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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) (PHEV) >> DTC U0456-00: Invalid Data Received From Coolant Temperature Control Module >> Wiring Inspection >> Module Circuit Inspection >> Power Circuit Inspection

Power Circuit Inspection

  1. Ignition "OFF"
  2. Refer to ELECTRIC WATER PUMP (EWP) and disconnect EEWP connector.
  3. Ignition "ON"
  4. Measure voltage between Pin No. 7 (Power) terminal of EEWP harness connector and chassis ground.
  5. Measure voltage between Pin No. 2 (ON/Start Input) terminal of EEWP harness connector and chassis ground.

    Specification  : B+

  6. Is measured value within specification?

    YES 

    NO 

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