An overhead console featuring a mini trip computer, an electronic compass, and an outside ambient
temperature thermometer is an available factory-installed option on this model. Refer to 8W-49 - Overhead Console in Group 8W - Wiring Diagrams for
complete circuit descriptions and diagrams.
NOTE: This group covers both Left-Hand Drive
(LHD) and Right-Hand Drive (RHD) versions of this
model. Whenever required and feasible, the RHD
versions of affected vehicle components have been
constructed as mirror-image of the LHD versions.
While most of the illustrations used in this group
represent only the LHD version, the diagnostic and
serviceproceduresoutlinedcangenerallybe
applied to either version. Exceptions to this rule
have been clearly identified as LHD or RHD, if a
special illustration or procedure is required.
OVERHEAD CONSOLE
The overhead console for this model includes a
mini trip computer, an electronic compass, and an
outside ambient temperature thermometer. The overhead console also houses two front-mounted and two
rear-mounted reading and courtesy lamps, a garage
COMPASS CALIBRATION ...................5
COMPASS DEMAGNETIZING ................6
REMOVAL AND INSTALLATION
OVERHEAD CONSOLE .....................6
TRIP COMPUTER, COMPASS, AND
THERMOMETER DISPLAY MODULE.........7
PUSH BUTTON MODULE...................7
READING AND COURTESY LAMP BULB .......8
GARAGE DOOR OPENER STORAGE BIN
DOOR.................................8
SUNGLASSES STORAGE BIN................8
AMBIENT TEMPERATURE SENSOR ...........8
SPECIAL TOOLS
COMPASS...............................9
door opener storage bin, and a sunglasses storage
bin.
On models equipped with the Remote Keyless
Entry (RKE) option, the RKE receiver is also located
within the overhead console housing. Refer to Group
8P - Power Lock Systems for more information on
this feature.
Following are general descriptions of the major
components used in the overhead console. Refer to
the owner’s manual in the vehicle glove box for more
information on the features, use and operation of the
various overhead console components.
DESCRIPTION AND OPERATION
TRIP COMPUTER
A mini trip computer is available on this model to
provide several electronic functions and features. The
trip computer contains a central processing unit and
interfaces with other modules in the vehicle on the
Chrysler Collision Detection (CCD) data bus network.
The CCD data bus network allows the sharing of
sensor information. This helps to reduce wire harness complexity, reduce internal controller hardware,
and reduce component sensor current loads. At the
same time, this system provides increased reliability,
enhanced diagnostics, and allows the addition of
many new feature capabilities.
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8V - 2OVERHEAD CONSOLE SYSTEMSXJ
DESCRIPTION AND OPERATION (Continued)
Some of the functions and features that the trip
computer supports and/or controls, include the following display options:
• Compass and temperature
• Trip odometer (ODO)
• Average fuel economy (AVG ECO)
• Instant fuel economy (ECO)
• Distance to empty (DTE)
• Elapsed time (ET)
• Blank display.
Momentarily depressing and releasing the Step
button when the ignition switch is in the On position
will cause the overhead console display to step
sequentiallythrough thelisted displayoptions.
Momentarily depressing and releasing the U. S./Metric button toggles the display between U. S. and Metric measurements.
The push button (Step and U. S./Metric) switch
module in the overhead console is hard wired to the
trip computer. The compass flux-gate unit is integral
to the trip computer, compass, and thermometer display module unit. Data input for all other trip computer functions is received through CCD data bus
messages. The trip computer uses its internal programming and all of these inputs to calculate and
display the requested data. If the data displayed is
incorrect, see Trip Computer, Compass, and Thermometer Display Module - Self-Diagnostic Test in the
Diagnosis and Testing section of this group. If these
tests prove inconclusive, the use of a DRB scan tool
and the proper Diagnostic Procedures manual are
recommended for further testing of the trip computer
and the CCD data bus.
The trip computer, compass, and thermometer display module cannot be repaired, and is only available
for service as a unit. If faulty or damaged, the complete module must be replaced. The push button
(Step and U. S./Metric) switch module is serviced
separately.
