center console CHEVROLET DYNASTY 1993 Service Manual

WARNING: THE SELF ADJUSTING FEATURE OF THIS
PARKING BRAKE LEVER ASSEMBLY CONTAINS A
CLOCK SPRING LOADED TO APPROXIMATELY 30
POUNDS. CARE MUST BE TAKEN TO PREVENT EX-
CESSIVE JARRING OF THE ASSEMBLY. DO NOT
RELEASE THE SELF ADJUSTER LOCKOUT DEVICE
BEFORE INSTALLING CABLES INTO THE EQUAL-
IZER. KEEP HANDS OUT OF SELF ADJUSTER SEC-
TOR AND PAWL AREA. FAILURE TO OBSERVE CAU-
TION IN HANDLING THIS MECHANISM COULD LEAD
TO SERIOUS INJURY.
When repairs to the hand lever assembly or cable
system are required the self adjuster must be reloaded
and locked out.
SELF ADJUSTING PROCEDURES (AG & AJ BODY)
TO RELOAD SELF ADJUSTER
(1) Remove ash receiver or courtesy light from rear
of center console to gain access to self adjuster. Also,
remove carpet from sides of console. (2) Pull on equalizer/output cable to wind up sprin-
g(requires greater than 30 pounds effort). Continue
until self adjuster lockout pawl is positioned about
midway on the self adjuster sector (Fig. 6). Rotate
lockout pawl into self adjuster sector by turning allen
screw clockwise. Rotating lockout device requires
very little effort. Do not force or failure of lock-
out device will occur. (3) When repairs are complete, adjust rear brakes
before adjusting parking brake. On drum-in-hat type of
rear disc brake adjust shoe diameter to 171.5 mm (6.75
inch).
ADJUST PARKING BRAKE (AG & AJ BODY)
Be sure that the cables are properly assembled to the
equalizer bracket prior to cable adjustment. (1) Insert a 7/32 inch allen wrench into hex socket
and turn counter-clockwise through approximately 15É
of rotation (Fig. 4). In turning lockout device, self
adjuster release is a loud snapping noise followed by
reaching a more felt than heard detent. Very light
effort is required to seat lockout arm into detent.
Follow through to the detent is important in prevent-
ing the lockout rod from rattling. Note: The parking brake handle can be in any
position when releasing self adjuster. (2) Cycle lever to position cables. Rear wheels should
rotate freely without dragging.
REAR PARKING BRAKE CABLE REMOVAL (AA, AC,
AP, AY BODY)
The rear brake cables are attached to rear connec-
tors. Should it become necessary to remove either parking
brake cable for installation of a new cable, proceed as
follows: With vehicle jacked up on a suitable hoist, remove
wheel and tire assembly (Fig. 6). Back off cable adjusting nut to provide slack and
disconnect rear brake cable from connector.
DRUM BRAKES
(1) Disconnect park brake cable from park brake
lever in rear wheel brakes. (2) Using an aircraft type hose clamp compress re-
tainers on end of cable housing and start cable out of
retaining hole in the support plate. Remove clamp
when retainers are free of the mounting hole in the
support plate, (Fig. 6).
(3) Remove clip from brake cable at support
bracket and pull cable away from trailing arm as-
sembly (Figs. 3 and 4).
DISC BRAKES
(1) Remove disc brake caliper from adapter, and
brake disc (rotor) from rear hub.
Fig. 5 Self Adjusting Parking Brake Lever Assembly
Fig. 6 Removing Brake Cable from Support Plate
Ä BRAKES 5 - 61

(8) Plug in the demagnetizing tool, keeping it at
least 2 feet away from the compass unit. (9) Slowly approach the center of the roof panel at
the windshield with the demagnetizing tool plugged
in.
² Contact the roof panel with the tip of the tool.
² Using slow sweeping motions of 1/2 inch between
sweeps
² Move the tool approximately 4 inches either side of
the centerline, and at least 11 inches back from the
windshield. (10) With the demagnetizing tool still energized,
slowly back away from the roof panel until the tip is
at least two feet from the roof before unplugging the
tool. (11) Recalibrate compass.
COMPASS DIAGNOSTICS
To place the unit into the diagnostics mode, turn
the vehicle ignition off. Depress the Comp/Temp but-
ton while turning on the ignition/run switch. The
display will then show DO. There are three tests that
can be performed when in the diagnostics mode.
Press the U.S./Metric button to choose test desired
(Fig. 5).
