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Home >> Kia >> 2009 >> Rio Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> DTC Troubleshooting Procedures (2 Of 2) >> DTC P0645 A/C Clutch Relay Control Circuit >> Component Inspection
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Component Inspection

  1. A/C relay check
    1. Key "OFF".
    2. Disconnect A/C relay.
    3. Measure the resistance between terminal 1 and 2 of A/C relay component side.
    4. Measure the resistance between terminal 3 and 5 of A/C relay component side.
      RESISTANCE SPECIFICATION

      Terminal Continuity
      1-2 NO
      3-5 YES (Approx. 70-120Ω)
      Fig 1: Measuring Resistance Between A/C Relay Terminals
      G04862335Courtesy of KIA MOTORS AMERICA, INC.
    5. Is the measured resistance within specification?

      YES 

      • Substitute with a known-good ECM/PCM and check for proper operation. If the problem is corrected, replace ECM/PCM and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      NOTE: There is a memory reset function on scan tool that can erase optional parts automatically detected and memorized by ECM/PCM.
      Before or after testing ECM/PCM on the vehicle, use this function to reuse the ECM/PCM

      NO 

      • Substitute with a known-good A/C relay and check for proper operation. If the problem is corrected, replace A/C relay and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
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