Component Inspection

INSPECTION

1. 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 the cap.
2. While holding the purge port closed, blow air (1.76 kPa, 18 gf/sq.cm, 0.26 psi) into the EVAP port to check that air flows from the air drain port.




3. While holding the purge port and the air drain port closed, blow air (1.76 kPa, 18 gf/sq.cm, 0.26 psi) into the EVAP port to check that air does not flow from the air inlet port.




4. Apply a vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg) 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.

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




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 result is not as specified, replace the charcoal canister.

6. Remove the cap from vent port.

2. INSPECT VACUUM SWITCHING VALVE ASSY FOR ACIS







a. Measure the VSV resistance.




b. Check VSV operation.
1. Check that air does not flow from port E to port F.
If the result is not as specified, replace the VSV assy.




2. Apply battery positive voltage across the terminals.
3. Check that air flows from port E to port F.
If the result is not as specified, replace the VSV assy.

3. INSPECT VACUUM SWITCHING VALVE ASSY FOR PRESSURE SWITCHING VALVE







a. Measure the VSV resistance.




b. Check VSV operation.
1. Check that air does not flow from port E to port F.




2. Apply battery positive voltage across the terminals.
3. Check that air flows from port E to port F.
If the result is not as specified, replace the VSV assy.

4. INSPECT VENTILATION VALVE SUB-ASSY




a. Install a clean hose to the ventilation valve.
b. Inspect ventilation valve operation.
1. Blow air from the cylinder head side of the engine, and check that air passes through easily.

CAUTION: Do not suck air through the valve. Petroleum substances stuck to the valve is harmful.




2. Blow air from the intake manifold side of the engine, and check that air passes through with difficulty.

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

c. Remove the clean hose from the ventilation valve.

5. INSPECT FUEL TANK CAP ASSY




a. Visually check if cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.

6. INSPECT VACUUM SWITCHING VALVE ASSY FOR EVAP







a. Measure the VSV resistance.




b. Check VSV operation.
1. Check that air does not flow from port E to port F.
If the result is not as specified, replace the VSV assy.




2. Apply battery positive voltage across the terminals.
3. Check that air flow from port E to port F.
If the result is not as specified, replace the VSV assy.

7. INSPECT VACUUM SWITCHING VALVE ASSY FOR CCV







a. Measure the VSV resistance.




b. Check 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 the result is not as specified, replace the VSV assy.