VW GOLF 2012 — 1.6 l/74 kW Motronic (07.05.10), engine code BAH . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW GOLF 2012 - Battery - starter - alternator - voltage regulator

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
S163	Fuse 2 (30) in fuse holder on battery
S176	Fuse 4 (30) in fuse holder on battery
S177	Fuse 5 (30) in fuse holder on battery
T1a	Single pin connector, on the battery
T2o	2-pin connector, on alternator
T4w	4-pin connector, near starter
1	Earth strap, battery - body
2	Earth strap, gearbox - body
500	Screw connection 1 (30), on relay plate
502	Screw connection 1 (30a), on relay plate
507	Screw connection (30), on fuse holder on battery

Wiring Diagram VW GOLF 2012 - Ignition/starter switch - X-contact relief relay

D	Ignition/starter switch
J59	X-contact relief relay
SA10	Fuse 10 on fuse holder A
SA12	Fuse 12 on fuse holder A
SA13	Fuse 13 on fuse holder A
T8c	8-pin connector, on ignition/starter switch
T16a	16-pin connector, diagnostic
501	Screw connection 2 (30), on relay plate
503	Screw connection (75x), on relay plate
B272	Positive connection (30), in main wiring harness
B299	Positive connection 3 (30), in main wiring harness
B474	Connection 10 in main wiring harness

Wiring Diagram VW GOLF 2012 - Engine speed sender - Hall sender - intake air temperature sender - coolant temperature sender - intake manifold pressure sender - engine control unit

G28	Engine speed sender
G40	Hall sender
G42	Intake air temperature sender
G62	Coolant temperature sender
G71	Intake manifold pressure sender
J623	Engine control unit
T2eg	2-pin connector, on coolant temperature sender
T3a	3-pin connector, on engine speed sender
T3c	3-pin connector, on Hall sender
T4b	4-pin connector, on coolant temperature sender
T80a	80-pin connector, on engine control unit
220	Earth connection (sender earth), in engine wiring harness
E46	Positive connection 1 (5 Volt), in injection system wiring harness

Wiring Diagram VW GOLF 2012 - Throttle valve drive for electric throttle (EPC) - throttle valve drive angle sender 1 for electric throttle (EPC) - engine control unit - ignition transformer - spark plug connector - spark plugs

G186	Throttle valve drive for electric throttle (EPC)
G187	Throttle valve drive angle sender 1 for electric throttle (EPC)
G188	Throttle valve drive angle sender 2 for electric throttle (EPC)
J623	Engine control unit
N152	Ignition transformer
P	Spark plug connector
Q	Spark plugs
T4c	4-pin connector, on ignition transformer
T6a	6-pin connector, on throttle valve drive for electric throttle (EPC)
T14a	14-pin connector, in left engine compartment
T80a	80-pin connector, on engine control unit
331	Earth connection, in injection system wiring harness
608	Earth point, in centre of plenum chamber

Wiring Diagram VW GOLF 2012 - Accelerator position sender - accelerator position sender 2 - engine control unit

G79	Accelerator position sender
G185	Accelerator position sender 2
J255	Climatronic control unit
J293	Radiator fan control unit
J623	Engine control unit
T6ah	6-pin connector, on accelerator position sender
T12b	12-pin connector, on Climatronic control unit
T14b	14-pin connector, on radiator fan control unit
T16d	16-pin connector, on Climatronic control unit
T17a	17-pin connector, behind centre dash panel
T80a	80-pin connector, on engine control unit
366	Earth connection 1, in main wiring harness
608	Earth point, in centre of plenum chamber
B466	Connection 2 in main wiring harness
B467	Connection 3 in main wiring harness
B697	Connection 2 (air conditioning system), in main wiring harness
*	for models without Climatronic

Wiring Diagram VW GOLF 2012 - Knock sensor 1 - engine control unit - injector - cylinder 1 - injector - cylinder 2 - injector - cylinder 3 - injector - cylinder 4 - activated charcoal filter system solenoid valve 1

