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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 U0109-00: Lost Communication With Fuel Pump Control Module >> Wiring Inspection >> CAN Communication Line Inspection >> CAN Communication Line Inspection
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CAN Communication Line Inspection

  1. Ignition "ON"
  2. Measure voltage between Pin No. 13 (P-CAN High) terminal of IGPM and chassis ground.
  3. Measure voltage between Pin No. 14 (P-CAN Low) terminal of IGPM and chassis ground.

    Specification  : CAN High Voltage - Approx. 2.6V/CAN Low Voltage - Approx. 2.4V

  4. Is measured value within specification?

    YES 

    • Fault might be intermittent and caused either by poor contact in connectors or wiring harness, or it has been repaired and control module memory is not cleared yet. Thoroughly check terminal of battery, all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.
    • Repair or replace as necessary and then go to "Verification of Vehicle Repair " procedure.

    NO 

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