Fuel Injector Operation Inspection

If simulation function of M-MDS is used:

STEP	INSPECTION	RESULTS	ACTION
1	Start the engine and warm it up until normal operating temperature. 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	Go to the next step.
2	Disconnect the fuel injector that the engine speed does not drop at Step 1. Turn the ignition switch to ON position. Measure the voltage between suspect fuel injector connector terminal A (wiring harness-side) and body ground. Is the voltage B+ ?	Yes	Go to the next step.
2		No	Repair or replace for open or short circuit between fuel injector connector terminal A and main relay connector terminal C.
3	Inspect for open or short circuit between suspect fuel injector terminal B and following PCM terminals: Fuel injector No. 1 PCM terminal 2BB Fuel injector No. 2 PCM terminal 2BC Fuel injector No. 3 PCM terminal 2BD Fuel injector No. 4 PCM terminal 2AZ Is there any malfunction?	Yes	Repair or replace for open or short circuit.
3		No	Go to the next step.
4	Inspect the fuel injector for suspected cylinder. (See FUEL INJECTOR INSPECTION ). Is the fuel injector normal?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION ).
4		No	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION ).

If simulation function of M-MDS is not used:

STEP	INSPECTION	RESULTS	ACTION
1	While cranking the engine, inspect for fuel injector operation sound at each cylinder using a soundscope. Is the operation sound heard?	Yes	Fuel injector operation is normal.
1		No	Go to the next step.
2	Disconnect the fuel injector that the fuel injector operation sound does not heard at Step. Turn the ignition switch to ON position. Measure the voltage between suspect fuel injector connector terminal A (wiring harness-side) and body ground. Is the voltage B+ ?	Yes	Go to the next step.
2		No	Repair or replace for open or short circuit between fuel injector connector terminal A and main relay connector terminal C.
3	Inspect for open or short circuit between suspect fuel injector terminal B and following PCM terminals: Fuel injector No. 1 PCM terminal 2BB Fuel injector No. 2 PCM terminal 2BC Fuel injector No. 3 PCM terminal 2BD Fuel injector No. 4 PCM terminal 2AZ Is there any malfunction?	Yes	Repair or replace for open or short circuit.
3		No	Go to the next step.
4	Inspect the fuel injector for suspected cylinder. (See FUEL INJECTOR INSPECTION ). Is the fuel injector normal?	Yes	Replace the PCM. (See PCM REMOVAL/INSTALLATION ).
4		No	Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION ).