Nissan 200SX S14 SR20DET ECU Pinouts

The following diagram and pinout reference should help you work out what does what. Handy if your making a field harness or installing a programmable ECU. I’ve numbered and colour coded the pins in figure 1 for easy matching against the pinout table below.

Figure 1:

S14 SR20DET ECU Pinout Reference diagram

Pinout Table

PinWireDescription
101W/BFuel Injector # 1 Drive Input
102L/REGR & Canister Control Solenoid Valve
103G/BFuel Injector # 3 Drive Input
104
105R/YUnknown
106
107BEngine Ground
108BEngine Ground
109RECU Power
110Y/BFuel Injector # 2 Drive Input
111
112L/BFuel Injector # 4 Drive Input
113YVTC Solenoid Valve
114
115BHeated Oxygen Sensor Heater
116BEngine Ground
1R/WPower Transistor Coil Pack # 1
2R/YPower Transistor Coil Pack # 2
3
4SBIACV-AAC Valve
5
6
7L/BTachometer Signal Output
8
9G/YA/C Relay (Triple Pressure Switch)
10BEngine Ground
11R/GPower Transistor Coil Pack # 3
12R/LPower Transistor Coil Pack # 4
13
14
15
16R/BECU Relay (Self Shut-Off)
17
18B/YFuel Pump Relay
19O/LCooling Fan Relay (Low)
20BEngine Ground
21G/BSCI RX (In)
22GSCI TX (Out)
23WKnock Sensor
24
25O/BWastegate Valve Control Solenoid Valve
26BMass Air Flow Sensor Ground
27WMass Air Flow Sensor
28L/OEngine Coolant Temperature Sensor Input
29WHeated Oxygen Sensor
30BEngine Ground
31G/WSCI CLK
32OMalfunction Indicator Lamp
33O/BCooling Fan Relay (High)
34PU/WPower Steering Oil Pressure Switch
35WBoost Pressure Sensor
36BGround
37
38WThrottle Position Sensor
39
40
41WCamshaft Position Sensor (Reference Signal)
42BCamshaft Position Sensor (Position Signal)
43O/LStart Signal
44G/ONeutral Position Switch
45B/RIgnition Switch
46RThermistor Control Amplifier
47G/RCheck Connector
48LG/RThrottle Position Sensor Power Output (AVCC boost)
49B/WECU Power
50BECU Ground
51WCamshaft Position Sensor (Reference Signal)
52BCamshaft Position Sensor (Position Signal)
53Y/GVehicle Speed Sensor
54L/RLoad Signal
55
56
57B/WUnknown
58RPower Supply (Back-Up)
59B/WECU Power
60BECU Ground

Links

Acknowledgements

The source for this information came from a spreadsheet I came across a while ago, I have checked the information here to the best of my ability against various sources on the internet. As a result I cannot guarantee that the information above is indisputable. The author of the original spreadsheet is unknown.

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