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Home >> Mazda >> 2024 >> CX-90 Turbo Select >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 7 (Fuel System (VIN A)) >> Sealed Fuel Tank Inspection [PYUL] >> Inspect Fuel Tank

Inspect Fuel Tank

WARNING: This page is about a different variant/trim than selected.
WARNING:
  • Fuel can easily ignite, therefore always keep sparks and flames away from fuel. If fuel ignites, it could cause serious injury or death and damage to facilities.
  • Highly pressurized fuel may spray out if the fuel line is cut. Due to the following dangers occurring with a fuel spray, always complete the [Fuel Line Safety Procedure] to prevent the fuel from spraying.
    • Fuel may cause irritation if it comes in contact with skin and eyes.
    • If fuel ignites and causes a fire, it may lead to serious injury or death, and damage to property and facilities.
  • A person charged with static electricity could cause a fire or explosion, resulting in death or serious injury. Before draining the fuel, always discharge static electricity by touching a vehicle.
NOTE:
  • The rollover valve built into the fuel tank, and fuel tank leakage are inspected in this inspection.
  • Perform the procedure with the vehicle level.
  • Perform the [Fuel Line Safety Procedure] referring to [BEFORE SERVICE PRECAUTION]. (See FUEL DRAINING PROCEDURE [PYUL] ).
  1. Drain the fuel. (See FUEL DRAINING PROCEDURE [PYUL] )
  2. Remove the fuel tank and the fuel pump unit as a single unit. (See SEALED FUEL TANK REMOVAL/INSTALLATION [PYUL] )
  3. Perform the following procedure to verify the sealing of the fuel tank.
    1. Plug the fuel pump unit pipe and Ports B and C.
      G16702559Courtesy of MAZDA MOTORS CORP.
      COMPONENT OPERATIONS

      Component No. Refer to
      1 Port A
      2 Plug (Port B)
      3 Plug (Port C)
      4 Plug (fuel pump unit pipe)
    2. Apply 5.9 kPa {0.060 kgf/cm2 , 0.86 psi} of pressure to Port A and leave it as is for a while.
    3. Verify that the pressure does not change and that no air is leaking from the fuel tank.
  4. Level the fuel tank.
  5. Apply 5.9 kPa {0.060 kgf/cm2 , 0.86 psi} of pressure to Port A and leave it as is for a while.
    G16702559Courtesy of MAZDA MOTORS CORP.
    COMPONENT OPERATIONS

    Component No. Refer to
    1 Port A
    2 Plug (Port B)
    3 Plug (Port C)
    4 Plug (fuel pump unit pipe)
  6. Open Port C and verify that the pressure decreases from 5.9 kPa {0.060 kgf/cm2 , 0.86 psi}.
  7. Close Port A and apply -2.0 kPa {-0.020 kgf/cm2 , -0.29 psi} of negative pressure to Port A and leave it as is for a while.
  8. Open Port C and verify that the negative pressure approaches close to positive pressure from -2.0 kPa {-0.020 kgf/cm2 , -0.29 psi}.
  9. Turn the fuel tank upside down.
  10. Apply 5.9 kPa {0.060 kgf/cm2 , 0.86 psi} of pressure to Port A and leave it as is for a while.
  11. Verify that there is no change in pressure and no air is leaking from Port C.
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