EVAP Vacuum Leak Pump Assembly
| Callout | Component Name |
|---|---|
| 1 | Leak Pump Assembly Electrical Connector |
| 2 | EVAP Canister Vent Solenoid Valve |
| 3 | Fresh Air Inlet Port |
| 4 | EVAP Canister Port |
| 5 | O-ring Seal |
| 6 | Vacuum Pump |
| 7 | Vacuum Leak Pump Motor |
| 8 | FTP Sensor |
The EVAP vacuum leak pump assembly contains the fuel tank pressure (FTP) sensor, the canister vent solenoid valve, and an electric motor driven vacuum pump. The vacuum pump provides pressure for leak testing when the engine has been OFF for at least five hours and the engine coolant temperature (ECT) is less than 35°C (95°F). If the ECT is greater than 35°C (95°F) after five hours, the diagnostic will wait an additional two hours. If the ECT is still greater than 35°C (95°F) after seven hours, the diagnostic will wait an additional two and a half hours. The pump assembly also has several internal filters and a 0.5 mm (0.020 inch) reference orifice. The reference orifice provides controlled movement of the pressure within the system, enabling the FTP sensor to accurately monitor system performance. The complete pump assembly is mounted on the EVAP canister, eliminating the need for additional hoses or lines for connections.