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Home >> Hyundai >> 2016 >> Equus Signature >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC P0685: ECM/PCM Power Relay Control Circuit/Open >> System Inspection
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System Inspection

■ Check Generator circuit 

  1. Engine starts.
  2. Maintain ENG RPM 2, 500 RPM over 2 minutes.
  3. Measure voltage between the battery terminal (+) and the battery terminal (-).

    Specification:  Approx. 12.5 ~ 14.7V

  4. Is the measured voltage within specification?

    YES 

    NO 

    • Check that the tension of drive belt, ENG RPM, fuse, terminal of battery, all terminals of generator are in good condition and Check for damaged harness and poor connection between generator and battery. If OK repair or replace generator and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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