Fuel Pressure Sensor -G247-, Checking

WARNING: This page is about a different car, the 2014 Audi A8 Quattro, 2013 Audi A8, and 2012 Audi A8. However, it is still accessible from the selected car via links, so may be relevant.

Function

The Fuel Pressure Sensor -G247- Measures The Fuel Pressure In The High-Pressure Fuel System. The Engine Control Module -J623- Analyzes The Signal And Regulates The Fuel High Pressure Through The Fuel Metering Valve -N290- In The High-Pressure Pump.

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

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 in FUEL PRESSURE SENSOR -G247-, CHECKING No: Gather More Information From Customer About The Complaint
2	Ignition: On Disconnect: Fuel Pressure Sensor -G247- Electrical Connector Check: Fuel Pressure Sensor -G247- Wiring Connector Terminals 1 To 3 For Voltage Specified Value: About 5.0 V Ignition: Off -- Was Value Obtained?	Yes: Go To Step 3 fuel Pressure Sensor -G247-, Checking => 3 No: Go To Step 4 fuel Pressure Sensor -G247-, Checking => 4
3	Remove: Engine Control Module - J623-. Refer To Appropriate service information. Check: Fuel Pressure Sensor -G247- Electrical Connector Terminals 2 To The Engine Control Module - J623- Electrical Connector Terminals T60 / 25. Specified Value: 0.5 Ω (± 0.3 Ω) -- Was Value Obtained?	Yes: Replace: Fuel Pressure Sensor -G247-. Refer To Appropriate Repair Information. Go To: Step 5 fuel Pressure Sensor -G247-, Checking => 5 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 5 fuel Pressure Sensor -G247-, Checking => 5
4	Remove: Engine Control Module - J623-. Refer To Appropriate service information. Check: Fuel Pressure Sensor -G247- Electrical Connector Terminals 1 To The Engine Control Module - J623- Electrical Connector Terminals T60 / 14. Check: Fuel Pressure Sensor -G247- Electrical Connector Terminals 3 To The Engine Control Module - J623- Electrical Connector Terminals T60 / 26. 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 5 in FUEL PRESSURE SENSOR -G247-, CHECKING 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 5 in FUEL PRESSURE SENSOR -G247-, CHECKING
5	Final Procedure Perform A Road Test To Verify Repair. Do Any DTCS Return:	Yes: Check The DTC Memory. Refer To DIAGNOSTIC MODE 03 - READ DTC MEMORY . Perform The Diagnostic Procedure For That DTC. No: Repair Is Complete, Generate Readiness Code. Refer To READINESS CODE . Return Vehicle To Customer