Fiat Bravo Service Manual page 231

Bravo-Brava 101
lev
Engine
Fuel system
10.
HITACHI SYSTEM CONTROL UNIT PIN-OUT
109
i n a a D D O D iooooo
>ooooo
ooooooooo
ooooooooo
Ti*
7
Connector A
101. Operation of injector for cylinder 1
102. N.C.
103. Operation of injector for cylinder 2
104. Pump relay operation
105. Operation of injector for cylinder 3
106. Negative for charcoal filter solenoid valve
107. Earth
108. Earth
Connector B
1. Operation of coil for cylinder 1
2. Operation of coil for cylinder 3
3. Operation of rev counter
4. N.C.
5. N.C.
6. Earth
109. Negative for engine idle adjustment solenoid valve
110. Operation of injector for cylinder 4
111. Positive for engine idle adjustment solenoid valve
112. Control unit supply
113. Climate control compressor relay feed (if fitted)
114. N.C.
115. N.C.
116. Earth
7. Operation of coil for cylinder 3
8. Operation of coil for cylinder 4
9. Operation of electric fan low speed relay
10. Operation of electric fan high speed relay *
11. Operation of system failure light
12. Earth
Connector C
13. N.C. 24.
14. Positive for air flow meter 25.
15. Positive for coolant temperature sensor 26.
16. Positive for Lambda sensor 27.
17. Signal for three stage pressure switch (if fitted) 28.
18. N.C. 29.
19. N.C. 30.
20. Connection with FIAT CODE 3 1 .
21. Positive for detonation sensor 32.
22. Negative for air flow meter
23. Line K
N.C.
Signal for butterfly position sensor
Negative for lambda sensor
N.C.
Signal for engaging compressor (if fitted)
A W signal from ignition switch (+50)
N.C.
Earth for detonation sensor
Negative for coolant temperature and butterfly position
Connector D
33. Positive for engine rpm sensor
34. Positive for engine timing sensor
35. Earth for engine rpm sensor
36. Signal for vehicle speed sensor
37. Positive for butterfly position sensor
38. N.C.
39. Control unit supply
40. Earth
4 1 . Negative for engine rpm sensor
42. Negative for engine timing sensor
43. N.C.
44. Calibration selection
45. Trim level selection (to earth for versions without cli­
mate control)
46. Control unit supply
47. Control unit supply
48. Earth
* Short circuited at pin 9 for versions without climate con­
trol
Copyright by Fiat Auto
VI-96 - Cancels and replaces
21