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Home >> Saturn >> 2008 >> Astra XR, 2D Hatchback, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - DTC P000A To DTC P0365 >> DTC P009A >> Circuit/System Testing

Circuit/System Testing

  1. Verify that debris is not blocking the airflow through the front of the grille area.
  2. Verify that the port of the passenger side AAT sensor is free of debris and contamination.
  3. Ignition OFF, disconnect the harness connector at the passenger side AAT sensor.
  4. Ignition OFF for 90 seconds, test for less than 5 ohms between the low reference circuit and ground.
    • If greater than the specified range, test the low reference circuit for a high resistance. If the circuit tests normal, replace the ECM.
  5. Disconnect the ECM.
  6. Test the AAT sensor signal circuit for less than 5 ohms.
    • If greater than the specified range, test the signal circuit for a high resistance.
  7. If the circuits test normal, test or replace the AAT sensor.
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