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Home › Pontiac › 2008 › G5 Base, Standard › Repair and Diagnosis › Engine Performance › System › Engine Control System & Fuel System - 2.2L (L61) - DTC P0016 To DTC P0411 › DTC P0411 › Circuit/System Testing

Circuit/System Testing

Secondary Air Injection Pump Malfunction

  1. Ignition OFF, disconnect the AIR pump relay.
  2. Ignition ON, verify that a test lamp does not illuminate between the controlled output circuit terminal and ground.
    • If the test lamp illuminates, test the controlled output circuit for a short to voltage.
  3. Verify that a test lamp illuminates between the AIR pump relay coil ignition circuit terminal and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal and the ignition circuit fuse is open, replace the AIR pump relay.
  4. Verify that a test lamp illuminates between the AIR pump relay switch B+ circuit terminal and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the controlled output circuit for a short to ground.
  5. Ignition OFF, disconnect the harness connector at the AIR pump.
  6. Test for less than 2 ohms between the AIR pump ground circuit terminal B and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  7. Connect the harness connector at the AIR pump.
  8. . Connect the J 36169-HD  with a 40A fuse between the AIR pump relay switch B+ circuit terminal and the controlled output circuit terminal. Verify the AIR pump is activated.
    • If the AIR pump does not activate, test the controlled output circuit for an open/high resistance. If the circuit tests normal, test or replace the AIR pump.
  9. Remove the J 36169-HD  .
  10. Connect a test lamp between the AIR pump relay coil ignition circuit terminal and the AIR pump relay control circuit terminal.
  11. . Ignition ON, command the AIR pump relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the AIR pump relay control circuit for a short to ground. If the circuit tests normal, replace the ECM.
    • If the test lamp is always OFF, test the AIR pump relay control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
  12. If all circuits test normal, replace the air pump relay.

Secondary Air Injection Solenoid Malfunction

  1. Ignition OFF, disconnect the AIR solenoid relay.
  2. Ignition ON, verify that a test lamp does not illuminate between the controlled output circuit terminal and ground.
    • If the test lamp illuminates, test the controlled output circuit for a short to voltage.
  3. Verify that a test lamp illuminates between the AIR solenoid relay coil ignition circuit terminal and ground.
    • If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance.
  4. Verify that a test lamp illuminates between the AIR solenoid relay switch B+ circuit terminal and ground.
    • If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal and the B+ circuit fuse is open, test the controlled output circuit for a short to ground.
  5. Ignition OFF, disconnect the harness connector at the AIR solenoid valve.
  6. Test for less than 2 ohms between the AIR solenoid ground circuit terminal 4 and ground.
    • If greater than the specified range, test the ground circuit for an open/high resistance.
  7. Connect the harness connector at the AIR solenoid valve.
  8. Connect a 10A fused jumper wire between the AIR solenoid relay switch B+ circuit terminal and the controlled output circuit terminal. Verify the AIR solenoid valve activates.
    • If the AIR solenoid valve does not activate, test the controlled output circuit for an open/high resistance. If the circuit tests normal, test or replace the AIR solenoid valve.
  9. Remove the 10A fused jumper wire.
  10. Connect a test lamp between the AIR solenoid relay coil ignition circuit terminal and the relay coil control circuit terminal.
  11. Ignition ON, command the AIR solenoid relay ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
    • If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the ECM.
    • If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
  12. If all circuits test normal, replace the AIR solenoid relay.

Secondary Air Injection System Pressure Low

  1. Engine running, inspect for exhaust leaks between the AIR solenoid valve and the catalytic converter.
    • If an exhaust leak is detected, repair as necessary.
  2. Ignition OFF, disconnect the AIR pump relay.
  3. Engine running, connect the J 36169-HD  with a 40A fuse between the AIR pump relay switch B+ circuit terminal and the controlled output circuit terminal. Verify the AIR Pressure Sensor parameter is not 20-25 kPa above BARO.
    • If 20-25 kPa above BARO, replace the AIR pump relay.
  4. Ignition OFF, remove the fused jumper wire and connect the AIR pump relay.
  5. Remove the air inlet hose at the AIR pump.
  6. Engine running, command the AIR system ON while observing the AIR Pressure Sensor parameter. Verify the reading is not 8-10 kPa above BARO.
    • If 8-10 kPa above BARO, the AIR pump inlet hoses/pipes are restricted. Remove the restriction or replace the inlet hose/pipe.
  7. Ignition OFF, disconnect the hose at the AIR pump outlet.
  8. Disconnect the hose at the AIR solenoid valve inlet.
  9. Install a length of standard 1 inch I.D. (25.4 mm) hose from the AIR pump outlet to the AIR solenoid valve inlet.
  10. Engine running, command the AIR system ON while observing the AIR Pressure Sensor parameter. Verify the reading is not 8-10 kPa above BARO.
    • If 8-10 kPa above BARO, test/inspect the AIR pump outlet hoses/pipes for leaks or restrictions.
  11. Test all AIR pump wiring and connections for less than 2 ohms. If the wiring and connections test normal, replace the AIR pump.

Secondary Air Injection System Pressure High

  1. Ignition OFF, remove the AIR solenoid valve.
  2. Connect the AIR pump outlet pipe/hose to the AIR solenoid valve.
  3. Connect the AIR solenoid harness at the AIR solenoid valve.
  4. Engine running, command the AIR system ON while observing the AIR Pressure Sensor parameter. The reading should be less than 11 kPa above BARO.
    • If greater than the specified value, replace the AIR solenoid valve.
  5. Inspect the AIR solenoid valve gaskets for proper alignment. If normal, test/inspect the cylinder head or exhaust manifold for a restriction.
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