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Home >> Genesis >> 2017 >> G80 3.8, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) - 3.8L >> DTC P0685: ECM/PCM Power Relay Control Circuit Open >> Wiring Inspection >> Power Circuit Inspection

Power Circuit Inspection

■ Check voltage 

  1. IG "OFF". Disconnect the metal core box.
  2. IG "ON"
  3. Measure the voltage between power supply terminal of metal core box harness connector to coil of main relay and chassis ground.

    Specification:  Approx. B+

  4. Is the measured voltage within specification?

    YES 

    NO 

    • Check the fuse between battery and metal core box.
    • Repair open or short to ground in power harness. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.