How-to Locate 02-04 Honda Civic/Acura ECU Wiring Harness

Locate the engine control unit (ECU) of Honda Civic SI/Acura RSX 2002-2004 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 Acura RSX/Honda Civic SI 2002-2004 K20A2 ECU Location-4 (behind the glove box) Pressure Sensor 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.

(source: hksusa.com)