Cobalt L4-2.2L (2008)
Driver/Vehicle Information Display: Description and Operation
Driver Information Center (DIC) Description and Operation
The driver information center (DIC) displays important vehicle information. The DIC is also used to display the vehicle 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). Battery power is provided to the DIC switch via the instrument panel cluster (IPC) with the DIC switch signal circuit pulled up to battery voltage
in the IPC. The battery positive voltage circuit is fused in the body control module (BCM). The BCM is responsible for driving and processing the DIC
display through the serial data circuit. 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 the serial data circuit 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):
*
INFO
*
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:
*
AV VEHICLE SPEED
*
AV FUEL ECON
*
COOLANT TEMPERATURE
*
FUEL RANGE
*
OIL LIFE MONITOR
*
TRIP ODOMETER A
*
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
*
Distance = The accumulated distance travelled since the last reset of this value
*
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
*
Distance = The accumulated distance travelled since the last reset of this value
*
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 serial data messages from the BCM requesting the display of the coolant temperature. The coolant temperature is sent to the BCM as
determined by the PCM/ECM via a 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.
