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

■ Check voltage 

  1. IG "OFF". Disconnect the main relay.
  2. IG "ON"
  3. Measure the voltage between power supply terminals of main relay harness connector and chassis ground.

    Specification:  Approx. B+ (Battery Voltage)

  4. Is the measured voltage within specification?

    YES 

    • Go to "Control Circuit Inspection" procedure below.

    NO 

    • Check the fuse between battery and main relay.
    • Repair open or short to ground in power circuits. Go to "VERIFICATION OF VEHICLE REPAIR " procedure.