A2249 Digital diesel electronics control unit

Plug connector overview

Number	X-pin, colour	Description
X2411	9-pin, black	Plug connector Digital diesel electronics control unit Module 1
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

Pin assignments at plug connector X2411

Pin	Type	Description / Signal type	Connection / Measuring notes
1	E	Voltage supply terminal 15/30	Fuse carrier, engine electronics

2		Not used

3		Not used

4	M	Ground	Ground connector

5	M	Ground	Ground connector

6	M	Ground	Ground connector

7		Not used

8	E	Voltage supply terminal 15/30	Fuse carrier, engine electronics

9	E	Activation of DDE main relay (HRL)	DDE relay

Pin assignments at plug connector X2413

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

2	E	Signal, hot-film air mass meter	Hot-film air mass meter

3	M	Ground, hot-film air mass meter	Hot-film air mass meter

4		Not used

5	E	Signal SD nozzle	SD nozzle

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

7	E	Signal Injection pump	Injection pump

8		Not used

9	E	Signal Solenoid valve, supercharger control	Solenoid valve, supercharger control

10	E	Signal Changeover valve for exhaust gas recirculation (AGR)	Changeover valve for exhaust gas recirculation (AGR)

11		Not used

12	E	Signal Preheater relay	Preheater relay

13	A	Electrical changeover valve for engine mount activation	Electrical changeover valve, engine mount

14	A	Supply for 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		Not used

18	M	Ground SD nozzle	SD nozzle

19		Not used

20		Not used

21	E	Switch-off signal	Injection pump

22		Not used

23		Not used

24		Not used

25		Not used

26		Not used

27		Not used

28	E	Signal Dual temperature sensor	Dual temperature sensor

29		Not used

30		Not used

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

32	M	Ground	Connector, sensor ground X2052

33	E	Supply Hot-film air mass meter	Hot-film air mass meter

34		Not used

35		Not used

36		Not used

37		Not used

38		Not used

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	E/A	CAN-bus low	Injection pump

45	E/A	CAN-bus high	Injection pump

46		Not used

47		Not used

48		Not used

49		Not used

50	E	Battery charge indicator lamp signal (terminal 61)	Alternator

51	E	Start signal	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

2	A	Start signal	Instrument cluster Integrated electronic control unit (IKE)

3		Not used

4	A	Activation, relay box	Relay box, fan stage II and III

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 switch	Instrument cluster

12	M	Ground Pedal position sensor	Pedal position sensor

13		Not used

14		Not used

15		Not used

16	A	Signal Pedal position sensor	Pedal position sensor

17	A	Engine speed signal output (TD)	Diagnostic connector

18		Not used

19	E	Reversing light signal	Instrument cluster Integrated electronic control unit (IKE)

20		Not used

21	A	Signal Oil level sensor	Light module

22	E	Signal Rear right wheel speed sensor	ABS/ASC control unit

23	E	Signal Clutch switch	Clutch switch RHD Clutch switch module LHD

24	E	Brake light switch signal	Brake light switch

25		Not used

26	A	Voltage supply, terminal 15	Fuse F14

27	E	Data link MFL	Coil spring

28	E	Brake light test signal	Brake light switch

29	E	A/C compressor signal	Heating and A/C control module

30		Not used

31		Not used

32	E/A	Communication link TXD	Diagnostic connector

33	E	Signal, electronic immobilizer EWS (S-DWA)	Electronic immobilizer control unit (EWS)

34		Not used

35		Not used

36	E/A	CAN interface CAN-HIGH (CAN-H)	CAN link

37	E/A	CAN interface CAN-LOW (CAN-L)	CAN link

38		Not used

39		Not used

40		Not used