How-to Locate ’86-’89 Toyota Celica ECU Wiring Harness

Locate the engine control unit (ECU) of Toyota Celica All Trac using the following diagram. The diagram is shown from the wire side of the harness.

The diagram may differ depending on vehicle year or model (california or federal). It shows Toyota Celica 1986-1989 3S-GTE ECU Location in the back of Center Console, Hot Wire (0-5V) Type. Notes: B- 12 volt ignition, U- 12 volt battery, E- ECU Ground, P- Pressure sensor Air flow signal, I- RPM signal, S- Speed Sensor, T- Throttle Position Sensor, #- Injector Signal.

Please confirm that the ’86-’89 Toyota Celica ECU Wiring Harness diagram shown corresponds to your vehicle by referencing the factory repair manual.