OBD II Regulation Vehicle

NOTE:

This inspection is for fuel shut-off valve and two rollover valves integrated in the fuel tank.

Disconnect the plastic fuel hose and the fuel pump unit connector. (See FUEL PUMP UNIT REMOVAL/INSTALLATION .)
Remove the fuel tank with the fuel pump unit. (See FUEL TANK REMOVAL/INSTALLATION .)
Plug the fuel main pipe of the fuel pump unit.
Plug port C.
Level the fuel tank.

Fig 1: Identifying Fuel Pump Unit Components (OBD II Regulation Vehicle) (1 Of 2)
Courtesy of MAZDA MOTORS CORP.
Blow through port B and verify that there is airflow from port A.
- If there is no airflow, replace the fuel tank.
- If there is airflow, turn the fuel tank upside-down, and proceed to next step.
Blow through port B and verify that there is no airflow from port A.
- If there is airflow, replace the fuel tank.
Fig 2: Identifying Fuel Pump Unit Components (OBD II Regulation Vehicle) (2 Of 2)
Courtesy of MAZDA MOTORS CORP.