COMPASS
The compass will display the direction in which the
vehicle is pointed using the eight major compass
headings (Examples: north is N, northeast is NE). It
does not display the headings in actual degrees.
The self-calibratingcompass unitrequires no
adjusting in normal use. The only calibration that
may prove necessary is to drive the vehicle in three
complete circles, on level ground, in not less than 48
seconds. This will reorient the compass unit to its
vehicle.
The compass unit also will compensate for magnetism the body of the vehicle may acquire during normal use. However, avoid placing anything magnetic
directly on the roof of the vehicle. Magnetic mounts
for an antenna, a repair order hat, or a funeral pro-
cession flag can exceed the compensating ability of
the compass unit if placed on the roof panel. Magnetic bit drivers used on the fasteners that hold the
assembly to the roof header can also affect compass
operation. If the vehicle roof should become magnetized, demagnetizing and calibration may be required
to restore proper compass operation. See Compass
Calibration or Compass Demagnetizing in the Service
Procedures section of this group for these procedures.
The compass, trip computer, and thermometer display module cannot be repaired, and is only available
for service as a unit. If faulty or damaged, the complete module must be replaced. The push button
(Step and U. S./Metric) switch module is serviced
separately.
THERMOMETER
The thermometer displays the outside ambient
temperature.Thetemperaturedisplaycanbe
changed from Fahrenheit to Celsius using the U.
S./Metric button, located just rearward of the display
module. The displayed temperature is not an instant
reading of conditions, but an average temperature. It
may take the thermometer display several minutes
to respond to a major temperature change, such as
driving out of a heated garage into winter temperatures.
When the ignition switch is turned to the Off position, the last displayed temperature reading stays in
the thermometer unit memory. When the ignition
switch is turned to the On position again, the thermometer will display the memory temperature if the
engine coolant temperature is above about 52° C
(125° F). If the engine coolant temperature is below
about 52° C (125° F), the thermometer will display
the actual temperature sensed by the ambient temperature sensor. The thermometer temperature display update interval varies with the vehicle speed.
The thermometer function is supported by an
ambient temperature sensor. The sensor is mounted
outside the passenger compartment near the front
and center of the vehicle and is hard-wired to the
module. The ambient temperature sensor is available
as a separate service item.
The thermometer, compass, and trip computer display module cannot be repaired, and are only available for service as a unit. If faulty or damaged, the
complete module must be replaced. The push button
(Step and U. S./Metric) switch module and ambient
temperature sensor are serviced separately.
READING AND COURTESY LAMP
All reading and courtesy lamps located in the overhead console are activated by the door ajar switches.
When the doors are closed, the lamps can be individually activated by depressing the corresponding lens.
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XJOVERHEAD CONSOLE SYSTEMS8V - 3
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 available 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 adhesivebacked hook and loop fastener material and a selection 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 overhead console. The interior of the bin is lined with a
foam rubber padding material to protect the sunglasses 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 procedures. If the problem is incorrect display lighting levels, use a DRB scan tool and the proper Diagnostic
Procedures manual to test for the correct dimming
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 cavities 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 junction 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-Diagnostic 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 electrically. 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 follows. If all tests are passed, the module will automatically return to normal operation.
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8V - 4OVERHEAD CONSOLE SYSTEMSXJ
DIAGNOSIS AND TESTING (Continued)
a. In the display segment test, if any segment
should fail to light the unit is faulty and must be
replaced.
b. If the internal circuitry test is failed, the module will display “FAIL”. If “FAIL” is displayed, the
unit is faulty and must be replaced.
c. If the CCD data bus message test is failed, the
module will display “CCD”. If “CCD” is displayed, the
use of a DRB scan tool and the proper Diagnostic
Procedures manual are required for further diagnosis.
(5) Momentarily depress and release either button
one time to exit the self-diagnostic test mode and
return the trip computer, compass, and thermometer
display module to normal operation.
NOTE: If the compass functions, but accuracy is
suspect, it may be necessary to perform a variation
adjustment. This procedure allows the compass
unit to accommodate variations in the earth’s magnetic field strength, based on geographic location.
See the Compass Variation Adjustment procedures,
in this group.
