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Home >> Saturn >> 2005 >> L300 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Introduction >> Repair Instructions >> Engine Control Module (ECM) Replacement >> Removal Procedure
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Removal Procedure

    IMPORTANT: It is necessary to record the remaining engine oil life. If the replacement module is not programed with the remaining engine oil life, the engine oil life will default to 100%. If the replacement module is not programmed with the remaining engine oil life, the engine oil will need to be changed at 5000 km (3,000 mi) from the last engine oil change.
  1. Using a scan tool, retrieve the percentage of remaining engine oil. Record the remaining engine oil life.
    2. Fig 1: Removing/Installing Powertrain Control Module
    GM897188Courtesy of GENERAL MOTORS CORP.
  2. Turn the ignition OFF for at least 10 seconds.
  3. Disconnect the ECM J1 and J2 harness connectors.
  4. Remove the ECM attachment bolts and remove the ECM.
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