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Home >> Kia >> 2017 >> Rio SX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 3) >> DTC P0090: Fuel Pressure Regulator 1 Control Circuit/Open >> W/Harness Inspection >> Control Circuit Inspection

Control Circuit Inspection

Check Open or Short in FPR Circuit 

  1. IG KEY "OFF".
  2. Disconnect FPR connector.
  3. IG KEY "ON" & ENG "OFF".
  4. Measure the voltage between FPR open, FPR close terminal of FPR harness connector and chassis ground.

    Specification: 

    FPR open Terminal: Approx. 0 ~ 0.6V

    FPR close Terminal: Approx. 0.6V

    Fig 1: Measuring Voltage Between FPR Close Terminal Of FPR Harness Connector And Chassis Ground
    G11847111Courtesy of KIA MOTORS AMERICA, INC.
  5. Is the measured voltage within specification?

    YES 

    NO