The blacktop SR20DET has certainly enjoyed a colorful production run until it’s eventual removal from the Nissan lineup in 2002. Fans of the Nissan 240SX and Silvia still continue to enjoy the flexibility and low price associated with this JDM engine. Today we are looking at the ECU PINOUT for the S14 and S15 SR20DET Blacktop engine.
This version of the SR20 was the first to utilize the VCT timing mechanism now common in Nissan engines like the VQ35DE. The last SR20DET also received heavy modifications and changes to the intake manifold and throttle body. The same ball bearing T38 Disco Potato turbo, along with an upgraded 480cc high impedence injectors helped this SR put down 247hp @ 6400RPM.
For all SR20DET engines from 1999-2002 found in the S15, we’ve got the complete ECU pinout and wiring diagram for your engine swap or ECU wiring. Enjoy our S15 SR20DET ECU PINOUT below and let us know if you have any questions or comments.
| 109 | W | ECU Backup Power |
| 110 | L/R | Fuel Injector # 2 |
| 111 | B/R | Front Heated Oxygen Sensor Heater |
| 112 | L/B | Fuel Injector # 4 |
| 113 | SB | IACV, AAC (Auxiliary Air Control) |
| 114 | / | |
| 115 | O/B | Wastegate Valve Control Solenoid Valve |
| 116 | B | ECU Ground |
| 8 | / | NATS |
| 9 | P/B | Cooling Fan Relay (Low) |
| 10 | L/G | Cooling Fan Relay (High) |
| 11 | G | Air Conditioner Relay |
| 12 | Pu/W | Automatic Transmission Signal # 3 |
| 13 | B | ECU Ground |
| 14 | / | |
| 23 | G/R | Data Link Connector |
| 24 | O | Malfunction Indicator Lamp |
| 25 | R/L | Ignition Signal # 4 |
| 26 | / | |
| 27 | W | Knock Sensor |
| 28 | R/Y | Throttle Posion Sensor Signal Output |
| 29 | / | |
| 30 | B/Y | Camshaft Position Sensor (Position Signal) |
| 40 | / | |
| 41 | L/B | Air Conditioner Switch |
| 42 | / | |
| 43 | Pu/W | Power Steering Oil Pressure Switch |
| 44 | L/W | Automatic Transmission Signal # 2 |
| 45 | L/O | Automatic Transmission Signal # 1 |
| 46 | W | ECU Backup Power |
| 47 | B/W | ECU Power |
| 48 | B | ECU Ground |
| 101 | W/G | Fuel Injector # 1 |
| 102 | / | |
| 103 | G/B | Fuel Injector # 3 |
| 104 | / | |
| 105 | R/L | Intake Valve Timing Control Solenoid Valve |
| 106 | B/P | Fuel Pump Relay |
| 107 | B | ECU Ground |
| 108 | B | ECU Ground |
| 1 | R/W | Ignition Signal # 1 |
| 2 | L/O | Tachometer |
| 3 | Br/R | Ignition Signal # 2 |
| 4 | R/B | ECU Relay |
| 5 | R/G | Ignition Signal # 3 |
| 6 | B | ECU Ground |
| 7 | Br/Y | Data Link Connector |
| 15 | SB | Data Link Connector |
| 16 | L | Mass Air Flow Sensor |
| 17 | P | Mass Air Flow Sensor Ground |
| 18 | P/B | Engine Coolant Temperature Sensor |
| 19 | W | Front Heated Oxygen Sensor |
| 20 | R | Throttle Position Sensor |
| 21 | Gy | TPS Ground |
| 22 | / | |
| 31 | LG | Camshaft Position Sensor (Reference Signal) |
| 32 | W/Pu | Vehicle Speed Sensor |
| 33 | G/R | Electrical Load Signal (Headlamp and Rear Defogger) |
| 34 | O/L | Start Signal |
| 35 | G/O | Park/ Neutral Position Switch |
| 36 | B/R | Ignition Switch |
| 37 | Lg/R | Sensor’s Power Supply |
| 38 | B/W | ECU Power |
| 39 | B | ECU Ground |
We’ve also included the S15 SR20DET dash wiring harness below to complete our S15 SR20DET ECU PINOUT article.
Wire Color – Wire Value
org/blu – ignition 12v start signal
blk/rd – injector power
wht/blk – 12v constant power
lt brn – 12v start signal, power to mafs, egr, etc.
org – malfunction indicator lamp
lt blu – check connector
pink – egr
wht/pur – speed input from cluster to ecu
blk/pnk – fuel pump
grn/org – neutral pos sw.
blu/org – tach
lt grn – speed signal from abs ecu to cluster
grn – ac relay
pnk/blk – cooling fan
blu/wht – water temp
brn/wht – ac control box
pur &
lt grn/rd – front rt abs pickup
brn/rd &
wht/grn – rr abs pickup/speed sensor
blu/rd – abs malfunction indicator lamp
gry/rd – abs ecu power
rd – stop lamp sw.
blu/rd (thick) – IACV-FICD
wht (thick) – eccs relay
grn/rd – not used
blk – ground
This does it for our S15 SR20DET ECU PINOUT Guide, please make sure to check out our other Nissan related articles below.
- How To Test a VQ35 Camshaft Position Sensor
- How To Test Vq35 Nissan Ignition Coils
- How To Service Nissan Drive by Wire
- How to Wire a LS1 into a S14
- How to Wire a 2JZ into a S13