Fuel Injector Operation Inspection

If simulation function of M-MDS is used:

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Start the engine and warm it up until normal operating temperature. Connect the M-MDS to the DLC-2. Select the INJ_1, INJ_2, INJ_3, and INJ_4 PIDs. Turn the fuel injector from on to off using the PIDs for each cylinder. Does the engine speed drop?	Yes	Fuel injector work properly.
1		No	Engine speed does not drop an any cylinder: Go to the next steps. 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 .) Is the fuel injector normal?	Yes	Inspect the following for the suspected cylinder. Fuel injector power and/or ground systems related wiring harness and connectors. If all items normal: Replace the PCM. (See PCM REMOVAL/INSTALLATION .)
3		No	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION .)
4	Perform the KOER self test function using the M-MDS. (See KOEO/KOER SELF TEST [L3 WITH TC] .) Are DTCs P0201:00, P0202:00, P0203:00 and/or P0204:00 present?	Yes	Go to the applicable DTC inspection. (See DTC P0201:00 .) (See DTC P0202:00 .) (See DTC P0203:00 .) (See DTC P0204:00 [L3 WITH TC] .)
4		No	Go to the next step.
5	Inspect the fuel injector of the suspected cylinder. (See FUEL INJECTOR INSPECTION .) Is the fuel injector normal?	Yes	Inspect the following for the suspected cylinder: PCM terminals (pulled-out pins, corrosion) Fuel injector terminals (pulled-out pins, corrosion) If all items are normal: Replace the PCM. (See PCM REMOVAL/INSTALLATION .)
5		No	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION .)

If simulation function of M-MDS is not used:

DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	Perform the KOER self test function using the M-MDS. (See KOEO/KOER SELF TEST [L3 WITH TC] .) Are DTCs P0201:00, P0202:00, P0203:00 and/or P0204:00 present?	Yes	Go to the appropriate DTC inspection. (See DTC P0201:00 .) (See DTC P0202:00 .) (See DTC P0203:00 .) (See DTC P0204:00 [L3 WITH TC] .)
1		No	Go to the next step.
2	Inspect the fuel injector for each cylinder. (See FUEL INJECTOR INSPECTION .) Is the fuel injector normal?	Yes	Go to the next step.
2		No	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION .)
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) Are all items normal?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION .)
3		No	Repair or replace the malfunctioning part according to the inspection results.