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Home › Genesis › 2019 › G70 2.0T Advanced, AWD › Repair and Diagnosis › Engine Performance › System › Engine Control System Diagnosis - 2.0L (4 Of 4) › DTC U0109-00: Lost Communication With Fuel Pump Control Module › Wiring Inspection › Signal Circuit Inspection › Check CAN Communication Line Open

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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