Grand Cherokee 4WD V8-4.7L VIN N (2000)
Driver/Vehicle Information Display: Testing and Inspection
Electronic Vehicle Information Center
ELECTRONIC VEHICLE INFORMATION CENTER
If the problem with the Electronic Vehicle Information Center EVIC. is an "Open Circuit" or "Short Circuit" shown in the compass/thermometer
display, refer to Ambient Temperature Sensor. If the problem with the EVIC is an inaccurate or scrambled display, refer to Self-Diagnostic Test
. If the problem with the EVIC is incorrect Vacuum Fluorescent Display (VFD) dimming levels, use a DRB scan tool and the proper Diagnostic
Procedures to test for the correct dimming message inputs being received from the Body Control Module (BCM) over the Programmable
Communications Interface (PCI) data bus. If the problem is a no-display condition, use the following procedures.
1. Check the fused B(+) fuse in the junction block. If OK, go to Step 2. If not OK, repair the shorted circuit or component as required and replace
the faulty fuse.
2. Check for battery voltage at the fused B(+) fuse in the junction block. If OK, go to Step 3. If not OK, repair the open fused B(+) circuit to the
fused B(+) fuse in the PDC as required.
3. Check the fused ignition switch output (run/start) fuse in the junction block. If OK, go to Step 4. If not OK, repair the shorted circuit or
component as required and replace the faulty fuse.
4. Turn the ignition switch to the ON position. Check for battery voltage at the fused ignition switch output (run/start) fuse in the junction block.
If OK, go to Step 5. If not OK, repair the open fused ignition switch output (run/start) circuit to the ignition switch as required.
5. Turn the ignition switch to the OFF position. Disconnect and isolate the battery negative cable. Remove the overhead console. Check for
continuity between the ground circuit cavity of the roof wire harness connector for the EVIC module and a good ground. There should be
continuity. If OK, go to Step 6. If not OK, repair the open ground circuit to ground as required.
6. Connect the battery negative cable. Check for battery voltage at the fused B(+) circuit cavity of the roof wire harness connector for the EVIC
module. If OK, go to Step 7. If not OK, repair the open fused B(+) circuit to the fused (B+) fuse in the junction block as required.
7. Turn the ignition switch to the ON position. Check for battery voltage at the fused ignition switch output (run/start) circuit cavity of the roof
wire harness connector for the EVIC module. If OK, refer to Self-Diagnostic Test for further diagnosis of the EVIC module and the PCI data
bus. If not OK, repair the open fused ignition switch output (run/start) circuit to the fuse in the junction block as required.
