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Home >> Buick >> 2011 >> Lucerne Super >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Controls And Fuel - 4.6L - Repair Instructions >> Repair Instructions >> Engine Control Module Replacement >> Installation Procedure
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Installation Procedure

NOTE:

Inspect the following areas prior to installing the ECM:

  • No debris in the air filter/ECM housing assembly, or the MAF/IAT sensor inlet screen that may distort the air flow.
  • No signs of damage to the air filter/ECM housing assembly, or the intake air duct. If a problem is found, replace the components as necessary.
    Fig 1: Identifying Air Cleaner Lower Housing
    GM1664479Courtesy of GENERAL MOTORS COMPANY
  1. Install the ECM to the lower air cleaner housing.
  2. Install the engine harness electrical connectors to the ECM.
  3. Engage the engine harness electrical connector lever locks at the ECM.
    4. Fig 2: Identifying Air Cleaner Upper Housing
    GM1670787Courtesy of GENERAL MOTORS COMPANY
  4. Install the air cleaner upper housing.
  5. Engage the upper housing front tabs to the lower housing.
  6. Engage the lower housing clips (1).
    7. Fig 3: View Of Air Cleaner Outlet Duct To Throttle Body
    GM1670790Courtesy of GENERAL MOTORS COMPANY
    NOTE:

    Properly install the air cleaner outlet duct to the throttle body. An improperly installed, distorted, or damaged air duct may cause a DTC to set.

  7. Install the air cleaner outlet duct to the throttle body.
    8. CAUTION:

    Refer to Fastener Caution .

  8. Tighten the air cleaner outlet duct clamp at the throttle body.

    Tighten 

    Tighten the clamp to 3 N.m (27 lb in).

    9. Fig 4: Identifying Secondary AIR Pump Inlet Tube/Hose
    GM1665331Courtesy of GENERAL MOTORS COMPANY
  9. Connect the AIR pump inlet tube quick connect fitting to the air cleaner upper housing. Refer to Plastic Collar Quick Connect Fitting Service .
    10. Fig 5: Identifying PCV Fresh Air Tube
    GM1661022Courtesy of GENERAL MOTORS COMPANY
  10. Connect the PCV fresh air tube quick connect fitting to the air duct. Refer to Plastic Collar Quick Connect Fitting Service .
    11. Fig 6: Locating MAF/IAT Sensor Connector
    GM1670786Courtesy of GENERAL MOTORS COMPANY
  11. Connect the engine harness electrical connector to the MAF/IAT sensor.
  12. Connect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
  13. Program the ECM. Refer to Control Module References .
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