Fuel Injector --, Checking
WARNING: This page does not describe the selected car, but rather 12 other vehicles, including the 2017 Audi S5, 2016 Audi S5, 2016 Audi S4, 2015 Audi S5, and 2015 Audi S4. However, it is still accessible from the selected car via links, so may be relevant.
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.
- Coolant Temperature: ≥ 80° C.
- Observe all safety precautions: SAFETY PRECAUTIONS
.
- View clean working conditions: CLEAN WORKING CONDITIONS
.
- For Hybrid vehicles refer to: HIGH VOLTAGE SYSTEM GENERAL WARNINGS
.
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: Harness connector from suspect Fuel Injector --.
- CHECK: Suspect Fuel Injector -- component connector terminals 1 to 2 for resistance (refer to the appropriate system wiring diagram for proper terminal locations).
- SPECIFIED VALUE: 0.5 - 15 Ω (@ approx. 20° C).
-- Was Value obtained? |
-- YES:
-- NO:
- REPLACE: Suspect Fuel Injector -- (s). Refer to appropriate repair information.
- GO TO: Step 4
|
| 3 |
- REMOVE: Engine Control Module - J623-. Refer to appropriate repair information.
- CHECK: Suspect Fuel Injector -- harness connector terminal 1 to the Engine Control Module - J623- (refer to the appropriate system wiring diagram for proper terminal locations).
- CHECK: Suspect Fuel Injector -- harness connector terminal 2 to the Engine Control Module - J623- (refer to the appropriate system 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 appropriate repair information.
- GO TO: Step 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
|
| 4 |
- Final Procedure
- Perform a road test to verify repair.
-- Does the original DTC return? |
-- YES:
- CHECK: Engine Control Module -J623- harness connector for any damaged, pushed-out pins.
- REPAIR: As necessary.
- Clear the DTC's. Refer to DIAGNOSTIC MODE 04 - ERASE DTC MEMORY
.
- Repair is complete. Generate Readiness Code. Refer to READINESS CODE
.
- Return vehicle to Customer.
- If all electrical connections are OK:
- REPLACE: Engine Control Module -J623-. Refer to appropriate repair information.
- Repair is complete. Generate Readiness Code. Refer to READINESS CODE
.
- Return vehicle to Customer.
-- NO:
- Perform the diagnostic procedure for any DTC's.
- If no DTC's return the repair is complete.
- Return vehicle to customer.
|