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HINT: The vent valve is built into the canister pump module. DESCRIPTION The description can be found in the EVAP (Evaporative Emission) System (See DESCRIPTION ). INSPECTION PROCEDURE Refer to the EVAP SYSTEM . MONITOR DESCRIPTION 5 hours* after the ignition switch is turned OFF, the leak detection pump creates negative pressure (vacuum) in HINT: *: If the engine coolant temperature is not below 35°C (95°F) 5 hours after the ignition switch is turned OFF, MONITOR DESCRIPTION CHART P2420 Vent valve Following condition met EVAP pressure Canister pump module Connector/wire harness ECM While 2 trip Sequence Operation Description Duration - ECM activation Activated by soak timer 5,7 or 9.5 hours after ignition switch - A Atmospheric Vent valve turned OFF (vent) and EVAP system pressure 10 seconds B First reference In order to determine reference pressure, leak detection pump 60 seconds Vent valve turned ON (closed) to shut EVAP system.
2008 Toyota Tundra 2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra
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