Quote:
EVIC
The EVIC, or Electronic Vehicle Information Center, is the high resolution overhead console available in the Liberty. It can be differentiated from the low resolution OTIS by its white text laden buttons and separate menu button. There are three different EVICs available in the Liberty. The base version (56010520AD) features a compass, temperature readout, fuel statistics, and since 2005, a low drive tire and low spare tire notification. The mid-line version features everything available in the base model, plus three HomeLink garage opener buttons. The high-end version (56010527AD) features everything available in the base and mid models, plus individual tire PSI readouts.
EVIC installation involves cutting a console sized hole in the headliner, installing a hidden plastic mounting bracket, and running a small wiring harness. A Chrysler thermometer also needs to be installed to prevent a blank readout in the compass/temperature (C/T) selection.
In 2003, a cheaper EVIC that only gave the PSI readouts of the four driving tires was introduced. Since 2003, units can be switched from five readouts to four by programming a bit in the EVIC. In 2004 and earlier, the pressure sensors require training with a special magnet when the system was installed and whenever the tires were rotated. In 2005 and later, this is done automatically. While installing Grand Cherokee EVICs in Libertys is common practice, since 2005 it is no longer possible. The 2005 and later Grand Cherokees use the CAN bus while the Liberty uses the incompatible PCI Bus.
Assume details apply to all consecutive years otherwise noted in a later year.
http://en.wikibooks.org/wiki/Jeep_Liberty/Electrical/Overhead_ConsolesAlso, info on the Grand Cherokee EVIC's
http://www.wjjeeps.com/evic.htm