Test 1 (d1) determines the magnetic field strength
at the compass. The compass displays compensation
numbers which, correspond to the current magnetic
field strength at the compass. The letter N is dis-
played in the compass portion of the display. While a
number which, corresponds to the magnetic field
strength in the North/South direction is displayed.
The temperature portion of the display or the letter
W is displayed in the compass portion of the display. A number which, corresponds to the magnetic field
strength in the East/West direction is displayed in
the temperature portion of the display. For proper
compass operation the numbers should be between 1
and 14. A number of 7 or 8 is ideal (no vehicle mag-
netism) while numbers approaching 1 or 14 show
that the vehicle is highly magnetic. If the numbers
show that the vehicle is highly magnetic, perform
the demagnetized procedure in this Group and retest
for magnetism at compass. Test 2 (d2) checks the electronic circuits of the
compass, temperature. If the test passes d2 will be
displayed, and if the test fails F2 will be displayed.
Refer to Body Diagnostic Procedure Manual for fur-
ther testing procedures. Test 3 (d3) performs a walking segment test which,
sequentially puts different directions and numbers on
the display. If any segment fails, replace the compass
module.
SELF-DIAGNOSTIC TEST
(1) With the ignition switch in the OFF position si-
multaneously press the Comp/Temp button and the
US/Metric button. (2) Turn ignition switch ON.
(3) Continue to hold both buttons until the display
performs a walking segment test. This checks for
open or shorted segments. To repeat the test press
the Comp/Temp button. (4) Press the US/Metric button, all segments will
light for about 2 seconds. To repeat the test press the
Comp/Temp button. (5) Press the US/Metric button to return to normal
operation.
OVERHEAD CONSOLE REPLACEMENT
(1) Unscrew the mounting screw in sun glass bin
compartment (Fig. 6).
(2) Slide console forward toward windshield until
the console unhooks from roof bracket. (3) Disconnect wire harness from console.
(4) For installation reverse above procedures.
Fig. 5 Terminal Identification
Fig. 6 Overhead Console Mounting
Ä OVERHEAD CONSOLE 8C - 5

COMPASS MODULE REPLACEMENT
(1) Remove overhead console.
(2) Using a small screwdriver, release the 2 snaps
at rear of compass module. (3) After releasing the 2 snaps, slide compass mod-
ule rearward until free of mounting bar. (4) For installation reverse above procedures.
AMBIENT TEMPERATURE SENSOR
(1) Raise and support vehicle on safety stands.
(2) From behind front bumper fascia, remove screw
attaching sensor to front lower crossmember (Fig. 7). (3) For installation, reverse above procedures.
AC AND AY BODY
INDEX
page page
Ambient Temperature Sensor ............... 12
Automatic Calibration Set Procedure ........... 8
Bezel/Button Switch Removal ............... 10
Bus Accessed Diagnostics .................. 10
Console Removal ........................ 10
Electronic Board Assembly Replacement ....... 10
Electronic Vehicle Information Center (EVIC) Overhead Console ....................... 6 Engine Compartment Node Removal
.......... 12
EVIC Self Check Diagnostics ................ 8
Manual Calibration Set Procedure ............. 8
Map Reading Lamps/Power Sunroof Switch Removal .............................. 11
Overhead Reading/Courtesy Lamp Console ..... 11
Wiring Harness Removal ................... 10
ELECTRONIC VEHICLE INFORMATION CENTER
(EVIC) OVERHEAD CONSOLE
The Electronic Vehicle Information Center is a
computer controlled warning system which, monitors
various sensors used on the vehicle. The system sup-
plements the warning indicators in 8the instrument
cluster. Visual warning messages are displayed by a
digital display in the overhead console (Fig. 1).
When a warning message has been activated, a
tone will sound to attract the driver's attention. The
warning message will then be displayed on the over-
head console until the condition is corrected or a new
display function is called up. A tone will announce each new warning condition.
For complete diagnostic procedures for the EVIC
systems, refer to the Body-Chassis Diagnostic Test
Procedures Manual. The EVIC has a 24 function system that provides
the driver with visual messages when a warning con-
dition exists. These messages are displayed on the
overhead console. For complete EVIC overhead console operating in-
structions, refer to the Owners Manual provided with
the vehicle.
EVIC BUTTON FUNCTIONS
TIME button will display:
² Time of day
² Day of week
² Day of month
² Month of year
The body controller is the source of this informa-
tion. The EVIC function buttons are used to reset
and display this data.
