VW POLO 2013 – 1.6 l/74 kW – Motronic (7. 5. 10), engine code BAH (onboard power supply control unit I) . Wiring diagrams, Pin Connector, Location

Wiring Diagram VW POLO 2013 - Battery - starter - alternator - voltage regulator - onboard supply control unit

A	Battery
B	Starter
C	Alternator
C1	Voltage regulator
J519	Onboard supply control unit
S162	Fuse 1 (30) in fuse holder on battery
S180	Fuse 8 (30) in fuse holder on battery
S269	Fuse 11 (30) in fuse holder on battery
T1e	Single pin connector, on starter
T2r	2-pin connector, near dual tone horn
T2s	2-pin connector, on alternator
T6k	6-pin connector, in left engine compartment
T11b	11-pin connector, in left engine compartment
T12a	12-pin connector, in left engine compartment
T18a	18-pin connector, on onboard supply control unit
1	Earth strap, battery - body
507	Screw connection (30), on fuse holder on battery
621	Earth point, on onboard supply battery

Wiring Diagram VW POLO 2013 - Ignition/starter switch - fuel gauge sender - fuel system pressurisation pump - onboard supply control unit

D	Ignition/starter switch
E19	Parking light switch
G	Fuel gauge sender
G6	Fuel system pressurisation pump
J519	Onboard supply control unit
R	Radio
SA10	Fuse 10 on fuse holder A
T4a	4-pin connector, on fuel system pressurisation pump
T8b	8-connector, on radio
T8c	8-connector, on ignition/starter switch
T12d	12-pin connector, on turn signal switch
T18a	18-pin connector, on onboard supply control unit
401	Earth connection (sender earth), in interior wiring harness
B162	Connection (75a), in interior wiring harness
B172	Positive connection 4 (30), in interior wiring harness

Wiring Diagram VW POLO 2013 - Radiator fan thermal switch - oil pressure switch - X-contact relief relay - onboard supply control unit - radiator fan

E1	Light switch
F18	Radiator fan thermal switch
F22	Oil pressure switch
J59	X-contact relief relay
J519	Onboard supply control unit
T1f	Single pin connector, on oil pressure switch
T3s	3-pin connector, on radiator fan
T3t	3-pin connector, on radiator fan thermal switch
T6o	6-pin connector, on X-contact relief relay
T14a	14-pin connector, in left engine compartment
T17a	17-pin connector, on light switch
T18a	18-pin connector, on onboard supply control unit
V7	Radiator fan
12	Earth point, on left in engine compartment
B188	Positive connection 5 (30), in interior wiring harness
B491	Positive connection (75), in interior wiring harness
B493	Connection (75x), in interior wiring harness

Wiring Diagram VW POLO 2013 - 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
J519	Onboard supply control unit
J623	Engine control unit
T2ce	2-pin connector, on coolant temperature sender
T3l	3-pin connector, on engine speed sender
T3m	3-pin connector, on Hall sender
T4t	4-pin connector, on intake air temperature sender
T28a	28-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 POLO 2013 - Accelerator position sender - throttle valve drive for electric throttle (EPC) - throttle valve drive angle sender 1 for electric throttle (EPC) - engine control unit

G79	Accelerator position sender
G185	Accelerator position sender 2
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)
J519	Onboard supply control unit
J623	Engine control unit
T6ad	6-pin connector, on throttle valve drive for electric throttle (EPC)
T6ae	6-pin connector, on accelerator position sender
T11c	11-pin connector, in left engine compartment
T28a	28-pin connector, on engine control unit
T52a	52-pin connector, on engine control unit

Wiring Diagram VW POLO 2013 - Onboard supply control unit - engine control unit - injector - cylinder 1 - injector - cylinder 2 - injector - cylinder 3 - injector - cylinder 4 - ignition transformer - spark plug connector - spark plugs

