NO.28 FUEL FILLING SHUT OFF ISSUES [AJ]


28	Fuel filling shut off issues
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 performing the fuel system services: - 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 [AJ].) (See AFTER SERVICE PRECAUTION [AJ].)


STEP	INSPECTION		ACTION
1	• Retrieve DTCs. • Are there any DTCs displayed?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J# 300001-301513).) (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7# 307683-, JM8 LW28J# 301514-, JM8 LW28A# 301514- (Assumed)).)
1	• Retrieve DTCs. • Are there any DTCs displayed?	No	Go to the next step.
2	• Remove the fuel-filler pipe. • Make sure that 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. • Inspect fuel shut-off valve.
2		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 or reprogram the PCM.