AUDI A4 2002 – Audi A4 (2.8 l fuel injection engine, 142 kW, Motronic (5 valve), 6-cylinders), engine codes ALG . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A4 2002 - Earth connections

3	Earth strap, engine support right, to longitudinal member right, front
12	Earth point, in engine compartment, left
32	Earth point, behind dash panel, left
43	Earth point, lower part of right A-pillar
81	Earth connection -1-, in dash panel wiring harness
83	Earth connection -1-, in front right wiring harness
86	Earth connection -1-, in rear wiring harness
87	Earth connection -2-, in rear wiring harness
135	Earth connection -2-, in dash panel wiring harness
176	Earth connection, in right headlight wiring harness
196	Earth connection -3-, in rear wiring harness

Wiring Diagram AUDI A4 2002 - Battery - starter - alternator

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
T2ab	2-pin connector, grey, in engine compartment, right
T6z	6-pin connector, red, connector point, electronics box, plenum chamber
11	Earth point, in battery box
44	Earth point, lower part of left A pillar
81	Earth connection -1-, in dash panel wiring harness
179	Earth connection, in left headlight wiring harness

Wiring Diagram AUDI A4 2002 - Motronic control unit - fuel pump relay - injectors

J17	Fuel pump relay
J220	Motronic control unit
N30	Injector, cylinder 1
N31	Injector, cylinder 2
N32	Injector, cylinder 3
N33	Injector, cylinder 4
N80	Activated charcoal filter system solenoid valve 1
N83	Injector, cylinder 5
N84	Injector, cylinder 6
N112	Secondary air inlet valve
N156	Intake manifold change-over valve
N205	Inlet camshaft timing adjustment valve -1-
N208	Inlet camshaft timing adjustment valve -2-
T6z	6-pin connector, red, connector point, electronics box, plenum chamber
T10z	10-pin connector, yellow, connector point, electronics box, plenum chamber
A86	Connection (50a), in dash panel wiring harness
D22	Connection (via fuse 234), in front right wiring harness
D23	Connection (via fuse 229), in front right wiring harness
*	Only engine codes ALG

Wiring Diagram AUDI A4 2002 - Motronic control unit - coolant temperature sender - knock sensors

E87	Control and display unit for air conditioner
G2	Coolant temperature sender
G18	Temperature sensor
G61	Knock sensor I
G62	Coolant temperature sender
G66	Knock sensor II
J217	Automatic gearbox control unit
J220	Motronic control unit
T3n	3-pin connector, blue, in engine compartment, left
T3o	3-pin connector, blue, in engine compartment, left
T10	10-pin connector, brown, connector point, electronics box, plenum chamber
T10m	10-pin connector, black, connector point, electronics box, plenum chamber
T10v	10-pin connector, brown, right connector point, A pillar
T10z	10-pin connector, yellow, connector point, electronics box, plenum chamber
83	Earth connection -1-, in front right wiring harness
199	Earth connection -3-, in dash panel wiring harness
220	Earth connection (sender earth), in engine wiring harness
A27	Connection (speed signal), in dash panel wiring harness
A45	Connection (engine speed signal), in dash panel wiring harness
*	Only models with automatic gearbox (only with 2.8 l Motronic)
**	Only models with air conditioner

Wiring Diagram AUDI A4 2002 - Motronic control unit - engine speed sender - throttle valve control unit - secondary air pump

G28	Engine speed sender
J220	Motronic control unit
J316	Secondary air system relay
J338	Throttle valve control unit
S130	Secondary air pump fuse
T3m	3-pin connector, grey, in engine compartment, left
T10	10-pin connector, brown, connector point, electronics box, plenum chamber
T10z	10-pin connector, yellow, connector point, electronics box, plenum chamber
V101	Secondary air pump motor
83	Earth connection -1-, in front right wiring harness
220	Earth connection (sender earth), in engine wiring harness
A40	Positive (+) connection -1- (30), in dash panel wiring harness
A70	Positive (+) connection (15a, fuse 231), in dash panel wiring harness
*	Only engine codes ALG
**	See applicable Current Flow Diagram: ABS
***	Only models with front-wheel drive

Wiring Diagram AUDI A4 2002 - Motronic control unit - hall sender - diagnostic connector

