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. While holding the air inlet port closed, apply vacuum (3.43 kPa, 25.7 mmHg, 1.01 in.Hg) to the purge port to check that the vacuum does not decrease. And then, release the air inlet port to check that the vacuum decreases.
5. While holding the air inlet port closed, apply vacuum (3.43 kpa, 25.7 mmHg, 1.01 in.Hg) to the EVAP port to check that air flows into the purge port.
If the operation is not as specified, replace the charcoal canister.
6. Remove the hose and cap from the vent port.
c. Inspect the VSV for the pressure switching valve ASSY.
1. Using an ohmmeter, check the resistance between the terminals.
Resistance: 37 - 44 Ohm at 20 °C (68 °F)
If the resistance is not as specified, replace the VSV.
2. Using an ohmmeter, check that there is no continuity between each terminal and the body ground.
If there is continuity, replace the VSV.
3. Check that air does not flow from port E to port F.
4. Apply battery positive voltage across the terminals.
5. Check that air flows from port E to port F.
If the operation is not as specified, replace the VSV.
d. Inspect the VSV for the pressure switching valve ASSY
1. Using an ohmmeter, check the resistance between the terminals.
Resistance: 37 - 44 Ohm at 20 °C (68 °F)
If the resistance is not as specified, replace the VSV.
2. Using an ohmmeter, check that there is no continuity between each terminal and the body ground.
If there is no continuity, replace the VSV.
3. Check that air does not flow from port E to port F.
4. Apply battery positive voltage across the terminals.
5. Check that air flows from port E to port F
If the operation is not as specified, replace the VSV.
2. VENTILATION VALVE SUB-ASSY
a. Install a clean hose to the PCV valve.
b. Inspect the PCV 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 operation is not as specified, replace the PCV valve.
c. Remove the clean hose from the PCV valve.
3. FUEL TANK CAP ASSY
Visually check if cap and/or gasket are deformed or damaged.
If necessary, repair or replace the cap.
4. INSPECT VACUUM SWITCHING VALVE ASSY
Inspect the VSV for the evaporative emission (EVAP)
1. Using an ohmmeter, check the resistance between the terminals.
Resistance: 27 - 33 Ohm at 20 °C (68 °F)
If the resistance is not as specified, replace the VSV
2. Using an ohmmeter, check that there is no continuity between each terminal and the body ground.
If there is continuity, replace the VSV.
3. Check that air flows from port E to port F.
4. Apply battery positive voltage across the terminals.
5. Check that air does not flow from port E to port F. If the operation is not as specified, replace the VSV.
5. VACUUM SWITCHING VALVE ASSY NO.1
Inspect the VSV for the canister closed valve (CCV).
1. Using an ohmmeter, check the resistance between the terminals.
Resistance: 25 - 30 Ohm at 20 °C (68 °F)
If the resistance is not as specified, replace the VSV.
2. Using an ohmmeter, check that there is no continuity between each terminal and the body ground.
If there is continuity, replace the VSV.
3. Check that air flows from port A to port B.
4. Apply battery positive voltage across the terminals.
5. Check that air does not flow from port A to port B.
If the operation is not as specified, replace the VSV.