G61	Knock sensor 1
J623	Engine 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
SA43	Fuse 43 on fuse holder A
T2c	2-pin connector, on injector, cylinder 1
T2d	2-pin connector, on injector, cylinder 2
T2e	2-pin connector, on injector, cylinder 3
T2f	2-pin connector, on injector, cylinder 4
T2g	2-pin connector, on knock sensor 1
T2ea	2-pin connector, on active charcoal filter system solenoid valve 1
T14a	14-pin connector, in left engine compartment
T80a	80-pin connector, on engine control unit
323	Earth connection (knock sensor), in injection system wiring harness
B350	Positive connection 1 (87a), in main wiring harness
B465	Connection 1 in main wiring harness
E48	Connection (injectors), in injection system wiring harness

Wiring Diagram VW GOLF 2012 - Lambda probe - engine control unit

G39	Lambda probe
J255	Climatronic control unit
J293	Radiator fan control unit
J623	Engine control unit
T4at	4-pin connector, on Lambda probe
T12e	12-pin connector, behind centre dash panel
T14b	14-pin connector, on radiator fan control unit
T14d	14-pin connector, on Climatronic control unit
T80a	80-pin connector, on engine control unit
B383	Connection 1 (drive train CAN bus, high), in main wiring harness
B390	Connection 1 (drive train CAN bus, low), in main wiring harness
B464	Connection (speed signal), in main wiring harness
B696	Connection 1 (air conditioning system), in main wiring harness

Wiring Diagram VW GOLF 2012 - Brake light switch - clutch pedal switch - brake pedal switch - speedometer sender - engine control unit

F	Brake light switch
F36	Clutch pedal switch
F47	Brake pedal switch
G22	Speedometer sender
J623	Engine control unit
T3b	3-pin connector, on speedometer sender
T4av	4-pin connector, on brake light switch
T4ba	4-pin connector, on clutch pedal switch
T14a	14-pin connector, in left engine compartment
T16a	16-pin connector, diagnostic
T80a	80-pin connector, on engine control unit
369	Earth connection 4, in main wiring harness
370	Earth connection 5, in main wiring harness
B335	Connection 1 (54), in main wiring harness
B336	Connection 2 (54), in main wiring harness

Wiring Diagram VW GOLF 2012 - Ambient temperature sensor - coolant shortage indicator sender

G17	Ambient temperature sensor
G32	Coolant shortage indicator sender
SA28	Fuse 28 on fuse holder A
SA29	Fuse 29 on fuse holder A
SA32	Fuse 32 on fuse holder A
T2j	2-pin connector, on coolant shortage indicator sender
T2q	2-pin connector, on ambient temperature sensor
410	Earth connection 1 (sender earth), in main wiring harness
B275	Positive connection (87), in main wiring harness
B277	Positive connection 1 (15a), in main wiring harness
*	for models without Climatronic

Wiring Diagram VW GOLF 2012 - Fuses

J255	Climatronic control unit
J293	Radiator fan control unit
SA5	Fuse 5 on fuse holder A
SA7	Fuse 7 on fuse holder A
SA11	Fuse 11 on fuse holder A
T14a	14-pin connector, in left engine compartment
T14b	14-pin connector, on radiator fan control unit
T16a	16-pin connector, diagnostic
T16b	16-pin connector, on Climatronic control unit
T17a	17-pin connector, behind centre dash panel
B273	Positive connection (15), in main wiring harness
B278	Positive connection 2 (15a), in main wiring harness
B279	Positive connection 3 (15a), in main wiring harness
B280	Positive connection 4 (15a), in main wiring harness

Wiring Diagram VW GOLF 2012 - Fuel gauge sender - fuel system pressurisation pump - fuel pump relay - control unit with display in dash panel insert - dash panel insert

G	Fuel gauge sender
G6	Fuel system pressurisation pump
J17	Fuel pump relay
J285	Control unit with display in dash panel insert
K	Dash panel insert
T4e	4-pin connector, on fuel system pressurisation pump
T32a	32-pin connector, on control unit with display in dash panel insert
504	Screw connection 1 (87), on relay plate
B473	Connection 9 in main wiring harness

Wiring Diagram VW GOLF 2012 - Oil pressure switch - fuel gauge - coolant temperature gauge - rev. counter - speedometer - alternator warning lamp - oil pressure warning lamp

