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Home >> Chevrolet >> 2004 >> Optra (CANADA) L4-2.0L >> Repair and Diagnosis >> Powertrain Management >> Relays and Modules - Powertrain Management >> Relays and Modules - Computers and Control Systems >> Engine Control Module >> Service and Repair
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Engine Control Module: Service and Repair




Engine Control Module Replacement

Removal Procedure





Caution: Refer to Battery Disconnect Caution Battery Disconnect Caution.

1. Disconnect the negative battery cable.
2. Remove the air intake tube and resonator.
3. Disconnect the engine control module (ECM) connectors from the ECM.
4. Remove the ECM.

Installation Procedure




1. Connect the ECM connectors to the ECM.
2. Align the ECM into the mounting base.
3. Snap the ECM into its mounting base.
4. Install the ECM trim locks.
5. Connect the negative battery cable.
6. Perform a crankshaft position (CKP) system variation learning procedure and the idle learn procedure. Refer to Crankshaft Position System Variation Learn Testing and Inspection and Idle Learn Testing and Inspection.

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