J519	Onboard supply control unit
J623	Engine control unit
N30	Injector, cylinder 1
N31	Injector, cylinder 2
N32	Injector, cylinder 3
N33	Injector, cylinder 4
N152	Ignition transformer
P	Spark plug connector
Q	Spark plugs
T2bf	2-pin connector, on injector, cylinder 2
T2bg	2-pin connector, on injector, cylinder 3
T2bh	2-pin connector, on injector, cylinder 4
T2cd	2-pin connector, on injector, cylinder 1
T4l	4-pin connector, on ignition transformer
T6b	6-pin connector, in left engine compartment
T14a	14-pin connector, in left engine compartment
T28a	28-pin connector, on engine control unit
T52a	52-pin connector, on engine control unit
331	Earth connection, in injection system wiring harness
E48	Connection (injectors), in injection system wiring harness

Wiring Diagram VW POLO 2013 - Brake fluid level warning contact - lambda probe - knock sensor 1 - onboard supply control unit - engine control unit - activated charcoal filter system solenoid valve 1

F34	Brake fluid level warning contact
G39	Lambda probe
G61	Knock sensor 1
J519	Onboard supply control unit
J623	Engine control unit
N80	Activated charcoal filter system solenoid valve 1
T2ab	2-pin connector, on active charcoal filter system solenoid valve 1
T2bi	2-pin connector, on knock sensor 1
T2u	2-pin connector, on brake fluid level warning contact
T4u	4-pin connector, on lambda probe
T6k	6-pin connector, in left engine compartment
T14a	14-pin connector, in left engine compartment
T28a	28-pin connector, on engine control unit
T52a	52-pin connector, on engine control unit
67	Earth point, on left of front cross member
131	Earth connection 2, in engine compartment wiring harness
E52	Connection (screening), in injection system wiring harness

Wiring Diagram VW POLO 2013 - Onboard supply control unit - engine control unit

J519	Onboard supply control unit
J623	Engine control unit
T6k	6-pin connector, in left engine compartment
T11a	11-pin connector, in left engine compartment
T11b	11-pin connector, in left engine compartment
T11c	11-pin connector, in left engine compartment
T16e	16-pin connector, near relay station, self-diagnosis connection
T52a	52-pin connector, on engine control unit
B131	Connection (54), in interior wiring harness
B159	Connection (diagnosis), in interior wiring harness
B178	Connection (speed signal), in interior wiring harness
B229	Connection (high bus), in interior wiring harness
B230	Connection (low bus), in interior wiring harness
D73	Positive connection (54), in engine compartment wiring harness
D159	Connection (high bus), in engine compartment wiring harness
D160	Connection (low bus), in engine compartment wiring harness

Wiring Diagram VW POLO 2013 - Brake light switch - clutch pedal switch - brake pedal switch - brake light relay - onboard supply control unit - engine control unit

F	Brake light switch
F36	Clutch pedal switch
F47	Brake pedal switch
J111	Brake light relay
J519	Onboard supply control unit
J623	Engine control unit
M21	Left brake and tail light bulb
M22	Right brake and tail light bulb
T4b	4-pin connector, on brake light switch
T4c	4-pin connector, on clutch pedal switch
T6b	6-pin connector, in left engine compartment
T6h	6-pin connector, on left rear fog light
T6j	6-pin connector, on right rear fog light
T6k	6-pin connector, in left engine compartment
T10f	10-pin connector, on brake light relay
T11c	11-pin connector, in left engine compartment
T16b	16-pin connector, on onboard supply control unit
T18a	18-pin connector, on onboard supply control unit
T52a	52-pin connector, on engine control unit
B149	Positive connection 2 (15a), in interior wiring harness
B157	Positive connection 3 (15a), in interior wiring harness
B185	Connection 2 (54), in interior wiring harness
D101	Connection 1, in engine compartment wiring harness

Wiring Diagram VW POLO 2013 - Onboard power supply control unit - fuses

J519	Onboard supply control unit
SA4	Fuse 4 on fuse holder A
SA9	Fuse 9 on fuse holder A
SA14	Fuse 14 on fuse holder A
SA25	Fuse 25 on fuse holder A
SA32	Fuse 32 on fuse holder A
SA37	Fuse 37 on fuse holder A
SA41	Fuse 41 on fuse holder A
T6b	6-pin connector, in left engine compartment
T11a	11-pin connector, in left engine compartment
B146	Positive connection 1 (87), in interior wiring harness
B165	Positive connection 2 (15), in interior wiring harness

