Disconnect engine wiring harness

AR01.00-P-2410-02MT

Disconnect engine wiring harness

ENGINE

270 in MODEL 117, 156, 176, 242, 246

 Starter

Number

Designation

ENGINE 270

BA15.30-P-1001-01J

Nut, connection for terminal designation 30

Nm

15

 Alternator

Number

Designation

ENGINE 270

BA15.40-P-1002-01F

Nut, circuit B+ to alternator

Nm

16

Work procedure shown on model 246.2

1

Detach electrical lines (1, 2) on ME-SFI [ME] control unit (N3/10).

2

Disconnect electrical connection for engine wiring harness/engine compartment (X26) at connecting point and set aside.

3

Detach ground line (4) from longitudinal member at front left.

4

Detach electrical line for "circuit 30" on starter (M1), unclip from holders and set aside. 

5

Disconnect electrical line (8) on radiator shutters actuator (Y84) and set aside.

6.1

ENGINE 270 in MODEL 117, 156, 176, 242, 246 with TRANSMISSION 711
Disconnect electrical connection from position sensor for main shifter shaft on manual transmission (B79/3), unclip and set aside.

6.2

ENGINE 270 in MODEL 117, 156, 176, 242, 246 with TRANSMISSION 724
Disconnect electrical connection from dual clutch transmission fully integrated transmission control controller unit (Y3/14), unclip and set aside.

7

Disconnect electrical line for "circuit B+" on alternator (G2), unclip on lower radiator support and set aside. 

8

Disconnect electrical connection for oxygen sensor downstream of catalytic converter (G3/1).

9

Disconnect electrical connection at A/C compressor (A9).

10

Unclip engine wiring harness on crankcase.

11

Disconnect electrical connection at alternator (G2).

12

Disconnect electrical connection at bypass air switchover valve (Y101).

13

Unclip engine wiring harness on turbocharger.

14

Unclip engine wiring harness at coolant line.

15

Disconnect electrical connection at intake camshaft Hall sensor (B6/15).

16

Disconnect electrical connection at exhaust camshaft Hall sensor (B6/16).

17

Disconnect electrical connection on wide open throttle operation vent line heater element (R39/2).

18

ENGINE 270 in MODEL 117, 156, 176, 242, 246
with CODE A14 (Camtronic)
Disconnect electrical connection at intake camshaft valve lift switching actuator.

19

Disconnect electrical connection at pressure sensor downstream of air filter (B28/5).

20

Disconnect electrical connection at cylinder 1 ignition coil (T1/1).

21

Detach engine wiring harness on cylinder head cover.

22

Disconnect electrical connection at cylinder 2 ignition coil (T1/2).

23

Disconnect electrical connection at cylinder 3 ignition coil (T1/3).

24

Disconnect electrical connection at cylinder 4 ignition coil (T1/4).

25

Disconnect electrical connection at cylinder 1 injection nozzle (Y76/1).

26

Disconnect electrical connection at cylinder 2 injection nozzle (Y76/2).

27

Disconnect electrical connection at cylinder 3 injection nozzle (Y76/3).

28

Disconnect electrical connection at cylinder 4 injection nozzle (Y76/4).

29

Disconnect electrical connection at intake camshaft solenoid (Y49/1).

30

Disconnect electrical connection at exhaust camshaft solenoid (Y49/2).

31

Disconnect electrical connection on fuel pressure and temperature sensor (B4/25).

32

Disconnect electrical connection at quantity control valve (Y94).

33

Disconnect electrical connection on charge air temperature sensor upstream of throttle valve (B17/7).

34

Disconnect electrical connection at pressure sensor upstream of throttle valve (B28/6).

35

Disconnect electrical connection at throttle valve actuator (M16/6) and unclip electrical line on throttle valve actuator (M16/6).

36

Disconnect electrical connection at oxygen sensor upstream of catalytic converter (G3/2).

37

Place engine wiring harness to one side.

38

Disconnect electrical connection at pressure sensor downstream of throttle valve (B28/7).

Carry out operation steps 38 to 42 only on vehicles with code 924 (Bivalent natural gas drive).

39

Disconnect electrical connection on low pressure and temperature sensor GAS (B18/6).

40

Disconnect electrical connection at cylinder 1 gas injection valve gas (Y106/1).

41

Disconnect electrical connection at cylinder 2 gas injection valve gas (Y106/2).

42

Disconnect electrical connection at cylinder 3 gas injection valve gas (Y106/3).

43

Disconnect electrical connection at cylinder 4 gas injection valve gas (Y106/4).

44

Disconnect electrical connection at charge air temperature sensor downstream of throttle valve (B17/9).

45

Disconnect electrical connection at boost pressure control pressure transducer (Y77/1).