Engine Control Module

NOTE: Slots marked in black are not used.

1 - Ignition coil
2 - Ground, ignition output stage (MP IX)
3 - Ground (Fuel pump relay)
4 - Idle speed positioner, opening winding
5 - not used
6 - Speed signal at rev counter
7 - Air mass sensor signal
8 - Hall sender signal
9 - Speed signal from speedometer
10 - Ground, electronics (MP VIII)
11 - Knock sensor 1
12 - Positive terminal, Hall sender/throttle
13 - Diagnostics L-wire
14 - Ground, injection valves (MP IX)
15 - not used
16 - Injection valve cylinder 3
17 - Injection valve cylinder 1
18 - Terminal 30
19 - Ground, electronics
20 - not used
21 - Check Engine warning lamp
22 - Idle speed positioner, closing winding
23 - VarioCam
24 - Ground of remaining output stages (MP IX)
25 - Hot-wire burnoff
26 - Ground, air mass sensor
27 - Terminal 15
28 - Oxygen sensor/idle CO potentiometer
29 - Knock sensor 2
30 - Ground NTC/shield knock sensor
31 - Knock yes/no
32 - Control of AC relay
33 - Tank venting valve
34 - Injection valve cylinder 2
35 - Injection valve cylinder 4
36 - DME relay 85
37 - DME relay 87
38 - not used
39 - not used
40 - AC switch input
41 - Coolant temperature switch (115°C)
42 - Position switch (selector lever)
43 - not used
44 - Ground, version coding
45 - Engine temperature sensor 2
46 - not used
47 - Oil temperature sensor
48 - Speed signal / reference mark
49 - Speed signal / reference mark
50 - not used
51 - Ignition angle cut-in (Tiptronic)
52 - Throttle position to transmission control unit
53 - Signal from throttle potentiometer
54 - Version coding
55 - Diagnosis for lead K