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In the lower middle of the instrument cluster, an additional display is installed. Its task is to give additional information, such as an odometer or error codes/warning messages. Refer to Indicator/Warning Message Description and Operation .
There are 4 switch functions for the driver information centre:
| • | Menu |
| • | Set/Clear |
| • | Up |
| • | Down |
The Menu switch is used to navigate between the Vehicle Information Menu and the Trip/Fuel Information Menu. Cycle through the following vehicle parameters by successive pressing of the Menu switch.
The Up and the Down switches are used to navigate within the menus. Cycle through the following menu parameters by successive pressing of the Down switch.
| • | Units Menu |
| • | Speed Warning |
| • | Trip 1 |
| • | Fuel Range |
| • | Average Fuel Economy |
| • | Instantaneous Fuel Economy |
| • | Average Vehicle Speed |
The trip odometer can be accessed through the driver information centre switch Up/Down function.
Driver Information Centre Trip Display | Range | ||
|---|---|---|---|
Europe-SI | USA | GB | |
TRIP 1 | ####.#km | ####.#miles | ####.#miles |
This message indicates the estimated distance that the vehicle can travel under the current fuel economy and fuel level conditions since the last battery connection to the instrument cluster. Fuel Range is calculated using the equation: Fuel Range = Range Distance/Range Fuel Used.
| • | Range Distance = The accumulated distance travelled since the last reset of this value. |
| • | Fuel Used = The accumulated fuel delivered since the last reset of this value |
The engine control module (ECM) sends the fuel range value to the instrument cluster. The instrument cluster receives a serial data message with fuel information. The fuel range value is retained during ignition OFF and can be changed between Europe-SI, USA and GB units by accessing the driver information centre Units menu. The Fuel Range display cannot be reset. LOW is displayed when fuel range is below a predetermined value.
Average fuel economy is calculated using the equation: Average Fuel Economy = 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 ECM sends the average fuel economy serial data message to the instrument cluster. The value of this mode is retained during ignition OFF and can be changed between English units and metric units by selecting from the driver information centre options menu.
The ECM sends the instantaneous fuel economy serial data message to the instrument cluster. The value of this mode can be changed between English units and metric units by selecting from the driver information centre options menu.
Average speed is calculated using the equation: Average Speed = Average Speed Distance/Average Speed Time
| • | 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 |
The unit mode is used to toggle between Europe-SI, USA and GB units and can be accessed through the driver information centre Menu switch and the driver information centre Set/Reset switch.
The instrument cluster displays the vehicle odometer in the driver information centre. The ECM send a distance rolling count message on GMLAN to the body control module (BCM). The BCM uses this information to calculate the vehicle odometer. This odometer value is then sent to the instrument cluster on GMLAN. The instrument cluster does not calculate the odometer. The odometer displays miles or kilometres as selected in the Units menu.
The odometer value is stored in multiple modules. The instrument cluster is a secondary storage module for the odometer, while the BCM is the primary storage and accumulator.
In addition to storing the odometer value for the vehicle, the instrument cluster and the BCM store the VIN. Software checks are performed to ensure these modules, and their stored odometer information, cannot be moved or transferred between different vehicles.
If the VINs do not match, the instrument cluster will go into an error mode and display "----" (dashes). If the VIN mismatch exists over a calibrated distance, the instrument cluster will "lock" the odometer display and only show dashes, even if the VIN mismatch is subsequently correct. The only way to clear or "unlock" the instrument cluster is to perform a BCM programming event using SPS.
The driver information centre is capable of displaying in different languages, corresponding to the radio language settings. The instrument cluster receives a serial data message with language information from the radio.
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