NOTE: If the compass reading has blanked out, and
only “CAL” appears in the display module, demagnetizing may be necessary to remove excessive
residual magnetic fields from the vehicle. See the
Compass Demagnetizing procedure, in this group.
THERMOMETER
The thermometer function is supported by a ambient temperature sensor, a wiring circuit, and a portion of the overhead console trip computer, compass,
and thermometer display module display. The sensor
is mounted outside the passenger compartment near
the front and center of the vehicle.
If any portion of the ambient temperature sensor
circuit fails, the thermometer display will self-diagnose the circuit. An “SC” (short circuit) will appear in
the display in place of the temperature, when the
sensor is exposed to temperatures above 55° C (131°
F), or if the sensor circuit is shorted. An “OC” (open
circuit) will appear in the display in place of the temperature, when the sensor is exposed to temperatures
below -40° C (-40° F), or if the sensor circuit is open.
The ambient temperature sensor circuit can also be
diagnosed using the following Sensor Test, and Sensor Circuit Test. If the temperature sensor and circuit are confirmed to be OK, but the temperature
display is inoperative or incorrect, see the Trip Computer, Compass, and Thermometer Display Module
diagnosis in this group. For circuit descriptions and
diagrams, refer to 8W-49 - Overhead Console in
Group 8W - Wiring Diagrams.
SENSOR TEST
(1) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Unplug the temperature sensor wire harness connector.
(2) Measure the resistance of the temperature sensor. At -40° C (-40° F), the sensor resistance is 336
kilohms. At 55° C (131° F), the sensor resistance is
2.986 kilohms. The sensor resistance should read
between these two values. If OK, go to the Sensor
Circuit Test. If not OK, replace the faulty sensor.
SENSOR CIRCUIT TEST
(1) Turn the ignition switch to the Off position.
Disconnect and isolate the battery negative cable.
Unplug the ambient temperature sensor wire harness connector and the overhead console wire harness connector.
(2) Connect a jumper wire between the two terminals in the body half of the sensor wire harness connector.
(3) Check for continuity between the sensor return
circuit and the ambient temperature sensor signal
circuit cavities of the overhead console wire harness
connector. There should be continuity. If OK, go to
Step 4. If not OK, repair the open circuit as required.
(4) Remove the jumper wire from the ambient temperature sensor wire harness connector. Check for
continuity between the sensor return circuit cavity of
the overhead console wire harness connector and a
good ground. There should be no continuity. If OK, go
to Step 5. If not OK, repair the short circuit as
required.
(5) Check for continuity between the ambient temperature sensor signal circuit cavity of the overhead
console wire harness connector and a good ground.
There should be no continuity. If OK, see the Trip
Computer, Compass, and Thermometer Display Module diagnosis in this group. If not OK, repair the
short circuit as required.
SERVICE PROCEDURES
COMPASS VARIATION ADJUSTMENT
Variance is the difference between magnetic north
and geographic north. In some geographic locations,
the difference between magnetic and geographic
north is great enough to cause the compass to give
false readings. If this problem occurs, the compass
variance must be set.
To set the compass variance:
(1) Using the Variance Settings map, find your
geographic location and note the zone number (Fig.
1).
Page 5
XJOVERHEAD CONSOLE SYSTEMS8V - 5
SERVICE PROCEDURES (Continued)
Fig. 1 Variance Settings
(2) Turn the ignition switch to the On position. If
the compass/temperature data is not currently being
displayed, momentarily depress and release the Step
button to step through the display options until you
have reached the compass/temperature display.
(3) Depress both the U. S./Metric, and the Step
buttons. Hold the buttons down until “VAR” appears
in the display. This takes about five seconds.
(4) Release both of the buttons. The current variance zone number setting will appear in the display.
(5) Press and release the U. S./Metric button to
step through the zone numbers, until the zone number for your geographic location appears in the display.
(6) Press the Step button to enter this zone number into the compass unit memory.
(7) Confirm that the correct directions are now
indicated by the compass.
COMPASS CALIBRATION
CAUTION: Do not place any external magnets, such
as magnetic roof mount antennas, in the vicinity of
the compass. Do not use magnetic tools when servicing the overhead console.
