AUDI A3 2006 – 1.6 litre fuel injection engine (Motronic), 69 kW, 4-cylinder, engine code BAH . Wiring diagrams, Pin Connector, Location

Wiring Diagram AUDI A3 2006 - Battery - starter - alternator - fuses

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
D	Ignition/starter switch
J293	Radiator fan control unit
S131	Fuse 1
S132	Fuse 2
S133	Fuse 3
S134	Fuse 4
S138	Fuse 5
S162	Fuse -1- (30), in fuse box/battery
S163	Fuse -2- (30), in fuse box/battery
S164	Fuse -3- (30), in fuse box/battery
T3e	3-pin connector, black, on main fuse box
T4b	4-pin connector, in engine compartment, left
T6m	6-pin connector, brown, in plenum chamber
2	Earth strap, gearbox - body
12	Earth point, in engine compartment, left
*	Radiator fan control (engine), see applicable Current Flow Diagram: Air conditioner

Wiring Diagram AUDI A3 2006 - Motronic control unit - injectors - fuel pump relay

D	Ignition/starter switch
J17	Fuel pump relay
J220	Motronic control unit
J234	Airbag control unit
N30	Injector, cylinder 1
N31	Injector, cylinder 2
N32	Injector, cylinder 3
N33	Injector, cylinder 4
T6m	6-pin connector, brown, in plenum chamber
T14	14-pin connector, in engine compartment, left
A125	Connection (crash signal), in dash panel wiring harness
B155	Connection -2- (TK (door contact)), in interior wiring harness
D140	Connection (injectors), in engine prewiring wiring harness
*	If fitted

Wiring Diagram AUDI A3 2006 - Motronic control unit - coolant temperature sender - engine speed sender - Hall sender - coolant temperature sender - intake manifold pressure sender - intake air temperature sender

G2	Coolant temperature sender
G28	Engine speed sender
G40	Hall sender
G42	Intake air temperature sender
G62	Coolant temperature sender
G71	Intake manifold pressure sender
J220	Motronic control unit
T3d	3-pin connector, white, engine speed sender, in engine compartment
T14	14-pin connector, in engine compartment, left
220	Earth connection (sender earth), in engine wiring harness
269	Earth connection (sender earth) -1-, in dash panel wiring harness
D103	Connection -3-, in engine compartment wiring harness

Wiring Diagram AUDI A3 2006 - Motronic control unit - throttle valve unit

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)
J220	Motronic control unit
J338	Throttle valve module
T10	10-pin connector, white, in plenum chamber
T10x	10-pin connector, orange, in plenum chamber
10	Earth point, in plenum chamber
85	Earth connection -1-, in engine compartment wiring harness
A45	Connection (engine speed signal), in dash panel wiring harness
A108	Connection (speed signal), in dash panel wiring harness

Wiring Diagram AUDI A3 2006 - Motronic control unit - accelerator pedal position senders - clutch pedal switch - brake light switch

F	Brake light switch
F36	Clutch pedal switch
G79	Accelerator pedal position sender
G185	Accelerator pedal position sender -2-
J220	Motronic control unit
T10	10-pin connector, white, in plenum chamber
T10e	10-pin connector, black, in plenum chamber
T10g	10-pin connector, blue, in plenum chamber
B135	Connection -1- (15a), in interior wiring harness
B185	Connection -2- (54), in interior wiring harness
*	Only applies to models with manual gearbox

Wiring Diagram AUDI A3 2006 - Motronic control unit - knock sensor I - lambda probe - lambda probe heater - activated charcoal filter system solenoid valve 1

G39	Lambda probe
G61	Knock sensor I
J220	Motronic control unit
N80	Activated charcoal filter system solenoid valve 1 (pulsed)
T2ap	2-pin connector, knock sensor I
T4m	4-pin connector, lambda probe, in engine compartment, right
T6m	6-pin connector, brown, engine compartment, in plenum chamber
T10x	10-pin connector, orange, engine compartment, in plenum chamber
Z19	Lambda probe heater
D80	Positive (+) connection (87a - for activated charcoal filter system solenoid valve), in engine compartment wiring harness
D102	Connection -2-, in engine compartment wiring harness

