NO.28 FUEL FILLING SHUT OFF CONCERNS [MZI-3.7]

id0103d2912000

28

FUEL FILLING SHUT OFF CONCERNS
DESCRIPTION
•  Fuel does not shut off properly.
POSSIBLE CAUSE
•  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 fuel.
―  Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete “BEFORE SERVICE PRECAUTION” and “AFTER SERVICE PRECAUTION” described in this manual. (See BEFORE SERVICE PRECAUTION [MZI-3.7].)(See AFTER SERVICE PRECAUTION [MZI-3.7].)
Caution
•  Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Turn the ignition switch to the ON position (Engine off).
Retrieve any PCM DTCs using the M-MDS.
(See ON-BOARD DIAGNOSTIC TEST [MZI-3.7 (PCM CONNECTOR (2 TYPES))].)
(See ON-BOARD DIAGNOSTIC TEST [MZI-3.7 (PCM CONNECTOR (3 TYPES))].)
Are there any DTCs displayed?
Yes
DTC is displayed:
•  Go to the appropriate DTC inspection.
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
•  Fuel is not inserted correctly.
•  Fuel shut-off valve
Repair or replace the malfunctioning part according to the inspection results.
No
Nonreturn valve is installed improperly:
•  Reinstall the nonreturn valve to proper position.
Nonreturn valve does not operate properly:
•  Replace the nonreturn valve.
3
•  Verify test results.
―  If normal, return to diagnostic index to service any additional symptoms.
―  If malfunction remains, inspect related Service Information and perform repair or diagnosis.
•  If vehicle is repaired, troubleshooting completed.
•  If vehicle is not repaired or additional diagnostic information is not available, replace the PCM.