Audi A8 / S8 (D4 / 4H, 2010 - 2018) fuses and relays

The A8 is a luxury car manufactured by Audi AG in Neckarsulm, Germany, the successor to the V8. In this material, we will analyze in detail the fuse and relay circuits of the Audi A8 / S8 (body index 4H) of the 3rd generation 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018 model year with 2.0 TFSI Hybrid engines, 3.0 TDI, 3.0 TFSI, 4.0 FSI, 4.2 FSI, 4.2 TDI, 6.3 W12.

General view of the car.
Here you will find the locations and photos of the mounting blocks. Separately, we note the fuses responsible for the cigarette lighter and fuel pump.

In the luggage compartment

Installation location of the fuse box in the luggage compartment of the car
The block is behind a plastic cover.


Access example.

Diagram of the fuse box in the trunk of the Audi A8
No. Description A
1 TCS/ESP button 5
Headlight range control unit
Power control unit
Diagnostic socket (16)
2 Data bus diagnostic interface 5
3 Adaptive Suspension Control Unit 5
4 Parking assistance control unit 5
5 Control unit, steering column electronics 5
6 Control block 5
7 Airbag control unit 5
Passenger side airbag deactivation indicator
"Seat occupied" recognition control unit
8 Garage door control unit 5
Night vision control unit
Air quality improvement control unit
Heated nozzles
4WD control unit
9 Electromechanical parking brake control module 5
10 Trailer detection control unit 5
Fridge
Seat heating control unit
Automatic anti-glare rear view mirror
11 Active steering control unit 5
12 Box Lever Control Unit 5
13 Lane change assist control unit 5
14 The engine control unit 5
15 starter relay 40
16 Headlight range control unit 5/10
Left headlight power control unit
17 Seat belt pretensioner control unit 25
18 Seat belt pretensioner control unit 25
19 The engine control unit 5
20 Voltage regulators 7.5
21 Camera control unit 7.5
22 Right headlight power control unit 10
23 ABS control unit 5
Air conditioning compressor
24 Engine crankcase heater 7.5
Emergency stop relay
Voltage regulator(s)
Engine mount control unit
Sound control unit transmitted through the vehicle body structure
25 Adaptive cruise control 10
battery
26 Automatic transmission control unit 5
Automatic transmission control unit
Local area network (CAN) controller
27 Air quality sensor 5
Refrigerant pressure and temperature sensor
Humidity sender
28 Special equipment 5
29 Electric parking brake 5
30 Reserve 5
31 Door control unit, rear right 7.5
32 Fuel tank leakage control unit 5
Fuel tank pressure sensor
telephone
33 Climatronic control unit 15
34 Air conditioning control unit 10
35 Data bus diagnostic interface 5
36 Fridge 15
37 Interface for special functions 5
38 Phone adapter, Bluetooth handset 5
39 Engine mount control unit 15
40 Gear lever control unit 10
41 Comfort control unit 10
42 20
43 Fuel pump control unit 25
44 Parking brake control unit 30
45 empty  
46 12V socket 20
47 Rear cigarette lighter 20
Additional sockets 12V
48 Front cigarette lighter fuse 20
DC-AC converter with socket, 12 V - 230 V
49 Adaptive Suspension Control Unit 15
fifty DC-AC converter with socket, 12 V - 230 V 15
51 Parking brake control unit 30
52 Seat heating control unit 25
Air conditioning control unit
Heated rear seat switch
53 Comfort control unit 20
54 Air conditioning fan control unit 20
55 Comfort control unit 20
56 Reserve 30
57 Rear seat adjustment 5
Seat remote control
58 Cooling Fan Relay 35
59 Seat adjustment 7.5
60 Trailer detection control unit 25/30
trailer connector connector
61 Trailer detection control unit 20/25
trailer connector connector
62 Seat adjustment 30
63 Seat adjustment 30
64 Trailer detection control unit 20/25
trailer connector connector
65 Trailer detection control unit 15
trailer connector connector
66 Seat adjustment 7.5
67 Accumulator battery  15
68 empty -
69 Audio control unit 30
Voltage regulators
radio tape recorder
70 Audio control unit 30
71 multimedia control unit 10
Voltage regulators
Information display control unit
Information display
72 Tire pressure monitoring unit 5
73 Rear view camera control unit 5
Automatic anti-glare rear view mirror
74 DVD 5
75 TV tuner 5
76 Information display control unit 7.5
77 Control Panel 5
Analog clock
78 Vehicle information control unit 5
79 radio tape recorder 7.5
80 Telephone 5
Chip card reader
Rear view camera control unit
81 empty -
82 Reserve 80
83 Reserve 110
84 Rear window heating 40
85 Leveling system 40
86 Engine start/stop switch 40
87 Front passenger seat adjustment 15
R1 Adaptive Suspension Compressor Relay
R2 Rear window heating
R3 Automatic anti-glare rear view mirror
Cooling Fan Relay
R4 Fuel pump relay
R5 Engine starter relay
R6 Terminal 15 relay supply voltage
R7 Relay Power Socket


