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Home >> Saturn >> 2007 >> Ion Red Line >> Repair and Diagnosis >> External Pages >> Different car >> Section 170 (Engine Controls And Fuel - 2.2L - DTC P0420 To DTC P2544) >> DTC P2440 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Saturn Ion 3 and 2007 Saturn Ion 2. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the solenoid valve.
  2. Ignition ON, observe that a test lamp installed between the AIR solenoid voltage supply and the AIR solenoid ground circuit terminals is not illuminated.
    • If the test lamp is illuminated, test for a short to voltage on the AIR solenoid voltage supply circuit. If the circuit tests normal, test or replace the relay.
  3. Inspect the AIR pump inlet and outlet hoses/pipes for restrictions.
  4. Inspect the solenoid valve for leaks.
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