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Home >> Kia >> 2016 >> Cadenza Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC U0109: Lost Communication With Fuel Pump Control Module >> Wiring Inspection >> Signal Circuit Inspection
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Signal Circuit Inspection

■ Check open in harness 

  1. IG "OFF" and disconnect ECM (PCM) and FPCM connector.
  2. Check resistance between CAN-HIGH terminal of ECM (PCM) harness Connector and CAN-HIGH terminal of FPCM harness connector.
  3. Check resistance between CAN-LOW terminal of ECM (PCM) harness Connector and CAN-LOW terminal of FPCM harness connector.

    Specification:  Below 1.0Ω

  4. Is the measured resistance within specification?

    YES 

    NO