Dakota 2WD V8-4.7L VIN J (2005)
also affect compass operation. If the vehicle roof should become magnetized, (Refer to ELECTRICAL/OVERHEAD
CONSOLE/COMPASS/MINI-TRIP COMPUTER - STANDARD PROCEDURE - COMPASS DEMAGNETIZING) to restore proper compass
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 miles 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 FCM, which sends temperature over the CAN data bus circuit. The ambient temperature sensor is available
as a separate service item.
NOTE: The EOM will display min and max temperatures of -40° C (-40° F) and 66° C (140° F).
The Electronic Overhead Module (EOM) only operates with the ignition switch in the On position. When the ignition switch is turned to the On position,
the Vacuum-Fluorescent Display (VFD) will return to the last function being displayed before the ignition was turned to the Off position. With the
ignition switch in the On position, momentarily depressing and releasing the STEP push button (4) will cause the EOM to change its mode of operation.
Momentarily depressing and releasing the U.S./Metric push button (1) will cause the unit to toggle between U.S. and Metric measurements. Momentarily
depressing and releasing the C/T (compass/temperature) push button (5) will cause the EOM to return to the compass/temperature display mode from
any other mode.
This EOM features several functions that can be reset. If the RESET push button (2) is depressed for more than one second with the ignition switch in
the On position, the trip computer information that can be reset is reset. However, the reset will only occur if the function currently displayed is a
function that can be reset. The functions that can be reset are: TRIP ODO, AVG ECO, and ET. All three of these functions can be reset at once by
pressing the RESET button twice within 3 seconds while any one of the three functions is selected.
