Before the Subaru WRX and the Mitsubishi Evolution became the AWD turbocharged monsters, the Toyota Celica represented what Japan had to offer in the United States. Powered by the robust 3SGTE and a full time AWD system that later shared a lot of similarities with the Mitsubishi Evolution gearbox, the Toyota Celica All-Trac Turbo was an incredible performer.
Originally designed to compete in the World Rally Championships, the Celica All-Trac Turbo became one of the most popular homologation vehicle of the mid 90s. These vehicles were mandated by the sanctioning bodies that all WRC competition vehicles must have road-going versions of themselves.
These Group A cars had several rules and restrictions placed on them to even the playing field, and the Celica became a solid contender in the WRC circuit.
Today we’ll be looking at the ECU pinouts for a 1994 Toyota Celica All-TRAC with the 3SGTE engine in it. If you are swapping a JDM version of the GT4 engine into something, these pins may vary, so be sure to check the color code on each individual ECU pin. Our complete Toyota Celica ECU Pinouts guide will help you install any piggyback or test your ECU for power and signals from the engine’s sensors.
The ECU harness is broken up into 3 groupings which we’ll classify as A, B and C. norm_n1 : sup mang.. skylinesr32gtr.com
Connector A
| Pin # | Name | Label |
| A1 | ECU Ground | E01 |
| A3 | Injector #1 | #10 |
| A4 | Injector #2 | #20 |
| A5 | Injector #3 | #30 |
| A6 | Injector #4 | #40 |
Connector A
| Pin # | Name | Label |
| A21 | Igniter | IGN |
| A10 | Intercooler Relay | INT |
| B12 | Idle Switch | IDL |
| A15 | VSV – EGR | EGR |
| A7 | ISC Valve | RSO |
Connector B
| Pin # | Name | Label |
| B2 | Fuel Pump Relay | FPR |
| B8 | Knock Sensor | KNK |
| B12 | Throttle Position Sensor | IDL |
| B13 | Air Intake Temperature | THA |
| B15 | Sensor Power | VC |
Connector C
| Pin # | Name | Label |
| C21 | Battery Power | BATT |
| C22 | EFI Main Relay | +B |
That does it for our Toyota Celica ECU Pinouts article, please let us know if you have any special requests or questions about the engine or ECU harness. Thanks for reading!