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Secondary air injection pump not working. Checked voltage on it and got 2.81 volts. put 12 volts on it and pump worked

2000 Lincoln LS V6... OBD code po0411

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Here is the Test procedure:-
1. Access the Air Injection Reaction (AIR) solid state relay, check for battery voltage on the Red/Black wire from fuse F117 and the Green/Black wire from fuse F111 and a good ground on the Black/Green wire. If OK, backprobe the Brown/Yellow wire with a jumper wire.

2. With the relay connected, ground the Brown/Yellow wire and verify that the AIR pump runs. If the pump does not run, leave the Brown/Yellow wire grounded, and check for battery voltage out of the relay on the Red/Black wire. If there is no voltage out the Red/Black wire, replace the relay. If there is battery voltage on the Black/Red wire, locate the AIR pump and verify that the Red/Yellow wire at the pump has battery voltage from the relay, and check for a good ground on the Black/Yellow wire at the pump. If battery voltage is present on the Red/Yellow wire, and the Black wire on the pump is a good ground, but the pump doesn't run, replace the AIR pump.

3. If the AIR pump runs, monitor the Oxygen (O2) sensor operation in closed loop before and after energizing the AIR pump, by grounding the AIR relay Brown/Yellow wire, to verify that both O2 sensors drop to lean readings within seconds of commanding the air pump on.

4. If neither O2 sensor signal goes lean after the AIR pump is commanded on, either the AIR pump has failed or has low output, or the AIR vacuum solenoid may have a functional (mechanical) problem that prevents it from allowing a vacuum signal to either of the switching valves. Locate the AIR vacuum solenoid and verify that it also has power on the Green/Blue wire and that the Brown/Red wire is grounded when the Brown/Yellow wire at the relay is grounded (this is the same wire). Check for good manifold vacuum into the solenoid, and check for vacuum out of the solenoid when the solenoid Brown/Red wire is grounded with the engine running. Check to make sure that the vacuum from the solenoid is reaching the AIR switching valves, and that the switching valves open when vacuum is applied. If all OK, the AIR pump is likely not pumping sufficient air.

5. If only one O2 sensor reading drops lean quickly, check for any problems with the exhaust on that side such as exhaust leaks or restrictions, or a faulty O2 sensor. Repair as needed and recheck operation. Tech tips The wire colors are different at the relay and the air pump and the diverter valve solenoid because of splices between the shared components. Due the location of the components, water ingestion into the air pump has been a problem. 2000 PCED On Board Diagnostics II SECTION 5: Pinpoint Tests Procedure revision date: 05/02/2003 HM: Secondary Air Injection (AIR) System HM: Introduction HM2.GO to HM6.HM3.REPAIR open circuit.HM4.REPAIR short circuit.HM5.REPLACE AIR bypass solenoid.HM11.

All others: GO to HM18.REPLACE solid state relay.HM8 to check electric AIR pump. RECONNECT solid state relay.REPAIR open circuit. RECONNECT solid state relay and fuse.HM8.DRAIN all water from hoses or REPLACE damaged parts. CAUTION: Operating the air pump in Output Test Mode for a period greater than two minutes may overheat and damage the air pump.

  • Disconnect the air hose from the air pump outlet.
  • Access Output Test Mode
  • Command the air pump ON.
  • Monitor the airflow at the air pump outlet.
  • Command the air pump OFF.
  • Is airflow present at the air pump outlet?
    Yes No GO to HM19. GO to HM9. HM10.GO to HM15.HM12.GO to HM32. CAUTION: Caution must be observed while performing this test.Note: On a two-valve system, make sure that air is flowing from both valves.
  • Reconnect vacuum control line.
  • Disconnect air tube from AIR diverter valve(s).
  • Inspect AIR diverter valve(s) outlets for damage from hot exhaust gases. Repair as necessary.
  • Key on, engine off.
  • Enter Output Test Mode.
  • Is air present from the AIR diverter valve(s)?
    Yes No KEY OFF. Repair the exhaust tubes from the AIR diverter valve to the exhaust manifold(s). If OK, GO to HM13. KEY OFF. REPLACE hose from electric AIR pump to AIR diverter valve. If OK, REPLACE the appropriate AIR diverter valve(s). HM14.REPAIR as necessary.Z1.REPAIR as necessary.HM17.GO to HM16.HM22.REPAIR open circuit.HM19.DRAIN all water from air hose. REPLACE or RE-ORIENT hose as appropriate. GO toHM19.Z2.

    If no problem is found, REPLACE PCM. (REFER to Section 2, Flash Electrically Erasable Programmable Read Only Memory (EEPROM).)REPLACE solid state relay.HM6.

    Testing is complete.

    All others, GO to HM11.HM21.GO to HM27.HM22.For LS6,GO to B5.

    All others : REPAIR open VPWR circuit between the solid state relay and Electronic Engine Control power relay.HM26. REMAIN in output test mode.If DTC P0411 is present, REPLACE electric AIR pump. GO to HM23. REMAIN in output test mode.Flash Electrically Erasable Programmable Read Only Memory (EEPROM).)GO to HM24.HM25.REPAIR the circuit in question.Flash Electrically Erasable Programmable Read Only Memory (EEPROM).)REPAIR open EAIR circuit.HM29.REPAIR open circuit.HM30.REPLACE electric AIR pump.HM31.Flash Electrically Erasable Programmable Read Only Memory (EEPROM).)HM33.REPLACE the vacuum line connecting the AIR bypass solenoid to AIR diverter valve(s).HM34.Key off. GO to HM35.Z2.REPLACE AIR bypass solenoid.HM36.REPLACE AIR bypass solenoid.HM37.REPAIR open VPWR circuit (and dedicated fuse on LS6).HM38.REPAIR open EAIR circuit.HM39.REPAIR short to ground.Flash Electrically Erasable Programmable Read Only Memory (EEPROM).)REPAIR short to power.

    Posted on Mar 30, 2015

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    • Lincoln Master
    • 880 Answers

    The air injection pump has a relay in the power distribution box that is controlled by the computer. it gets 12 volts when the relay is closed. the relay can be bad

    Posted on Mar 30, 2015

    • Hilo Hill
      Hilo Hill Apr 03, 2015

      I know the fuse but which one is the relay?

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    • Expert
    • 28 Answers

    Check all parts

    Posted on Apr 03, 2015

    • Hilo Hill
      Hilo Hill Apr 03, 2015

      Why that answer? Omg

    • Jerry Hirschinger Apr 03, 2015

      Give him a "Not Helpful" vote!

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    SOURCE: OBD Code P0410, Secondary Air Injection System.

    Usual causes are air in air pump, solenoid malfunction, the secondary air check valve, or loss of power to pump solenoid. Pinched, loose, cracked, or broken hoses can also cause this code.

    Posted on Oct 18, 2010

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