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off, the monitor check starts 2 hours later. If it is still not below 35°C (95°F) 7 hours after the ignition 2. Purge flow monitor The purge flow monitor consists of 2 monitors. The 1st monitor is conducted every time and the 2nd The 1st monitor While the engine is running and the purge VSV (Vacuum Switching Valve) is ON (open), the ECM The 2nd monitor The vent valve is turned OFF (open) and the EVAP pressure is measured. If the variation in the Atmospheric pressure check: In order to ensure reliable malfunction detection, the variation between the atmospheric pressures, before and Fig. 247: EVAP Purge Flow Diagram
2008 Toyota Tundra 2008 ENGINE PERFORMANCE Engine Control System (2UZ-FE) - Tundra
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