ES 300 V6-3.0L (3VZ-FE) (1992)
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Thermal Vacuum Valve - EVAP: Description and Operation
Thermal Vacuum Valve (TVV)
PURPOSE
The Thermal vacuum valve (TVV) controls canister purge operation based on coolant temperature.
OPERATION
Below 40°C (104°F) the TVV is closed forcing fuel vapors to be absorbed into the canister. Above 59°C (138°F) the TVV is opened allowing vacuum to
flow through the TVV and purge the charcoal canister.