The electronic compass unit features a self-calibrating design, which simplifies the calibration procedure.This featureautomaticallyupdatesthe
compass calibration while the vehicle is being driven.
This allows the compass unit to compensate for small
changes in the residual magnetism that the vehicle
may acquire during normal use. Do not attempt to
calibrate the compass near large metal objects such
as other vehicles, large buildings, or bridges.
NOTE: Whenever the compass is calibrated manually, the variation number must also be reset. See
Compass Variation Adjustment in the Service Procedures section of this group.
Calibrate the compass manually as follows:
(1) Start the engine. If the compass/temperature
data is not currently being displayed, momentarily
depress and release the Step button to step through
the display options until you have reached the compass/temperature display.
(2) Depress both the U. S./Metric and the Step
buttons. Hold the buttons down until “CAL” appears
in the display. This takes about ten seconds, and
appears about five seconds after “VAR” is displayed.
(3) Release both of the buttons.
(4) Drive the vehicle on a level surface, away from
large metal objects, through three or more complete
circles in not less than 48 seconds. The “CAL” message will disappear from the display to indicate that
the compass is now calibrated.
Page 6
8V - 6OVERHEAD CONSOLE SYSTEMSXJ
SERVICE PROCEDURES (Continued)
NOTE: If the “CAL” message remains in the display, either there is excessive magnetism near the
compass, or the unit is faulty. Repeat the demagnetizing and calibration procedures at least one more
time.
NOTE: If the wrong direction is still indicated in the
compass display, the area selected for calibration
may be too close to a strong magnetic field. Repeat
the calibration procedure in another location.
COMPASS DEMAGNETIZING
A degaussing tool (Special Tool 6029) is used to
demagnetize, or degauss, the overhead console forward mounting screw(s) and the roof panel. Equivalent units must be rated as continuous duty for 110/
115 volts and 60 Hz. They must also have a field
strength of over 350 gauss at 7 millimeters (0.25
inch) beyond the tip of the probe.
To demagnetize the roof panel and the overhead
console forward mounting screw(s), proceed as follows:
(1) Be certain that the ignition switch is in the Off
position, before you begin the demagnetizing procedure.
(2) Plug in the degaussing tool, while keeping the
tool at least 61 centimeters (2 feet) away from the
compass unit.
(3) Slowly approach the head of the overhead console forward mounting screw with the degaussing
tool plugged in.
(4) Contact the head of each screw with the plastic
coated tip of the degaussing tool for about two seconds.
(5) With the degaussing tool still energized, slowly
back it away from the screw. When the tip of the tool
is at least 61 centimeters (2 feet) from the screw
head, unplug the tool.
(6) Place a piece of paper approximately 22 by 28
centimeters (8.5 by 11 inches), oriented on the vehicle
lengthwise from front to rear, on the center line of
the roof at the windshield header (Fig. 2). The purpose of the paper is to protect the roof panel from
scratches, and to define the area to be demagnetized.
(7) Plug in the degaussing tool, while keeping the
tool at least 61 centimeters (2 feet) away from the
compass unit.
(8) Slowly approach the center line of the roof
panel at the windshield header, with the degaussing
tool plugged in.
(9) Contact the roof panel with the plastic coated
tip of the degaussing tool. Be sure that the template
is in place to avoid scratching the roof panel. Using a
slow, back-and-forth sweeping motion, and allowing
13 millimeters (0.50 inch) between passes, move the
tool at least 11 centimeters (4 inches) to each side of
the roof center line, and 28 centimeters (11 inches)
back from the windshield header.
(10) With the degaussing tool still energized,
slowly back it away from the roof panel. When the
tip of the tool is at least 61 centimeters (2 feet) from
the roof panel, unplug the tool.
(11) Calibrate the compass and adjust the compass
variance as described in the Service Procedures section of this group.
REMOVAL AND INSTALLATION
OVERHEAD CONSOLE
(1) Disconnect and isolate the battery negative
cable.
(2) Remove the two screws located forward of the
display module that secure the overhead console to
the upper windshield opening reinforcement (Fig. 3).
(3) To release the overhead console from the rear
mounting bracket, use your fingertips to gently pull
the sides of the overhead console housing outward
near the rear mounting bracket.
