Nissan 200SX S15 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:

S15 SR20DET ECU Pinout Reference diagram

Pinout Table

101W/GFuel Injector # 1
103G/BFuel Injector # 3
105R/LIntake Valve Timing Control Solenoid Valve
106B/PFuel Pump Relay
107BECU Ground
108BECU Ground
109WECU Backup Power
110L/RFuel Injector # 2
111B/RFront Heated Oxygen Sensor Heater
112L/BFuel Injector # 4
113SBIACV, AAC (Auxiliary Air Control)
115O/BWastegate Valve Control Solenoid Valve
116BECU Ground
1R/WIgnition Signal # 1
3Br/RIgnition Signal # 2
4R/BECU Relay
5R/GIgnition Signal # 3
6BECU Ground
7Br/YData Link Connector
9P/BCooling Fan Relay (Low)
10L/GCooling Fan Relay (High)
11GAir Conditioner Relay
12Pu/WAutomatic Transmission Signal # 3
13BECU Ground
15SBData Link Connector
16LMass Air Flow Sensor
17PMass Air Flow Sensor Ground
18P/BEngine Coolant Temperature Sensor
19WFront Heated Oxygen Sensor
20RThrottle Position Sensor
21GyTPS Ground
23G/RData Link Connector
24OMalfunction Indicator Lamp
25R/LIgnition Signal # 4
27WKnock Sensor
28R/YThrottle Posion Sensor Signal Output (A/T)
30B/YCamshaft Position Sensor (Position Signal)
31LGCamshaft Position Sensor (Reference Signal)
32W/PuVehicle Speed Sensor
33G/RElectrical Load Signal (Headlamp and Rear Defogger – Pu A/T)
34O/LStart Signal
35G/OPark/ Neutral Position Switch (R/G A/T)
36B/RIgnition Switch
37Lg/RSensor’s Power Supply (TPS)
38B/WECU Power
39BECU Ground
41L/BAir Conditioner Switch (Dual Pressure Switch)
43Pu/WPower Steering Oil Pressure Switch
44L/WAutomatic Transmission Signal # 2
45L/OAutomatic Transmission Signal # 1
46WECU Backup Power
47B/WECU Power
48BECU Ground



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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