Fuel Injectors --, Checking

INCLUDES:

Cylinder 1 Fuel Injector -N30-

Cylinder 2 Fuel Injector -N31-

Cylinder 3 Fuel Injector -N32-

Cylinder 4 Fuel Injector -N33-

Cylinder 5 Fuel Injector -N83-

Cylinder 6 Fuel Injector -N84-

General Description

The Fuel Injectors -- are controlled by the Engine Control Module -J623- and are mounted normally in the cylinder head. The fuel injectors spray high-pressure atomized fuel directly into the combustion chamber.

Special Tools And Workshop Equipment Required

Multimeter.
Wiring Diagram.
Scan Tool.
LED Test Lamp.

Test Requirements

Fuses OK.
Battery voltage OK.
Switch OFF all electrical and electronic accessories.
Vehicles with Auto. Transmission, ensure Selector Lever position is in "P".
Vehicles with Man. Transmission, ensure Shifter Lever position is in "N" with Parking Brake applied.
Observe all safety precautions: SAFETY PRECAUTIONS .
View clean working conditions: CLEAN WORKING CONDITIONS .

Test Procedure

Step	Procedure	Result / Action to Take
1	PERFORM: Preliminary Check to verify the customers complaint. Refer to PRELIMINARY CHECK . -- Was Complaint verified?	-- YES: GO TO: Step 2 Fuel Injectors --, CHECKING - 2 . -- NO: GATHER more information from customer about the complaint.
2	IGNITION: OFF. DISCONNECT: Harness connector from suspect Fuel Injector --. CHECK: Suspect Fuel Injector -- component connector terminals 1 to 2 for resistance (refer to the wiring diagram for proper terminal locations). SPECIFIED VALUE: 0.5 - 15 Ω (@ approx. 20° C). -- Was Value obtained?	-- YES: GO TO: Step 3 Fuel Injectors --, CHECKING - 3 . -- NO: REPLACE: Suspect Fuel Injector -- (s). Refer to the appropriate service information. GO TO: Step 4 Fuel Injectors --, CHECKING - 4 .
3	REMOVE: Engine Control Module - J623-. Refer to the appropriate service information. CHECK: Suspect Fuel Injector -- harness connector terminal 1 to the Engine Control Module - J623- (refer to the wiring diagram for proper terminal locations). CHECK: Suspect Fuel Injector -- harness connector terminal 2 to the Engine Control Module - J623- (refer to the wiring diagram for proper terminal locations). SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω). -- Were Values obtained?	-- YES: REPLACE: Suspect Fuel Injector -- for a mechanical condition. Refer to the appropriate service information. GO TO: Step 4 Fuel Injectors --, CHECKING - 4 . -- NO: PERFORM: Visual Inspection of wiring and component. CHECK: Wiring for open, high resistance, short or harness connector for damage, corrosion, loose or broken terminals. REPAIR: Faulty wiring or connector. GO TO: Step 4 Fuel Injectors --, CHECKING - 4 .
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