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Home >> Genesis >> 2021 >> G70 2.0T, AWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis - 2.0L (6 Of 6) >> DTC U0109-00: Lost Communication With Fuel Pump Control Module >> Wiring Inspection >> Signal Circuit Inspection >> Check CAN Communication Line Open
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Check CAN Communication Line Open

  1. Turn "OFF" the ignition switch. Disconnect the connectors related to the CAN communication
  2. Check resistance between CAN-HIGH terminal of FPCM Connector and CAN-HIGH terminal of ECM harness connector (Measurement "A").
  3. Check resistance between CAN-LOW terminal of FPCM Connector and CAN-LOW terminal of ECM harness connector (Measurement "B").

    Specification:  0Ω

  4. Is the measured resistance within specification?

    YES 

    • Substitute with a known-good FPCM and check for proper operation. If the problem is corrected, replace FPCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

    NO 

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