The UK quattro Network

1980/81 Audi ur-quattro Main Diagram Index

There are also notes to these diagrams.

Component	Designation	Track
Battery	A	7
Starter	B	4-6
Alternator	C	2
Voltage regulator	C1	2
Ignition switch	D	54-56
Light switch	E1	57-61
Indicator switch	E2	90
Hazard flasher switch	E3	88-91
Dip switch and headlight flasher	E4	58
Switch for fresh air fan	E9	44
Switch for heated rear screen	E15	85
Switch for parking light	E19	55
Switch for interval wipers	E22	37,38
Switch for fog lights	E23	120, 121
Switch on centre differential	E81	46
Switch on rear differential	E82	45
Switch for brake lights	F	82
Switch for oil pressure	F1	100
Switch, left door	F2	66
Switch, right door	F3	65
Switch for reversing lights	F4	48
Switch, boot light	F5	68
Switch, handbrake warning	F9	103
Switch, coolant temperature	F14	104
Thermoswitch for radiator fan	F18	27
Switch, brake assist warning	F21	101
Full load enrichment switch	F25	47
Thermo-timeswitch	F26	23, 24
Switch, brake fluid warning	F34	102
Switch, cold coolant warning	F52	107
Idle switch for ECU	F60	16
Thermoswitch for injector cooling fan	F61	31
Boost overpressure switch	F64	29
Fuel level sender	G	99
Fuel gauge	G1	109
TDC sender	G4	18
Rev counter	G5	111
Electric fuel pump	G6	22
RPM Sender	G28	15
Hall sender	G40	12, 13
Inlet air temperature sender	G42	14
Horn switch	H	50
Horn	H1	52
Hazard flasher relay	J2	89
Horn relay	J4	50, 51
Relay for hazard flashers	J5	122-123
Dashboard voltage regulator	J6	108
Fuel pump relay	J17	20
Radiator fan relay	J26	27, 28
Interval relay for wipers	J31	36, 37
Relay for headlight washers	J39	39, 40
Load reduction relay	J59	52, 53
Blocking diode for K28	J62	106
Blocking diode for brake control	J67	105
Engine control unit	J88	12-19
Pulse relay for cold start control	J95	25, 26
Relay for injector cooling fan	J97	30, 31
Control unit for gear change indicator	J98	113-115
Control lamp for main beam	K1	79
Control lamp for alternator	K2	106
Control lamp for oil pressure	K3	108
Control lamp for indicators	K5	110
Control lamp for hazard flashers	K6	91
Control lamp for heated rear windscreen	K10	117
Control lamp for rear fog light	K13	118
Control lamp for handbrake	K14	105
Control lamp for coolant (too hot)	K28	107
Control lamp for coolant (too cold)	K43	107
Control lamp for centre differential	K45	46
Control lamp for rear differential	K46	45
Bulb, left dipped beam	L1	76
Bulb, right dipped beam	L2	78
Bulb, light switch illumination	L9	116
Bulb, dashboard illumination	L10	60, 61
Bulb, left main beam	L13	77
Bulb, right main beam	L14	80
Bulb, rear fog light	L20	120
Bulb, heater controls	L21	59
Bulb, left fog light	L22	123
Bulb, right fog light	L23	121
Bulb, cigarette lighter	L28	62
Bulb, hazard flasher switch	L35	87
Bulb, heated rear screen switch	L39	86
Bulb, fog light switch	L40	117
Bulb, left sidelight	M1	72
Bulb, rear left sidelight light	M2	75
Bulb, right sidelight	M3	73
Bulb, rear right sidelight light	M4	71
Bulb, front left indicator	M5	92
Bulb, rear left indicator	M6	94
Bulb, fron right indicator	M7	95
Bulb, rear right indicator	M8	98
Bulb, left brake light	M9	81
Bulb, right brake light	M10	82
Bulb, left reversing light	M16	48
Bulb, left side repeater	M18	93
Bulb, right side repeater	M19	96
Ignition coil	N	10
Control pressure regulator	N9	18
Cold start valve	N17	24
Auxiliary air valve	N21	20
Resistance pack for fresh air fan	N23	44
Ignition output stage	N41	11-13
Two-way valve for full load enrichment	N54	47
Distributor	O	10
Plug cap	P	8-11
Spark plugs	Q	8-11
Fuse	S9
Fuse	S10
Fuse	S11
Separate fuse for ECU	S31
Connector, 1 pole, right engine bay	T1
Connector, 1 pole, right engine bay	T1a
Connector, 1 pole, behind dashboard	T1b
Connector, 1 pole, behind dashboard	T1d
Connector, 1 pole, behind dashboard	T1e
Connector, 1 pole, under rear seat	T1f
Connector, 1 pole, left engine bay	T1g
Connector, 1 pole, left engine bay	T1h
Connector, 1 pole, behind dashboard	T1j
Connector, 1 pole, behind dashboard	T1l
Connector, 1 pole, behind centre console	T1r
Connector, 1 pole, behind dashboard	T1t
Connector, 2 pole, near relay panel	T2
Connector, 3 pole, near distributor	T3
Connector, 3 pole, near distributor	T3a
Connector, 3 pole, behind dashboard	T3b
Connector, 4 pole, behind centre console	T4b
Connector, 7 pole, behind dashboard	T7
Connector, 9 pole, behind dashboard	T9
Connector, 9 pole, left engine bay	T9a
Connector (Mas-Mate), 9 pole, left rear lights	T10a
Connector (Mas-Mate), 9 pole, left rear lights	T10b
Connector (Mas-Mate), 9 pole, right rear lights	T10b
Cigarette lighter	U1	63
Wiper motor	V	32-34
Fresh air fan	V2	42
Screen washer pump	V5	35
Radiator fan	V7	28
Headlight washer pump	V11	40
Interior light	W	66
Boot light	W3	68
Glove box light	W6	64
Injector cooling fan	V38	30
Number plate lights	X	69, 70
Clock	Y	112
Heated rear screen	Z1	83

Chassis grounds are shown circled in the diagrams:

Ground	Location
1	Battery to chassis
2	Gearbox to chassis
7	Engine to alternator
8	Behind dashboard
9	Left engine bay
10	Right engine bay
11	Left side of boot
14	Under rear seat
16	Parcel shelf
17	Near handbrake lever
18	Under roof
20	Left roof of boot

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