Compass Display
The compass display circuitry is entirely contained within the DIC on vehicles without a sunroof. On vehicles equipped with a sunroof, there is a remote compass sensor that is connected to the DIC.
Temperature Display
The DIC applies voltage to the ambient air temperature gauge sensor. The ambient air temperature gauge sensor is a thermister (the temperature and the resistance vary inversely):
| • | As the resistance of the ambient air temperature gauge sensor increases, the DIC senses a larger voltage drop across the sensor, indicating a lower temperature. |
| • | As the resistance of the ambient air temperature gauge sensor decrease, the DIC senses a smaller voltage drop across the sensor, indicating a higher temperature. |
If the temperature is below 3°C (37°F) the temperature digits will toggle between displaying the following items for 2 minutes:
| • | The outside temperature |
| • | The word ICE |
This condition occurs once per ignition cycle.
The DIC uses the vehicle speed signal from the powertrain control module (PCM) in order to determine when to update the temperature display with a new outside air temperature reading. The vehicle must be driven over 16 km/h (10 mph) before the temperature display updates.
Trip Computer Display
The information displayed in the Trip Computer Mode is derived from data collected by the PCM and BCM. These data and the results are sent to the DIC via the class 2 data communications link.
Dimming Control
Display dimming for the trip calculator follows the radio dimming characteristics. Upon activation of the parklamps, the display steps from dim to maximum brightness while in the dim mode. Further dimming is controlled by the PWM dimming signal of the IP dimming control. The display goes blank upon lowest dimming request of the dimming control.
