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Home >> Kia >> 2017 >> Optima Plug-In Hybrid EX >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System Diagnosis (2 Of 3) (PHEV) >> DTC P1233-00: Low Pressure Fuel System - High Deviation Between Target And Current Pressure >> Wiring Inspection >> Fuel Pump Control Module Circuit Inspection >> Ground Circuit Inspection

Ground Circuit Inspection

  1. Ignition "OFF"
  2. Disconnect Battery (-) terminal.
  3. Refer to FUEL PUMP CONTROL MODULE (FPCM) and disconnect Fuel Control Module connector.
  4. Measure resistance between Pin No. 9 (Ground) terminal of Fuel Control Module harness connector and chassis ground.

    Specification:  Approx. below 1Ω

  5. Is measured value within specification?

    YES 

    • Go to "Fuel Pressure Sensor Circuit Inspection" procedure below.

    NO 

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