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Home >> Kia >> 2016 >> Cadenza Base >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC P0685: ECM/PCM Power Relay Control Circuit/Open >> Wiring Inspection >> Control Circuit Inspection

Control Circuit Inspection

■ Check short in harness 

  1. IG "OFF". Disconnect the main relay and PCM connector.
  2. Measure the resistance between control terminal of main relay harness connector and chassis ground.

    Specification:  Infinite

  3. Is the measured resistance within specification?

    YES 

    • Go to "Check open in harness" procedure below.

    NO 

■ Check open in harness 

  1. IG "OFF". Disconnect the main relay and PCM connector.
  2. Measure the resistance between control terminal of main relay harness connector and main relay control terminal of PCM harness connector.

    Specification:  Approx. below 1Ω

  3. Is the measured resistance within specification?

    YES 

    NO