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Home >> Hyundai >> 2007 >> Santa Fe Limited, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3.3L) (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0646 A/C Clutch Relay Control Circuit Low >> Control Circuit Inspection

Control Circuit Inspection

  1. Check short in harness
    1. IG "OFF".
    2. Disconnect A/C relay and PCM connector.
    3. Measure the resistance between terminal 85 of A/C relay harness connector and chassis ground.

      Specification : Infinite

    4. Is the measured resistance within specification ?

      YES 

      • Go to " 2Check open in harness" as follows.

      NO 

  2. Check open in harness
    1. IG "OFF".
    2. Disconnect A/C relay and PCM connector.
    3. Measure the resistance between terminal 85 of A/C relay harness connector and terminal 64 of PCM harness connector (C130-A).

      Specification : Approx. below 1Ω

    4. Is the measured resistance within specification ?

      YES 

      NO