OEM 2008 Chevrolet HHR Engine Control Module

2008 Chevrolet HHR Parts Questions & Experts Answers

• Q: How to replace the Engine Control Module (ECM) on 2008 Chevrolet HHR?

  A: The process of Engine Control Module (ECM) replacement begins with turning off the ignition because this action safeguards the internal components during connector and power connection handling which includes the Battery Cable and control module fuse. Touching the control module metal case to battery voltage will damage it and touching the connector pins and soldered components can generate electrostatic discharge. The servicing process requires a surface cleaning of control module connector areas and a correct assessment of gaskets to stop contaminants from getting inside. The replacement module requires information about engine oil life which users must obtain through a scan tool because its default value will set to 100 percent if not programmed correctly thus demanding an oil change at 5000 km (3000 mi) from the last change. Begin the procedure by removing the negative Battery Cable and then take off the ecm/tcm cover to disconnect all ecm electrical connectors. You should remove the ecm from the underhood junction block bracket after disengaging the plastic retainer tabs. To install the new ecm users must push the component straight down until the tabs lock then connect the ecm electrical connectors and replace the ecm/tcm cover. After completing the ecm programming the final action should be reconnection of the negative Battery Cable.