OEM 2008 Cadillac STS Engine Control Module

2008 Cadillac STS Parts Questions & Experts Answers

• Q: How to service the Engine Control Module (ECM) on 2008 Cadillac STS?

  A: Service of the Engine Control Module (ECM) requires either replacemnt of the ecm or programming electrically erasable programmable read-only memory (EEPROM). Check that the new ecm matches the specifications before taking out the damaged unit for installation of the service ecm. You need to switch off the ignition before working with any control module connectors and power connections to stop damaging their internal components. Touching the pins or soldered components of the control module is prohibited to protect it from electrostatic discharge. Also avoid having the metal module case near battery voltage. The debris surrounding control module connector surfaces must be removed before spot-checking gaskets for proper installation to block contaminants from entering the system. The replacement control module must be programmed after installation but recording the original engine oil life and automatic transmission fluid life remains essential since failing to do so will initialize oil service at 5000 km (3,000 mi) and 83000 km (50,000 mi). The first step involves obtaining fluid lives with a scan tool before cutting off the negative Battery Cable for removal. Open the engine wiring harness connectors on the ecm and remove the ecm by unscrewing its bracket retainers. To remove the ecm bracket users should first depress its locking tabs. The installation process requires users to first lower the ecm bracket onto the locking tabs before fitting the ecm into its place and confirming the retainer connection. Attach the wiring harness connectors to the ecm while using the provided locking mechanisms before reattaching the negative cable to the battery. Programming may be necessary after which you must press the ignition button for at least 5 seconds post programming.