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Home >> Pontiac >> 2006 >> Solstice Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 2.4L - DTC P0010 To DTC P0340 >> DTC P0230 >> Circuit/System Testing

Circuit/System Testing

  1. With the ignition OFF, remove the fuel pump relay from the underhood electrical center.
  2. With the ignition ON, engine OFF, probe the control circuit of the fuel pump relay with a test lamp that is connected to a good ground. Command the fuel pump relay ON and OFF with a scan tool. The test lamp should turn ON and OFF with each command.
    • If the test lamp does not turn ON and OFF, test for an open, high resistance, or a short to ground in the fuel pump relay control circuit, an intermittent or a poor connection at the engine control module (ECM) or a faulty ECM.
    • If the test lamp remains illuminated with each command, test for a short to voltage in the control circuit of the fuel pump relay, an intermittent or a poor connection at the ECM, or a faulty ECM.
  3. Connect a test lamp between the control circuit of the fuel pump relay and the ground circuit of the fuel pump relay. Command the fuel pump relay ON and OFF with a scan tool.
    • If the test lamp does not turn ON and OFF, repair the open or the high resistance in the ground circuit of the fuel pump relay.
    • If the test lamp does turn ON and OFF, test for an intermittent and for a poor connection at the fuel pump relay, or a faulty fuel pump relay.
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