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Home >> Hyundai >> 2018 >> Santa Fe XL Luxury >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (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 EMS box and PCM connector.
  2. Measure the resistance between control terminal of main relay (EMS box) harness connector and main relay control terminal of PCM harness connector.

    Specification:  Approx. below 1 Ω

  3. Is the measured resistance within specification?

    YES 

    NO 

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