The SR20DET engine swap isn’t quite the popular engine choice anymore, with all the LS1 and RB/2JZ swaps running around. But there’s still no stopping true 240SX enthusiasts who don’t believe in shoving an American pushrod motor into their 240, nor a inline six iron block such as the 2JZ and RB.
Prices have fallen quite a bit for JDM engines in accordance with falling demand, making the SR20 less of a budget swap than it used to be. When you calculate the prices of engine swaps alone, the truth remains that you aren’t truly saving that much when compared to other motors.
This is where having a SR20DET ECU pinout is so handy because you can do the swap yourself.
But they are still easier and cheaper to bolt into your 240SX, something which should come of no surprise considering it’s the very same engine and transmission offered in Japan. You will not need new mounts, a new driveshaft or any shifter mods, making the SR20DET a great bargain engine swap even today.
Tuning ECU’s have also come a long way, but for the handful of enthusiasts still using piggyback controllers, we’re taking a look at the two different types of ECU’s offered in the Nissan Silvia.
ZENKI – 1991-1995 Nissan SR20DET ECU Pinout
| 3 | Tachometer Signal | RPM |
| 13 | Power Ground (Electronic Concentrated Control System) | Ground |
| 16 | Mass Air Flow Sensor | Analog |
| 17 | Mass Air Flow Sensor Ground | Ground |
| 18 | Engine Coolant Temperature Sensor | Analog |
| 19 | O2 Sensor Signal | Analog |
| 20 | Throttle Position Sensor | Analog |
| 21 | Sensor Ground | Ground |
| 26 | Air Temperature Sensor | Analog |
| 32 | Vehicle Speed Sensor | Speed |
| 39 | Power Ground (Electronic Concentrated Control System) | Ground |
| 101 | Injector # 1 | Speed |
| 103 | Injector # 3 | Speed |
| 110 | Injector # 2 | Speed |
| 112 | Injector # 4 | Speed |
| 116 | Power Ground (Electronic Concentrated Control System) | Ground |
Kouki – 1996-1999 Nissan SR20DET ECU Pinout
| Pin # | Name | Signal Type |
| 2 | Tachometer Signal | RPM |
| 16 | Mass Air Flow Sensor | Analog |
| 17 | Mass Air Flow Sensor Ground | Ground |
| 18 | Engine Coolant Temperature Sensor | Analog |
| 19 | O2 Sensor Signal | Analog |
| 20 | Throttle Position Sensor | Analog |
| 29 | Sensor Ground | Ground |
| 32 | Vehicle Speed Sensor | Speed |
| 101 | Injector # 1 | Speed |
| 103 | Injector # 3 | Speed |
| 110 | Injector # 2 | Speed |
| 112 | Injector # 4 | Speed |
| 116 | Power Ground (Electronic Concentrated Control System) | Ground |
All of our ECU pinouts are always evolving and growing as part of our data collection. If you’ve got a pin we missed or need a pin to complete a job, leave us a message and let us know and we’ll get it added.
Thank you for enjoying our SR20DET ECU pinout, and happy tuning!