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Home >> Kia >> 2016 >> Optima SX Limited >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 95 (Engine Control System Diagnosis - 1.6L (1 Of 3) - Optima (Except HEV)) >> DTC P0091: Fuel Pressure Regulator 1 Control Circuit Low >> Wiring Inspection >> Control Circuit Inspection

Control Circuit Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Ignition "OFF"
  2. Disconnect FPR connector.
  3. Ignition "ON" & ENG "OFF"
  4. Measure voltage between Pin No. 1 (Low Control), Pin No. 2 (High Control) terminal of FPR harness connector and chassis ground.

    Specification: 

    FPR Low Terminal: Approx. 0V

    FPR High Terminal: Approx. 0.8V

  5. Ignition "OFF" & Disconnect PCM connector.
  6. Measure resistance between Pin No. 1 (Low Control), Pin No. 2 (High Control) terminal of the FPR.

    Specification: 

  7. Is the measured Value within specification?

    YES 

    NO