A2249 Digital diesel electronics control unit

Connector location views

Number	X-pin, colour	Description
X2411	9-pin, black	Plug connector Digital diesel electronics control unit Module 1
X2412	24-pin, black	Plug connector Digital diesel electronics control unit Module 2
X2413	52-pin, black	Plug connector Digital diesel electronics control unit Module 3
X2414	40-pin, black	Plug connector Digital diesel electronics control unit Module 4
X2415	9-pin, black	Plug connector Digital diesel electronics control unit Module 5

Pin assignments at plug connector X2411

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Voltage supply Terminal 15	Fuse carrier, engine electronics

2		Not used

3	E/A	Diagnostic link TXD	Transmission control unit

4	M	Signal, lock front passenger's door	Ground connector

5	M	Signal, lock front passenger's door	Ground connector

6	M	Signal, lock front passenger's door	Ground connector

7	A	Terminal 15	Transmission control unit

8	E	Voltage supply Terminal 15	Fuse carrier, engine electronics

9	E	Activation, main relay	DDE relay

Pin assignments at plug connector X2412

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

2		Not used

3	E/A	CAN bus low	Transmission control unit

4	E/A	CAN bus high	Transmission control unit

5		Not used

6		Not used

7		Not used

8	A	Activation, engine mount	Electrical changeover valve, engine mount

9	A	Supply Presupply pressure sensor	Presupply pressure sensor

10	M	Ground Presupply pressure sensor	Presupply pressure sensor

11		Not used

12		Not used

13		Not used

14		Not used

15		Not used

16		Not used

17	E	Signal Presupply pressure sensor	Presupply pressure sensor

18		Not used

19		Not used

20		Not used

21		Not used

22		Not used

23		Not used

24		Not used

Pin assignments at plug connector X2413

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Supply Air mass sensor	Air mass sensor

2	E	Signal Air mass sensor	Air mass sensor

3	M	Ground Air mass sensor	Air mass sensor

4	E	Signal Hall-effect sensor, camshaft 1	Hall-effect sensor, camshaft 1

5		Not used

6	E	Signal Speed (rpm) sensor	Speed (rpm) sensor

7		Not used

8		Not used

9		Not used

10	E	Signal Solenoid valve, exhaust gas recirculation	Solenoid valve, exhaust gas recirculation

11		Not used

12	E	Signal Preheater relay	Preheater relay

13		Not used

14	A	Supply Boost pressure sensor	Boost pressure sensor

15	E	Signal Boost pressure sensor	Boost pressure sensor

16	M	Ground Boost pressure sensor	Boost pressure sensor

17	M	Ground Hall-effect sensor, camshaft 1	Hall-effect sensor, camshaft 1

18		Not used

19	M	Shield, speed (rpm) sensor	Speed (rpm) sensor

20	M	Ground Rail pressure sensor	Rail pressure sensor

21		Not used

22		Not used

23	A	Supply Solenoid valve, supercharger control	Solenoid valve, supercharger control

24	E	Alternator load signal	Alternator

25	A	Signal Electric changeover valve, swirl flaps	Electric changeover valve, swirl flaps

26		Not used

27		Not used

28	E	Signal Coolant temperature sensor	Coolant temperature sensor

29	E	Signal Intake air temperature	Air mass sensor

30		Not used

31	M	Ground Speed (rpm) sensor	Speed (rpm) sensor

32	M	Ground Coolant temperature sensor	Coolant temperature sensor

33	E	Signal Rail pressure sensor	Rail pressure sensor

34		Not used

35	A	Supply Rail pressure sensor	Rail pressure sensor

36		Not used

37		Not used

38	A	Supply Rail pressure control valve	Rail pressure control valve

39		Not used

40	E	Signal Oil level sensor	Oil level sensor

41	E	Signal Oil pressure switch	Oil pressure switch

42		Not used

43		Not used

44		Not used

45		Not used

46		Not used

47		Not used

48		Not used

49		Not used

50	E	Signal Battery charge indicator lamp	Alternator

51	E	Voltage signal, terminal 30h	Starter

52	E	Signal Preheater relay	Preheater relay

Pin assignments at plug connector X2414

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Battery charge indicator lamp signal (terminal 61)	Instrument cluster control unit

2	A	Voltage signal, terminal 30h	Instrument cluster control unit

3		Not used

4	E	Signal Electric fan	Electric fan

5		Not used

6		Not used

7	M	Ground Pedal position sensor	Pedal position sensor

8	E	Signal Pedal position sensor	Pedal position sensor

9	A	Supply Pedal position sensor	Pedal position sensor

10	E	Signal Fuel pump relay 1	Fuel pump relay 1

11	A	Signal Oil pressure indicator lamp	Instrument cluster control unit

12	M	Ground Pedal position sensor	Pedal position sensor

13	E	Signal Pedal position sensor	Pedal position sensor

14	A	Supply Pedal position sensor	Pedal position sensor

15		Not used

16		Not used

17	A	Engine speed signal output (TD)	Diagnostic connector

18		Not used

19		Not used

20	A	Activation Auxiliary heater	Auxiliary heater

21	A	Signal Oil level sensor	Light switching centre control unit

22	E	Rear right speed signal	ABS/ASC unit ABS/DSC unit

23	E	Signal Clutch switch	Clutch switch

24	E	Signal Brake light switch	Brake light switch

25		Not used

26	A	Voltage supply Terminal 15	Fuse F29

27	E	Data link MFL	Volute spring

28	E	Brake light test signal	Brake light switch

29	E	A/C compressor signal	Relay, A/C compressor

30		Not used

31	E	Signal Auxiliary heater	Heating and A/C control module

32	E/A	Signal Diagnostic link TXD	Diagnostic connector

33	E/A	Communication line (EWS)	Electronic immobiliser control unit

34		Not used

35		Not used

36	E/A	CAN bus high	Connector, CAN bus

37	E/A	CAN bus low	Connector, CAN bus

38	M	Ground Coolant outlet temperature sensor	Coolant outlet temperature sensor

39	E	Signal Coolant outlet temperature sensor	Coolant outlet temperature sensor

40		Not used

Pin assignments at plug connector X2415

Pin	Type	Description / Signal type	Connection / Measuring notes
1	A	Supply, injectors 4-6	U422 Voice input

2		Not used

3	A	Signal, injector 6	Injector 6

4	A	Supply, injectors 1-3	U407 Basic interface telephone

5	A	Signal, injector 1	Injector 1

6	A	Signal, injector 4	Injector 4

7	A	Signal, injector 3	Injector 3

8	A	Signal, injector 2	Injector 2

9	A	Signal, injector 5	Injector 5