Wiring Diagram VW POLO 2013 - Onboard supply control unit - fuel supply relay

E1	Light switch
J519	Onboard supply control unit
J643	Fuel supply relay
SA5	Fuse 5 on fuse holder A
SA45	Fuse 45 on fuse holder A
T10c	10-pin connector, on fuel supply relay
T16b	16-pin connector, on onboard supply control unit
T17a	17-pin connector, on light switch
B163	Positive connection 1 (15), in interior wiring harness
B170	Positive connection 2 (30), in interior wiring harness
B171	Positive connection 3 (30), in interior wiring harness

Wiring Diagram VW POLO 2013 - Speedometer sender - fuel pump relay - onboard supply control unit

G22	Speedometer sender
J17	Fuel pump relay
J519	Onboard supply control unit
T3n	3-pin connector, on speedometer sender
T6f	6-pin connector, on fuel pump relay
T11a	11-pin connector, in left engine compartment
T11b	11-pin connector, in left engine compartment
T14a	14-pin connector, in left engine compartment
T18a	18-pin connector, on onboard supply control unit
238	Earth connection 1, in interior wiring harness
249	Earth connection 2, in interior wiring harness
278	Earth connection 4, in interior wiring harness
606	Earth point, under the centre console near selector lever
B169	Positive connection 1 (30), in interior wiring harness
B492	Positive connection 3 (15), in interior wiring harness

Wiring Diagram VW POLO 2013 - Fuel gauge - onboard supply control unit - onboard supply control unit - dash panel insert - oil pressure warning lamp

G1	Fuel gauge
J285	Control unit in dash panel insert
J519	Onboard supply control unit
K	Dash panel insert
K3	Oil pressure warning lamp
K38	Oil level warning lamp
K43	Coolant temperature warning lamp (too cold)
K61	Handbrake and brake pad wear warning lamp
K83	Exhaust emissions warning lamp
K105	Reserve fuel warning lamp
K132	Electric power control fault lamp
T11a	11-pin connector, in left engine compartment
T32a	32-pin connector, on dash panel insert

VW POLO 2013 Engine control unit (80-pin) J623

–	near battery -arrow-

 

Designation of connector:

A -	Engine control unit -J623-

B/C -

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

–  near battery -arrow-

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Designation of connector:

A -	Engine control unit -J623-

B/C -

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

–  in engine compartment, bottom left -arrow-

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Designation of connector:

A -	Radiator fan control unit -J293-

B -	6-pin connector, on radiator fan control unit -T6ak-

C -	4-pin connector, on radiator fan control unit -T4aa-

–  in engine compartment, left -arrow-

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Designation of connector:

A -	Automatic gearbox control unit -J217-

B -	68-pin connector, on automatic gearbox control unit -T68a-

–  in engine compartment, centre -arrow-

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Designation of connector:

A -	Automatic gearbox control unit -J217-

B/C -

80-pin connector, on automatic gearbox control unit -T80b-

–  behind the door trim, front left -arrow-

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Designation of connector:

A -	Driver door control unit -J386-

B -	6-pin connector, on control unit driver door -T6y-

C -	8-pin connector, on control unit driver door -T8g-

–  behind the door trim, front right -arrow-

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Designation of connector:

A -	Front passenger door control unit -J387-

B -	8-pin connector, on control unit front passenger door -T8i-

–  behind the door trim, rear left -arrow-

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Designation of connector:

A -	Rear left door control unit -J388-

B -	8-pin connector, on door control unit, rear left -T8k-

–  behind the door trim, rear right -arrow-

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Designation of connector:

A -	Rear right door control unit -J389-

B -	8-pin connector, on door control unit, rear left -T8l-

–  in centre dash panel, under radio -arrow-

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Designation of connector:

A -	Heater control unit -J162-

B -	5-pin connector, on heater control unit -Vazio-

C -	16-pin connector, on heater control unit -T16h-

D -	18-pin connector, on heater control unit -Vazio-

–  in centre dash panel, under radio -arrow-

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Designation of connector:

A -	Air conditioning system control unit -J301-

B -	5-pin connector, on air conditioning system control unit -T5l/T5m-

C -	16-pin connector, on heater control unit -T16c-

D -	2-pin connector, on heater control unit -T2bo-

–  in centre dash panel, under radio -arrow-

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Designation of connector:

