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Home >> Hummer >> 2010 >> H3 Base, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> Engine Controls And Fuel - 3.7L - DTC P0335 To DTC P1381 >> DTC P0411 >> Circuit/System Testing
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Circuit/System Testing

  1. Ignition OFF, remove the Secondary Air Injection Pump Relay.
  2. Verify that a test lamp illuminates between the Secondary Air Injection Pump Relay switch B+ circuit terminal 30 and ground.
    • If the test lamp does not illuminate, test the ignition circuit for an open/high resistance. If the circuit tests normal and the relay switch ignition circuit fuse is open, test the controlled output circuit terminal 87 for a short to ground. If the circuit tests normal replace the Secondary Air Injection Pump.
  3. Connect the J-36169-HD:  Fused Jumper with a 50 A fuse between the AIR pump relay switch B+ circuit terminal 30 and the controlled output circuit terminal 87. The Secondary Air Injection Pump should turn ON.
    • If the Secondary Air Injection Pump does not activate, test the controlled output circuit, and the AIR pump ground circuit, for an open/high resistance. If the circuits test normal, test or replace the Secondary Air Injection Pump.
  4. Inspect the AIR system for the following conditions:
    • Hoses/pipes for a restriction or blockage
    • Hoses/pipes for being disconnected
    • Plugged AIR pressure sensor port
    • Damaged AIR injection check valve
    • If a condition is located, repair as necessary.
    • If a condition is not located, and the AIR pump operates with no pressure change, replace the Secondary Air Injection Pump.
  5. If all circuits test normal, replace the Secondary Air Injection Pump Relay.
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