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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1991 (Engine Controls And Fuel - 3.6L (LCS) - DTC P0192 To DTC P0629) >> DTC P0326, P0327, P0328, P0331, P0332, or P0333 >> 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.
  1. Ignition OFF, open the hood to disable the Auto-Stop function.
  2. Ignition ON, verify the scan tool hood position parameter displays Open.
    • If the hood position does not display Open, refer to DTC P254F .
  3. Ignition OFF, disconnect the harness connector at the appropriate KS.
  4. Ignition ON, test for 2-3 V between the signal circuit terminal 1 and ground.
    • If less than the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuits/connections test normal, replace the ECM.
    • If greater than the specified range, test the signal circuit for a short to voltage. If the circuits/connections test normal, replace the ECM.
  5. Test for 2-3 V between the low reference circuit terminal 2 and ground.
    • If less than the specified range, test the low reference circuit for a short to ground or an open/high resistance. If the circuits/connections test normal, replace the ECM.
    • If greater than the specified range, test the low reference circuit for a short to voltage. If the circuits/connections test normal, replace the ECM.
  6. If all circuits/connections test normal, test or replace the KS sensor.
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