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Home >> Hyundai >> 2014 >> Equus Ultimate >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Control System Diagnosis (3 Of 3) >> DTC U0109: Lost Communication With Fuel Pump Control Module >> DTC Information >> DTC Detecting Condition
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DTC Information: DTC Detecting Condition

Item Detecting Condition Possible cause
DTC Strategy
  • CAN communication status check
  1. FPCM faulty
  2. CAN communication line between ECM and FPCM
EnableConditions
  • B+ is higher than 10.8V
  • IG "ON" Time greater than 0.5sec.
Threshold value
  • Duration of communication lost with FPCM is higher than 4 sec
Diagnosis Time
  • Continuous
MIL On Condition
  • 2 driving cycle
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