AUDI A2 2003 – 1.4 litre fuel injection engine (55 kW – Magneti Marelli – 4-cylinder), engine code BBY . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A2 2003 - Battery - starter - alternator - ignition/starter switch - fuses on fuse box

A	Battery
B	Starter
C	Alternator
D	Ignition/starter switch
S88	Strip fuse
SB30	Fuse -30- on fuse box
SB38	Fuse -38- on fuse box
T17	17-pin connector, brown, in footwell, front left
T17e	17-pin connector, blue, in footwell, front left
65	Earth point, left longitudinal member, rear, between B and C pillar
500	Screw connection -1- (30), on relay plate
A2	Positive (+) connection (15), in dash panel wiring harness
A32	Positive (+) connection (30), in dash panel wiring harness
A86	Connection (50a), in dash panel wiring harness
A98	Positive (+) connection -4- (30), in dash panel wiring harness
B177	Connection (61), in interior wiring harness
P2	Positive (+) connection (30), in battery wiring harness

Wiring Diagram AUDI A2 2003 - Fuel pump relay - airbag control unit - 4LV (injection system) control unit - fuses on fuse box

J17	Fuel pump relay
J234	Airbag control unit
J537	4LV (injection system) control unit
SB18	Fuse -18- on fuse box
SB19	Fuse -19- on fuse box
SB20	Fuse -20- on fuse box
SB31	Fuse -31- on fuse box
SB45	Fuse -45- on fuse box
T6f	6-pin connector, green, in footwell, front left
T17	17-pin connector, brown, in footwell, front left
T17e	17-pin connector, blue, in footwell, front left
12	Earth point, in engine compartment, left
44	Earth point, lower part of left A pillar
277	Earth connection -3-, in interior wiring harness
279	Earth connection -5-, in interior wiring harness
284	Earth connection -6-, in interior wiring harness
A2	Positive (+) connection (15), in dash panel wiring harness
A100	Connection -2- (87), in dash panel wiring harness
A125	Connection (crash signal), in dash panel wiring harness

Wiring Diagram AUDI A2 2003 - Lambda probe - lambda probe downstream of catalytic converter - injectors - activated charcoal filter system solenoid valve 1 (pulsed)

G39	Lambda probe
G130	Lambda probe downstream of catalytic converter
J537	4LV (injection system) 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 (pulsed)
T4a	4-pin connector, brown, in engine compartment, left
T6b	6-pin connector, black, in engine compartment, right
Z19	Lambda probe heater
Z29	Lambda probe 1 heater, downstream of catalytic converter
D80	Positive (+) connection (87a - for activated charcoal filter system solenoid valve), in engine compartment wiring harness
D140	Connection (injectors), in engine wiring harness

Wiring Diagram AUDI A2 2003 - Exhaust gas recirculation potentiometer - throttle valve module - heater element (crankcase breather)

G186	Throttle valve drive (electric power control)
G187	Throttle valve drive angle sender -1- (electric power control)
G188	Throttle valve drive angle sender -2- (electric power control)
G212	Exhaust gas recirculation potentiometer
J338	Throttle valve module
J537	4LV (injection system) control unit
N18	Exhaust gas recirculation valve
N79	Heater element (crankcase breather)
T6f	6-pin connector, green, in footwell, front left
12	Earth point, in engine compartment, left
D141	Connection (5V), in engine wiring harness

Wiring Diagram AUDI A2 2003 - Cruise control system switch - brake light switch - accelerator pedal position senders - 4LV (injection system) control unit

E45	Cruise control system switch
F	Brake light switch
G79	Accelerator pedal position sender
G185	Accelerator pedal position sender -2-
J537	4LV (injection system) control unit
T10n	10-pin connector, black, behind steering column switch trim
T17	17-pin connector, brown, in footwell, front left
T17e	17-pin connector, blue, in footwell, front left
A16	Connection (cruise control system), in dash panel wiring harness
B131	Connection (54), in interior wiring harness
B149	Positive (+) connection -2- (15a), in interior wiring harness
*	Only applies to models with cruise control system

Wiring Diagram AUDI A2 2003 - Coolant temperature senders - engine speed sender - Hall sender - knock sensor - intake manifold pressure sender

G2	Coolant temperature sender
G28	Engine speed sender
G40	Hall sender
G61	Knock sensor I
G62	Coolant temperature sender
G71	Intake manifold pressure sender
G72	Intake manifold temperature sender
J537	4LV (injection system) control unit
T17	17-pin connector, brown, in footwell, front left
220	Earth connection (sender earth), in engine wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness

Wiring Diagram AUDI A2 2003 - 4LV (injection system) control unit - ignition coils with output stage - spark plug connector - spark plugs

J537	4LV (injection system) control unit
N70	Ignition coil 1 with output stage
N127	Ignition coil 2 with output stage
N291	Ignition coil 3 with output stage
N292	Ignition coil 4 with output stage
P	Spark plug connector
Q	Spark plugs
12	Earth point, in engine compartment, left
19	Earth point, near ignition coil
221	Earth connection (engine earth), in engine wiring harness
D51	Positive (+) connection -1- (15), in engine compartment wiring harness

Wiring Diagram AUDI A2 2003 - Air conditioning system/Climatronic operating and display unit - clutch pedal switch - 4LV (injection system) control unit

E87	Air conditioning system/Climatronic operating and display unit
F36	Clutch pedal switch
J537	4LV (injection system) control unit
N280	Air conditioning system compressor regulating valve
T16	16-pin connector, diagnostic connector, black, near fuse box
T17	17-pin connector, brown, in footwell, front left
T17e	17-pin connector, blue, in footwell, front left
12	Earth point, in engine compartment, left
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
*	Only applies to models with air conditioner

Wiring Diagram AUDI A2 2003 - Oil pressure switch - fuel pump (pre-supply pump) - oil level/oil temperature sender - control unit with display in dash panel insert

F1	Oil pressure switch
G	Fuel gauge sender
G1	Fuel gauge
G6	Fuel pump (pre-supply pump)
G9	Oil temperature gauge
G266	Oil level/oil temperature sender
J285	Control unit with display in dash panel insert
K2	Alternator warning lamp
T6f	6-pin connector, green, in footwell, front left
T17	17-pin connector, brown, in footwell, front left
T17e	17-pin connector, blue, in footwell, front left
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
12	Earth point, in engine compartment, left
269	Earth connection (sender earth) -1-, in dash panel wiring harness
277	Earth connection -3-, in interior wiring harness
279	Earth connection -5-, in interior wiring harness
B135	Connection -1- (15a), in interior wiring harness
*	Only applies to models with air conditioner
**	No longer fitted, phased-in modification
***	Phased-in modification

Wiring Diagram AUDI A2 2003 - Oil pressure switch - fuel pump (pre-supply pump) - oil level/oil temperature sender - control unit with display in dash panel insert

F1	Oil pressure switch
G	Fuel gauge sender
G6	Fuel pump (pre-supply pump)
G266	Oil level/oil temperature sender
J104	ABS with EDL control unit
J285	Control unit with display in dash panel insert
K2	Alternator warning lamp
T6f	6-pin connector, green, in footwell, front left
T17	17-pin connector, brown, in footwell, front left
T17e	17-pin connector, blue, in footwell, front left
T17g	17-pin connector, red, connector point, A pillar, left
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
85	Earth connection -1-, in engine compartment wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness
277	Earth connection -3-, in interior wiring harness
B135	Connection -1- (15a), in interior wiring harness
*	Only applies to models with air conditioner