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Home >> Subaru >> 2015 >> BRZ Series.Blue, Automatic Trans >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnostics (3 Of 3) >> DTC P0685 Main Relay ON Stuck >> Circuit description

Circuit description

Fig 1: Engine Control Computer Circuit Diagram
G10212880Courtesy of SUBARU OF AMERICA, INC.
DTC DETECTION CONDITION

DTC No. DTC detection conditions Suspected parts
P0685 After IG OFF, the main relay is not switched OFF and the ECM operates longer than the specified time period.
(2 trips detection logic)		 Main relay
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