A -	Climatronic control unit -J255-

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

C -	12-pin connector, on Climatronic control unit -T12j-

D -	16-pin connector, on Climatronic control unit -T16g-

–  near steering column -arrow-

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Designation of connector:

A -	Convenience system central control unit -J393-

B -	12-pin connector, on convenience system central control unit -T12b-

C -	23-pin connector, on convenience system central control unit -T23a-

D -	12-pin connector, on convenience system central control unit -T12c-

–  on steering wheel, left -arrow-

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Designation of connector:

A -	Operating unit in multifunction steering wheel -E221-

B -	6-pin connector, on multifunction steering wheel control unit -T6be-

–  on dash panel, left -arrow-

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Designation of connector:

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

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

1 -	Immobilizer reader coil

2 -	Terminal 56al

3 -	Terminal 56bl

4 -

Vacant

5 -	Speed signal

6 -	Speedometer sender

7 -	Terminal CAN-Bus low

8 -	Terminal CAN-Bus high

9 -	Terminal CAN-Bus high (convenience)

10 -	Terminal CAN-Bus low (convenience)

11 -	Parking light switch

-	Turn signal switch

-	Headlight dipper/flasher switch

-	Intermittent wiper switch

-	Multifunction display call-up button

12 -	Parking light switch

-	Turn signal switch

-	Headlight dipper/flasher switch

-	Intermittent wiper switch

-	Multifunction display call-up button

13 -

Vacant

14 -

Vacant

15 -	Fuel gauge sender

16 -	Coolant shortage indicator sender

17 -	Immobilizer reader coil

18 -	Rear fog light

19 -

Vacant

20 -	Front left belt switch

21 -	Handbrake warning switch

22 -	Oil level warning contact

23 -	Oil pressure switch

24 -	Onboard supply control unit

25 -

Vacant

26 -

Vacant

27 -	Parking light switch

-	Turn signal switch

-	Headlight dipper/flasher switch

-	Intermittent wiper switch

-	Multifunction display call-up button

28 -

Vacant

29 -

Vacant

30 -	Windscreen washer fluid level sender

31 -	Ambient temperature sensor, sensor earth

32 -	Terminal 31

C -	8-pin connector, on control unit with display in dash panel insert -T8a-

1 -	Brake wear indicator

2 -

Vacant

3 -

Vacant

4 -	Terminal 58R, right parking light

5 -	Terminal 15a

6 -	Terminal 58L, left parking light

7 -	Terminal 30a

8 -	Terminal 31

–  under centre console -arrow-

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Designation of connector:

A -	Airbag control unit -J234-

B -	50-pin connector, on airbag control unit -T50a-

–  in engine compartment, right -arrow-

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Designation of connector:

A -	ABS control unit -J104-

B -	38-pin connector, on ABS control unit -T38a-

–  in engine compartment, right -arrow-

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Designation of connector:

A -	ABS control unit -J104-

B -	42-pin connector, on ABS control unit -T42a-

–  behind side trim, in left luggage compartment -arrow-

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Designation of connector:

A -	Parking aid control unit -J446-

B -	12-pin connector, on parking aid control unit -T12f-

C -	16-pin connector, on parking aid control unit -T16a-

–  behind side trim, in right luggage compartment -arrow-

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Designation of connector:

A -	Parking aid control unit -J446-

B -	12-pin connector, on parking aid control unit -T12f-

C -	16-pin connector, on parking aid control unit -T16a-

–  on blower box, centre right, near glove compartment -arrow-

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Designation of connector:

A -	Control and regulating unit for air conditioning system -J127-

B -	6-pin connector, on fresh air blower control unit -T6al-

–  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 -T16d-

–  next to left steering column -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 -T12k-

C -	16-pin connector, on control unit for lighting and wiper functions -T16i-

–  in engine compartment, left -arrow-

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Designation of connector:

A -	Power steering control unit -J500-

B -	3-pin connector, on heated driver seat control unit -Vazio-

C -	2-pin connector, on heated driver seat control unit -T2ct-

D -	4-pin connector, on heated driver seat control unit -T4ai-

–  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 -T6bb-

C -	6-pin connector, on sliding sunroof adjustment regulator -T6bc-

–  on relay plate, behind the 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 -T18c-

