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Home >> Jeep >> 2012 >> Grand Cherokee Laredo, RWD >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Instrument Cluster (Service Information) >> Operation >> Operation >> Liquid Crystal Display

Liquid Crystal Display

The LCD unit is an integrated part of the CCN and is soldered to the electronic circuit board. With the ignition switch in the OFF or ACCESSORY positions, the odometer display is activated when the driver door is opened (Rental Car mode) and is deactivated when the driver door is closed. Otherwise, the display unit is active when the ignition switch is in the ON or START positions, and inactive when the ignition switch is in the OFF or ACCESSORY positions. The LCD has several display capabilities including odometer, trip odometer, engine hours, gear selector indication (PRNDL), several warning or reminder indications, and various diagnostic information when certain fault conditions exist.

Dual trip odometer (Trip A and Trip B) capability is standard equipment on this vehicle. Both trip odometers appear within the LCD display unit, although they cannot be displayed simultaneously. The trip odometer information is stored in the instrument cluster memory. Each trip odometer can display values up to 16099.9 kilometers (9999.9 miles). Each trip odometer will roll over to zero independently when it accumulates these values. The trip odometer minimum value is 0.0  (miles or kilometers) and does have a decimal point to show tenths of a full unit values (miles or kilometers).

The buttons in the left side of the steering wheel control many of the display modes for the EVIC. Actuating the SCROLL  buttons momentarily with the ignition switch in the ON position will toggle the display to the trip info menu. With Trip info highlighted, press the STEP  bottom momentarily to enter the trip menu. Select TRIP A  or TRIP B  , depressing the STEP  button for about two seconds while one of the trip odometer modes is displayed will reset that trip odometer value to zero. To return, press the BACK  button, scroll through the main menu to turn menu off and press the step button.

The LCD unit can be diagnosed using the CCN self-diagnostic test. Refer to DIAGNOSIS AND TESTING . Proper testing of the CAN data bus and the electronic data bus message inputs to the CCN that control some of the VFD functions requires the use of a diagnostic scan tool. Refer to the appropriate diagnostic information. Specific operation details for the odometer, the trip odometer, the gear selector indicator and the various warning and reminder indicator functions of the VFD unit may be found elsewhere in this service information.