Safety Warning
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 MANUALSAUDI2009A6 BASEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 42 (ELECTRICAL EQUIPMENT)
2009 Audi A6 Base
Section 42 (Electrical Equipment)
2009 Audi A6 BaseSECTION Section 42 (Electrical Equipment)
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- 27 Battery, Starter, Generator, Cruise Control
- Battery
- General information
- Warnings and safety measures for lead-acid batteries
- Battery handling instructions
- Battery in engine compartment, disconnecting and reconnecting
- Battery in luggage compartment, disconnecting and connecting
- Battery in engine compartment, removing and installing
- Battery in luggage compartment, removing and installing
- Battery installation, checking
- Batteries with central gas venting
- Battery with charge indicator (magic eye), checking
- Visual inspection
- No-load voltage, checking
- Electrolyte level - batteries with charge indicator (magic eye), checking
- Electrolyte level - batteries with sealing plugs, checking
- Electrolyte specific gravity - batteries with sealing plugs, checking
- Battery, testing
- Battery, charging
- Quick-charging
- Battery Interrupt Igniter N253 - Audi RS4
- Generator (GEN)
- Generator (GEN) - 4-cylinder 1.8L Turbo engine, removing and installing
- Generator (GEN) - 4-cylinder 2.0L Turbo FSI engine, removing and installing
- Generator (GEN) - 3.0L 6-cylinder engine, removing and installing
- Generator (GEN) - 3.2L 6-cylinder FSI engine, removing and installing
- Generator (GEN) - 4.2L 8-cylinder engine (Audi S4), removing and installing
- Generator (GEN) - 4.2L 8-cylinder FSI engine (Audi RS4), removing and installing
- Starter
- Starter - 1.8L 4-cylinder Turbo engine, removing and installing
- Starter - 2.0L 4-cyl Turbo FSI engine, removing and installing
- Starter - 3.0L 6-cylinder engine, removing and installing
- Starter - 3.2L 6-cylinder FSI engine, removing and installing
- Starter - 4.2L 8-cylinder engine (Audi S4), removing and installing
- Starter - 4.2L 8-cylinder FSI engine (Audi RS4), removing and installing
- Battery
- 90 Instruments
- Instrument Cluster
- General information
- Instrument cluster, disposal
- On Board Diagnostic (OBD), function
- Message "dEF" in trip recorder display
- Instrument cluster, removing and installing
- Instrument cluster, rear view
- Instrument cluster multi-pin connector assignments
- Fuel Level Sensor G - front-wheel drive, multi-pin connector assignments
- Fuel Level Sensor G , Fuel Level Sensor 2 G169 - quattro, multi-pin connector assignments
- Engine Coolant Temperature (ECT) Gauge Sensor G2 - 1.8L 4-cylinder Turbo engine, multi-pin connector assignments
- Engine Coolant Temperature (ECT) Sensor G62 - 2.0L 4-cylinder Turbo FSI engine, multi-pin connector assignments
- Engine Coolant Temperature (ECT) Gauge Sensor G2 - 3.0L 6-cylinder engine, multi-pin connector assignments
- Engine Coolant Temperature (ECT) Sensor G62 - 3.2L 6-cylinder FSI engine, multi-pin connector assignments
- Engine Coolant Temperature (ECT) Sensor G62 - 4.2L 8-cylinder engine (Audi S4), multi-pin connector assignments
- Engine Coolant Temperature (ECT) Sensor G62 - 4.2L 8-cylinder engine (Audi RS4), multi-pin connector assignments
- Radio Frequency Controlled Clock Receiver J489 , removing and installing
- Instrument Cluster
- 92 Windshield Wiper Washer System
- Windshield Wiper System
- Windshield wiper system, removing and installing
- Windshield wiper blade park position, adjusting
- Windshield wiper blade - through 10.04, replacing
- Windshield wiper arm - through 10.04, assembly
- Windshield wiper blade mount - through 10.04, removing and installing
- Windshield wiper blade - from 11.04, replacing
- Windshield Washer System
- Rear Window Wiper Washer System
- Rear window wiper/washer, assembly
