Nonreturn Valve Inspection - Mazda 3 Workshop Manual

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• If there is no airflow, replace the fuel tank.
9. Apply a pressure of -0.5 kPa {-3.7 mmHg, -0.1 inHg} to port A and wait for a while.
10. With the pressure still applied, verify that there is airflow from port C and the pressure is 0- -0.5 kPa
{0- -3.7 mmHg, 0- -0.1 inHg}.
• If there is no airflow, replace the fuel tank.
• If there is airflow, place the fuel tank upside down.
11. Apply a pressure of 3 kPa {22 mmHg, 0.8 inHg} to port A and wait for a while.
12. With the pressure still applied, verify that there is no airflow from port C.
• If there is airflow, replace the fuel tank.

NONRETURN VALVE INSPECTION

1. Remove the fuel-filler pipe. (See
2. Move the valve and verify that the valve opens to 90°.
• If it does not open, replace the fuel-filler pipe.
3. Verify that the nonreturn valve returns to the normal position by spring force.
• If it does not return, replace the fuel-filler pipe.
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FUEL TANK REMOVAL/INSTALLATION.)
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