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Home >> Hyundai >> 2007 >> Santa Fe GLS, AWD, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2.7L) (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0685 ECM/Pcm Power Relay Control Circuit/Open >> Control Circuit Inspection

Control Circuit Inspection

  1. Check short in harness
    1. IG "OFF".
    2. Disconnect Main Relay and PCM connector.
    3. Measure resistance between terminal 86 of Main Relay and chassis ground.
    4. Measure resistance between terminals 86 and 85 of Main Relay.

      Specification : Infinite

      Fig 1: Measuring Resistance Between Terminals 86 And 85 Of Main Relay
      G05349246Courtesy of HYUNDAI MOTOR CO.
    5. Is the measured resistance within specification ?

      YES 

      • Go to " Check open in coil control " as follows.

      NO 

  2. Check open in harness
    1. IG "OFF".
    2. Disconnect Main Relay and PCM connector.
    3. Measure resistance between harness terminal 86 of Main Relay and harness terminal 43 of PCM harness connector.

      Specification : Approx. below 1Ω

      Fig 2: Measuring Resistance Between Harness Terminal 86 Of Main Relay And 43 Of PCM Harness Connector And Terminal
      G05349247Courtesy of HYUNDAI MOTOR CO.
    4. Is the measured resistance within specifications ?

      YES 

      NO