² To set HOURS, press TIME button and within four
seconds press the SET button. An arrow will appear
on the display and point to the hours. Press and hold
the SET button to advance the hours or INFO button
to set back the hours.
² To set MINUTES, press TIME button. The arrow
will point to the minutes. Press and hold the SET
button to advance the minutes or INFO button to set
back the minutes.
Fig. 7 Ambient Temperature Sensor
Fig. 1 EVIC Overhead Console
8C - 6 OVERHEAD CONSOLE Ä

MAP READING LAMPS/POWER SUNROOF SWITCH
REMOVAL
SWITCH REPLACEMENT
(1) Remove console, refer to Console Replacement.
(2) Disconnect switch wiring connector from re-
taining bracket. (3) Pry switch out of bezel snap tabs.
(4) Replace switch.
(5) For installation reverse above procedures.
LAMP/LENS REMOVAL
(1) Remove lens by inserting a flat blade tool into
slot located on the left side of lens. Pry lens to the
side and swing down as it unhooks from housing
(Fig. 4). (2) Replace lamp as necessary.
(3) Position lens with the center tabs on the left
side of lens snap into place. The lens are identified
with L and R on the reverse side. Do not reverse the
lens or it may damage the lens tabs.
POWER SUNROOF SWITCH/BEZEL REMOVAL
(1) Remove console, refer to Overhead Reading/
Courtesy Lamp Console Replacement. (2) Disconnect switch wiring connector from re-
taining bracket. (3) Pry switch out of bezel. Replace switch. If nec-
essary, push carefully at top closest to roof of bezel to
disengage trim bezel and pivot bezel out of housing. (4) Replace switch.
(5) For installation reverse above procedures.
OVERHEAD READING/COURTESY LAMP CONSOLE
The two reading/courtesy lamps are actuated by
pressing on the switch (Fig. 7):
² Courtesy lamps for when a door is opened
² Illuminated entry system is activated
² Headlamp switch is turned fully clockwise
The map lamp console also includes:
² A cubby storage bin. ²
Power sunroof switch, if equipped.
READING/COURTESY LAMP CONSOLE
REMOVAL
(1) Remove screws from visor tip-pin retainers.
(2) Slide console forward until free from retainer
bracket. (3) Disconnect wiring.
(4) For installation reverse above procedures. For
vehicles equipped with sunroof, avoid sliding console
to install. Install screws for console attachment and
push at rear of unit to snap over mounting bracket
for engagement.
LAMP/LENS REMOVAL
(1) Remove lens by inserting a flat blade tool be-
tween the round end of lamp lens and housing. Pry
lens from the housing. Pivot the lens and remove
(Fig. 7). (2) Replace lamp as necessary.
(3) Position lens into housing by locating lens
pivot and snap into place.
OVERHEAD CONSOLE WIRING HARNESS REMOVAL
(1) Remove console, refer to Overhead Reading/
Courtesy Lamp Console Removal. (2) Disconnect wiring connector from retaining
bracket. (3) Remove four screws attaching lamp housing to
console bezel. (4) Remove wiring and lamp housing.
(5) Remove lamp and replace assembly.
(6) For installation, reverse above procedures.
Fig. 6 EVIC Overhead Console Connector
Fig. 7 Reading/Courtesy Lamp Console
Ä OVERHEAD CONSOLE 8C - 11

AG AND AJ BODIES INDEX
page page
Ambient Temperature Sensor Removal ......... 20
Compass Calibration ...................... 16
Compass Diagnostics ...................... 18
Compass Module Replacement .............. 20
Demagnetizing Procedure .................. 17
Electronic Vehicle Information Center (EVIC) ..... 13
Electronic Vehicle Information Center (EVIC) Removal .............................. 20 Engine Compartment Node (ECN)
............ 15
Engine Compartment Node Compass Calibration . 16
Engine Node Sensor Removal ............... 20
Map Reading Lamps ...................... 13
Overhead Console Replacement ............. 20
Thermometer and Compass ................. 16
Variance Procedure ....................... 17
MAP READING LAMPS
The map lamps are actuated by pressing on the lens.
These same lamps also serve as courtesy lamps when-
ever a door is opened. The illuminated entry system is
activated, or the headlamp switch is turned fully
clockwise (Fig. 1).
LAMP REPLACEMENT
(1) Remove lens by inserting a screw driver or knife
blade into slot located along-side of lens. Once screw-
driver is inserted pry lens to the side and swing down
as it unhooks from housing edge. (2) Remove lamp by pulling straight down.
