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Home >> Cadillac >> 2006 >> DTS 4.6 9 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - 4.6L - Introduction (2 Of 2) >> Repair Instructions >> Air Cleaner Assembly Replacement >> Removal Procedure

Removal Procedure

    Fig 1: MAF/IAT Sensor
    GM1670786Courtesy of GENERAL MOTORS CORP.
  1. Disconnect the engine harness electrical connector from the mass air flow (MAF)/intake air temperature (IAT) sensor.
    2. Fig 2: PCV Fresh Air Tube
    GM1661022Courtesy of GENERAL MOTORS CORP.
  2. Disconnect the positive crankcase ventilation (PCV) fresh air tube quick connect fitting from the air cleaner outlet duct. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
    3. Fig 3: AIR Pump Inlet Hose
    GM1665331Courtesy of GENERAL MOTORS CORP.
  3. Disconnect the secondary air injection (AIR) pump inlet hose quick connect fitting from the air cleaner. Refer to Quick Connect Fitting(s) Service (Plastic Collar) .
    4. Fig 4: Air Cleaner Outlet Duct Clamp
    GM1670790Courtesy of GENERAL MOTORS CORP.
  4. Loosen the air cleaner outlet duct clamp at the throttle body.
  5. Remove the air cleaner outlet duct from the throttle body.
    6. Fig 5: Air Cleaner Upper Housing
    GM1670787Courtesy of GENERAL MOTORS CORP.
  6. Disengage the 3 integral clips (1) on the lower housing from the upper housing.
  7. Remove the air cleaner upper housing.
    8. Fig 6: Air Cleaner Lower Housing
    GM1664479Courtesy of GENERAL MOTORS CORP.
  8. If replacing the air cleaner lower housing also, perform the following steps if not proceed to step 11.
  9. Remove the engine harness and powertrain control module (PCM) from the lower housing.
    10. Fig 7: Air Cleaner Lower Housing
    GM1674290Courtesy of GENERAL MOTORS CORP.
  10. Pull up firmly on the lower housing in order to disengage the grommets from the studs. Remove the air cleaner lower housing.
    11. Fig 8: MAF Sensor
    GM1670799Courtesy of GENERAL MOTORS CORP.
    NOTE:
    • Handle the MAF sensor carefully.
    • Do not drop the MAF sensor in order to prevent damage to the MAF sensor.
    • Do not damage the screen located on the air inlet end of the MAF.
    • Do not touch the sensing elements.
    • Do not allow solvents and lubricants to come in contact with the sensing elements.
    • Use a small amount of a soap based solution in order to aid in the installation.
  11. If replacing the air cleaner upper housing only perform the following steps, loosen the air cleaner outlet duct clamp at the MAF/IAT sensor.
  12. Remove the air cleaner outlet duct.
    13. Fig 9: MAF/IAT Sensor Bolts
    GM1670874Courtesy of GENERAL MOTORS CORP.
  13. Remove the MAF/IAT sensor bolts.
  14. Remove the MAF/IAT sensor.
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