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Home >> Hyundai >> 2004 >> Accent Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (1 Of 2) >> DTC Troubleshooting Procedures >> DTC P0230: Fuel Pump Circuit Malfunction >> Control Circuit Inspection

Control Circuit Inspection

  1. Ignition "OFF"
  2. Connect fuel pump relay and PCM connector.
  3. Ignition "ON" & Engine "OFF"
  4. Measure voltage between terminal 70 of ECM harness connector and chassis ground.

    Specification: approximately B+

    Fig 1: Measuring Voltage Between Terminal 70 Of ECM Harness Connector And Chassis Ground
    G03851829Courtesy of HYUNDAI MOTOR CO.
  5. Is measure voltage within Specification?

    YES 

    NO 

    • Short circuit to chassis ground between fuel pump relay signal circuit and PCM harness connector.
    • Open circuit between fuel pump relay signal circuit and PCM harness connector.
    • Open circuit pump relay.
    • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      NOTE:
      1. In case the voltage at terminal 70 of PCM is 0V.
        • Possible cause: Open circuit between fuel pump relay and ECM, or open coil in fuel pump relay
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