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Home › Pontiac › 2010 › G5 Base, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls And Fuel - 2.2L - DTC P0351 To DTC P2544 › DTC P2430-P2433 › Circuit/System Testing

Circuit/System Testing

    NOTE: The Secondary Air Pressure sensor is an integral part of the Secondary Air Check Valve.
  1. Ignition OFF, disconnect the harness connector at the Secondary Air Injection Pressure Sensor.
  2. Ignition OFF for 2 minutes and the scan tool powered OFF, test for less than 5 Ω between the low reference circuit terminal 1 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 V between the 5 V reference circuit terminal 3 and ground.
    • If less than the specified range, test the 5 V 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 V reference circuit for a short to voltage. If the circuit tests normal, replace the ECM.
  4. Verify the scan tool Secondary Air Injection Pressure Sensor voltage parameter is less than 0.5 V.
    • If greater than the specified range, test the signal circuit terminal 2 for a short to voltage. If the circuit tests normal, replace the ECM.
  5. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the 5 V reference circuit terminal 3. Verify the scan tool Secondary Air Injection Pressure Sensor voltage parameter is greater than 4.8 V.
    • If less than the specified range, test the signal circuit for short to ground or an open/high resistance. If the circuit tests normal, replace the ECM.
  6. If all circuits test normal, test or replace the Secondary Air Injection Pressure sensor.
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