F22	Oil pressure switch
G1	Fuel gauge
G3	Coolant temperature gauge
G5	Rev. counter
G21	Speedometer
J285	Control unit with display in dash panel insert
K	Dash panel insert
K2	Alternator warning lamp
K3	Oil pressure warning lamp
K105	Reserve fuel warning lamp
T1b	Single pin connector, on oil pressure switch
T14a	14-pin connector, in left engine compartment
T32a	32-pin connector, on control unit with display in dash panel insert
T32b	32-pin connector, on control unit with display in dash panel insert

VW GOLF 2012

Earth strap, battery - body - Arrow A -

VW GOLF 2012 Earth points in the engine compartment

Earth points in the engine compartment

1	Earth strap, battery - body

q	Location: → Reference

2	Earth strap, gearbox - body

q	Location: → Reference

12	Earth point, on left in engine compartment

q	Location: → Reference

15	Earth point, on cylinder head

q	Location: → Reference

608	Earth point, in centre of plenum chamber

q	Location: → Reference

609	Earth point, on right in plenum chamber

q	Location: → Reference

671	Earth point 1, on front of left longitudinal member

q	Location: → Reference

1 Earth strap, battery - body - Arrow A -    12 earth connection in engine compartment, left -arrow C-    671 Earth point 1 at front of left longitudinal member -arrow B-

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2 Earth strap, gearbox - body- Arrow -

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15 Earth connection on cylinder head - arrow -

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608 Earth point on water deflector, centre- Arrow -

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609 Earth point on water deflector, centre - arrow -

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Earth points in passenger compartment

29	Earth point, near steering column

q	Location: → Reference

42	Earth point, next to steering column

q	Location: → Reference

43	Earth point, lower part of right A-pillar

q	Location: → Reference

44	Earth point, lower part of left A-pillar

q	Location: → Reference

605	Earth point, on top end of steering column

q	Location: → Reference

29 Earth connection near steering column -arrow-

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42 Earth point, next to steering column- arrow -

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43 Earth point, lower part of right A-pillar- Arrow -

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44 Earth point, lower part of left A-pillar -arrow-

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605 Earth point, on top end of steering column - Arrow -

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Earth points in rear part of vehicle

50	Earth points, in luggage compartment, left

q	Location: → Reference

50 Earth points in luggage compartment, left - Arrow -

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VW GOLF 2012 Relay plate, behind left dash panel

Relay plate, behind left dash panel

Relay description:

1 -

vacant

q

Colour: -

2 -	Cold start device relay -J41-

q	Colour: Black 1)

3 -	Starter inhibitor relay -J207-

q	Colour: grey

4 -	Fog light relay -J5-

q	Colour: grey

5 -	Multifunction steering wheel control unit -J453-

q	Colour: black

6 -	Multifunction steering wheel control unit -J453-

q	Colour: black

7 -	Mirror memory control unit -J267-

q	Colour: black

8 -	Mirror memory control unit -J267-

q	Colour: black

9 -

vacant

q

Colour: -

10 -	Secondary air pump relay -J299-

q	Colour: Black 2)

11 -	Starter inhibitor and reversing light relay -J226-

q	Colour: Grey 3)

q

11 -	Starter inhibitor relay 2 -J864-

q	Colour: Grey 4)

12 -	Terminal 30 voltage supply relay -J317-

q	Colour: Grey 5)

13 -	Ignition cut-off delay relay -J64-

q	Colour: Grey 6)

13 -	Electric drive main relay -J437-

q	Colour: Grey 7)

Note t  1) For vehicles with TotalFlex engines only t  2) For vehicles with 1.8l or 2.0l petrol engines only t  3) For vehicles with automatic 4-speed or 5-speed transmissions only t  4) For vehicles with automatic 6-speed transmissions only t  5) For vehicles with Diesel engines only t  6) For vehicles with 1.8l engines only t  7) For vehicles with 2.0l engines only

Relay on additional support under relay plate

Relay description:

1 -	Dual tone horn relay -J4-

q	Colour: grey

2 -	X-contact relief relay -J59-

q	Colour: black

3 -

vacant

q

Colour: -

4 -	Glow plug relay -J52-

q	Colour: Black 1)

