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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 >> Resistance measurement with matching resistor

Resistance measurement with matching resistor

  1. Ignition "OFF" and disconnect the battery and wait about four minutes.
  2. Make sure all modules are properly connected.
  3. Measure resistance between Pin No. 13 (CAN High) and Pin No. 14 (CAN Low) terminal of IGPM.

    Specification  : Approx. 60Ω

  4. Is the measured value within specification?

    YES 

    • Check each module connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair " procedure.

    NO 

    • If the measured value is out of specification, Go to "CAN resistor inspection " procedure.

      * If the measured value is approx. 0Ω, then check for short CAN communication line.

      * If the measured value is approx. 120Ω, then check for open CAN communication line of control module with resistor.

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