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

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Designation of connector:

A -	Onboard supply control unit -J519-

B -	16-pin connector, on onboard supply control unit -T16b-

1 -

Vacant

2 -	Terminal CAN-Bus low

3 -	Terminal CAN-Bus low

4 -

Vacant

5 -	Terminal CAN-Bus high

6 -	Terminal CAN-Bus high

7 -	Intermittent wiper switch

8 -	Intermittent wiper switch

9 -	Fuel supply relay

10 -	Left turn signal switch

11 -	Control unit with display in dash panel insert

12 -	Turn signal switch

13 -	Anti-theft alarm and vermin repellent system contact switch

14 -	Right turn signal

15 -	Terminal 30a

16 -	Left turn signal

C -	6-pin connector, on onboard supply control unit -T6q-

1 -

Vacant

2 -	Rear lid release switch

3 -	Luggage compartment light switch

4 -	Luggage compartment light switch

-	Luggage compartment light

5 -	Rear lid remote release button

6 -	Rear lid release switch

D -	18-pin connector, on onboard supply control unit -T18a-

1 -

Diagnosis

2 -	Terminal 75a

3 -	Rear right central locking lock unit

4 -	Front passenger side central locking lock unit

5 -	Terminal 30

6 -	Driver door open switch

7 -

Vacant

8 -	Terminal 31

9 -	Alternator

-	Voltage regulator

10 -

Vacant

11 -	terminal X

12 -	Terminal 15

13 -	Rear left central locking lock unit

14 -	Ignition/starter switch

15 -	Terminal 53c

16 -	Windscreen wiper motor

17 -	Horn activation contact ring

18 -	Wiper switch

E -	6-pin connector, on onboard supply control unit -Vazio-

F -	18-pin connector, on onboard supply control unit -T18b-

1 -	Terminal 31 (Export models only)

-	vacant (Brazil models only)

2 -

Vacant

3 -

Vacant

4 -

Vacant

5 -

Vacant

6 -

Vacant

7 -	Rain sensor

8 -	Rain sensor

9 -	Terminal CAN-Bus low (convenience)

10 -

Vacant

11 -	Rain sensor

12 -	Terminal CAN-Bus high (convenience)

13 -	Terminal 31 (Export models only)

-	vacant (Brazil models only)

14 -

Vacant

15 -

Vacant

16 -

Vacant

17 -	Starter motor relay

18 -

Vacant

G -	6-pin connector, on onboard supply control unit -T6c-

1 -

Vacant

2 -	Terminal 58d

3 -	Hazard warning light switch illumination

4 -	Heated rear window switch

5 -	Heated rear window switch illumination bulb

6 -	Hazard warning lights button

H -	5-pin connector, on onboard supply control unit -T5f-

1 -	Terminal 31

2 -	Horn or dual tone horn

3 -	Terminal 30a

4 -	Heated rear window

5 -	Terminal 30a

I -	5-pin connector, on onboard supply control unit -T5d-

1 -	Interior lights

2 -	Terminal 31a

3 -	Terminal 30a

4 -	Windscreen wiper motor

5 -	Windscreen wiper motor

J -	6-pin connector, on onboard supply control unit -T6t-

1 -	Mirror adjustment change-over switch

-	Mirror adjustment switch

2 -	Driver side heated exterior mirror

3 -

Vacant

4 -	Front passenger side heated exterior mirror

5 -

Vacant

6 -	Terminal 30a

K -	6-pin connector, on onboard supply control unit -T6m-

1 -	Terminal 30a

2 -

Vacant

3 -

Vacant

4 -	Terminal 30a

5 -

Vacant

6 -	Terminal 30

L -	6-pin connector, on onboard supply control unit -T6u-

1 -	Terminal 15a

2 -	Reversing light

3 -

Vacant

4 -

Vacant

5 -	Rear lid release motor

6 -	Terminal 30a

–  near interior lighting -arrow-

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Designation of connector:

A -	Mirror memory control unit -J347-

B -	8-pin connector, on mirror memory control unit -T8d-