Cobalt L4-2.4L (2007)
Driver/Vehicle Information Display: Description and Operation
Driver Information Center (DIC) Description and Operation
The driver information center (DIC) displays important vehicle information when it first powers up. The DIC is also used to display Odometer and
Outside Air Temperature when other important vehicle information is not being displayed. The DIC switches are hardwired to and read by the instrument
panel cluster (IPC). The IPC provides power to the DIC switches via the IPC ignition 1 voltage circuit fused in the body control module (BCM). The
BCM is responsible for driving and processing the DIC display through GMLAN serial data. The BCM is responsible for reading the outside air
temperature (OAT) and season odometer. The outside air temperature and season odometer is transmitted to the IPC over GMLAN for display in the
DIC. The OAT data is transmitted in degrees Celsius and the cluster is responsible for converting the outside air temperature (OAT) to Fahrenheit.
There are 2 DIC buttons on the instrument panel cluster (IPC):
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INFO
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SET/RESET
The 2 DIC buttons however provide 3 switch functions. Pressing the INFO and SET/RESET button at the same time provides the MENU switch
function.
INFO
The INFO button is used in order to navigate through the following driver information center (DIC) information modes:
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AV VEHICLE SPEED
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AV FUEL ECON
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COOLANT TEMPERATURE
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FUEL RANGE
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OIL LIFE MONITOR
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TRIP ODOMETER A
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TRIP ODOMETER B
Other instrument panel cluster (IPC) information displayed in the DIC are Season odometer and Outside Air Temp.
AV VEHICLE SPEED
Average speed is calculated using the equation: Average Speed = Distance/Ignition On
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Distance = The accumulated distance travelled since the last reset of this value
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Ignition On = The accumulated ignition on time since the last reset of this value
Ignition on time is measured from the time that the ignition is turned ON to the time when the ignition is turned OFF. The value of this mode is retained
during ignition OFF. Press and hold the SET/RESET button on the DIC for 1 second in order to reset the average speed display.
AV FUEL ECON
Average fuel economy is calculated using the equation: AFE = Distance/Fuel
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Distance = The accumulated distance travelled since the last reset of this value
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Fuel = The accumulated fuel consumption since the last reset of this value
The DIC receives a serial data message from the body control module (BCM) regarding fuel usage information. The value of this mode is retained
during ignition OFF and can be changed between English units and metric units. Press and hold the SET?RESET button on the DIC switch for 1 second
in order to reset the ECON display.
COOLANT TEMPERATURE
The DIC receives GMLAN serial data message from the BCM requesting the display of the coolant temperature. The coolant temperature is sent to the
BCM as determined by the powertrain control module (PCM)/engine control module (ECM) via GMLAN serial data message.
FUEL RANGE
This message indicates the estimated distance that the vehicle can travel under the current fuel economy and fuel level conditions since the last reset of
the value. Fuel Range is calculated using the equation: Fuel Range = Distance Sum/Fuel Sum.
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Distance Sum = The accumulated distance travelled since the last reset of this value.
