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Home >> Genesis >> 2019 >> G80 3.8, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 3.8L (3 Of 3) >> DTC P0685: ECM/PCM Power Relay Control Circuit/Open >> Wiring Inspection >> Control Circuit Inspection >> Check Open In Harness

Check Open In Harness

  1. IG "OFF". Disconnect the metal core box and ECM (PCM) connector.
  2. Measure the resistance between main relay control terminal of metal core box harness connector and main relay control terminal of ECM (PCM) harness connector.

    Specification:  Approx. below 10.

  3. Is the measured resistance within specification?

    YES 

    • Substitute with a known - good metal core box and check for proper operation. If the problem is corrected, replace metal core box and go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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