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HOMESERVICE MANUALSHYUNDAI2022IONIQ PLUG-IN HYBRID SELREPAIR AND DIAGNOSISENGINE MECHANICALFUEL SYSTEMFUEL DELIVERY SYSTEM (PHEV)FUEL PUMP CONTROL MODULE (FPCM)DESCRIPTION AND OPERATIONOPERATION
2022 Hyundai Ioniq Plug-In Hybrid SEL

Description And Operation: Operation

2022 Hyundai Ioniq Plug-In Hybrid SELSECTION Operation
G13563146Courtesy of HYUNDAI MOTOR AMERICA
  1. The ECM provides target fuel pressure information to the FPCM via CAN network.
  2. The FPS provides the FPCM with actual pressure information of the low pressure fuel line between the low and high pressure fuel pumps, and the FPCM forwards the information to the ECM. Also, the FPCM diagnoses faults in the FPCM, fuel pump motor and FPS and then provides the diagnosis information to the ECM.
  3. The FPCM compares the actual fuel pressure information measured by the FPS with the target fuel pressure information provided by the ECM and controls the voltage that is provided to the low pressure fuel pump motor. The FPCM keeps regulating fuel flow rate by controlling the low pressure fuel pump, depending on engine speed (rpm) and vehicle loads.
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.