2009 Chevrolet Cobalt Owner's Manual - Page 163

Region A Gage and Speedometer Displays Change the information displayed in Region A by turning the knob either clockwise or counterclockwise. The available gages are: BOOST: Displays positive boost pressure as determined by the manifold air pressure (MAP) sensor. AIR/FUEL RATIO: Displays the mass ratio of air to fuel. CAM PHASER ANGLES: Displays orientation of the intake and exhaust cam shafts relative to their park positions as commanded by the engine control module. OVERLAP represents the total distance the intake and exhaust cam shafts have phased. SPARK ADVANCE/ KNOCK RETARD: The spark advance gage displays ignition timing. Knock retard indicates the amount of ignition delay to reduce spark knock. ENGINE POWER & TORQUE: Displayed engine power and torque are engine flywheel output values calculated by the engine control module. These values are approximate and may change with the air conditioning load, generator output, air temperature, air pressure, and fuel octane. RPD Screen Example US Version Shown, Canada Similar (French Display Currently Not Available) The RPD screen displays two divided areas (A, B) of information called Regions. Advance through Region A screens to show various gages and speedometer displays. Advance through Region B screens to show digital readouts and indicator information. The position of these regions can be reversed. See the SETUP MENU for more information. When the ignition is turned off and then back on, the RPD shows the last screen displayed. 3-39