Grand Cherokee 2WD V8-4.7L VIN N (2000)
Driver/Vehicle Information Display: Testing and Inspection
Self-Diagnostic Test
SELF-DIAGNOSTIC TEST
A self-diagnostic test is used to determine that the EVIC module is operating properly, and that all PCI data bus messages are being received for
initial operation. Initiate the self-diagnostic test as follows:
1. With the ignition switch in the OFF position, simultaneously depress and hold the C/T button and the RESET button.
2. Turn the ignition switch to the ON position.
3. Continue to hold both buttons depressed until the EVIC software version information is displayed, then release both buttons.
4. Following completion of these tests, the EVIC module will display one of the following messages:
a. Pass Self Test - Momentarily depress and release the Reset button to return to the compass thermometer/trip computer display mode. The
EVIC module is working properly.
b. Failed Self Test - The EVIC module has an internal failure. The EVIC module is faulty and must be replaced.
c. Failed J185O Communication - The EVIC module is not receiving proper message input through the PCI data bus. This can result from
one or more faulty electronic modules in the vehicle, or from a faulty PCI data bus. The use of a DRB scan tool and the proper Diagnostic
Procedures are required for further diagnosis.
NOTE: If the compass functions, but accuracy is suspect, it may be necessary to perform a variation adjustment. This procedure allows
the compass unit to accommodate variations in the earth's magnetic field strength, based on geographic location. Refer to Compass
Variation Adjustment in the Service Procedures.
NOTE: If the compass reading displays dashes, and only "CAL" appears in the display, demagnetizing may be necessary to remove
excessive residual magnetic fields from the vehicle. Refer to Compass Demagnetizing in the Service Procedures.
