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| Engine Control Module
Caution:
| • | Turn 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, jump leads, 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. |
Procedure
- Record the current Engine Oil Life percentage, and use a scan tool to update the NEW ECM, if replacing.
- Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
- Disconnect the electrical connectors.
- If replacing ECM, reprogram the ECM. Refer to Control Module References
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