Connector & Terminal Identification
WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, 2003 Subaru Impreza, 2003 Subaru Forester, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.
The ECM has 4 connectors (Impreza 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.