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Home >> Hyundai >> 2006 >> Accent Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0645 A/C Clutch Relay Control Circuit >> Component Inspection

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.
      A/C RELAY SPECIFICATION

      Terminal Continuity
      1 ~ 2 NO
      3 ~ 5 YES (Approx. 70 ~ 120Ω)
      Fig 1: Measuring Resistance Between Terminal 3 And 5 Of A/C Relay And Terminals 1 And 2
      G04801676
    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.

      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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