Test Procedure

-- Perform a preliminary check to verify the customers complaint. Refer to PRELIMINARY CHECK 

Start diagnosis

-- Remove the engine cover.

-- Disconnect the Fuel Injectors -- electrical harness connectors from Fuel Injectors -N30, N31, N32, N33-.

-4-

Checking internal resistance

-- Using a multimeter, Check the Fuel Injector -- terminals 1 to 2 for resistance.

50 K Ω - 700 K Ω (Depending on Temperature)

If the specified value was Not obtained:

-- Replace the malfunctioning Fuel Injector --.

If the specified value was obtained:

-- Remove the Engine Control Module (ECM) -J623-. Refer to the Repair Information.

-- Using a multimeter, Check the Fuel Injectors -- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for a short to ground or voltage, high resistance or an open circuit.

Component	Fuel Injector -- electrical harness connector terminals	Engine Control Module (ECM) -J623- electrical connector T60 terminals
Cylinder 1 Fuel Injector -N30-	1	46
	2	31
Cylinder 2 Fuel Injector -N31-	1	2
	2	17
Cylinder 3 Fuel Injector -N32-	1	1
	2	16
Cylinder 4 Fuel Injector -N33-	1	47
	2	32

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

-- Check the wiring for an open, high resistance or short to ground or voltage.

-- Check the electrical harness connector for damage, corrosion, loose or broken terminals.

-- If necessary, repair the faulty wiring connection.

If the specified value was obtained:

-- Replace the Engine Control Module (ECM) -J623-. Refer to the Repair Information.

-- Install the engine cover with air filter.