4 -	Fuel pump relay -J17-

q	Colour: Black 2)

q	For vehicles with TotalFlex or petrol engines only

V -	Automatic intermittent wash and wipe relay -J31-

q	Colour: black

VI -	Automatic intermittent wash and wipe relay -J31-

q	Colour: black

Note t  1) For vehicles with Diesel engines only t  2) For vehicles with TotalFlex or petrol engines only

VW GOLF 2012 Engine control unit (80-pin) J623

Engine control unit (80-pin) -J623-

   

Location: –  Central under plenum chamber cover -Arrow-

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Designation of connector:

A -	Engine control unit -J623-

B/C -

80-pin connector, on engine control unit -T80a-

Engine control unit (121-pin) -J623-

Location: –  Central under plenum chamber cover -Arrow-

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Designation of connector:

A -	Engine control unit -J623-

B/C -

121-pin connector, on engine control unit -T121a-

Radiator fan control unit -J293-

Location: –  in engine compartment, bottom left -arrow-

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Designation of connector:

A -	Radiator fan control unit -J293-

B -	4-pin connector, on radiator fan control unit -T4ag-

C -	14-pin connector, on radiator fan control unit -T14b-

Automatic transmission control unit (6-speed transmission) -J217-

Location: –  in engine compartment, right -arrow-

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Designation of connector:

A -	Automatic gearbox control unit -J217-

B -	52-pin connector, on automatic transmission control unit -T52a-

Automatic transmission control unit (4-speed or 5-speed transmission) -J217-

Location: –  in engine compartment, right -arrow-

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Designation of connector:

A -	Automatic gearbox control unit -J217-

B -	68-pin connector, on automatic transmission control unit -T68b-

Driver door control unit -J386-

Location: –  behind the door trim, front left -arrow-

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Designation of connector:

A -	Driver door control unit -J386-

B -	29-pin connector, on driver door control unit -T29a-

Front passenger door control unit -J387-

Location: –  behind the door trim, front right -arrow-

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Designation of connector:

A -	Front passenger door control unit -J387-

B -	29-pin connector, on front passenger door control unit -T29b-

Rear left door control unit -J388-

Location: –  behind the door trim, rear left -arrow-

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Designation of connector:

A -	Rear left door control unit -J388-

B -	18-pin connector, on left rear door control unit -T18c-

Rear right door control unit -J389-

Location: –  behind the door trim, rear right -arrow-

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Designation of connector:

A -	Rear right door control unit -J389-

B -	18-pin connector, on left rear door control unit -T18d-

Climatronic control unit -J255-

Location: –  In centre console, under radio -arrow-

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Designation of connector:

E -	Climatronic control unit -J255-

A -	12-pin connector, on Climatronic control unit -T12b-

B -	20-pin connector, on Climatronic control unit -T20a-

C -	16-pin connector, on Climatronic control unit -T16d-

D -	16-pin connector, on Climatronic control unit -T16b-

Convenience system central control unit -J393-

Location: –  Above relay plate-arrow-

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Designation of connector:

A -	Convenience system central control unit -J393-

B -	15-pin connector, on convenience system central control unit -T15a-

C -	23-pin connector, on convenience system central control unit -T23b-

Multifunction steering wheel control unit -J453-

Location: –  on relay plate, dash panel, left -arrow-

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Designation of connector:

A -	Multifunction steering wheel control unit -J453-

B -	18-pin connector, on multi-function steering wheel control unit -T18b-

Control unit with display in dash panel insert -J285-

Location: –  on dash panel, left -arrow-

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Designation of connector:

