Jeep 1997 Grand Cherokee Service Manual page 1346

8W - 46 - 8
GENERAL INFORMATION
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . 8
DESCRIPTION AND OPERATION
GRAPHIC DISPLAY MODULE . . . . . . . . . . . . . . . 8
GENERAL INFORMATION
INTRODUCTION
Each four-wheel drive equipped Grand Cherokee is
equipped with a four-wheel drive Graphic Display
Module (GDM). The GDM is located at the bottom of
the instrument panel center stack. The GDM dis-
plays transfer case mode selection.
Some vehicle are equipped with an optional Vehicle
Information Center (VIC). The VIC has several func-
tions:
• Display current time and date.
• Monitor specific vehicle operating systems and
alert the driver if a malfunction occurs.
• Display service reminder or indicate distance to
service.
• Display 2WD/4WD transfer case modes of oper-
ation.
DESCRIPTION AND OPERATION
GRAPHIC DISPLAY MODULE
Several fuses supply power to the Graphic Display
Module (GDM). When the ignition switch is in the
RUN position it connects circuit A1 from fuse 8 in
the PDC to circuit A22. Circuit A22 feeds circuit F83
through fuse 6 in the junction block. Circuit F83 sup-
plies voltage to the GDM.
Circuit A7 from fuse 15 in the PDC powers circuit
F60 through fuse 20 in the junction block. Circuits
A7 and F60 are HOT at all times. Circuit F60 feeds
the GDM. Circuits Z1 and Z2 provide ground for the
GDM.
TRANSFER CASE RANGE DISPLAY
When the transfer case is in either 4WD Low, Part
Time 4WD, or Full Time it connects circuit G28 from
the Graphic Display Module (GDM) to ground on cir-
cuit Z12. In response, the GDM illuminates the 4WD
display.
When the transfer case switch is in 4WD Low, it
connects circuit G28 from the GDM to ground on cir-
cuit Z12. In addition to illuminating the 4WD dis-
play, the GDM also illuminates the LOW display.
8W - 46 MESSAGE CENTER
8W-46 MESSAGE CENTER
INDEX
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VEHICLE INFORMATION CENTER . . . . . . . . . . . 8
When the transfer case switch is in Part Time
4WD position, it connects circuit T107 from the GDM
to ground on circuit Z12. In addition to illuminating
the 4WD display, the GDM also illuminates the
PART TIME display.
When the transfer case switch is in Full Time 4WD
position, it connects circuit T106 from the GDM to
ground on circuit Z12. In addition to illuminating the
4WD display, the GDM also illuminates the FULL
TIME display.
VEHICLE INFORMATION CENTER
Several fuses supply power to the Vehicle Informa-
tion Center (VIC). When the ignition switch is in the
RUN position it connects circuit A1 from fuse 8 in
the PDC to circuit A22. Circuit A22 feeds circuit F83
through fuse 6 in the junction block. Circuit F83 sup-
plies voltage to the VIC.
Circuit A7 from fuse 15 in the PDC powers circuit
F60 through fuse 20 in the junction block. Circuits
A7 and F60 are HOT at all times. Circuit F60 feeds
the VIC.
Circuit A6 from fuse 13 in the PDC powers circuit
366 through fuse 17 in the junction block. Circuit 366
connects to the headlamp switch. When the head-
lamp switch is in the PARK or LOW position, it con-
nects circuit 366 to circuit L90. Circuit L90 connects
to the VIC. Circuit E2 from the Body Control Module
(BCM) powers the illumination lamps in the VIC.
Circuits Z1 and Z2 provide ground for the VIC.
TRANSFER CASE RANGE DISPLAY
When the transfer case is in either 4WD Low, Part
Time 4WD, or Full Time it connects circuit G28 from
the Vehicle Information Center (VIC) to ground on
circuit Z12. In response, the VIC illuminates the
4WD display.
When the transfer case switch is in 4WD Low, it
connects circuit G28 from the VIC to ground on cir-
cuit Z12. In addition to illuminating the 4WD dis-
play, the VIC also illuminates the LOW display.
ZG
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