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Home >> Saturn >> 2008 >> Astra XE, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls And Fuel - Introduction (2 Of 2) >> Repair Instructions >> Engine Control Module Replacement >> Removal Procedure
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Removal Procedure

    IMPORTANT:
    • When returning a replaced control unit, do not clear the fault memory.
    • The security code must be reset using Tech 2 when replacing or interchanging the engine control module (before removal).
  1. Open the hood.
  2. Read out control unit data with a Tech 2. Refer to Diagnostic System Check - Vehicle .
    3. CAUTION: Refer to Battery Disconnect Caution .
    IMPORTANT: The battery must not be disconnected until all consumers (e.g. fan) have ceased operation. However, a minimum waiting time of 30 seconds must be observed.
  3. Disconnect the battery.
    • Remove the ground connection from the ground terminal.
    • Loosen the nut.
    4. Fig 1: View Of Wiring Harness Plugs, Ground Cable And Bolts
    GM1945806Courtesy of GENERAL MOTORS CORP.
  4. Remove the wiring harness from the engine control module (ECM).

    Disconnect the 2 wiring harness plugs (1).

  5. Remove the ground cable (2) from the ECM.

    Remove the bolt.

  6. Remove the ECM.

    Remove the 4 bolts (3).

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