Supra L6-2997cc 3.0L DOHC MFI (1998)
Evaporative Emission Control Canister: Testing and Inspection
INSPECTION
1. VISUALLY INSPECT CHARCOAL CANISTER
Look for cracks or damage.
2. CHECK FOR CLOGGED FILTER, AND STUCK CHECK VALVE AND DIAPHRAGM
(a) While holding port B closed, blow air (1.76 kPa (18 gf/Sq. cm, 0.26 psi)) into port A and check that air flows from port D.
(b) While holding port B and port D closed, blow air (1.76 kPa (18 gf/Sq. cm, 0.26 psi)) into port A and check that air does not flow from port C.
(c) Apply vacuum (3.43 kPa (26 mmHg, 1.01 in.Hg)) to port B, check that the vacuum does not decrease when port C is closed, and check that the
vacuum decreases when a port C is released.