Component Inspection

INSPECTION

1. INSPECT CHARCOAL CANISTER ASSEMBLY




a. Visually check the charcoal canister for cracks or damage.
If cracks or damage are found, replace the charcoal canister assembly.




b. Check charcoal canister operation.
1. While holding the purge port closed, blow air at 1.67 kPa (17.0 kgf/sq.cm, 0.24 psi) into the vent port, and check that the air flows from the air inlet port.
If the result is not as specified, replace the charcoal canister assembly.




2. While holding the vent port closed, apply a vacuum of 1.10 kPa (8.3 mmHg, 0.32 in.Hg) into the purge port, and check that the air flows from the air inlet port.
If the result is not as specified, replace the charcoal canister assembly.




c. Check the air leakage.
1. Remove the air hose between ports A and B.
2. Connect the pressure gauge to the vent port of the charcoal canister.

SST 09992-00242

3. While holding port B, the purge port and the air inlet port closed and port A open, apply pressurized air at 19.6 kPa (0.2 kgf/sq.cm, 2.81 psi) into the vent port, then confirm that the pressure is retained.
If the result is not as specified, replace the charcoal canister assembly.




d. Check leak detection pump.
1. Check that air flows from port A to ports B and C.
If the result is not as specified, replace the pump module.




2. Apply battery positive voltage across the terminals.
3. Check that the valve is closed.
If the result is not as specified, replace the pump module.




2. INSPECT VENTILATION VALVE SUB-ASSEMBLY
a. Check the operation.
1. Install a clean hose as shown in the illustration.
2. Blow air into the cylinder head side, then check that air passes through freely.

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




3. Blow air into the intake manifold side, then check that air does not pass through freely.
If the operation is not as specified, replace the ventilation valve.




3. INSPECT FUEL TANK CAP ASSEMBLY
a. Check the appearance.
1. Visually check whether the fuel tank cap and gasket are deformed or damaged.
If necessary, repair or replace the cap and/or gasket.

4. INSPECT VACUUM SWITCHING VALVE ASSEMBLY NO.1
a. Check the resistance.







1. Using an ohmmeter, measure the resistance between the terminals.
If the resistance is not as specified, replace the VSV.







2. Using an ohmmeter, measure the resistance between the terminal and body.
If the resistance is not as specified, replace the VSV.




b. Check the operation.
1. Check that air flows from port A to port B.
If the operation is not as specified, replace the VSV.




2. Apply battery 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.

5. INSPECT HEATED OXYGEN SENSOR







a. Check the resistance. (Bank 1 Sensor 1)
1. Using an ohmmeter, measure the resistance between the terminals.
If the result is not as specified, replace the heated oxygen sensor.







b. Check the resistance. (Bank 1 Sensor 2)
1. Using an ohmmeter, measure the resistance between the terminals.
If the result is not as specified, replace the heated oxygen sensor.