.

c. Remove the clean hose from the ventilation valve.

2. INSPECT FUEL TANK CAP ASSY

2. INSPECT FUEL TANK CAP ASSY

a. Visually check if the cap and gasket are deformed or damaged.


Inspect fuel tank cap assy

3. INSPECT CHARCOAL CANISTER ASSY (Except PZEV)

a. Visually check the charcoal canister for cracks or damage.

If cracks or damage is found, replace the charcoal canister assy.

b. Check charcoal canister operation.

b. Check charcoal canister operation.

1. While holding the purge port closed, blow air (0.39 kPa, 4.0 gf/cm2, 0.06 psi) into the vent port, and check that air flows from the air inlet port.

If the result is not as specified, replace the charcoal canister.

2. While holding the air inlet port closed, blow air (0.39

2. While holding the air inlet port closed, blow air (0.39 kPa, 4.0 gf/cm2, 0.06 psi) into the vent port, and check that air flows from the purge port.

If the result is not as specified, replace the charcoal canister.

3. While holding the air inlet port closed, apply vacuum

3. While holding the air inlet port closed, apply vacuum (3.43 kPa, 25.7 gf/cm2, 1.01 psi) to the vent port, and check that air is sucked in from the purge port.

If the result is not as specified, replace the charcoal canister.

c. Check the air tightness.

c. Check the air tightness.

1. While holding the vent and air inlet ports closed, apply vacuum (3.43 kPa, 25.7 gf/cm2, 1.01 psi) to the purge port, and check that the vacuum is maintained for 1 minute.

HINT: In order to maintain air tightness, the check should be performed while holding the CCV terminal port closed.

If the result is not as specified, replace the charcoal canister.

d. Check the diaphragm.

d. Check the diaphragm.

  1. Remove the air hose between ports A and B.

  2.  While holding the vent, purge and air inlet ports closed, apply vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port A, and check that air is sucked in from port B.

3. While holding the vent, purge and air inlet ports

3. While holding the vent, purge and air inlet ports closed, apply vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port A, and measure how long it takes for vacuum to drop.

Vacuum drop time: 10 seconds or more

If the result is not as specified, replace the charcoal canister.

4. Reinstall the air hose between ports A and B.

e. Check the VSV for open circuit.

e. Check the VSV for open circuit.

1. Measure the resistance between the terminals.

Standard:

If the result is not as specified, replace the charcoal

If the result is not as specified, replace the charcoal canister.

f. Check VSV operation.

f. Check VSV operation.

1. Check that air flows from port A to ports B and C.

If the result is not as specified, replace the charcoal canister.

  1. Apply battery positive voltage across the terminals.

  2. Check that the valve is closed.

If the result is not as specified, replace the charcoal canister.

NOTICE: Incorrect electrode connection causes damage to the VSV.

Pay due attention when connecting the lead wire.

  1. Check that air does not flow from port A to port B.

  2.  Check that air flows from port A to port C.

If the result is not as specified, replace the charcoal canister.

NOTICE: Incorrect electrode connection causes damage to the VSV.

Pay due attention when connecting the lead wire.

4. INSPECT CHARCOAL CANISTER ASSY (PZEV)

4. INSPECT CHARCOAL CANISTER ASSY (PZEV)

a. Visually check the charcoal canister for cracks or damage.

b. Inspect the charcoal canister operation.

b. Inspect the charcoal canister operation.

1. While holding the purge port closed, blow air (0.39 kPa, 4.0 gf/cm2, 0.06 psi) into the vent port, and check that air flows from the air line port.

2. While holding the air line port closed, blow air (0.39

2. While holding the air line port closed, blow air (0.39 kPa, 4.0 gf/cm2, 0.06 psi) into the vent port, and check that air flows from the purge port.

3. While holding the air line port closed, apply vacuum

3. While holding the air line port closed, apply vacuum (3.43 kPa, 25.7 gf/cm2, 1.01 psi) to the vent port, and check that air is sucked in from the purge port.

If operation is not as specified, replace the charcoal canister.

c. Inspect air tightness.

c. Inspect air tightness.

1. While holding the vent and air line ports closed, apply vacuum (3.43 kPa, 25.7 gf/cm2, 1.01 psi) to the purge port, and check that the vacuum is maintained for 1 minute.

HINT: In order to maintain air tightness, this check should be performed with the CCV terminal port held closed by your fingers.

If operation is not as specified, replace the charcoal canister.

d. Inspect the diaphragm.

d. Inspect the diaphragm.

  1. Remove the air hose between ports A and B.

  2. While holding the vent, purge and air line ports closed, apply vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port A, and check that air is sucked in from port B.

3. While holding the vent, purge and air line ports

3. While holding the vent, purge and air line ports closed, apply vacuum (1.42 kPa, 11 mmHg, 0.42 in.Hg) into port A, and measure how long it takes for vacuum to drop.

Vacuum drop time: 10 sec. or more

If operation is not as specified, replace the charcoal canister.

4. Reinstall the air hose between ports A and B.

e. Check the VSV for open circuit.

e. Check the VSV for open circuit.

1. Measure the resistance between the terminals.

Standard:

If the result is not as specified, replace the charcoal

If the result is not as specified, replace the charcoal canister.

f. Check VSV operation.

f. Check VSV operation.

1. Check that air flows from port A to ports B and C.

If the result is not as specified, replace the charcoal canister.

  1.  Apply battery positive voltage across the terminals.

  2. Check that the valve is closed.

If the result is not as specified, replace the charcoal canister.

NOTICE: Incorrect electrode connection causes damage to the VSV.

Pay due attention when connecting the lead wire.

  1. Check that air does not flow from port A to port B.

  2. Check that air flows from port A to port C.

If the result is not as specified, replace the charcoal canister.

NOTICE: Incorrect electrode connection causes damage to the VSV.

Pay due attention when connecting the lead wire.

5. INSPECT VACUUM SWITCHING VALVE ASSY FOR

5. INSPECT VACUUM SWITCHING VALVE ASSY FOR EVAP

a. Check the VSV for open circuit.

1. Measure the resistance.

If the resistance is not as specified, replace the VSV assy.

If the resistance is not as specified, replace the VSV assy.

b. Check VSV operation.

b. Check VSV operation.

1. Check that air does not flow from the port as shown in the illustration.

  1. Apply battery positive voltage across the terminals.

  2. Check that air flows from the ports.

If the result is not as specified, replace the VSV assy.

6. INSPECT AIR FUEL RATIO

6. INSPECT AIR FUEL RATIO

a. Measure the resistance between terminals 1 (HT) and 2 (+B).

Standard

:

If the result is not as specified, replace the .

If the result is not as specified, replace the .

7. INSPECT HEATED OXYGEN  (BANK 1

7. INSPECT HEATED OXYGEN (BANK 1 2)

a. Measure the resistance between terminals 1 (HT) and 2 (+B).

Standard

:

If the result is not as specified, replace the .

If the result is not as specified, replace the .

Engine control system

    More about Emission control:

    Emission control system (2AZ−FE)(From July, 2003)

    Charcoal canister assy (2AZ−FE)(From July, 2003)

    Ventilation valve sub-assy (2AZ−FE)(From July, 2003)

    Emission control system (1MZ−FE/3MZ−FE)

    Charcoal canister assy (1MZ−FE/3MZ−FE)

    Ventilation valve sub-assy (1MZ−FE/3MZ−FE)

    Emission control system (2AZ−FE)(From July, 2003)

    Toyota Camry Service Manual / Emission control / Emission control system (2AZ−FE)(From July, 2003)

    Toyota Camry Service Manual

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