Fuel Injectors, Checking
Function
The Cylinder Fuel Injectors -- are controlled by the Engine Control Module -J623- and mounted normal in the cylinder head. The fuel injectors spray high-pressure atomized fuel directly into the combustion chamber.
Special tools and workshop equipment required
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:
-- NO:
- Gather more Information from customer about the complaint
|
| 2 |
- IGNITION: OFF
- DISCONNECT: Faulty Fuel Injector -- harness connector.
- CHECK: The faulty Fuel Injector -- terminals for resistance. (* Refer to the wiring diagram for proper terminal locations *).
- SPECIFIED VALUE: 5 - 8 Ω (@ approx. 20° C)
-- Was value obtained? |
-- YES:
-- NO:
- CHECK: wiring for opens, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals
- REPAIR: faulty wiring or connector
- GO TO: Step 4
|
| 3 |
- REMOVE: Engine Control Module - J623-. Refer to appropriate service information.
- CHECK: Faulty Fuel Injector -- harness connector terminals to the Engine Control Module - J623- harness connector terminals. (* Refer to the wiring diagram for proper terminal locations *).
- SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω)
-- Was value obtained? |
-- YES:
- REPLACE: Engine Control Module -J623- Refer to appropriate repair information
- GO TO: Step 4
-- NO:
- CHECK: wiring for open, high resistance, short or electrical connector for damage, corrosion, loose or broken terminals
- REPAIR: faulty wiring or connector
- GO TO: Step 4
|
| 4 |
- Final Procedure
- Perform a road test to verify repair.
- Do any DTC's return:
|
-- YES:
-- NO:
- Repair is complete, Generate readiness code. Refer to READINESS CODE
.
- Return vehicle to Customer
|