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Home >> Hyundai >> 2004 >> Accent Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (2 Of 2) >> DTC Troubleshooting Procedures >> DTC P0645: A/C Clutch Relay Control Circuit >> Power Circuit Inspection
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Power Circuit Inspection

  1. Check for open in harness
    1. Ignition "OFF"
    2. Disconnect A/C Relay.
    3. Ignition "ON" & Engine "OFF"
    4. Measure voltage between terminal 1 and 5 of A/C Relay harness connector and chassis ground.

      Specification: approximately B+

      Fig 1: Measuring Voltage Between Terminal 1 And 5 Of A/C Relay Harness Connector And Chassis Ground
      G03852023Courtesy of HYUNDAI MOTOR CO.
    5. Is measure voltage within Specification?

      YES 

      NO 

      • Open circuit or short circuit to chassis ground between A/C Relay harness connector and A/C FUSE 10A
      • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.