- Rear window washer spray jet, removing and installing
- Rear window washer spray jet, adjusting
- Rear window wiper arm, removing and installing
- Rear window wiper arm park position, adjusting
- Rear window wiper blade, replacing
- Rear window wiper motor, assembly
- Rear window wiper motor, removing and installing
- Washer fluid reservoir, removing and installing
- Headlamp Washer System - through 10.04
- Headlamp Washer System - from 11.04
- Windshield Wiper System
- 94 Lights, Switches - Exterior
- Halogen Headlamps - through 10.04
- General information
- On Board Diagnostic (OBD), functions
- Halogen headlamps, assembly
- Headlamps, removing and installing
- Headlamps, adjusting
- Headlamps, service preparation
- Low Beam Headlamp M29 / M31 - bulb, replacing
- High Beam Headlamp M30 / M32 - bulb, replacing
- Turn signal/parking lamp bulb, replacing
- Headlamp securing lugs, servicing
- Halogen Headlamps - from 11.04
- General information
- On Board Diagnostic (OBD), functions
- Halogen headlamps, assembly
- Headlamps, removing and installing
- Headlamps, adjusting
- Low Beam Headlamp M29 / M31 - bulb, replacing
- High Beam Headlamp M30 / M32 - bulb, replacing
- Parking Lamp M1 / M3 - bulb, replacing
- Front Turn Signal Lamp M5 / M7 - bulb, replacing
- Headlamp securing lugs, servicing
- Headlamps with High Intensity Gas Discharge (HID) Lamps - through 10.04
- General information
- On Board Diagnostic (OBD), functions
- Headlamps with High Intensity Gas Discharge (HID) Lamps, assembly
- Headlamps, removing and installing
- Headlamps, adjusting
- Headlamps, service preparation
- HID low beam headlamp bulb - through approx. 09.01, replacing
- HID headlamp bulb, disposal
- HID low beam headlamp bulb - from approx. 09.01, replacing
- High Beam Headlamp M30 / M32 - bulb, replacing
- Turn signal/parking lamp bulb, replacing
- Headlamp Beam Adjustment Motor V48 / V49, removing and installing
- High Intensity Gas Discharge (HID) Lamp Control Module J343 / J344 - through approx. 09.01, removing and installing
- High Intensity Gas Discharge (HID) Lamp Control Module J343 / J344 - from approx. 09.01, removing and installing
- Headlamp securing lugs, servicing
- Headlamps with High Intensity Gas Discharge HID Lamps - through 10.04
- General information
- On Board Diagnostic (OBD), functions
- Headlamps with High Intensity Gas Discharge (HID) "Bi-Xenon" Lamps, assembly
- Headlamps, removing and installing
- Headlamps, adjusting
- HID low beam headlamp bulb, replacing
- HID headlamp bulb, disposal
- High Beam Headlamp bulb M30 / M32, replacing
- High/Low Beam Switch-Over Solenoid N347 / N348, removing and installing
- Turn signal/parking lamp bulb, replacing
- Headlamp Beam Adjustment Motor V48 / V49, removing and installing
- High Intensity Gas Discharge (HID) Lamp Control Module J343 / J344, removing and installing
- Adapter cable for HID headlamp bulb control module, removing and installing
- Headlamp securing lugs, servicing
- Headlamps with High Intensity Gas Discharge HID Bi-Xenon Lamps - through 10.04
- General information
- On Board Diagnostic (OBD), functions
- Headlamps with High Intensity Gas Discharge (HID) "Bi-Xenon" Lamps, assembly
- Headlamps, removing and installing
- Headlamps, adjusting
- Headlamps, service preparation
- Notes
- Upper washer fluid reservoir and power steering fluid reservoir, removing and installing
- Preparation - vehicles with 1.8L 4-cylinder Turbo engine
- Preparation - vehicles with 2.0L 4-cylinder Turbo FSI engine
- Preparation - vehicles with 3.0L 6-cylinder engine
- Preparation - vehicles with 3.2L 6-cylinder FSI engine
- Preparation - vehicles with 4.2L 8-cylinder engine (Audi S4)
- Preparation - vehicles with 4.2L 8-cylinder FSI engine (Audi RS4)
- HID headlamp bulb, replacing
- HID headlamp bulb, disposal
