Diagnostic Procedure

STEP	INSPECTION		ACTION
1	VERIFY PCM DTC Retrieve any DTCs using the M-MDS. (Refer to ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Are any DTCs present?	Yes	Go to the applicable DTC inspection. (Refer to DTC TABLE [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
1		No	Go to the next step.
2	INSPECT EVAPORATIVE SYSTEM HOSES FOR RESTRICTION Inspect for restriction in the evaporative system hoses. Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
2		No	Go to the next step.
3	DETERMINE IF MALFUNCTION CAUSE IS NON-RETURN VALVE Remove the fuel-filler pipe. Make sure non-return valve is installed properly. Inspect the non-return valve operation. Is there any malfunction?	Yes	Replace the fuel tank. (Refer to FUEL TANK REMOVAL/INSTALLATION .)
3		No	Go to the next step.
4	DETERMINE IF MALFUNCTION CAUSE IS CHECK VALVE Inspect the check valve. (Refer to CHECK VALVE INSPECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the check valve. (Refer to CHECK VALVE REMOVAL/INSTALLATION .)
4		No	Inspect the following: Improper use of fuel nozzle Inadequate fuel filling speed Repair or replace the malfunctioning part according to the inspection results.
5	Verify the test results. If normal, return to the diagnostic index to service any additional symptoms. (Refer to SYMPTOM DIAGNOSTIC INDEX .) If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis. If the vehicle is repaired, troubleshooting is completed. If the vehicle is not repaired or additional diagnostic information is not available, reprogram the PCM if a later calibration is available. Retest.