Inspection

INSPECTION

1. INSPECT VENTILATION VALVE SUB-ASSY




a. Install a clean hose to the ventilation valve.
b. Inspect the ventilation valve operation.
1. Blow air into the cylinder head side, and check that 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 that air passes through with difficulty.
If the operation is not as specified, replace the ventilation valve.

c. Remove the clean hose from the ventilation valve.

2. INSPECT FUEL TANK CAP ASSY




a. Visually check if the cap or gasket is deformed or damaged.

3. INSPECT CHARCOAL CANISTER ASSY




a. Visually check the charcoal canister for cracks or damage.
b. Inspect the charcoal canister operation.




1. Plug the vent port with a cap.




2. While holding the purge port closed, blow air (1.76 kPa, 18 gf/sq.cm, 0.26 psi) into the EVAP port and check that air flows from the air inlet port.
3. Plug the air inlet port with your finger.




4. Apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg), check that the vacuum decreases when the air inlet port is opened.




5. While holding the air inlet port closed, apply vacuum (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.







c. Inspect the VSV for open circuit.
1. Using an Ohmmeter, check the resistance between the terminals.
If the resistance is not as specified, replace the VSV.




d. Inspect the VSV for ground.
1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
If there is continuity, replace the VSV.




e. Inspect the VSV operation.
1. Check that air flows from port A to port B.




2. Apply battery positive voltage across the terminals.
3. Check that air does not flow from port A to port B.
If operation is not as specified, replace the VSV.

4. INSPECT DUTY VACUUM SWITCHING VALVE




a. Inspect the VSV for open circuit.
1. Using an ohmmeter, check resistance between the terminals.

Resistance: 30 to 34 Ohms at 20°C (68°F)

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




b. Inspect the VSV for ground.
1. Using an ohmmeter, check that there is no continuity between each terminal and the body.
If there is continuity, replace the VSV.




c. Inspect the VSV operation.
1. Check that air flows with difficulty from port E to port F.
2. Apply battery voltage across the terminals.
3. Check that air flows from port E to port F.
If operation is not as specified, replace the VSV.

5. INSPECT HEATED OXYGEN SENSOR (BANK1 OXYGEN SENSOR)







a. Using an Ohmmeter, check for continuity between the terminals.
If result is not as specified, replace the sensor.

6. INSPECT HEATED OXYGEN SENSOR (BANK1 OXYGEN SENSOR NO.2)







a. Using an ohmmeter, check for continuity between the terminals.
If result is not as specified, replace the sensor.