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Home › Saturn › 2007 › Sky Red Line, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls & Fuel - 2.0L - DTC P0010 To P0304 › DTC P0234 or P0299 › Circuit/System Testing

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector at the boost pressure sensor.
  2. Ignition OFF for 90 seconds, test for less than 5 ohms of resistance between the low reference circuit terminal A and ground.
    • If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal C and ground.
    • If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
    • If greater than the specified range, test the 5-volt reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Verify the scan tool Boost Pressure Sensor parameter is greater than 275 kPa.
    • If less than the specified range, test the signal circuit terminal D for a short to ground. If the circuit tests normal, replace the ECM.
  5. Install a 3A fused jumper wire between the signal circuit terminal D and the low reference circuit terminal A. Verify the scan tool Boost Pressure Sensor parameter is less than 1 kPa.
    • If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
  6. If the circuits test normal, replace the boost pressure sensor.
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