ECM (page 4 of 4)

ENGINE MANAGEMENT SYSTEM - SIEMENS

18-4-12 DESCRIPTION AND OPERATION

Controller Area Network (CAN) Bus
The ECM is connected to the Anti-lock Braking System (ABS) modulator, EAT ECU and the instrument pack by the 
CAN bus.

22

IAT sensor signal

Input

23

IAT sensor earth

–

24

ECT sensor signal

Input

25

ECT sensor earth

–

26 and 28

Not used

–

29

LH bank knock sensor

Input

30

LH bank knock sensor

Input

31

RH bank knock sensor

Input

32

RH bank knock sensor

Input

33

Fuel injector 1

Output

34

Fuel injector 3

Output

35

Fuel injector 5

Output

36

Fuel injector 2

Output

37

Fuel injector 6

Output

38

Fuel injector 4

Output

39 to 41

Not used

–

42

EVAP purge valve drive

Output

43

Throttle motor open drive

Output

44

Throttle motor close drive

Output

45 to 47

Not used

–

48

Knock sensors screen

Input

49

VIS power (butterfly) valves motor drive

Output

50

Not used

–

51

DMTL heater drive

Output

52

Not used

–

Pin No.

Description

Input/Output