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DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSAUDI2004A4 BASE, 4D SEDAN, 3.0 TREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEM3.0L - ENGINE CONTROLS - FUEL INJECTION & IGNITION, ENGINE CODE(S): AVK, BGN
2004 Audi A4 Base, 4D Sedan, 3.0 T
3.0L - Engine Controls - Fuel Injection & Ignition, Engine Code(S): AVK, BGN
2004 Audi A4 Base, 4D Sedan, 3.0 TSECTION 3.0L - Engine Controls - Fuel Injection & Ignition, Engine Code(S): AVK, BGN
- 01 On Board Diagnostic (OBD)
- On Board Diagnostic (OBD)
- Diagnostic Trouble Code (DTC) memory
- Output Diagnostic Test Mode (DTM)
- Basic setting
- Control module, coding
- Measured value block, reading
- Adaptation
- Login procedure or coding II
- Readiness code
- Readiness code
- Reading readiness code
- Readiness code, generating
- Notes
- Operation 1: Checking DTC memory
- Operation 2: Erase DTC memory
- Operation 3: Adapting the throttle valve control module to the engine control module
- Operation 4: Adapting kick down functionl
- Operation 5: Checking operating status of oxygen sensor control
- Operation 6: Diagnosis of oxygen sensor aging before catalytic converter
- Operation 7: Diagnosis of oxygen sensor operational readiness behind catalytic converter
- Operation 8: Diagnosis of tank ventilation valve
- Operation 9: Diagnosis of tank seal and oxygen sensor interchange recognition behind catalytic converter
- Operation 10: Diagnosis of oxygen sensor aging behind catalytic converter
- Operation 11: Catalytic converter diagnosis
- Operation 12: Diagnosis of secondary air injection system
- Operation 13: Reading readiness code
- 24 Multiport Fuel Injection (MFI)
- Motronic injection system, servicing
- Safety precautions
- Rules for cleanliness
- Technical data
- Component locations, overview
- Notes
- Location of Throttle Position (TP) sensor -G79- and Sender 2 for accelerator pedal position -G185-
- Location of Fuel Pump (FP) relay -J17-
- Location Brake light switch -F- and Brake pedal switch (cruise control/diesel direct fuel injection -F47-, Clutch vacuum vent valve switch -F36-
- Location, Engine Control Module in electronics box (plenum chamber)
- Locations in electronics box (plenum chamber).
- Identification of connector bracket - right side of vehicle
- Identification of connector bracket - left side of vehicle
- Location of Brake booster pressure sensor -G294-
- Location of Intake manifold change-over valve -N156-
- Air cleaner, disassembling and assembling
- Intake manifold change-over system components, removing and installing
- Wiring and component check with test box VAG 1598/31
- Procedure following interruption of voltage supply
- Procedure after voltage supply open circuit
- Engine Control Module (ECM) (without metal anti-theft housing), replacing
- Engine Control Module (ECM) (with metal anti-theft housing), replacing
- Idling speed, checking
- Fuel pressure regulator and holding pressure (vehicles up to 06.03), checking
- System pressure and holding pressure (vehicles as of 07.03), checking
- Fuel injectors, checking
- Fuel rail with injectors, disassembling and assembling
- Fuel injectors, removing and installing
- Injection quantity, leak tightness and spray pattern of injectors, testing
- Fuel Pump (FP) relay -J17- and activation, checking
- Mass Air Flow (MAF) sensor -G70-, checking
- Intake air system for leaks (unmetered air), checking
- Intake manifold change-over, checking
- Oxygen sensor control, checking
- Oxygen sensors and oxygen sensor control before catalytic converter, checking
- Oxygen sensors before catalytic converter, checking aging
- Oxygen sensors before catalytic converter, checking heating
- Oxygen sensors and oxygen sensor control behind catalytic converter, checking
- Oxygen sensors behind catalytic converter, checking aging
- Oxygen sensors behind catalytic converter, checking heating
- Oxygen sensors behind catalytic converter, recognizing interchanges
- Oxygen sensors before catalytic converter, removing and installing
- Oxygen sensors behind catalytic converter, removing and installing
- Fuel tank breather, checking
- Electronic Engine Power Control (EPC) (electronic throttle), checking
- Function of the electronic throttle system
- Malfunction lamp for electronic throttle in instrument cluster
- Electronic Power Control (EPC) warning lamp -K132-, checking
- Throttle valve control module -J338-, checking
- Throttle valve control module -J338-, adaptation
- Angle sensor for throttle valve actuator, checking
- Accelerator position sensor, checking
- Kickdown function, adapting
- Brake light switch and brake pedal switch, checking
- Clutch pedal switch check -F36-, checking
- Cruise Control System (CCS), testing
- Auxiliary signals, checking
- Vacuum Hose Diagram(S)
- Motronic injection system, servicing
- 28 Ignition/Glow plug system
- Ignition system, checking
- General notes on ignition system
- Safety precautions
- Technical data for ignition system
- Ignition coils with output stages, checking
- Motronic Engine Control Module (ECM) power supply relay -J271-, checking
- Engine speed (RPM) sensor -G28-, checking
- Intake Air Temperature (IAT) sensor -G42-, checking
- Engine Coolant Temperature (ECT) sensor -G62-, checking
- Engine Control Module (ECM) power supply, checking
- Knock control stop, checking
- Knock sensors, checking
- Camshaft Position (CMP) sensor, checking
- Misfire detection, checking
- Ignition system, checking
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.