The following diagram and pinout reference is for the 1991 to 1996 S13 with a redtop/blacktop SR20DET enginshould 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.
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Figure 1:
Pinout Table
| Pin | Wire | Description |
|---|---|---|
| 101 | W/B | Fuel Injector # 1 Drive Input |
| 102 | O/L | EAI AIV Control Solenoid Output |
| 103 | G/B | Fuel Injector # 3 Drive Input |
| 104 | B/P | Fuel Pump Relay |
| 105 | R/W | Fuel Pressure Control Module |
| 106 | G/Y | A/C Relay |
| 107 | B | Fuel Injector Ground |
| 108 | B | Fuel Injector Ground |
| 109 | R | ECU Current Return |
| 110 | Y/B | Fuel Injector # 2 Drive Input |
| 111 | O/B | Turbo Boost Pressure Control Solenoid |
| 112 | L/B | Fuel Injector # 4 Drive Input |
| 113 | SB | Auxiliary Air Control, Idle Speed Control |
| 114 | Br/Y | (unknown function) |
| 115 | ||
| 116 | B | Fuel Injector Ground |
| 1 | R/W | Ignition Signal # 1 |
| 2 | R/Y | Ignition Signal # 2 |
| 3 | Y/R | Tachometer Signal Output |
| 4 | R/B | ECU Relay |
| 5 | ||
| 6 | B | Ignition Signal Ground |
| 7 | G/B | Receive (Control Unit Data Reception) RX |
| 8 | R/G | Ignition Signal # 3 |
| 9 | R/L | Ignition Signal # 4 |
| 10 | G/Y | A/C Relay |
| 11 | ||
| 12 | P/B | Automatic Transmission Gear Select |
| 13 | B | Ignition Signal Ground |
| 14 | G/W | Clock (Synchronization Signal) CLK |
| 15 | G | Transmit (Data Sent From Control Unit) TX |
| 16 | W | Mass Air Flow Sensor Signal Input |
| 17 | B | Mass Air Flow Sensor Ground |
| 18 | L/O | Engine Coolant Temperature Sensor Input |
| 19 | W | Oxygen Sensor Input |
| 20 | W | Throttle Position Sensor |
| 21 | B | Sensor Ground |
| 22 | W | Cam Angle Sensor 180 Degree Signal |
| 23 | G/R | CLK Data Link Connector For Nissan Consult |
| 24 | / | Malfunction Indicator Lamp (Add Wire For Check Engine Light) |
| 25 | O/B | Exhaust Over Temp Warning Lamp Output |
| 26 | L/Y | Exhaust Temperature Sensor |
| 27 | W | Detonation/ Knock Sensor Input |
| 28 | W/L | Automatic Transmission TPS (Kick Down Switch) |
| 29 | B | Sensor Ground |
| 30 | W | Cam Angle Sensor 180 Degree Signal |
| 31 | B | Cam Angle Sensor 1 Degree Signal |
| 32 | Y/G | Vehicle Speed Sensor |
| 33 | ||
| 34 | O | Start Signal |
| 35 | G/O | Park/ Neutral Position Switch |
| 36 | B/R | Ignition Switch |
| 37 | Lg/R | Throttle Position Sensor Power Output |
| 38 | B/W | ECU Power |
| 39 | B | ECU Ground |
| 40 | B | Cam Angle Sensor 1 Degree Signal |
| 41 | L/G | A/C ON Switch |
| 42 | Br/Y | Automatic Transmission Gear Select |
| 43 | Pu/W | Power Steering Oil Pressure Switch (Helps Idle When Turning Wheels) |
| 44 | Lg/R | Automatic Transmission Gear Select |
| 45 | L/W | Intake Air Temperature Sensor |
| 46 | R | ECU Backup Power |
| 47 | B/W | ECU Power |
| 48 | B | ECU Ground |
Links
Acknowledgements
The source for this information came from a spreadsheet I came across a while ago and has not been thouroughly checked. The author of the original spreadsheet is unknown.
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