A -	Control unit with display in dash panel insert -J285-

C -	32-pin connector, on control unit with display in dash panel insert -T32a-

1 -	Terminal 15a

2 -	Right turn signal

3 -	Speed signal

4 -	Turn signal relay

5 -	Fuel gauge sender

6 -	Terminal 31

7 -	Terminal 31, sensor earth

8 -	Coolant temperature indicator sensor

q	up to June 2007

9 -	Terminal 31

10 -	Oil pressure switch

11 -

vacant

12 -	Alternator

-	Voltage regulator

13 -

vacant

14 -	Rear fog light bulb

15 -

vacant

16 -	Rear lid release switch

17 -	Terminal 56a - high beam -

18 -	Left turn signal

19 -

vacant

20 -	Terminal 58b - tail lights -

21 -	Door contact switch

q	up to December 2007

22 -	Coolant shortage indicator sender

23 -	Terminal 30a

24 -	Terminal 31

25 -	Terminal K/W - engine diagnosis -

26 -	Terminal 58r - right parking light -

27 -	Terminal 58l - left parking light -

28 -	Speedometer sender

29 -	Brake fluid level warning contact

30 -	Terminal 86s

31 -	Front left belt switch

q	up to August 2009

32 -

vacant

B -	32-pin connector, on control unit with display in dash panel insert -T32b-

1 -

vacant

2 -	Immobilizer reader coil

3 -

vacant

4 -

vacant

5 -	Terminal K/W - engine diagnosis -

6 -	Windscreen washer fluid level sender

q	up to September 2007

7 -	Brake wear indicator

8 -	Terminal for CAN-Bus "high" - convenience -

9 -	Terminal for CAN-Bus "low" - convenience -

10 -

vacant

11 -

vacant

12 -	Radiator fan control unit

13 -	Handbrake warning switch

14 -

vacant

15 -

vacant

16 -

vacant

17 -	Immobilizer reader coil

18 -

vacant

19 -	Terminal for CAN-Bus high

20 -	Terminal for CAN-Bus low

21 -

vacant

22 -	Contact switch on bonnet / bonnet for alarm system

q	up to June 2007

23 -	Intermittent wiper regulator

24 -	Intermittent wiper regulator

25 -	Intermittent wiper regulator

26 -	Ambient temperature sensor

27 -	Terminal for CAN-Bus high

28 -	Terminal for CAN-Bus low

29 -

vacant

30 -

vacant

31 -

vacant

32 -

vacant

Airbag control unit -J234-

Location: –  under centre console -arrow-

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Designation of connector:

A -	Airbag control unit -J234-

B -	75-pin connector, on airbag control unit -T75a-

ABS control unit -J104-

Location: –  In engine compartment, left -arrow-

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Designation of connector:

A -	ABS control unit -J104-

B -	47-pin connector, on ABS control unit -T47a-

Parking aid control unit -J446-

Location: –  Behind right luggage compartment lining-arrow-

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Designation of connector:

A -	Parking aid control unit -J446-

B -	16-pin connector, on parking aid control unit -T16e-

C -	12-pin connector, on parking aid control unit -T12d-

Fresh air blower control unit -J126-

Location: –  Behind dashboard, right side, near glove compartment -arrow-

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Designation of connector:

A -	Fresh air blower control unit -J126-

B -	3-pin connector, on fresh air blower control unit -T3ad-

Control unit for interactive system -J879-

Location: –  behind the glove compartment -arrow-

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Designation of connector:

A -	Control unit for interactive system -J879-

B -	16-pin connector, on control unit for interactive system -T16f-

Control unit for lighting and wiper functions -J917-

Location: –  Above glove compartment -arrow-

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Designation of connector:

A -	Control unit for lighting and wiper functions -J917-

B -	12-pin connector, on control unit for lighting and wiper functions -T12h-

C -	16-pin connector, on control unit for lighting and wiper functions -T16g-

Heated driver seat control unit -J131-

Location: –  At centre of dashboard -arrow-

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Designation of connector:

A -	Heated driver seat control unit -J131-

B -	6-pin connector, on heated driver seat control unit -T6p-

Heated front passenger seat control unit -J132-

Location: –  At centre of dashboard -arrow-

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Designation of connector:

A -	Heated front passenger seat control unit -J132-

B -	6-pin connector, on heated front passenger seat control unit -T6q-

Sliding sunroof adjustment control unit -J245-

Location: –  near interior mirror, on roof-arrow-

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Designation of connector:

A -	Sliding sunroof adjustment control unit -J245-

B -	6-pin connector, on sliding sunroof adjustment control unit -T6m-

C -	6-pin connector, on control for sliding sunroof adjustment -T6v-

Mirror memory control unit -J267-

Location: –  on relay plate, dash panel, left -arrow-

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Designation of connector:

A -	Mirror memory control unit -J267-

B -	18-pin connector, on mirror memory control unit -T18e-