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Home >> Subaru >> 2017 >> WRX Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System (Diagnostics) (P0171 To P0685) (2.0L) >> Diagnostic Procedure with Diagnostic Trouble Code (DTC) >> DTC P0685 ECM/Pcm Power Relay Control Circuit/Open >> Outline Of Diagnosis

Outline Of Diagnosis

Detect the main relay stuck to ON.

Judge as NG when ECM keeps operating for more than predetermined time although the main relay does not turn to OFF after ignition switch is turned to OFF.