Grand Cherokee 4WD V8-4.7L (2003)
The RESET Button has two different functions:
1. To clear the trip functions that may be reset
2. To enter and exit the diagnostic mode
Pressing the RESET button once will clear the trip function that is currently being displayed (except Distance to Service) and the EVIC will send a
PCI bus beep request to the BCM. If the RESET button is pressed again within 3 seconds, the EVIC will reset ALL of the trip functions and an
additional beep request is sent to the BCM. The trip functions that may be reset are:
-
Average Fuel Economy
-
Trip Odometer
-
Elapsed Time
A reset will only occur if one of the trip functions that may be reset is currently being displayed.
Pressing the RESET button for more than three (3) seconds resets the Distance to Service function while the Distance to Service message is being
displayed. The EVIC module will send a beep request to the BCM.
Simultaneously pressing the RESET button and the CIT button while turning the ignition from Off to On will enter the EVIC into the self-diagnostic
mode.
COMPASS/TEMPERATURE (C/T) BUTTON
Actuating the Compass/Temperature Button (C/T) will cause the EVIC to display the compass and temperature information. This function will operate
from another traveler display or from the programmable feature mode.
TRAVELER DISPLAY FUNCTIONS
Using the STEP button will change the EVIC between modes of operation and display the appropriate information according to data received from the
PCI Bus.
COMPASS/TEMPERATURE
The EVIC simultaneously displays the compass reading and the outside temperature. Outside temperature information is received via the PCI bus from
the BCM.
The EVIC module internally senses and calculates the compass direction.
COMPASS OPERATION
Upon ignition on, if the calibration information stored in the EVIC memory is within the normal range, the EVIC will perform in slow Auto-Cal mode.
In slow Auto-Cal mode, the EVIC continuously compensates for the slowly changing magnetic field of the vehicle. The compass module detects
changes in the vehicle magnetism and makes appropriate internal corrections to ensure proper displayed direction.
However, if the calibration information stored in the EVIC memory is not within the normal range at ignition on, the EVIC will enter fast Auto-Cal.
CAL is displayed along with the temperature.
Auto activation of the fast Auto-Cal mode will also occur when the EVIC is subjected to high magnetic field strength levels, which cause all compass
readings to be erroneous for a continuous period of five (5) minutes. During fast Auto-Cal, CAL will be displayed along with the temperature.
Fast Auto-Cal can also be performed manually, by pressing and holding the RESET button for 10 seconds during the Compass/Temperature display
mode.