E87	Control and display unit for air conditioner
G40	Hall sender 1
G163	Hall sender 2
J60	Automatic gearbox relay
J217	Automatic gearbox control unit
J220	Motronic control unit
J234	Airbag control unit
J446	Parking aid control unit
T6ah	6-pin connector, green, right connector point, A pillar
T10v	10-pin connector, brown, right connector point, A pillar
T10x	10-pin connector, blue, right connector point, A pillar
T10y	10-pin connector, blue, connector point, electronics box, plenum chamber
T10aa	10-pin connector, orange, right connector point, A pillar
T10ab	10-pin connector, white, right connector point, A pillar
T16	16-pin connector, in centre console rear
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
A76	Connection (diagnosis wire K), in dash panel wiring harness
*	Only models with automatic gearbox (only with 2.4 l Motronic)
**	Only models with parking aid
***	Only models with air conditioner
****	Only models with automatic gearbox

Wiring Diagram AUDI A4 2002 - Motronic control unit - lambda probes with heating - air mass meter

G39	Lambda probe I
G70	Air mass meter
G108	Lambda probe II
J189	Auto-check system
J220	Motronic control unit
T4y	4-pin connector, black, in engine compartment, right
T4z	4-pin connector, black, in engine compartment, left
T10	10-pin connector, brown, connector point, electronics box, plenum chamber
T10y	10-pin connector, blue, connector point, electronics box, plenum chamber
T10z	10-pin connector, yellow, connector point, electronics box, plenum chamber
T16	16-pin connector, (diagnosis connection), in centre console rear
Z19	Lambda probe heater I
Z28	Lambda probe II heater
81	Earth connection -1-, in dash panel wiring harness
83	Earth connection -1-, in front right wiring harness
200	Earth connection (screening), in engine compartment wiring harness
*	Only models with automatic gearbox
**	Only models with auto-check system

Wiring Diagram AUDI A4 2002 - Motronic control unit - ignition system

J217	Automatic gearbox control unit
J220	Motronic control unit
N	Ignition coil 1
N122	Final output stage 1
N128	Ignition coil 2
N158	Ignition coil 3
P	Spark plug connector
Q	Spark plugs
T5d	5-pin connector, near ignition coil
T6z	6-pin connector, red, connector point, electronics box, plenum chamber
T10x	10-pin connector, blue, right connector point, A pillar
T15	10-pin connector, white, connector point, electronics box, plenum chamber
83	Earth connection -1-, in front right wiring harness
A20	Connection (15a), in dash panel wiring harness
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
D14	Connection (ignition coil - control unit), in front right wiring harness
*	Only models with automatic gearbox (only with 2.8 l Motronic)
•	Data wire (CAN bus)

Wiring Diagram AUDI A4 2002 - Ignition/starter switch - X contact relief relay

D	Ignition/starter switch
J59	X contact relief relay
J234	Airbag control unit
T6ah	6-pin connector, green, right connector point, A pillar
T10	10-pin connector, brown, connector point, electronics box, plenum chamber
T15a	15-pin connector, black, right connector point, A pillar
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
A2	Positive (+) connection (15), in dash panel wiring harness
A17	Positive (+) connection (61), in dash panel wiring harness
A21	Positive (+) connection (86s), in dash panel wiring harness

Wiring Diagram AUDI A4 2002 - Tail light - brake light - reversing light

F	Brake light switch
F4	Reversing light switch
L46	Rear fog light bulb, left
L47	Rear fog light bulb, right
M2	Tail light bulb, right
M4	Tail light bulb, left
M6	Turn signal bulb, rear left
M8	Turn signal bulb, rear right
M9	Brake light bulb, left
M10	Brake light bulb, right
M16	Reversing light bulb, left
M17	Reversing light bulb, right
M25	High level brake light bulb
T6e	6-pin connector, blue, left connector point, A pillar
T10	10-pin connector, brown, connector point, electronics box, plenum chamber
T10a	10-pin connector, brown, left connector point, A pillar
T10m	10-pin connector, black, connector point, electronics box, plenum chamber
86	Earth connection -1-, in rear wiring harness
196	Earth connection -3-, in rear wiring harness
A18	Connection (54), in dash panel wiring harness
A87	Connection (reversing light), in dash panel wiring harness
*	Only models with manual gearbox

Wiring Diagram AUDI A4 2002 - Lighting switch

E1	Lighting switch
E4	Headlight dipper/flasher switch
E19	Parking light switch
A9	Positive (+) connection (56b), in dash panel wiring harness
A32	Positive (+) connection (30), in dash panel wiring harness
A43	Connection (57l), in dash panel wiring harness
A44	Connection (57r), in dash panel wiring harness
A51	Connection (56), in dash panel wiring harness
*	Only models with fog light
**	Does not apply to fog light

