Fuel Injector Operation Inspection

FUEL INJECTOR OPERATION INSPECTION - IF SIMULATION FUNCTION OF M-MDS IS USED 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. Connect the M-MDS to the DLC-2. Select the INJ#1, INJ#2, INJ#3 and INJ#4 PIDs. (See ON-BOARD DIAGNOSTIC TEST .) Turn the fuel injector from on to off using the PIDs 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. Switch the ignition to ON. Measure the voltage between suspect fuel injector 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 terminal A and fuel pump relay 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 suspected wiring harness and connector.
3		No	Go to the next step.
4	Inspect the suspect fuel injector. (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 .)

FUEL INJECTOR OPERATION INSPECTION - IF SIMULATION FUNCTION OF M-MDS IS USED FUEL INJECTOR OPERATION INSPECTION - IF SIMULATION FUNCTION OF M-MDS IS 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 work properly.
1		No	Go to the next step.
2	Disconnect the fuel injector that the fuel injector operation sound does not heard at Step 1. Switch the ignition to ON. Measure the voltage between suspect fuel injector 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 terminal A and fuel pump relay 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 suspected wiring harness and connector.
3		No	Go to the next step.
4	Inspect the suspect fuel injector. (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 .)