Siemens 5WY 2 Connector Pinout

Note: SIMK41 and SIMK43 pinouts are different! Using the wrong ECM or harness will result in damage to your vehicle! Use at your own risk. Verify the type of ECM and harness before proceeding.

SIMK41 2MBit (MAP)

ECM Socket 81-pin
Pin	Type	Description	Notes
1	Ground	Ground
2	Ground	Ground
3	Power	Memory Power Supply
4	Output	Ignition Coil #1
5	Output	Ignition Coil #2
6	I/O	CANBUS Low
7	I/O	CANBUS High
8	Output	O2 Sensor Heater Control
9	Output	O2 Sensor Heater control
10	Input	Knock Sensor
11
12
13
14	Power	Battery
15
16
17	Input	Wheel Speed Sensor
18	Input	WHeel Speed Sensor
19
20
21	Power	Battery
22	Input	On/Start Input
23	Output	Injector #4 Control
24	Output	Injector #1 Control
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81

SIMK43 4MBit (MAF)

ECM Socket 81-pin
Pin	Type	Description	Notes
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81