Manual sections Wiring diagrams
Repair manual

Electrical Equipment Audi A4 B7

Step-by-step instructions on "Electrical Equipment" for Audi A4 B7 (2004–2009). Pick an article — removal, installation, adjustment and diagnostics with illustrations.

General information

Warnings and safety measures for lead-acid batteries

Smoking, naked flames, fires and sparks

Electrolyte

Eye protection and protective clothing

Danger of explosion

Battery handling instructions

Battery in engine compartment, disconnecting and reconnecting

Disconnecting

Reconnecting

Battery in luggage compartment, disconnecting and connecting

Connecting

Battery in engine compartment, removing and installing

Battery in luggage compartment, removing and installing

Battery installation, checking

Batteries with central gas venting

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, removing and installing

Generator (GEN) - 4-cylinder 1.8L Turbo engine, removing and installing

Tightening Torques (1.8L)

Generator (GEN) - 4-cylinder 2.0L Turbo FSI engine, removing and installing

Tightening Torques (2.0L)

Generator (GEN) - 3.0L 6-cylinder engine, removing and installing

Removing

Installing

Generator (GEN) - 3.2L 6-cylinder FSI engine, removing and installing

Tightening Torques (3.2L)

Generator (GEN) - 4.2L 8-cylinder engine (Audi S4), removing and installing

Tightening Torques (4.2L - S4)

Generator (GEN) - 4.2L 8-cylinder FSI engine (Audi RS4), removing and installing

Tightening Torques (4.2L - RS4)

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

Instrument cluster, disposal

On Board Diagnostic (OBD), function

Message "dEF" in trip recorder display

Instrument cluster, removing and installing

Instrument cluster, rear view

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

Windshield wiper system, removing and installing

Windshield wiper blade park position, adjusting

Windshield wiper blade - through 10.04, replacing

Windshield wiper blade mount - through 10.04, removing and installing

Windshield wiper blade - from 11.04, replacing

Washer fluid reservoir - Audi A4 S4, removing and installing

Washer fluid reservoir - Audi RS4, removing and installing

Windshield washer spray jets, removing and installing

Windshield washer spray jets, adjusting

Rear window washer spray jet, removing and installing

Rear window washer spray jet, adjusting

Rear window wiper arm, removing and installing

Rear window wiper blade, replacing

Rear window wiper motor, removing and installing

Washer fluid reservoir, removing and installing

Headlamp washer spray jets, removing and installing

Headlamp washer spray jets, adjusting

On Board Diagnostic (OBD), functions

Halogen headlamps, assembly

Headlamps, adjusting

Headlamps, service preparation

Preparation - vehicles with 1.8L 4-cylinder Turbo engine

Preparation - vehicles with 3.0L 6-cylinder engine

Low Beam Headlamp M29 / M31 - bulb, replacing

High Beam Headlamp M30 / M32 - bulb, replacing

Turn signal/parking lamp bulb, replacing

Headlamp securing lugs, servicing

Headlamps, removing and installing

Parking Lamp M1 / M3 - bulb, replacing

Front Turn Signal Lamp M5 / M7 - bulb, replacing

Headlamps with High Intensity Gas Discharge (HID) Lamps, assembly

Preparation - 4.2L 8-cylinder engine

HID low beam headlamp bulb - through approx. 09.01, replacing

HID headlamp bulb, disposal

HID low beam headlamp bulb - from approx. 09.01, 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

Headlamps with High Intensity Gas Discharge (HID) "Bi-Xenon" Lamps, assembly

HID low beam headlamp bulb, replacing

High Beam Headlamp bulb M30 / M32, replacing

High/Low Beam Switch-Over Solenoid N347 / N348, 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

Upper washer fluid reservoir and power steering fluid reservoir, removing and installing

Preparation - vehicles with 2.0L 4-cylinder Turbo FSI 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

Daytime Running Lamp (DRL) bulb, replacing

High/Low Beam Switch-Over Solenoid N347 / N348 and Dynamic Cornering Light Motor V318 / V319, removing and installing

Fog lamp housing, removing and installing

Fog lamp bulb, replacing

Fog lamps, adjusting

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

Side mounted turn signals, removing and installing

Rear light/bulb carrier - Sedan, removing and installing

Rear light/bulb carrier - Avant, removing and installing

Rear light/bulb carrier in rear fender - Sedan, removing and installing

Rear light/bulb carrier in rear lid - Sedan, removing and installing

Taillamp/rear fog lamp bulb, replacing

Rear light/bulb carrier in rear fender - Avant, removing and installing

Rear light/bulb carrier in rear lid - Avant, removing and installing

Taillamp/rear fog lamp bulb, removing and installing

High-mount brake lamp - Sedan, removing and installing

High-mount brake lamp - Avant, removing and installing

License plate lamp, removing and installing

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

Turn Signal Switch E2 , removing and installing

Cruise Control Switch E45 , removing and installing

Windshield Wiper/Washer Switch E22 , removing and installing

Lock cylinder, removing and installing

Ignition/starter switch, removing and installing

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

Headlamp Range Control Module J431 , removing and installing

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

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

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

Function

Malfunctioning transponder and/or lost keys

Reader coil, replacing

Lock set or instrument cluster, replacing.

Alarm Horn H12 , removing and installing

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 , removi

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

Signal Horn/Dual Tone Horn H1 - through 10.04, removing and installing

Signal Horn/Dual Tone Horn H1 - from 11.04, removing and installing

Heated steering wheel, servicing

Garage Door Opener Control Head E284 , removing and installing

Garage Door Opener Control Module J530 - through 10.04, removing and installing

Garage Door Opener Control Module J530 - from 11.04, removing and installing

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

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

Repairing a wire with cross-section 0.22 mm 2 or 0.35 mm 2

Antenna cables, replacing

Antenna connector cable, replacing