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my ecu died (water and bad wiring choice on my part).

firstly S1 or S2 rb25det - whats the quickest way to tell the difference?

ECU's, i'm using an r33 auto box and wanted to know if i need the correct serice ECU to run with the auto box?

say if i have a S1 engine do i need a S1 auto ECU or can i use a S1 manual ECU?

cheers, Matt..

Ecu pinout: rb25det eccs control unit pin layout.

1 Ign signal (power transistor) Cyl #1

2 Ign signal (power transistor) Cyl #5

3 Ign signal (power transistor) Cyl #3

5 engine. A/T control input signal (bt1)

6 Sub electrical fan relay (engine temp switch)

7 Tacometeter speed signal

9 AC relay (AC cut signal)

10 Ground (ign signal system)

11 Ign signal (power transistor) Cyl #6

12 Ign signal (power transistor) Cyl #2

13 Ign signal (power transistor) Cyl #4

14 engine. a/t control input sigal (bt2)

15 engine. a/t control input sigal (bt3)

16 ECCS relay

18 fuel pump relay

19 Power steering switch

20 Ground (ignition signal system)

21(RX) Receive (control unit data reception)

22 (TX) Transmit (data sent from control unit)

23 Detonation sensor 1 (cyl 1-3)

24 Detonation sensor 2 (cyl 4-6)

26 Air flow meter ground

27 Air flow meter intake air quantity signal

28 Engine temp sensor

29 Exhaust gas sensor

30 Sensor ground (throttle sen, ENG temp)

31 clock (synchronization signal)

32 Monitor and check lamp (red)

38 Throttle opening output

41 Crank angle sensor (120degree signal)

42 Crank angle sensor (1 degree signal)

43 Ignition switch START signal

44 Neutral switch

45 Ignition switch (IGN)

46 AC switch

47 (CHK) Check (diagnosis activation)

48 Throttle sensor power supply

49 Control unit power supply

50 Ground (control unit)

51 Crank angle sensor (120 degree signal)

52 Crank angle sensor (1 degree signal)

53 Vehicle speed sensor

54 Throttle valve switch (idle connection pt)

56 Throttle sensor output signal

57 Throttle valve switch power supply

58 Battery power supply

59 Control unit power supply

60 Ground (control unit)

101 Injector #1

103 Injector #3

104 Fuel pump terminal voltage control output

105 Injector #2 107 Injector ground

108 Injector ground

109 Injector power supply

110 Injector #5

112 Injector #4

114 Injector #6

115 exhaust gas sensor heater ground

116 injector ground

i think theres only a couple that link the auto trans ecu to the engine eccs system, i the only sensor the auto trans takes from is the TPS. "when to kick down a gear when in drive" is all it means"

Edited by nizmonut

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