Mazda CX-9 Grand Touring 2009 Manual page 1380

Remove the fuel-filler pipe.
Make sure the nonreturn valve is installed
2 properly.
Inspect nonreturn valve operation.
Is the nonreturn valve normal?
Verify test results.
If normal, return to diagnostic index to service any additional symptoms.
(See SYMPTOM DIAGNOSTIC INDEX [MZI-3.7].)
If malfunction remains, inspect related Service Bulletins and/or On-line Repair
3
Information and perform repair or diagnosis.
NO.28 FUEL FILLING SHUT OFF CONCERNS [MZI-3.7]
NO.28 FUEL FILLING SHUT OFF CONCERNS (MZI-3.7) DETECTION CONDITIONS AND
POSSIBLE CAUSES
28 FUEL FILLING SHUT OFF CONCERNS
DESCRIPTION
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
If vehicle is repaired, troubleshooting completed.
If vehicle is not repaired or additional diagnostic information is not available,
replace the PCM.
(See PCM REMOVAL/INSTALLATION [MZI-3.7] .)
Fuel does not shut off properly.
Clogged EVAP pipes
Nonreturn valve malfunction
Fuel shut-off valve malfunction
Fuel nozzle malfunction
Fuel nozzle is not inserted correctly.
WARNING:
The following troubleshooting flow chart contains the fuel system
diagnosis and repair procedures. Read the following warnings before
servicing the fuel system:
Fuel vapor is hazardous. It can easily ignite, causing serious
injury and damage. Always keep sparks and flames away from
Inadequate fuel filling speed
Nonreturn valve is installed improperly:
Reinstall nonreturn valve to proper
No
Nonreturn valve does not operate
properly:
Replace nonreturn valve.
position.