The Toyota MR2 as it’s known in the United States was actually part of a redesign in 1990 that led to the chassis we know as the W20. Powered by the turbocharged 3S-GTE that was a bit ahead of it’s time, the rear wheel drive sportscar had a brief glorious run in the US from 1991-1995.
In fact the SW20 MR2 is one of the pioneers of the small displacement turbocharged rear wheel drive import coupes, and sported traits that many of todays manufacturer’s strive to achieve today.
Four trims were available in the Japanese Domestic Market (JDM) however, there’s just the non turbo and turbo versions that made their way stateside. Putting down 200hp in stock form, many engine swappers import the 3S-GTE in for a variety of rear wheel drive donor chassis.
Today we’re looking at the Toyota MR2 Turbo ECU Pinout for the installation of any aftermarket device or piggyback computer. Don’t forget to check our How To’s on installing an AFC in to a MR2 and a HKS FCD into a Toyota MR2.
The Toyota part numbers for this MR2 ECU are
- 89661-17320
- 89661-17321
- 89661-17322
- 89661-17330
- 89661-17331
- 89661-17332
- 89661-20750
- 89661-20751
- 89661-20760
- 89661-20761
Toyota MR2 Turbo ECU Pinout – USDM SW20
Connector A
| Pin # | Name | Label |
| A20 | Ignition Control Module | IGT – TACH + |
| A15 | Power Ground | G1 |
Connector B
| Pin # | Name | Label |
| B6 | Oxygen Sensor | OX |
| B4 | Knock Sensor | KNK |
| B12 | Idle Switch | IDL |
| B9 | Engine Sensor Ground | E2 |
| B11 | Throttle Position Sensor | VTA |
Connector C
| Pin # | Name | Label |
| C2 | Throttle switch | VS |
| C1 | +5 volt sensor | VC |
Connector D
| Pin # | Name | Label |
| D4 | Brake Switch | BRS |
| D9 | Vehicle Speed Sensor | VSS |
That does it for our Toyota MR2 Turbo ECU pinout, please leave any questions or comments for us below.
Other related articles
How To Install a AFC in a Toyota MR2
How To Install a HKS FCD in a Toyota MR2
How To Install Coilovers in a Toyota MR2