Mazda CX-9 Grand Touring 2009 Manual page 1660

Fig. 21: Identifying Fuel Pump Unit & Plug (2WD)
Courtesy of MAZDA MOTORS CORP.
AWD
2. Apply a pressure of 3 kPa {23 mmHg, 0.9 inHg} to port A and wait for a while.
3. Verify that there is no air leakage from the fuel tank.
If there is airflow, replace the fuel tank.
9. Level the fuel tank.
10. Apply a pressure of 3 kPa {23 mmHg, 0.9 inHg} to port B and wait for a while.
11. With the pressure still applied, verify that there is airflow from port A and the pressure is 0-3 kPa {0-22
mmHg, 0-0.8 inHg}.
If malfunction, replace the fuel tank.
12. Apply a pressure of -0.5 kPa {-3.8 mmHg, -0.1 inHg} to port B and wait for a while.
Fig. 22: Identifying Fuel Pump Unit & Plug (4WD)
Courtesy of MAZDA MOTORS CORP.
13. With the pressure still applied, verify that there is airflow from port A and the pressure is -0.5-0 kPa {-
3.8-0 mmHg, -0.2-0 inHg}.
If malfunction, replace the fuel tank.
2008 Mazda CX-9 Grand Touring
2008 ENGINE Fuel System (MZI-3.7) - Mazda CX-9