Wiring Diagram AUDI A4 2002 - Fuse box - number plate light - glove box light - heated washer jets

E168	Mirror with folding function, adjustment switch
T2f	2-pin connector, on bonnet
T2g	2-pin connector, on bonnet
T10a	10-pin connector, brown, left connector point, A pillar
T10c	10-pin connector, violet, left connector point, A pillar
T15a	15-pin connector, black, right connector point, A pillar
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
W6	Glove box light
X	Number plate light
Z20	Heater element, left washer jet
Z21	Heater element, right washer jet
81	Earth connection -1-, in dash panel wiring harness
87	Earth connection -2-, in rear wiring harness
A3	Positive (+) connection (58), in dash panel wiring harness
A34	Connection (75x), in dash panel wiring harness
A37	Connection (58a), in dash panel wiring harness
A74	Positive (+) connection (15a, fuse 5), in dash panel wiring harness
Q53	Positive (+) connection (15), in anti-theft alarm system wiring harness
W2	Positive (+) connection (58), in rear wiring harness
*	Only models with heated washer jets
**	Only models with side light warning lamp for Italian export version

Wiring Diagram AUDI A4 2002 - Fuse box - horn

H	Horn plate
H2	High tone horn
H7	Low tone horn
J4	Dual tone horn relay
T5g	5-pin connector, behind steering column switch trim
T6a	6-pin connector, red, right connector point, A pillar
T6e	6-pin connector, blue, left connector point, A pillar
T16	16-pin connector, (diagnosis connection) in centre console rear
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
135	Earth connection -2-, in dash panel wiring harness
176	Earth connection, in right headlight wiring harness
A1	Positive (+) connection (30a), in dash panel wiring harness
A50	Positive (+) connection (30as), in dash panel wiring harness
A72	Connection (71), in dash panel wiring harness
A90	Connection (dual tone horn), in dash panel wiring harness

Wiring Diagram AUDI A4 2002 - Fuse box - headlights - headlight range control

E102	Headlight range control adjuster
L1	Twin filament bulb for headlight, left
L2	Twin filament bulb for headlight, right
M1	Side light bulb, left
M3	Side light bulb, right
T5	5-pin connector, headlight, right
T5a	5-pin connector, headlight, left
T6	6-pin connector, yellow, right connector point, A pillar
T6a	6-pin connector, red, right connector point, A pillar
T10ad	10-pin connector, red, left connector point, A pillar
T10ae	10-pin connector, light pink, left connector point, A pillar
V48	Headlight range control motor, left
V49	Headlight range control motor, right
135	Earth connection -2-, in dash panel wiring harness
176	Earth connection, in right headlight wiring harness
179	Earth connection, in left headlight wiring harness

Wiring Diagram AUDI A4 2002 - Fuse box - cigarette lighter - rear fog light switch

E18	Rear fog light switch
L28	Cigarette lighter light bulb
T6e	6-pin connector, blue, left connector point, A pillar
T10i	10-pin connector, black, in centre console
U1	Cigarette lighter
81	Earth connection -1-, in dash panel wiring harness
A19	Connection (58d), in dash panel wiring harness
A47	Connection (55), in dash panel wiring harness
A57	Connection (30a), in dash panel wiring harness
*	Without radio, terminal 86s
***	Without radio, terminal 58d
***	Without radio, terminal 30a
****	Diagnosis wire for radio

Wiring Diagram AUDI A4 2002 - Dash panel insert - combi-processor in dash panel insert - handbrake warning switch

F9	Handbrake warning switch
J218	Combi-processor in dash panel insert
K1	Main beam warning lamp
K2	Alternator warning lamp
K4	Side light warning lamp
K14	Handbrake warning lamp
K18	Trailer operation warning lamp
K29	Glow period warning lamp
K65	Left turn signal warning lamp
K86	Traction control system warning lamp
K94	Right turn signal warning lamp
K132	Electronic power control fault lamp
T10af	10-pin connector, red, on radio
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
81	Earth connection -1-, in dash panel wiring harness
135	Earth connection -2-, in dash panel wiring harness
A4	Positive (+) connection (58b), in dash panel wiring harness
A24	Connection (brake system monitoring), in dash panel wiring harness
*	Only models with trailer coupling
**	Only models with side light warning lamp for Italian export version
***	Only models with radio