(4) Move the overhead console forward to disengage the rear mounting tab from the headliner.
(6) Unplug one wire harness connector near the
push button module towards the front of the overhead console.
(7) Unplug one wire harness connector from the
Remote Keyless Entry (RKE) receiver near the center
of the overhead console, if the vehicle is so equipped.
(8) Remove the overhead console from the headliner.
(9) Reverse the removal procedures to install.
Tighten the overhead console mounting screws to 2.7
N·m (24 in. lbs.).
TRIP COMPUTER, COMPASS, AND
THERMOMETER DISPLAY MODULE
(1) Remove the overhead console from the vehicle.
See Overhead Console in this group for the procedures.
(2) Remove the two screws that secure the forward
end of the trip computer, compass, and thermometer
display module to the overhead console housing (Fig.
4).
(3) Gently flex the sides of the overhead console
housing as required to release the trip computer,
compass, and thermometer display module mounting
pins.
(4) Pull the trip computer, compass, and thermometer display module away from the overhead console
housing far enough to access the two wire harness
connectors.
(5) Unplug the overhead console and push button
module wire harness connectors from the trip computer, compass, and thermometer display module.
(6) Remove the trip computer, compass, and thermometer display module from the overhead console
housing.
(7) Reverse the removal procedures to install.
Tighten the mounting screws to 2.2 N·m (20 in. lbs.).
PUSH BUTTON MODULE
(1) Remove the overhead console from the vehicle.
See Overhead Console in this group for the procedures.
(2) Unplug the push button module wire harness
connector from the trip computer, compass, and thermometer display module.
(3) Remove the four screws that secure the push
button module to the overhead console housing (Fig.
5).
(4) Remove the push button module from the overhead console.
(5) Reverse the removal procedures to install.
Tighten the mounting screws to 2.2 N·m (20 in. lbs.).
Page 8
8V - 8OVERHEAD CONSOLE SYSTEMSXJ
REMOVAL AND INSTALLATION (Continued)
SUNGLASSES STORAGE BIN
The sunglasses storage bin door and bin, housing,
damper, spring and latch are serviced only as a unit.
Remove the sunglasses storage bin module from the
overhead console as follows:
(1) Remove the overhead console from the vehicle.
See Overhead Console in this group for the procedures.
(2) Disengage the overhead console courtesy lamp
wire harness from the retainers molded into the sunglasses storage bin housing.
(3) Remove the six screws that secure the sunglasses storage bin module to the overhead console
Fig. 5 Push Button Module Remove/Install
1 – PUSH BUTTON MODULE
2 – MOUNTING SCREWS
housing (Fig. 6).
READING AND COURTESY LAMP BULB
(1) Disconnect and isolate the battery negative
cable.
(2) Insert a long, narrow, flat-bladed tool in the
notch on the edge of the reading and courtesy lamp
lens.
(3) Gently pry the lens downward from the overhead console housing and pivot the lens down. It may
be necessary to move the tool along the edge of the
lens to free the lens from the console housing.
(4) Unsnap the bulb from the bulb holders by pulling the bulb gently downwards.
(5) Install a new bulb by aligning its base with the
bulb holders and pushing the bulb firmly into place.
(6) Pivot the lens back up into position and press
upward firmly until it snaps into place.
(7) Connect the battery negative cable.
(8) Test the lamp by depressing the lens to check
for proper lamp switching and lighting.
GARAGE DOOR OPENER STORAGE BIN DOOR
(1) Open the garage door opener storage bin door.
(2) Using a trim stick or another suitable wide
flat-bladed tool, gently pry between the door pivot
pin and the pivot hole on one side of the overhead
console housing until the pivot pin clears the pivot
hole.
(3) Use a gentle twisting action to remove the
garage door opener storage bin door from the overhead console housing.
(4) To install, insert the pivot pin on one side of
the door into the pivot hole in the overhead console
housing. Gently depress the pivot pin on the other
side of the door until it clears the side of the garage
door opener storage bin opening of the overhead console housing, and push the door into the opening.
Guide the door into the opening so that the second
pivot pin snaps into its pivot hole.