Charcoal Canister (Tacoma & 4Runner)
- Remove charcoal canister. See Figure-96. Inspect charcoal canister for cracks or damage. Remove Vacuum Switching Valves (VSV) from top of charcoal canister.
- Install plugs on ports "A" and "B". See Figure-107. Check for clogged filter and/or stuck check valve or diaphragm by applying.21 psi (.015 kg/cm2 ) air pressure to port "D" while holding port "C" closed. See Figure-107. Ensure air flows freely from port "E".
- Apply.21 psi (.015 kg/cm2 ) air pressure to port "D" while holding ports "C" and "E" closed. See Figure-107. Ensure no air flows from port "F".
- Using vacuum pump, apply.87 in. Hg of vacuum to port "C". Ensure vacuum does not decrease when port "F" is closed, and that vacuum decreases with port "F" is opened.
- While holding port "F" closed, use vacuum pump to apply.87 in. Hg of vacuum to port "D". Ensure vacuum does not decrease when port "C" is closed, and that vacuum decreases with port "C" is opened. Remove plugs. Replace charcoal canister if defective.