A4010a Junction box, electronics

Plug connector overview

Number	X-pin, colour	Description
X14270	47-pin, black	Component connector Junction box
X14271	54-pin, blue	Component connector Junction box
X14272	54-pin, black	Component connector Junction box

Pin assignments at plug connector X14270

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Signal, refrigerant control valve	Control valve, refrigerant compressor

2	A	Signal, water valve	Water valves

3		Not used

4	A	Signal, open glove compartment	Unlock drive unit, glove compartment

5	A	Signal, ECO valve	ECO valve

6	A	Signal, ECO valve	ECO valve

7	A	Signal, refrigerant control valve	Control valve, refrigerant compressor

8		Not used

9		Not used

10		Not used

11		Not used

12	A	Signal, automatic soft close drive, boot lid/tailgate	Relay, automatic soft-close

13		Not used

14	A	Signal, central arrest motor	System lock, driver's door

15	A	Signal, central arrest motor	System lock, passenger's door

16	A	Signal, ZV drive, fuel filler flap	Central locking drive, fuel filler flap

17	A	Signal, lock motor	System lock, passenger's door

18	A	Unlock motor signal	System lock, driver's door

19	A	Unlock motor signal	System lock, passenger's door

20	A	Signal, ZV drive, fuel filler flap	Central locking drive, fuel filler flap

21	A	Activation Windscreen washer pump	Windscreen washer pump

22	A	Activation Rear window washer pump	Rear window washer pump

23	M	Ground	Ground point

24	A	Open window signal	Power window motor, rear driver's side

25	A	Close window signal	Power window motor, rear driver's side

26	A	Open window signal	Power window motor, rear passenger's side

27	A	Close window signal	Power window motor, rear passenger's side

28	A	Signal, water jet heating	Heated water jet, left

29		Voltage supply, outside mirror heating	Outside mirror, driver's side

30		Not used

31	A	Signal, water jet heating	Heated water jet, right

32		Voltage supply, outside mirror heating	Outside mirror, passenger's side

33	A	Signal, water valve	Water valves

34	A	Signal, seat heating	Driver's seat heating module

35	A	Signal, load cutout	Rear power distribution box

36	A	Signal, lock motor	System lock, driver's door

37	A	Signal, auxiliary water pump	Auxiliary water pump

38	A	Signal, seat heating	Passenger's seat heating module

39	A	Unlock motor signal	Central locking drive, boot lid

40	A	Signal, load cutout	Rear power distribution box

41		Not used

42	A	Signal, central arrest motor	System lock, rear driver's side

43	A	Signal, central arrest motor	System lock, rear passenger's side

44	A	Signal, lock motor	System lock, rear driver's side

45	A	Signal, lock motor	System lock, rear passenger's side

46	A	Unlock motor signal	System lock, rear driver's side

47	A	Unlock motor signal	System lock, rear passenger's side

Pin assignments at plug connector X14271

Pin	Type	Description / Signal type	Connection / Measuring notes
1		Signal PT-CAN high	CAN-bus connector

2		Signal PT-CAN low	CAN-bus connector

3		Not used

4		Not used

5		Not used

6		Not used

7	E	Signal Fuel level sensor, left tank half	Fuel level sensor, left tank half

8	M	Ground Rear compartment mixing flap potentiometer	Rear compartment mixing flap potentiometer

9	E	Signal Fuel level sensor, right tank half	Electric fuel pump

10	A/E	CAN bus low	CAN-bus connector

11	E	Signal Automatic soft-close drive, boot lid/tailgate	Automatic soft-close drive, boot lid/tailgate

12	A	Supply Rear compartment mixing flap potentiometer	Rear compartment mixing flap potentiometer

13		Not used

14	E	Signal, power window switch	Power window switch, rear passenger's side

15	E	Signal, power window switch	Power window switch, rear driver's side

16	E	Signal, AUC sensor	AUC sensor

17	A/E	Signal, diagnosis CAN-High	OBDII socket

18	E	Signal, seat backrest lock, 2nd Row of seats	Rear bench seat switch, right

19		Not used

20	E	Signal, electric auxiliary heater	Digital diesel electronics control unit

21		Not used

22		Not used

23		Not used

24	E	Signal Rear compartment mixing flap potentiometer	Rear compartment mixing flap potentiometer

25	E	Signal, power window Hall sensor	Power window motor, rear passenger's side

26	M	Ground Coolant pressure sensor	Coolant pressure sensor

27	E	Signal, power window Hall sensor	Power window motor, rear driver's side

28	E	Signal, power window switch	Power window switch, passenger's door

29	E	Signal, power window Hall sensor	Power window motor, rear driver's side

30	A	Supply Coolant pressure sensor	Coolant pressure sensor

31	E	Signal, washer fluid level	Washer fluid level switch

32	E	Signal Glove compartment button	Glove compartment button

33	A/E	Signal, diagnosis CAN-Low	OBDII socket

34	E	Signal Fuel level sensor, left tank half	Fuel level sensor, left tank half

35	A	Return contact, wiper rest position	Wiper motor

36	A	Return contact, wiper rest position	Wiper drive, rear

37		Not used

38		Not used

39		Not used

40		Not used

41		Not used

42		Not used

43		Not used

44	E	Signal Boot lid button	Boot lid button

45	A	Wake-up signal, terminal 15	Connector , terminal 15 wake-up signal

46	A/E	CAN bus high	CAN-bus connector

47	E	Signal, power window Hall sensor	Power window motor, rear driver's side

48	E	Signal, power window Hall sensor	Power window motor, rear passenger's side

49	E	Signal, power window Hall sensor	Power window motor, rear passenger's side

50	E	Signal Central locking drive, boot lid	Central locking drive, boot lid

51	E	Signal Coolant pressure sensor	Coolant pressure sensor

52	E	Signal Fuel level sensor, right tank half	Electric fuel pump

53	E	Supply Junction box, electronics	Fuse F124

54	E	Signal, coolant level	Coolant level switch

Pin assignments at plug connector X14272

Pin	Type	Description / Signal type	Connection / Measuring notes
1		Not used

2	E	Signal, fanfare horn	Steering column switch cluster

3		Not used

4		Not used

5		Not used

6		Not used

7		Not used

8	M	Ground Hazard warning switch	Hazard warning switch

9		Not used

10	A/E	CAN bus high	Heating/air conditioning system

11	A/E	CAN bus high	CAN-bus connector

12	A/E	CAN bus low	Heating/air conditioning system

13		Not used

14		Not used

15		Not used

16		Not used

17		Not used

18		Not used

19		Not used

20		Not used

21		Not used

22		Not used

23		Not used

24		Not used

25		Not used

26	M	Ground	Ground point

27		Not used

28		Not used

29	A/E	CAN bus high	Electrochromic interior rear view mirror with high beam assistant

30	A/E	CAN bus low	CAN-bus connector

31	A/E	CAN bus low	Electrochromic interior rear view mirror with high beam assistant

32		Not used

33		Not used

34		Not used

35		Not used

36		Not used

37		Not used

38		Not used

39		Not used

40		Not used

41		Not used

42		Not used

43		Not used

44		Not used

45		Not used

46		Not used

47	A/E	left-hand drive CAN bus high	Function control centre, roof

47	A/E	right-hand drive CAN bus high	Crash safety module

48	A/E	right-hand drive CAN bus low	Crash safety module

48	A/E	left-hand drive CAN bus low	Function control centre, roof

49		Not used

50	A	Wake-up signal, terminal 15	Steering column switch cluster

51		Not used

52		Not used

53		Not used

54		Not used