Bosch Ml .5.5 System Control Unit Pin Out - Fiat 1998 Marea Service Manual

Marea-Marea Weekend
99 range
Connector B (engine side)
1. Sensors earth
2. Detonation sensor signal
3. Intake air temperature sensor signal
4. Butterfly position senor signal
5. Coolant temperature sensor signal
6. Operation of injector for cylinder 1
7. Operatin of injector for cylinder 4
8. Lamba sensor heater operation
9. N.c.
10. Operation of coil for cylinder 2-3
11. Detonation sensor earth
12. Absolute pressure sensor signal
13. Butterfly position sensor signal
14. N.c.
15. N.c.
16. Operation of injector for cylinder 3
17. Operation of injector for cylinder 2
18. N.c.
19. Operation of coil for cylinders 2-3
20. N.c.
21. Lambda sensor earth
22. Engine rpm sensor positive
23. N.c.
24. N.c.
25. N.c.
26. Idle speed actuator operation
27. N.c.
28. Operation of coil for cylinders 1 -4
29. Sensors supply
30. Lambda sensor signal
31. N.c.
32. Engine rpm sensor negative
33. N.c.
34. Operation of charcoal filter solenoid valve
35. Operation of idle speed actuator
36. N.c.
37. N.c.
38. Operation of coil for cylinders 1 -4
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BOSCH Ml .5.5 SYSTEM CONTROL UNIT PIN OUT

Connector A (vehicle side)
1. N.C
2. Operation of rev counter
3. Operation of fuel pump relay
4. Operation of high speed fan relay
5. N.c.
6. N.c.
7. Control unit supply from relay (+30)
8. Engine started signal (from ignition switch)
9. Engine control system relay feed
10. N.c.
11. Line K
12. Operation of system failure light
13. Operation of low fan speed relay
14. N.c.
15. N.c.
16. CODE connection
17. Control unit supply from relay (+30)
18. Control unit supply (+30)
19. Operation of compressor relay (if fitted)
20. N.c.
21. N.c.
22. Power assisted steering sensor signal
23. N.c.
24. N.c.
25. N.c.
26. N.c.
27. Vehicle speed sensor signal
28. N.c.
29. N.c.
30. N.c.
31. Compressor engagement operation
32. N.c.
33. N.c.
34. Four stage thermostat signal (if fitted)
35. Four stage thermostat signal (if fitted)
36. N.c.
37. N.c.
38. N.c.
Engine
Fuel system
10.
17