- Daytime Running Lamp (DRL) bulb, replacing
- Parking Lamp M1 / M3 - bulb, replacing
- High/Low Beam Switch-Over Solenoid N347 / N348 and Dynamic Cornering Light Motor V318 / V319, removing and installing
- Front Turn Signal Lamp M5 / M7 - bulb, replacing
- High Intensity Gas Discharge (HID) Lamp Control Module J343 / J344, removing and installing
- Headlamp securing lugs, servicing
- Fog Lamps - through 10.04
- Fog Lamps - from 11.04
- Fog lamp housing - Audi A4, removing and installing
- Fog lamp housing - Audi A4 with "S-line" equipment Audi S4, removing and installing
- Fog lamp housing - Audi RS4, removing and installing
- Fog lamp bulb - Audi A4, replacing
- Fog lamp bulb - Audi A4 with "S-line" equipment Audi S4, replacing
- Fog lamp bulb - Audi RS4, replacing
- Fog lamps, adjusting
- Side Mounted Turn Signals
- Rear Lights - through 10.04
- Rear Lights - from 11.04
- Rear lights in rear fender - Sedan, assembly
- Rear light/bulb carrier in rear fender - Sedan, removing and installing
- Rear lights in rear lid - Sedan, assembly
- Rear light/bulb carrier in rear lid - Sedan, removing and installing
- Taillamp/rear fog lamp bulb, replacing
- Rear lights in rear fender - Avant, assembly
- Rear light/bulb carrier in rear fender - Avant, removing and installing
- Rear lights in rear lid - Avant, assembly
- Rear light/bulb carrier in rear lid - Avant, removing and installing
- Taillamp/rear fog lamp bulb, removing and installing
- High-Mount Brake Lamp - through 10.04
- High-Mount Brake Lamp - from 11.04
- License Plate Lamp
- Steering Column Switch Module
- General information
- On Board Diagnostic (OBD), function
- Steering column switch module, assembly
- Steering column switch module, removing and installing
- Spiral spring, removing and installing
- Steering Angle Sensor G85 , removing and installing
- Steering Column Electronics Systems Control Module J527 , removing and installing
- Steering Column Electronics Systems Control Module J527 , front multi-pin connector assignments
- Steering Column Electronics Systems Control Module J527 , rear multi-pin connector assignments
- Turn Signal Switch E2 , removing and installing
- Cruise Control Switch E45 , removing and installing
- Windshield Wiper/Washer Switch E22 , removing and installing
- Ignition/Starter Switch and Lock Cylinder
- Parking Aid System
- General information
- On Board Diagnostic (OBD), functions
- Parking aid system, component overview
- Parking Aid Control Module J446 , removing and installing
- Rear Parking Aid Warning Buzzer H15 - Sedan, removing and installing
- Rear Parking Aid Warning Buzzer H15 - Avant, removing and installing
- Rear parking aid sensors, removing and installing
- Automatic Headlamp Range Control
- Halogen Headlamps - through 10.04
- 96 Lights, Switches - Interior, Anti-theft
- Switches - Interior
- Light Switch E1 , removing and installing
- Ambient Illumination Deactivation Switch E491 , removing and installing
- Daytime running lamps (DRL) switch, removing and installing
- Emergency Flasher Button E229 , removing and installing
- Switches in center console, removing and installing
- Front heated seat regulating switches, removing and installing
- Rear heated seat regulating switches, removing and installing
- Start System Button E378 - Audi RS4, removing and installing
- Glove Compartment Lamp Switch E26 , removing and installing
- Mirror selector/adjustment switch, removing and installing
- Drivers power window switch panel - 2 switches, removing and installing
- Drivers power window switch panel - four switches, removing and installing
- Front passengers power window switch panel, removing and installing
- Rear door power window switches, removing and installing
- Sunroof Switch E8 , removing and installing
- Door contact switches, removing and installing
