R34 Nissan Skyline ECU pin outs
1 2 3 20 21 22 23 44 45 46 47 64 65 66
101 102 103 104 105 106 107 108 4 24 25 67
5 6 7 8 9 26 27 28 29 30 48 49 50 51 52 53 68 69 70 71
109 110 111 112 113 114 115 116 10 31 32 72
11 12 13 14 33 34 35 36 37 54 55 56 57 58 73 74 75 76
117 118 119 120 121 122 123 124 15 16 17 18 19 38 39 40 41 42 43 59 60 61 62 63 77 78 79 80
Terminal number Description Terminal number Description
1 Ign signal (power transistor) Cyl #1 63 Knock sensor signal 2
2 Ign signal (power transistor) Cyl #5 64 A/T mode switch signal (POWER) [RB20DE (L/B) A/T]
3 Ign signal (power transistor) Cyl #3 65 DB (data bush 1 signal [RB25DET A/T]
4 ECM & IGN coil relay control signal 66 DB (data bush 3 signal [RB25DET A/T]
5 Tachometer drive signal 67 Control unit power supply
6 - *68 O/D Off indicator lamp
7 Ign signal (power transistor) Cyl #6 69 DB (data bush 2 signal [RB25DET A/T]
8 Ign signal (power transistor) Cyl #2 70 A/T mode switch signal (SNOW) [RB20DE (L/B) A/T]
9 Ign signal (power transistor) Cyl #4 *71 Stop lamp switch signal
10 - 72 Control unit power
11 AAC valve control signal 73 -
12 - 74 -
13 Fuel pump relay control signal 75 (RX) Receive (Data input to control unit)
14 Air conditioner control signal 76 (TX) Transmit (Data output to control unit)
15 - 77 -
16 - 78 Auxiliary electric fan relay control signal [RB25DE, RB25DET]
ECM TCM, TCS/ABS integrated control signal ] Multiple com-
17 Malfunction indicator lamp 79
munication] [RB25DE A/T, RB25DET
18 - 80 Battery power supply
19 - 81 -
20 Ignition switch (START) signal 82 -
21 Air conditioner switch signal 83 -
22 (CHK) Check (Diagnosis start) 84
23 Throttle position sensor signal 85 -
24 (IGN) Ignition switch (IGN) signal 86 -
25 Control unit ground 87 -
26 Power steering oil pressure switch signal 88 -
27 - 89 -
28 SB (select bit) 1 signal [RB25DET A/T] 90 -
29 Vehicle speed sensor signal (Vehicle speed sensor 2) 91 -
30 Headlamp switch signal; 92 -
31 Ignition power supply 93 -
32 Control unit ground 94 -
*33 Idle position switch signal 95 -
*34 "1" position switch signal 96 -
*35 "2" position switch signal 97 -
36 - 98 -
Throttle opening signal
37 99 -
[RB25DE-4WD M/T, RB25DE A/T, RB25DET]
*38 "0" position switch signal 100 -
39 Neutral signal (Park/neutral position signal) 101 Injector No. 1 cylinder drive signal
*40 "R" position switch signal 102 -
*41 Full switch signal 103 Injector No. 3 cylinder drive signal
Variable air intake control solenoid valve control signal
[RB25DE (L/B), RB25DE]
42 - 104
Turbo pressure control solenoid valve controls
[RB25DET]
43 Sensor ground 105 Injector No. 2 cylinder drive signal
44 Crankshaft position sensor 120˚ (REF) signal *106 Line pressure solenoid valve control signal
Air jet swirl control s solenoid valve control signal [ RB20DE (L/
45 Crankshaft position sensor 120˚ (REF) signal 107
B)]
46 Crankshaft position sensor 1˚ (POS) signal 108 Canister purge control valve control signal
Ring gear crankshaft position sensor signal [RB20DE (L/B)] Control unit power supply (Counter-electromotive current
47 109
Turbo pressure sensor signal [RB25DET] feedback circuit)
Power supply for throttle position sensor, refrigerant pressure
48 110 Injector No. 2 cylinder drive signal
sensor, and turbo pressure sensor
49 Rear defogger switch signal 111 Fuel pump terminal voltage control output signal [RB25DET]
50 Heated oxygen sensor signal 112 Injector No. 6 cylinder drive signal
Line pressure solenoid valve control signal (Dropping resistor
51 Throttle motor sensor signal [RB25DET] *113
circuit)
52 SB (select bit) 2 signal [RB25DET A/T] 114 Injector No. 4 cylinder drive signal
53 Motor throttle switch signal [RB25DET] *115 Overrun clutch solenoid valve control signal
54 Mass airflow sensor signal 116 Injector ground
55 Mass airflow sensor ground 117 Variable timing control solenoid valve control signal
56 Engine coolant temperature sensor signal 118 Heated oxygen sensor heater control signal
57 Refrigerant pressure sensor signal *119 Power indicator lamp
*58 Output shaft rotation sensor signal (Vehicle speed sensor 1) *120 Lockup solenoid valve control signal
59 Turbine sensor signal [RB25DET A/T] *121 Shift solenoid valve A control signal
*60 Oil temperature sensor signal *122 Shift solenoid valve B control signal
61 - 123 -
62 Knock sensor signal 1 124 Injector ground
Symbols in ( ) next to terminal numbers indicate the data ling connector terminals. Items marked with * are available on RB20DE
