Fuel Injector Operation Inspection

If simulation function of M-MDS is used:

STEP	INSPECTION		ACTION
1	Start the engine and warm it up completely. Access the INJ_1, INJ_2, INJ_3 and INJ_4 PIDs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [SKYACTIV-G 2.5] .) Turn each fuel injector from on to off using the PIDs for each cylinder. Does the engine speed drop?	Yes	Fuel injectors work properly.
1		No	Engine speed does not drop an any cylinder: Go to the next step. Engine speed drops on some cylinders: Go to Step 4.
2	Perform the Main Relay Operation Inspection. (See MAIN RELAY OPERATION INSPECTION .) Does the main relay work properly?	Yes	Go to the next step.
2		No	Repair or replace the malfunctioning part according to the inspection results.
3	Inspect the fuel injector of the suspected cylinder. (See FUEL INJECTOR INSPECTION [SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
3		No	Inspect the fuel injector power and/or ground systems related wiring harness and connectors for the suspected cylinder. If all items normal: Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .) If not: Repair or replace the malfunctioning part according to the inspection results.
4	Perform the KOER self test using the M-MDS. (See KOEO/KOER SELF TEST [SKYACTIV-G 2.5] .) Are the DTCs P0201:00, P0202:00, P0203:00 and/or P0204:00 present?	Yes	Go to the appropriate DTC inspection. (See DTC P0201:00 [SKYACTIV-G 2.5] .) (See DTC P0202:00 [SKYACTIV-G 2.5] .) (See DTC P0203:00 [SKYACTIV-G 2.5] .) (See DTC P0204:00 [SKYACTIV-G 2.5] .)
4		No	Go to the next step.
5	Inspect the fuel injector of the suspected cylinder. (See FUEL INJECTOR INSPECTION [SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
5		No	Inspect the following for the suspected cylinder: PCM terminals (pulled-out pins, corrosion) Fuel injector terminals (pulled-out pins, corrosion) If all items normal: Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .) If not: Repair or replace the malfunctioning part according to the inspection results.

If simulation function of M-MDS is not used:

STEP	INSPECTION		ACTION
1	Perform the KOER self test using the M-MDS. (See KOEO/KOER SELF TEST [SKYACTIV-G 2.5] .) Are the DTCs P0201:00, P0202:00, P0203:00 and/or P0204:00 present?	Yes	Go to the appropriate DTC inspection. (See DTC P0201:00 [SKYACTIV-G 2.5] .) (See DTC P0202:00 [SKYACTIV-G 2.5] .) (See DTC P0203:00 [SKYACTIV-G 2.5] .) (See DTC P0204:00 [SKYACTIV-G 2.5] .)
1		No	Go to the next step.
2	Inspect the fuel injector of the suspected cylinder. (See FUEL INJECTOR INSPECTION [SKYACTIV-G 2.5] .) Is there any malfunction?	Yes	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)
2		No	Go to the next step.
3	Inspect the following for the suspected cylinder: Fuel injector power and/or ground system related wiring harnesses and connectors PCM terminals (pulled-out pins, corrosion) Fuel injector terminals (pulled-out pins, corrosion) Is there any malfunction?	Yes	Repair or replace the malfunctioning part according to the inspection results.
3		No	Replace the PCM. (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.5] .)