Wiring Diagram AUDI A4 2002 - Dash panel insert - combi-processor in dash panel insert - coolant monitoring - analogue clock - fuel gauge - rev. counter - speedometer - switches and instruments - lighting control - vehicle speed sender - fuel pump - oil pressure switch

E20	Switches and instruments, lighting control
F1	Oil pressure switch
F66	Coolant shortage indicator switch
G	Fuel gauge sender
G1	Fuel gauge
G3	Coolant temperature gauge
G5	Rev. counter
G6	Fuel pump (pre-supply pump)
G9	Oil temperature gauge
G14	Voltmeter
G21	Speedometer
G22	Speedometer sender (Hall sender, on gearbox)
H3	Buzzer/gong
J218	Combi-processor in dash panel insert
T10a	10-pin connector, brown, left connector point, A pillar
T10m	10-pin connector, black, connector point, electronics box, plenum chamber
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
Y	Analogue clock
32	Earth point, behind dash panel, left
83	Earth connection -1-, in front right wiring harness
86	Earth connection -1-, in rear wiring harness
199	Earth connection -3-, in dash panel wiring harness

Wiring Diagram AUDI A4 2002 - Dash panel insert - combi-processor in dash panel insert - oil temperature sender

D2	Immobilizer reading coil
E87	Control and display unit for air conditioner
G8	Oil temperature sender
J104	ABS with EDL control unit
J218	Combi-processor in dash panel insert
J234	Airbag control unit
K3	Oil pressure warning lamp
K16	Reserve fuel warning lamp
K19	Seat belt warning system warning lamp
K28	Coolant temperature/coolant shortage warning lamp
K32	Brake pad/lining warning lamp
K37	Windscreen washer fluid level warning lamp
K47	ABS warning lamp
K75	Airbag warning lamp
K117	Immobilizer warning lamp
K118	Brake system warning lamp
T10b	10-pin connector, orange, left connector point, A pillar
T10m	10-pin connector, black, connector point, electronics box, plenum chamber
T15a	15-pin connector, black, left connector point, A pillar
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
V94	Central locking motor with control unit for interior lights switch-off delay and anti-theft alarm system
A26	Connection (door contact switch/driver's side), in dash panel wiring harness
R2	Connection (door contact switch, left), in electric window/central locking and door contact switch wiring harness
*	Only models with air conditioner
**	Only models with additional instruments

Wiring Diagram AUDI A4 2002 - Turn signals and hazard warning lights

E2	Turn signal switch
E3	Hazard warning light switch
J2	Hazard warning light relay
K64	Hazard warning light system warning lamp
M5	Turn signal bulb, front left
M7	Turn signal bulb, front right
M18	Side turn signal bulb, left
M19	Side turn signal bulb, right
T3q	3-pin connector, black, at steering column switch
T6	6-pin connector, yellow, right connector point, A pillar
T10ae	10-pin connector, light pink, left connector point, A pillar
81	Earth connection -1-, in dash panel wiring harness
176	Earth connection, in right headlight wiring harness
179	Earth connection, in left headlight wiring harness
A5	Positive (+) connection (right turn signal), in dash panel wiring harness
A6	Positive (+) connection (turn signal, left), in dash panel wiring harness
*	Only models with trailer coupling

Wiring Diagram AUDI A4 2002 - Windscreen washer/wiper system

E22	Intermittent wiper switch
E38	Intermittent wiper control
F34	Brake fluid level warning contact
J31	Automatic intermittent wash/wipe relay
T6al	6-pin connector, black, at steering column switch
T10c	10-pin connector, violet, left connector point, A pillar
T10ad	10-pin connector, red, left connector point, A pillar
T10ae	10-pin connector, light pink, left connector point, A pillar
V	Windscreen wiper motor
V5	Windscreen washer pump
81	Earth connection -1-, in dash panel wiring harness
135	Earth connection -2-, in dash panel wiring harness
A60	Connection (vehicle speed signal), in dash panel wiring harness
A97	Connection (53), in dash panel wiring harness
*	Only models with heated washer jets

Wiring Diagram AUDI A4 2002 - Fresh air blower - heated rear window

E9	Fresh air blower switch
E15	Heated rear window switch
E159	Fresh air/air recirculating flap switch
N24	Series resistor for fresh air blower with overheating resistor
T6e	6-pin connector, blue, left connector point, A pillar
V2	Fresh air blower
V154	Fresh/recirculating air flap control motor
Z1	Heated rear window
81	Earth connection -1-, in dash panel wiring harness
135	Earth connection -2-, in dash panel wiring harness