2009 Saab 9-3 Owner's Manual - Page 204

93_US_7carcare_MY09.fm Page 204 Tuesday, April 15, 2008 11:26 AM 204 Car care Saab Trionic engine management system, 4-cyl engine The Saab Trionic engine management system is a unique Saab development that combines sequential multiport fuel injection, electronic distributorless ignition and turbocharger boost pressure control into one system. The Trionic engine control module (ECM) monitors many different engine parameters such as: • Intake manifold pressure • Intake air temperature • Crankshaft position • Engine coolant temperature • Throttle position • The oxygen content of the exhaust gases. The ECM receives information regarding engine knocking from a sophisticated feedback function in the ignition discharge unit. By processing all of this information, the Trionic system can control fuel injector opening duration, ignition timing and turbocharger boost pressure to provide excellent engine performance while maintaining low emissions and fuel consumption. Emission control systems The systems for controlling emissions to the atmosphere require regular checking and adjustment at the intervals specified in the service program. In addition to meeting the exhaust emission regulations and thereby helping to keep the environment clean, a correctly tuned engine will also give maximum fuel economy. NOTICE The Trionic engine management system continuously monitors the operation of these systems and has on-board diagnostic capabilities (OBD II). If the Service Engine Light also known as CHECK ENGINE light in the main instrument illuminates, the Trionic ECM has detected a problem. The car will continue to operate, but performance may be diminished. You should have your car checked by a workshop as soon as possible. We recommend that you contact a Saab dealer. WARNING Engine exhaust, some of its constituents, and certain vehicle components contain or emit chemicals known to the State of California to cause cancer and birth defects and reproductive harm. In addition, certain fluids contained in vehicles and certain products of component wear contain or emit chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.