Connector & Terminal Identification
WARNING: This page is about a different car, the 2002 Subaru Outback, 2002 Subaru Legacy, 2002 Subaru Impreza, and 2002 Subaru Forester. However, it is still accessible from the selected car via links, so may be relevant.
The ECM has 4 connectors (Impreza WRX 2.0L has 5 connectors). For connector and terminal identification, see appropriate pin voltage chart in PIN VOLTAGE CHARTS article. For wire color identification, see ENGINE PERFORMANCE in appropriate SYSTEM WIRING DIAGRAMS article in ELECTRICAL.