Component Inspection
INSPECTION1. 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 and check that the 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 and check that the air does not pass through freely.
If the operation is not as specified, replace the ventilation valve.
2. INSPECT FUEL TANK CAP ASSEMBLY
a. Check the appearance.
1. Visually check the fuel tank cap and gasket for any deformation and damage.
If necessary, repair or replace the cap and/or gasket.
3. INSPECT CHARCOAL CANISTER ASSEMBLY
a. Visually check the charcoal canister for cracks and damage.
If there is any cracks or damage, replace the charcoal canister assembly.
b. Check the charcoal canister operation.
1. While holding the purge port closed, blow air at 1.67 kPa (17.0 gf/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 for 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 air inlet port closed with your fingers, leave port A open and apply pressurized air at 19.6 kPa (0.2 kgf/sq.cm, 2.81 psi) into the vent port. Check that the pressure is retained.
If the result is not as specified, replace the charcoal canister assembly.
d. Check the 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.
4. INSPECT VACUUM SWITCHING VALVE ASSEMBLY NO.1
a. Check the resistance.
1. Using an ohmmeter, measure the resistance between the terminals.
If the result is not as specified, replace the vacuum switching valve No.1.
b. Check the vacuum switching valve No.1 for ground.
1. Using an ohmmeter, check the resistance between each terminal and the body.
If the result is not as specified, replace the vacuum switching valve No.1.
c. Check the operation.
1. Check that air does not flow from port E to port F.
If the operation is not as specified, replace the vacuum switching valve No.1.
2. Apply battery voltage across the terminals.
3. Check that air flows from port E to port F.
If the operation is not as specified, replace the vacuum switching valve No.1.
5. INSPECT AIR FUEL RATIO SENSOR (BANK 1,BANK 2 AIR FUEL RATIO SENSOR)
a. Check the resistance. (Bank 1 Sensor 1)
1. Using an ohmmeter, measure the resistance between the terminals.
6. INSPECT HEATED OXYGEN SENSOR (BANK 1,BANK 2 OXYGEN SENSOR)
a. 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.