An additional fuse board is located next to the main unit.

Diagram
1 reducer heater 30
2 reagent dosing system 10
R1 reagent dosing system relay

In the cabin

The location of the fuse box in the cabin on the passenger side.
The first block is located at the end of the dashboard on the passenger side.

Assigment of fuses in the block on the passenger side
No. Purpose A
1 Anti-theft system 5
2 transmission control module 15
3 Front climate control fan 40
4 Engine power 35
5 empty -
6 Engine control module 5
7 Control module (front right door) 7.5
8 Front passenger window 30
9 ESC control module 10
10 25
11 Rear right power window 30
12 Front passenger seat (pneumatic) 15

Installation location of the fuse box in the passenger compartment on the driver
The second fuse box is located at the end of the dashboard on the driver's side.

The diagram of elements in the block on the driver's side
Panel (B)
No. Purpose A
1 Headlight switch 5
2 Emergency start (ID key) 5
3 Control module (rear left door) 7.5
5 Sound signal 15
6 Interior lighting (ceiling) 7.5
8 Steering column handle, heated steering wheel, multi-steering wheel 10/5
10 Steering column adjustment 5
11 Control module (driver's door) 7.5
12 Diagnostic connector, light/rain sensor ten
14 Steering column adjustment 25
15 Power steering, air conditioning compressor 20
16 brake booster 15
Panel (C)
1 Heated front seats 30
2 Wiper 30
3 Front exterior lighting 30
4 Luke 20
5 Driver window 30
6 Driver's seat (pneumatic) 15
7 panoramic sunroof 20
8 Dynamic Steering 35
9 Front exterior lighting 30
10 Windshield washer, headlight washer 35
11 Rear left power window 30
12 panoramic sunroof 40

In the engine compartment

Location of the main fuse box in the engine compartment.
The main unit is located on the right side (in the direction of travel) behind the protective cover.

Diagram
No. Description A
1 Mass air flow meter 5
2 empty -
3 empty -
4 The engine control unit 15
Engine control unit 2
5 Cooling fan control unit 5
Fuel pump control unit
Fan
Fuel pump relay
6 brake light switch 5
7 Glow plug control unit 10
Electro-hydraulic left engine mount
Transmission mounting electromagnets
Transmission oil cooling valve
8 Oil level and temperature sensor 5
9 Transmission mounting electromagnets 10
Fuel pressure control valve
Fuel metering valve
10 oxygen sensors 15
11 Glow plug control unit 15
Right electro-hydraulic engine mount solenoid
Exhaust cooler valve
Oil pressure control valve
Coolant Bypass Valve
Special connector
Transmission mounting electromagnets
12 EGR coolant pump 15
coolant circulation pump
13 glow plug 80
14 glow plug 50
R8 Glow plug control unit
R9


The additional block is behind facing in front of a motor compartment.

Scheme
No. Purpose A
1 Cooling Fan 40/60
2 40/60
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