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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1988 (Engine Controls And Fuel - 2.4L - DTC P0010 To DTC P0315) >> DTC P0230 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Repair all U-codes before performing this diagnostic.
  1. Ignition OFF, disconnect the harness connector at the FPCM.
  2. Install a test lamp between the fuel pump control circuit terminal 13 and ground. Verify the test lamp turns ON and OFF as the ignition is turned ON.
    • If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, verify that a test lamp does not stay illuminated between the fuel pump control circuit terminal 13 and ground.
    • If the test lamp stays illuminated, test the control circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. If all circuits test normal, test or replace the FPCM.
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