Charge Air Pressure Sensor - G31-, CHECKING
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2016 Audi A4 Quattro, 2016 Audi A4, 2015 Audi A4 Quattro, 2014 Audi A4 Quattro, and 2013 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
General Description
The Charge Air Pressure Sensor -G31- is located in the inlet to the intake manifold. The Engine Control Module -J623- uses the sensor signal to regulate the turbo boost. There is no substitute function in the event of signal failure. Charge air pressure regulation is shut off, leading to a significant reduction in engine output.
Special tools and workshop equipment required
- Multimeter
- Wiring Diagram
- Scan Tool
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 |
- DISCONNECT: Charge Air Pressure Sensor -G31- harness connector.
- IGNITION: ON.
- CHECK: Charge Air Pressure Sensor -G31- harness connector terminals 1 to 3 for voltage.
- SPECIFIED VALUE: About 5.0 V.
- IGNITION: OFF.
-- Was Value obtained? |
-- YES:
-- NO:
|
| 3 |
- REMOVE: Engine Control Module - J623-. Refer to appropriate repair information.
- CHECK: Charge Air Pressure Sensor -G31- harness connector terminal 4 to the Engine Control Module - J623- harness connector T60 / 23 for resistance.
- SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Was Value obtained? |
-- YES:
- REPLACE: Charge Air Pressure Sensor -G31-. Refer to appropriate repair information.
- GO TO: Step 5
-- 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 5
|
| 4 |
- REMOVE: Engine Control Module - J623-. Refer to appropriate repair information.
- CHECK: Charge Air Pressure Sensor -G31- harness connector terminal 1 to the Engine Control Module - J623- harness connector T60 / 13 for resistance.
- CHECK: Charge Air Pressure Sensor -G31- harness connector terminal 3 to the Engine Control Module - J623- harness connector T60 / 27 for resistance.
- SPECIFIED VALUE: 0.5 Ω (± 0.3 Ω).
-- Were Values obtained? |
-- YES:
-- 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 5
|
| 5 |
- 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.
- If all electrical connections are OK:
- REPLACE: Engine Control Module -J623-. Refer to appropriate repair information.
- 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.
-- NO:
- Perform the diagnostic procedure for any DTC's.
- If no DTC's return the repair is complete.
- Return vehicle to customer.
|