Garage Door Opener Storage Bin Description And Operation; Sunglasses Storage Bin Description And Operation; Trip Computer, Compass And Thermometer Display Module Diagnosis And Testing; Self-Diagnostic Test - Jeep 200 Cherokee Service Manual

XJ
DESCRIPTION AND OPERATION (Continued)
When a door is open, depressing the lamp lens
switches will not turn the lamps off. Refer to Group
8L - Lamps, for diagnosis of the reading and courtesy
lamps.
The reading and courtesy lamp lens, and bulbs are
available for service replacement. The reading and
courtesy lamp holders and switches are only avail-
able as part of the overhead console wire harness. If
any reading lamp switch is faulty or damaged, the
wire harness and all four switches must be replaced.
GARAGE DOOR OPENER STORAGE BIN
A compartment in the overhead console is designed
to hold most garage door opener remote control
transmitters. The transmitter is mounted within the
compartment with an adhesive-backed hook and loop
fastener patch.
With the transmitter mounted in the storage bin,
adapter pegs located on the front of the storage bin
door are selected and mounted on a post near the
center of the storage bin door. The peg(s) selected
and/or the post must be long enough to depress the
button of the transmitter, when the garage door
opener storage bin door is depressed. The pegs may
be stacked, if necessary. Refer to the owner's manual
in the vehicle glove box for more information.
A transmitter mounting kit including the adhesive-
backed hook and loop fastener material and a selec-
tion of pegs is available for service. The garage door
opener storage bin door assembly is also available for
service replacement.
SUNGLASSES STORAGE BIN
A sunglasses storage bin is included in the over-
head console. The interior of the bin is lined with a
foam rubber padding material to protect the sun-
glasses from being scratched. This bin features a
push/push-type latching mechanism, and a viscous
dampening system for a fluid opening action.
The sunglasses storage bin door, latch, viscous
damper, hinge spring and housing are available for
service only as a complete module. If any part of this
unit is faulty or damaged, the entire module must be
replaced.
DIAGNOSIS AND TESTING
TRIP COMPUTER, COMPASS, AND
THERMOMETER DISPLAY MODULE
If the problem with the trip computer, compass,
and thermometer display module is an inaccurate or
scrambled display, use the Self-Diagnostic Test proce-
dures. If the problem is incorrect display lighting lev-
els, use a DRB scan tool and the proper Diagnostic
Procedures manual to test for the correct dimming
OVERHEAD CONSOLE SYSTEMS
message inputs being received from the instrument
cluster over the Chrysler Collision Detection (CCD)
data bus. If the problem is a no-display condition,
use the following procedures. For circuit descriptions
and diagrams, refer to 8W-49 - Overhead Console in
Group 8W - Wiring Diagrams.
(1) Check the fuses in the junction block and the
Power Distribution Center (PDC). If OK, go to Step
2. If not OK, repair the shorted circuit or component
as required and replace the faulty fuse(s).
(2) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output fuse in the junction block. If OK, go to Step 3.
If not OK, repair the open circuit to the ignition
switch as required.
(3) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Remove the overhead console from the headliner.
Check for continuity between the ground circuit cav-
ities of the overhead console wire harness connector
and a good ground. There should be continuity. If
OK, go to Step 4. If not OK, repair the open circuit to
ground as required.
(4) Connect the battery negative cable. Check for
battery voltage at the fused B(+) circuit cavity of the
overhead console wire harness connector. If OK, go to
Step 5. If not OK, repair the open circuit to the junc-
tion block as required.
(5) Turn the ignition switch to the On position.
Check for battery voltage at the fused ignition switch
output circuit cavity of the overhead console wire
harness connector. If OK, proceed to the Self-Diag-
nostic Test in this group for further diagnosis of the
module and the CCD data bus. If not OK, repair the
open circuit to the junction block as required.

SELF-DIAGNOSTIC TEST

A self-diagnostic test is used to determine that the
trip computer, compass, thermometer, and all of the
display module segments are operating properly elec-
trically. Initiate the self-diagnostic test as follows:
(1) With the ignition switch in the Off position,
simultaneously press and hold the Step button and
the U. S./Metric button.
(2) Turn the ignition switch to the On position.
(3) Continue to hold both buttons until the display
module performs a display segment test. In this test,
all of the vacuum fluorescent display segments are
lighted. This test will:
a. Verify that all display segments are functional
b. Check the internal circuitry of the module
c. Check that all of the CCD data bus messages
needed are being received.
(4) Respond to the respective test results as fol-
lows. If all tests are passed, the module will automat-
ically return to normal operation.
8V - 3