Audi TT (8J; 2006 - 2014) fuses and relays

Audi TT is a compact coupe of the German company. Produced since 1998 in Gyor, Hungary. In this article, we will take a detailed look at the fuse diagrams for the the Audi TT (8J) 2nd generation 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014 release.

Here you will find the locations and photos of distribution boxes. The fuses responsible for the “Cigarette lighter” and “Fuel Pump” are highlighted in bold.

In the engine compartment

The distribution box is located on the left side of the engine compartment. To access, remove the protective cover.

Type 1

The photo shows an example.

Assigment of fuses in the engine compartment
No.	A	Description
black panel
1		-
2		-
3		-
4		-
5	5	burglar alarm (sensor), burglar alarm (horn)
6	30	headlight cleaner audi tt
7	15/10	electric fuel pumps (supply) / fuel flow control valve
8	30	wiper
9	25	seat heating (driver and front passenger)
10	10	lumbar support (driver and front passenger)
11		-
12	40	fan
Brown panel
1	15	petrol pump (6-cyl.)
2	10	lambda probes (6-cyl.)
3	5	air mass meter (6-cyl.)
4	10	lambda probes (6-cyl.)
5	5	relay coil, fuel control valve relay (4-cyl.)
6	10	secondary air pump valve (6-cyl.), lambda probes (4-cyl.)
7	10	pre-engine wiring set valves
8	20/30	ignition coils (4-cyl.)/ignition coils (6-cyl.)
9	25	engine (control unit)
10	10	water return pump
11	5	power supply (clutch pedal, brake pedal)
12	10	activated carbon filter/boost pressure control - valve (4-cyl.)

Type 2

Access example.

Diagram
No.	Description	A
1	empty	-
2	empty	-
3	empty	-
4	empty	-
5	Sound signal;	5
	Security alarm.
6	headlight washer pump	30
7	Fuel pressure control valve	20
8	Wiper control unit	30
9	Heated driver's seat;	25
	Heated front passenger seat.
10	Driver's seat adjustment;	10
	Front passenger seat adjustment.
11	empty	-
12	Supply fan control unit;	40
13	empty	-
14	empty	-
15	empty	-
16	empty	-
17	empty	-
18	oxygen sensor;	10
19	Radiator fan controller;	10
	Fuel system diagnostic pump.
20	Ignition coils	20
21	The engine control unit	15
22	Coolant circulation pump;	10
23	Clutch position sensor	5
24	Power relay; Canister purge solenoid valve;	10
	Valve for adjusting the valve timing;
	Turbo bypass valve;
	Oil pressure control valve.
25–51	empty
R1	Headlight washer relay (if equipped)
R2	Fuel pump relay
R3	Coolant circulation relay
R4	Secondary air pump relay
R5	Motronic Power Relay
R6	Power relay

In the passenger compartment

The distribution box is located on the driver's side behind a plastic cover.

Photo - general view of the board.

Diagram
No.	A	Decryption
1	10	engine relay, fuel control unit o engine control unit, airbag-off lamp, light switch (light switches) diagnostic socket
2	5	ABS, ASR, ESP, brake light switch
3	5	AFS headlights (left)
4	5	oil level sensor (WIV), tire pressure indicator, electronic stability control (ESP) switch, AFS headlights (control unit), air conditioning (pressure sensor), reversing light switch
5	5/10	automatic headlight beam throw, AFS headlights (right) / manual headlight beam throw, halogen headlights
6	5	CAN data communication control unit (Gateway), electromechanical power steering, automatic transmission shift gate
7	5	park assist, auto shielding interior rear view mirror, garage door opener, heated windshield washer jets, windshield washer pump, windshield relay (Roadster)
8	5	Haldex coupling
9	5	Audi magnetic rail control unit
10	5	airbag control unit
11	5/10	air mass meter, crankcase heating
12	10	door control unit (central locking system driver/front passenger)
13	10	diagnostic socket
14	5	rain sensor, automatic transmission shift gate
15	5	ceiling light
16	10	air conditioning (control unit)
17	5	tire monitoring indication (control unit)
18		-
19		-
20		-
21	10	valve injectors (petrol engine)
22	30	windscreen (Roadster)
23	20	sound signal
24	15	transmission (control unit)
25	30/20	heated rear window Coupe/Roadster
26	30	power window driver's side
27	30	power window passenger side
28		-
29	15	washer pump
30	20	audi tt cigarette lighter fuse
31	40	starter
32	5	steering column module
33	5	instrument cluster
34	15	radio navigation system, radio
35	30	sound amplifier
36	10	engine (control unit)
37	5	CAN (Gateway)
38	20	second cigarette lighter
39		-
40		-
41		-
42		-
43		-
44		-
45		-
46		-
47	5	SDARS tuner, mobile phone connection preparation, TV tuner
48	5	VDA interface
49		-

Additional relay blocks

Located next to the main unit.

Diagram
Relay box (Type 1 - from 06/2009)
1	No information
2
3
4
R1	Terminal 15 supply relay
R2	Heated rear window relay
R3	Horn relay
R4	Headlight washer relay
R5	Not used
R6
Relay box (Type 2 - up to 05/2009)
R1	Terminal 15 supply relay
R2	Not used
R3
R4	Terminal 30 supply relay
R5	Heated rear window relay
R6	Horn relay
R1	not used
R8	Headlight washer relay
R9	not used
Additional fuse box
1	-
2	-
3	Driver's seat adjustment 20A
4	-
R1	Not used
R2	cigarette lighter relay
R3	Control relay
R4	-
R5	heating relay
R6	-
R1	terminal 50 supply voltage relay
R8	no information
R9	windshield convertible relay

In the trunk

Under the casing on the right is an additional relay box. Near the battery there is a power module consisting of high-power fusible links.

Relay block diagram
No.	Description	A
1	Power control unit	5
2		40
3	empty	-
4	Hydraulic pump, convertible roof.
5	Parking assistant controller;	5
6	Fuel pump control module	50
7	Power control unit	40
8	ABS control unit	20
9	Electronic Throttle Control Unit	30
10	Comfort system control unit;	10/20
	Power control unit
11	convertible roof	25
12	Comfort control unit	5
13	empty
14	empty
15	empty

Power fuses

Located near the battery.

diagram
No.	Description	A
FL1	Generator	175
FL2	Power steering control unit	80
FL3	Radiator fan controller;	60
FL4	Fuse and relay box in the engine compartment	110
FL5	secondary air pump	40
FL6	empty	-
FL7	empty	-
FL8	empty	-