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Engine Control Module Replacement Buick Enclave I facelift

Engine Controls and Fuel - 3.6L (Llt) - Repair Instructions: Removal & Installation 4 illustrations ~195 words

Engine Control Module Replacement

CAUTIONTurn the ignition OFF when installing or removing the control module connectors and disconnecting or reconnecting the power to the control module (battery cable, powertrain control module (PCM)/engine control module (ECM)/transaxle control module (TCM) pigtail, control module fuse, jumper cables, etc.) in order to prevent internal control module damage. Control module damage may result when the metal case contacts battery voltage. DO NOT contact the control module metal case with battery voltage when servicing a control module, using battery booster cables or when charging the vehicle battery. In order to prevent any possible electrostatic discharge damage to the control module, do no touch the connector pins or the soldered components on the circuit board. Remove any debris from around the control module connector surfaces before servicing the control module. Inspect the control module connector gaskets when diagnosing or replacing the control module. Ensure that the gaskets are installed correctly. The gaskets prevent contaminant intrusion into the control module. The replacement control module must be programmed.

Note. Before removing the engine control module (ECM), use the scan tool to capture the ECM data. This captured data will then need to be restored into the NEW ECM. Refer to Control Module References .

Scheme 2

Scheme 2: Removal Procedure
Scheme 2: Removal Procedure

Scheme 3

Scheme 3
Scheme 3

Scheme 4

Scheme 4
Scheme 4

Scheme 5

Scheme 5
Scheme 5
  1. Turn the ignition OFF.
  2. Using a scan tool, retrieve the percentage of remaining engine oil and the remaining automatic transmission fluid life. Record the remaining engine oil and the remaining automatic transmission fluid life.
  3. Disconnect the negative battery cable. Refer to «Battery Negative Cable Disconnection and Connection»(ref-610072-S36189956992014042100000) .
  4. Disconnect the engine wiring harness middle and lower electrical connectors (1) from the ECM.
  5. If also replacing the ECM bracket, remove the engine wiring harness clip (2) from the ECM bracket tab.
  6. Disconnect the engine wiring harness upper electrical connector (1) from the ECM.
  7. Gently lift up the retaining tab (1) and lift the ECM up and out of the support brackets on the ECM bracket. CAUTION: In order to prevent any possible electrostatic discharge damage to the ECM, do not touch the connector pins.
  8. If necessary, remove the ECM bracket bolts (1) and bracket.