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Fuel Tank Inspection: 2WD

WARNING: This page is about a different car, the 2017 Mazda CX-9. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform the following procedure to verify the fuel tank airtightness.
    1. Plug the fuel pump unit pipe, ports B and C.
      Fig 1: Plugging Fuel Pump Unit Pipe Ports B And C
      G11436366Courtesy of MAZDA MOTORS CORP.
    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 flow leakage from the fuel tank.
  2. Plug the fuel pump unit pipe and port B.
    Fig 2: Plugging Fuel Pump Unit Pipe And Port B
    G11436367Courtesy of MAZDA MOTORS CORP.
  3. Level the fuel tank.
  4. Apply a pressure of 3 kPa {23 mmHg, 0.9 inHg} to port A and wait for a while.
  5. With the pressure still applied, verify that there is air flow from port C and the pressure is 0-3 kPa {0-23 mmHg, 0-0.9 inHg}.
  6. Apply a pressure of -0.5 kPa {-3.8 mmHg, -0.1 inHg} to port A and wait for a while.
  7. With the pressure still applied, verify that there is air flow from port C and the pressure is -0.5-0 kPa {-3.8-0 mmHg, -0.1-0 inHg}.
  8. Apply a pressure to port A and wait for a while.
    Fig 3: Plugging Port B To Fuel Pump Unit
    G11436368Courtesy of MAZDA MOTORS CORP.
  9. With the pressure still applied, verify that there is no air flow from port C.
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