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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda RX-8. However, it is still accessible from the selected car via links, so may be relevant.
NO.27 FUEL REFILL CONCERNS DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 Connect the WDS or equivalent to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?		 Yes DTC is displayed: 
Go to the applicable DTC inspection.
(See DTC TABLE .)
No No DTC is displayed: 
Go to the next step.
2 Remove the fuel-filler pipe.
Make sure the nonreturn valve is installed properly.
Inspect the nonreturn valve operation.
Is the nonreturn valve normal?		 Yes Inspect for the following:
  • Improper use of fuel nozzle
  • Inadequate fuel filling speed
No Nonreturn valve is installed improperly: 
Reinstall the nonreturn valve to the proper position.
Nonreturn valve does not operate properly: 
Replace the nonreturn valve.
3
  • Verify test results.
    • If normal, return to the diagnostic index to service any additional symptoms.
    • If the malfunction remains, inspect the related Service Bulletins and/or the On-line Repair Information and perform the repair or diagnosis.
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