Dakota Quad Cab 2WD V8-5.9L VIN Z LDC (2002)
Compass Variance is the difference between Magnetic North and Geographic North. In some areas of the country; the difference between
Magnetic and Geographic North is great enough to cause the compass to give false readings. If this occurs, the compass variance must be set.
To Set The Variance
Turn the ignition ON and set display to Comp./Temp. While pressing the US/M button, press the STEP button for approximately 5 seconds. The
"VAR" symbol will light and the last variance zone number will be displayed. Press the US/Metric Button to select the proper variance zone as
shown on the map. Press the Step button to set the new variance zone and resume normal operation.
TEMPERATURE
The temperature displays the outside ambient temperature in whole degrees. The temperature display can be changed from Fahrenheit to Celsius
using the U.S./Metric push button. The displayed temperature is not an instant reading of conditions, but an average temperature. It may take the
temperature display several minutes to respond to a major temperature change, such as driving out of a heated garage into winter temperatures.
When the ignition switch is turned to the OFF position, the last displayed temperature reading stays in the temperature unit memory. When the
ignition switch is turned to the ON position again, the temperature will display the memory temperature if the engine OFF time is less than 90
minutes. If the engine OFF time is more than 90 minutes, the temperature will display the actual temperature sensed by the ambient temperature
sensor. The temperature display update interval varies with the vehicle speed.
The temperature function is supported by an ambient temperature sensor. The sensor is mounted outside the passenger compartment near the front
and center of the vehicle, and is hard wired to the HVAC control head which sends temperature on J1850 data bus circuit. The ambient
temperature sensor is available as a separate service item.
NOTE: The compass/mini-trip computer will display mm and max temperatures of -40 °C (-40 °F) and 54 °C (130 °F).
