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Home >> Hyundai >> 2010 >> Azera GLS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC P0685: ECM/PCM Power Relay Control Circuit Open >> Inspection/Repair >> W/Harness Inspection >> Power Circuit Inspection
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Power Circuit Inspection

  1. IG "OFF"
  2. Disconnect Main Relay
  3. IG "ON" & ENG "OFF".
  4. Measure voltage between harness terminal 2 of Main Relay and chassis ground.
  5. Measure voltage between harness terminal 5 of Main Relay and chassis ground.

    Specification:  Approx. B+

    Fig 1: Measuring Voltage Between Harness Terminal 5 Of Main Relay And Chassis Ground
    G06804584Courtesy of HYUNDAI MOTOR CO.
  6. Is the measured voltage within specification?

    YES 

    NO 

    • Check fuse between battery and main relay is disconnected.
    • Repair or replace open or short in harness and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.