Wiring Diagram AUDI A3 2006 - Motronic control unit - control and display unit for air conditioner/Climatronic

D	Ignition/starter switch
E87	Control and display unit for air conditioner/Climatronic
J17	Fuel pump relay
J217	Automatic gearbox control unit
J220	Motronic control unit
J226	Starter inhibitor and reversing light relay
J293	Radiator fan control unit
T10	10-pin connector, white, in plenum chamber
T10x	10-pin connector, orange, engine compartment, in plenum chamber
T14a	14-pin connector, air conditioner control unit (radiator fan)
A121	Connection (high bus), in dash panel wiring harness
A122	Connection (low bus), in dash panel wiring harness
B209	Connection (Climatronic sender), in interior wiring harness
B239	Positive (+) connection -1- (50), in interior wiring harness
*	Only models with automatic gearbox
**	Only applies to models with air conditioner
***	Radiator fan control (engine), see applicable Current Flow Diagram: Air conditioner

Wiring Diagram AUDI A3 2006 - Motronic control unit - ignition coils - final output stage

J220	Motronic control unit
N	Ignition coil
N122	Final output stage
N128	Ignition coil 2
P	Spark plug connector
Q	Spark plugs
S237	Fuse in fuse box
T6m	6-pin connector, brown, in plenum chamber
T14	14-pin connector, in engine compartment, left
10	Earth point, in plenum chamber
281	Earth connection -1-, in engine wiring harness
A15	Positive (+) connection (15), in dash panel wiring harness
A98	Positive (+) connection -4- (30), in dash panel wiring harness
B156	Positive (+) connection (30a), in interior wiring harness
D78	Positive (+) connection -1- (30a), in engine compartment wiring harness

Wiring Diagram AUDI A3 2006 - Fuses

D	Ignition/starter switch
S5	Fuse in fuse box/relay plate
S7	Fuse in fuse box/relay plate
S11	Fuse in fuse box/relay plate
S13	Fuse in fuse box/relay plate
S229	Fuse in fuse box
30	Earth point -1-, next to relay plate
277	Earth connection -3-, in interior wiring harness
A2	Positive (+) connection (15), in dash panel wiring harness
A23	Connection (30al), in dash panel wiring harness
B149	Positive (+) connection -2- (15a), in interior wiring harness

Wiring Diagram AUDI A3 2006 - Fuses - fuel gauge sender - fuel pump

G	Fuel gauge sender
G6	Fuel pump (pre-supply pump)
J218	Combi-processor in dash panel insert
K2	Alternator warning lamp
S228	Fuse in fuse box
S232	Fuse in fuse box
S243	Fuse in fuse box
T16	16-pin connector, black, centre console compartment (diagnostic connector)
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
269	Earth connection (sender earth) -1-, in dash panel wiring harness
277	Earth connection -3-, in interior wiring harness
A76	Connection (diagnosis wire K), in dash panel wiring harness
A99	Connection -1- (87), in dash panel wiring harness
A101	Connection -3- (87), in dash panel wiring harness
B147	Positive (+) connection -2- (87), in interior wiring harness
*	If fitted

Wiring Diagram AUDI A3 2006 - Dash panel insert - oil pressure switch - speedometer sender (Hall sender - on gearbox) - oil level/oil temperature sender

F1	Oil pressure switch
G22	Speedometer sender (Hall sender, on gearbox)
G266	Oil level/oil temperature sender
J218	Combi-processor in dash panel insert
J533	Data bus diagnostic interface
K132	Electronic power control fault lamp
K149	Engine electronics warning lamp
T14	14-pin connector, in engine compartment, left
T32	32-pin connector, blue, on dash panel insert
T32a	32-pin connector, green, on dash panel insert
269	Earth connection (sender earth) -1-, in dash panel wiring harness
281	Earth connection -1-, in engine prewiring wiring harness
A80	Connection -1- (X), in dash panel wiring harness
B178	Connection (speed signal), in interior wiring harness