Главная Automobile - Toyota Toyota Sequoia - Repair manual 2005 year
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A23480 Fuel Tank Canister Vacuum Pump: OFF Pressure Sensor 0.02 Inch Orifice Pump Module Operation A: Atmospheric Pressure Measurement Vent Valve: OFF (vent) Operation D: Purge VSV monitor Operation B: 0.02 Inch Leak Pressure Measurement Negative Atmospheric Operation C: EVAP Leak Check Air Filter Purge VSV: OFF OFF (vent) ON OFF OFF ON ON (closed) ON ON ON (closed) – DIAGNOSTICS ENGINE DI–411 605 MONITOR DESCRIPTION 5 hours* after the ignition switch is turned OFF, the electric vacuum pump creates negative pressure (vacu- C (95 F) 5 hours after the ignition switch is turned off, the monitor check starts 2 hours later. If it is still not below 35 C (95 F) 7 hours after the ignition switch is turned off, the monitor check starts 2.5 hours later. Sequence Operations Descriptions Duration – ECM activation Activated by soak timer, 5 hours (7 or 9.5 hours) after ignition switch turned to OFF. – A Atmospheric pressure Vent valve turned OFF (vent) and EVAP system pressure measured by ECM in order to 10 seconds B First 0.02 inch leak In order to determine 0.02 inch leak pressure standard, vacuum pump creates negative pres- 60 seconds C EVAP system pres- Vent valve turned ON (closed) to shut EVAP system. 15 minutes* D Purge VSV monitor Purge VSV opened and then EVAP system pressure measured by ECM. 10 seconds E Second 0.02 inch leak Leak check is performed after second 0.02 inch leak pressure standard is measured. 60 seconds F Final check Atmospheric pressure measured and then monitoring result recorded by ECM. – * If only a small amount of fuel is in the fuel tank, it takes longer for the EVAP pressure to stabilize. |