Test Procedure

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

Start diagnosis

-- Remove the engine cover with air filter. Refer to the Repair Information.

-- Disconnect the Fuel Injector -- electrical harness connectors from Fuel Injectors -N30, N31, N32, N33, N83-.

Checking internal resistance

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

Specified value: 10.0 to 18.5 Ω (at approx. 20 °C)

If the specified value was Not obtained:

-- Replace the Fuel Injector -- Refer to the Repair Information.

If the specified value was obtained:

Checking activation and wiring

-- Connect a Diode test lamp (12 V) to the electrical harness connector terminals 1 and 2 of the Fuel Injector -- to be tested.

-- Operate the starter and test the activation of the Fuel Injector --.

LED should flicker.

-- Switch the ignition OFF.

If LED does not flicker:

-- Remove the Fuel Pump Relay -J17-.

-- Connect a jumper between the Fuel pump relay terminals 30 and 87

-- Turn the ignition switch ON.

-- Using a test lamp connected to ground, check terminal 1 of the Fuel Injector -- to be tested. The lamp should be ON.

-- If the test lamp did not turn on, locate the open or high resistance in the voltage supply circuit.

If the voltage supply was OK:

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

-- Using a multimeter, check the Fuel Injector -- electrical harness connector terminals to the Engine Control Module (ECM) -J623- electrical harness connector T60 terminals for an open circuit. Refer to Wiring Diagrams for pin locations.

Component	Fuel Injector -- electrical harness connector terminals:	Engine Control Module (ECM) -J623- electrical connector T60 terminals:
Cylinder 1 Fuel Injector -N30-	2	2
			-
Cylinder 2 Fuel Injector -N31-	2	3
			-
Cylinder 3 Fuel Injector -N32-	2	31
			-
Cylinder 4 Fuel Injector -N33-	2	4
			-
Cylinder 5 Fuel Injector -N83-	2	5
			-

Specified value: 1.5 Ω Max.

If the specified value was Not obtained:

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

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

-- If necessary, repair the faulty wiring.

If no malfunction is detected in the wiring and the voltage supply was OK:

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

-- Install the engine cover with air filter. Refer to the Repair Information.