4 Runner 2WD L4-2693cc 2.7L DOHC MFI (1997)
Evaporative Emission Control Canister: Testing and Inspection
EVAPORATIVE EMISSION CONTROL CANISTER INSPECTION
1. Visually inspect charcoal canister.
Look for cracks or damage.
2. Check for clogged filter, and stuck check valve and diaphragm.
(a) Install the plugs to ports A and B.
(b) While holding port C closed, blow air (1.47 kPa, 15 gf/sq. cm, 0.21 psi) into port D and check that air flows from port E.
(c) While holding port C and port E closed, blow air (1.47 kPa, 15 gf/sq. cm, 0.21 psi) into port D and check that air does not flow from port F.
(d) Apply vacuum (2.94 kPa, 22 mmHg, 0.87 in.Hg) to port C, check that the vacuum does not decrease when port F is closed, and check that the
vacuum decreases when port F is released.
