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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transaxle System Diagnosis (PHEV) >> DTC U0293: Lost Communication With Hybrid Powertrain Control Module >> Wiring Inspection >> Module Circuit Inspection >> Ground Circuit Inspection
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Ground Circuit Inspection

  1. Ignition "OFF".
  2. Disconnect Battery (-) terminal.
  3. Refer to HYBRID POWER CONTROL UNIT (HPCU) and disconnect HPCU connector.
  4. Measure resistance between Pin No. 1, 2, 3 (Ground) terminal of HPCU harness connector and chassis ground.

    Specification  : Approx. below 1Ω

  5. Is the measured value within specification?

    YES 

    NO