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Home >> Pontiac >> 2009 >> G3 Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - 1.6L (LXV) >> Diagnostic Information and Procedures >> DTC P0230 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, disconnect the fuel pump relay.
  2. Verify a test lamp illuminates between the relay ground circuit terminal 85 and B+.
    • If the test lamp does illuminate, repair the ground circuit for an open/high resistance.
  3. Connect a test lamp between the control circuit terminal 86 and ground.
  4. Command the fuel pump relay ON with a scan tool. The test lamp should turn ON and OFF with each command.
    • If the test lamp is always ON, test the control circuit for a short to voltage. If circuit tests normal, replace the ECM.
    • If the test lamp is always OFF, test the control circuit for a short to ground, or an open/high resistance. If circuit tests normal, replace the ECM.
  5. If all circuits test normal, test or replace the fuel pump relay.
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