- Drivers Interior Locking Switch E150 , removing and installing
- Rear/Center Central Locking Switch E286 , removing and installing
- Remote Fuel Tank Flap Switch E204 and Rear Lid Remote Control Lock Switch E233 , removing and installing
- Drivers Seat Memory Program Control E97 , removing and installing
- Trunk Lock/Alarm/Central Locking Switch F124 - Sedan through 10.04, removing and installing
- Trunk Lock/Alarm/Central Locking Switch F124 - Avant through 10.04, removing and installing
- Trunk Lock/Alarm/Central Locking Switch F124 - from 11.04, removing and installing
- 12 V Socket U5 - in luggage compartment through 10.04, removing and installing
- 12 V Socket U5 - in luggage compartment from 11.04, removing and installing
- Anti-Theft Immobilizer
- Alarm Horn H12
- Lights - Interior
- Make-up Mirror Illumination L31 , removing and installing
- Front interior lamp module, removing and installing
- Ambient lighting LEDs, removing and installing
- Front Interior Light W1 - bulbs, replacing
- Front Passengers Map/Reading Light W13 , Drivers Map/Reading Light W19 - bulbs, replacing
- Front Passengers Airbag Disabled Indicator Lamp K145 - from 11.04, removing and installing
- Rear interior lamp module, removing and installing
- Left Rear Reading Light W11 , Right Rear Reading Light W12 - bulbs, replacing
- Glove Compartment Light W6 , removing and installing
- Front ashtray light, removing and installing
- Rear ashtray light, removing and installing
- Drivers Door Opener Illumination L108 , Front Passengers Door Opener Illumination L109 , Left Rear Door Opener Illumination L110 , Right Rear Door Opener Illumination L111 , removing and installing
- Door entry warning lights, removing and installing
- Left Footwell Light W9 , Right Footwell Light W10 , removing and installing
- Left Rear Footwell Light W45 , Right Rear Footwell Light W46 , removing and installing
- Left Luggage Compartment Light W18 , Right Luggage Compartment Light W35 - Sedan, removing and installing
- Luggage Compartment Light W3 - Avant, removing and installing
- Luggage Compartment Light W3 - bulb, Avant, replacing
- Rear Lid Courtesy Lamp W51 - Avant, removing and installing
- Horn
- Heated Steering Wheel
- Garage Door Opener - HomeLink (R)
- Switches - Interior
- 97 Wiring
- Relay and fuse panels
- General information
- Fuse panel, removing and installing
- Vehicle Electrical System Control Module J519 , removing and installing
- 9-position relay carrier, removing and installing
- 3-position relay carrier, removing and installing
- 4-position relay carrier, removing and installing
- Left connector station, removing and installing
- Comfort System Central Control Module J393 , removing and installing
- Right connector station, removing and installing
- Main fuse panel in left rear luggage compartment - Audi RS4, removing and installing
- Electronics box in plenum chamber, removing and installing
- Electronics box fan in plenum chamber, removing and installing
- 4-way relay carrier in electronics box in plenum chamber, removing and installing
- Connector junction, electronics box in plenum chamber, removing and installing
- Main fuse panel - vehicles with battery in engine compartment, removing and installing
- Positive terminal in plenum chamber - Audi RS4, removing and installing
- Wiring Harness and Connectors, servicing
- General information
- Safety precautions for repairing wiring harnesses and connectors
- Notes on repairs on wiring harnesses and connectors
- Notes on repairs to airbag and safety belt tensioner wiring harness
- Notes for repairs on CAN-Bus wires
- Repairing a wire with cross-section 0.22 mm 2 or 0.35 mm 2
- Antenna cables, replacing
- Antenna connector cable, replacing
- Relay and fuse panels
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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.