Fuel Tank Inspection

NOTE:

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

Follow "BEFORE SERVICE PRECAUTION" before performing any work operations to prevent fuel from spilling from the fuel system. (See BEFORE SERVICE PRECAUTION ).
Remove the battery cover. (See BATTERY REMOVAL/INSTALLATION [L3 WITH TC] .)
Disconnect the negative battery cable.
Remove the fuel tank. (See FUEL TANK REMOVAL/INSTALLATION ).
Level the fuel tank.
Perform the following procedure to verify the fuel tank airtightness.
1. Plug the fuel pump unit pipe, ports B and C.
2. Apply a pressure 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.
    
    Fig 1: Identifying Fuel Pump Unit Pipe Ports
    Courtesy of MAZDA MOTORS CORP.
Apply a pressure to port A and wait for a while.
With the pressure still applied, verify that there is airflow from port B and C.
- If there is no airflow from either port, replace the fuel tank.
Place the fuel tank upside down.

Fig 2: Identifying Fuel Pump Unit Pipe Ports
Courtesy of MAZDA MOTORS CORP.
Apply a pressure to port A and wait for a while.
With the pressure still applied, verify that there is no airflow from port B and C.
- If there is airflow from either port, replace the fuel tank.
  
  Fig 3: Identifying Fuel Pump Unit Pipe Ports
  Courtesy of MAZDA MOTORS CORP.