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Home >> Subaru >> 2021 >> Legacy Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System (2.5L) (Diagnostics) (2 Of 4) >> Diagnostic Procedure With Diagnostic Trouble Code (DTC) >> DTC P0685: ECM/Pcm Power Relay Control Circuit/Open >> General Description >> Diagnostic Method
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Diagnostic Method

If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.

JUDGMENT VALUE SPECIFICATION

Malfunction Criteria Threshold Value
ECM status In operation

Time needed for diagnosis:  2500ms

Malfunction indicator light illumination:  Illuminates when malfunction occurs in 2 continuous driving cycles.