OEM Chevrolet Cobalt Engine Control Module

Chevrolet Cobalt Engine Control Module Parts Questions & Experts Answers

• PCM
  12678511
  Q: How to replace the Engine Control Module (ECM) on Chevrolet Cobalt?

  A: Starting the procedure requires ignition shutdown to stop any potential internal module damage while servicing connectors and power lines. The metal case should never come into contact with battery voltage because this leads to damage. Sustain proper handling of the connector pins and soldered components to defend against electrostatic discharge while clearing all dirt from the control module connector faces. Checking control module connector gaskets confirms their correct position is crucial to stop external materials from entering the system. Prior to installing the new module employees need to obtain engine oil life information from a scan tool because otherwise the replacement module will initialize itself to 100% and require an oil change at 5000km (3,000mi) from the last change. The procedure starts with disconnecting the negative Battery Cable followed by Engine Control Module cover removal and seperating the body wiring harness and engine wiring harness electrical connectors from the ecm. Performing steps enables the ecm to detach from underhood junction block bracket through releasing its retaining tab. When installing the ecm users must place it on the underhood junction block bracket before they reconnect the engine wiring harness, small ecm harness connectors and negative Battery Cable and body wiring harness connector. Completion of the procedure requires installation of Engine Control Module cover followed by ecm programming.