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8V - 6
OVERHEAD CONSOLE SYSTEMS
SERVICE PROCEDURES (Continued)
NOTE: If the "CAL" message remains in the dis-
play, either there is excessive magnetism near the
compass, or the unit is faulty. Repeat the demagne-
tizing 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 for-
ward mounting screw(s) and the roof panel. Equiva-
lent 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 fol-
lows:
(1) Be certain that the ignition switch is in the Off
position, before you begin the demagnetizing proce-
dure.
(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 con-
sole 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 sec-
onds.
(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 pur-
pose 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
Fig. 2 Roof Demagnetizing Pattern
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 sec-
tion 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 disen-
gage the rear mounting tab from the headliner.
XJ
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Table of Contents
Troubleshooting
