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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 P0270 Cylinder4-Injector Circuit Low >> Power Circuit Inspection

Power Circuit Inspection

  1. Ignition "OFF"
  2. Disconnect INJ connector.
  3. Ignition "ON" & Engine "OFF"
  4. Measure voltage between terminal 1 of sensor harness connector and chassis ground.

    Specification: approximately B+

    Fig 1: Measuring Voltage Between Terminal 1 Of Sensor Harness Connector And Chassis Ground
    G03851862Courtesy of HYUNDAI MOTOR CO.
  5. Is measure voltage within Specification?

    YES 

    NO 

    • Open circuit or short circuit to chassis ground between INJ harness connector and control relay.
    • Repair as necessary and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
      NOTE:
      1. In case the voltage between terminal 1 of injector and terminal 27, 6, 7 and 47 of PCM is 1V respectively.
        • Suspect area: Open or short circuit of power line from injector to PCM.
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