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 circuits of the Audi A8 (D3 / 4E) of the 2nd generation of 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 of release.
Here you will find the locations and photos of the mounting blocks. Separately, we note the fuse responsible for the fuel pump and cigarette lighter.
In the engine compartment
It is located in the center of the engine compartment behind the lining.
Diagram
No.
Description
A
1
not used
2
secondary air pump
50/60/80
Or
glow plug
3
secondary air pump
50/60/80
Or
glow plug
4
not used
5
6
7
R1
Glow plug relay
Secondary air pump relay
R2
Glow plug relay
Main relay
Secondary air pump relay
R3
Glow plug relay
Secondary air pump relay
Main relay
R4
not used
In the passenger compartment
There are two fuse mounting blocks and two relay boards here.
Fuse box #1
Located on the driver's side at the end of the dashboard behind a plastic cover.
General form.
Diagram of the fuse box No. 1 on the driver's side
No.
A
Purpose
1
5
garage door opener (HomeLink)
2
5
parking assistance (acoustic parking system)
3
5
4
10
automatic headlight beam throw adjustment
5
5
instrument cluster
6
10
steering column electronics control unit
7
5
diagnostic plug
8
5
9
5
electronic stability program (ESP)
10
5
instrument cluster
11
-
is absent
12
5
brake light switch
13
10
telephone
14
-
is absent
15
5
driver identification system control unit
16
-
is absent
17
5
distance maintenance (adaptive cruise control)
18
5
heated windshield washer jets
19
-
is absent
20
5
tire pressure monitoring system
21
-
is absent
22
5
brake light switch
23
5
telepassport
24
15
sound signal
25
40
wiper
26
-
is absent
27
25
electronic stability program (ESP)
28
-
is absent
29
10
lighting switches
30
-
is absent
31
30
onboard power supply control unit, front right lighting
32
-
is absent
33
25
additional space heater for hoi rear left
34
-
is absent
35
-
is absent
36
-
is absent
37
-
is absent
38
30
onboard power supply control unit, lighting front left
39
7.5
front left door control unit
40
25
steering column adjustment
41
7.5
rear left door control unit
42
25
start identification/permission control unit
43
-
is absent
44
-
is absent
Fuse box #2
Located on the passenger side behind a plastic cover.
Assigment of fuses in the passenger side
No.
A
Description
1
5
electromechanical parking brake
2
10
air conditioning
3
5
shift gate, PN-lock
4
15
automatic transmission (multitronic)
5
15
engine management
6
15
lambda probes
7
15/10
lambda probes/high pressure valve
8
10
engine management, auxiliary water pump
9
5
air conditioning, instrument panel keys
10
10
air suspension (adaptive air suspension)
11
5
light and rain sensor
12
5
display/control unit front
13
10
electronics in the ceiling
14
5
media player in front (CD player, DVD player, etc.)
15
5
battery-energy management system
16
5
heating crankcase ventilation system
17
5
jura valve electronics
18
-
is absent
19
5
diesel air mass sensor
20
5
air-conditioned seat
21
5/15
engine management (gasoline/diesel)
22
10
fuel cooling
23
5
electromechanical parking brake
24
10
onboard power supply control unit 2
25
15
automatic transmission
26
10
water pump/A/C valves, rear A/C controls
27
20
sliding roof panel
28
5
the engine control unit
29
15
Valve injectors
30
30
ignition coils
31
20/40
fuel pump right/fuel pump electronics (petrol)
32
5/10)
automatic transmission/multitronic
33
25
additional heating gel legroom rear right
34
20
heated/ventilated rear seats
35
20
Heated/ventilated front seats
36
20
Front cigarette lighter audi a8 d4
37
20/30
rear cigarette lighter and sockets
38
20
additional radiator fan
39
7.5
front right door control unit
40
15
brake booster
41
7.5
rear right door control unit
42
20
auxiliary heater/auxiliary heater
43
30
headlight cleaner
44
30
heater fan
Relay box #1
Located behind the trim at the passenger's feet.
Diagram
No.
Purpose
A
R1
Cooling Fan Relay
Cooling Fuel Pump Relay
Brake servomotor
additional coolant pump
Coolant circulation relay
R2
Starter relay
R3
R4
Fuel pump relay
Or
Power relay
R5
Headlight washer relay
1
Front right window lifter
30
Or
empty
2
Seat adjustment
30
3
blower
30
Or
Front right window lifter
Or
empty
4
Seat adjustment
30
5
not used
6
Relay box #2
Located behind the trim on the driver's side.
Diagram
No.
Purpose
A
1
ABS control unit
60
2
Leveling system
40
3
Power window
30/40
4
Seat adjustment
30
5
30
6
not used
7
not used
8
not used
R1
Adaptive Suspension Compressor Relay
R2
signal relay
R3
Terminal 15 supply voltage relay
R4
Washer heating relay
R5
Security system control unit (taxi)
R6
Terminal 75 supply voltage relay
R7
empty
R8
empty
R9
empty
R10
empty
In the luggage compartment
There are two blocks here.
Fuse box #1
Block number 1 is on the right side behind the skin.
Access example.
General form.
Diagram
No.
A
Description
1
20
fuel pump right (diesel)
2
20
fuel pump on the left (gasoline / diesel)
3
15
trailer socket
4
-
is absent
5
20
intelligent power module at the rear (light on the left)
6
10
intelligent power module at the rear (light on the right)
7
20
intelligent rear power module (trunk closing assist)