(3) Install new lamp by pushing firmly into recep-
tacle. (4) Snap lens into position taking care to orient the
tabs on the lens with the slots in the housing.
LAMP TEST
(1) Close vehicle doors.
(2) Press each lamp switch. Right hand switch
should light passenger lamp and left hand switch
should light drivers lamp. (3) If either of the lamps fail to illuminate, open
vehicle doors. (a) If lamp does not illuminate check for a burned
out lamp. (b) If lamp illuminates when doors are open check
switch and wiring.
ELECTRONIC VEHICLE INFORMATION CENTER
(EVIC)
The Electronic Vehicle Information Center is a com-
puter controlled warning system which, monitors vari-
ous sensors used on the vehicle. The system supple-
ments the warning indicators in the instrument
cluster. Visual warning messages are displayed by a
digital display (Fig. 2).
When a warning message has been activated, a tone
will sound to attract the driver's attention. The warn-
ing message will then be displayed on the EVIC center
until the condition is corrected or a new display func-
tion is called up. A tone will announce each new
warning condition. For complete diagnostic procedures for the EVIC
systems, refer to the Body-Chassis Diagnostic Test
Procedures Manual. The EVIC has a 24 function system that provides the
driver with visual messages when a warning con-
Fig. 1 Overhead Console Lamp Replacement
Fig. 2 EVIC
Ä OVERHEAD CONSOLE 8C - 13

dition exists. These messages are displayed on the
center of the instrument panel.For complete EVIC operating instructions, refer to
the Owners Manual provided with the vehicle.
EVIC BUTTON FUNCTIONS
TIME button will display:
² Time of day
² Day of week
² Day of month
² Month of year
² To set HOURS, press TIME button and within four
seconds press the SET button. An arrow will appear
on the display and point to the hours. Press and hold
the SET button to advance the hours or INFO button
to set back the hours.
² To set MINUTES, press TIME button. The arrow
will point to the minutes. Press and hold the SET
button to advance the minutes or INFO button to set
back the minutes.
² To set DAY of WEEK, press TIME button. An ar-
row will appear on the display and point to the Day.
Press and hold the SET button to move the day for-
ward or INFO button to move it backward.
² To set DAY of MONTH, press TIME button. The
arrow will point to Date. Press and hold the SET
button to advance the date or INFO button to move
it backwards.
² To set MONTH of YEAR, press TIME button. The
arrow will point to the Month. Press and hold the
SET button to advance the Month forward or INFO
button to move backward. TEMP button, pressing the Temp button will dis-
play:
² The temperature outside the vehicle
² Vehicle direction define by an eight point compass
If Compass has lost calibration or not receiving
good information from the engine compartment node,
an asterisk (*) will flash on the display and the word
calibrate will appear. Refer to Compass Calibration. FUEL BUTTON, WILL DISPLAY:
² Pressing FUEL button the first time will show, the
estimated number of miles that can be driven with
the remaining fuel. The destination to empty indica-
tion will vary every few seconds as the amount of
fuel and fuel efficiency is calculated. This function
can not be reset.
² Pressing the FUEL button second time; will dis-
play the fuel consumed.
² Pressing the FUEL button third time; will display
the average fuel economy in miles per gallon since
last reset. The display will be updated every 16 sec-
onds.
² Pressing the FUEL button forth time, the current
fuel economy will be displayed. The current fuel
economy will be up updated every two seconds. ²
To reset Fuel consumed, press SET button until
the fuel consumed message is displayed and then
within five seconds press SET button.
² To reset AVERAGE FUEL ECONOMY, press the
FUEL button until average fuel economy is displayed
and within five seconds press SET button. TRIP RESET, press FUEL button and wait four
seconds press the SET button twice. This clears all
trip information and the message Trip Reset will be
displayed. This will occur only if a reset function is
currently being displayed. The reset functions:
² Fuel consumed
² Average fuel economy message
INFO button, will active a MONITORED SYS-
TEMS OK message on display if all monitored sys-
tems are operating properly. If a problem is detected,
the appropriate message will be displayed. SET button, will clear the various functions after
they have been displayed. It is used to enter the
clock set or compass variance modes. This button is
also used to reset certain trip computer functions and
the maintenance reminder message. The EVIC display may be turned off by pressing
the TIME and SET buttons at the same time. Press-
ing the buttons a second time will restore the dis-
play.
EVIC INFORMATION SOURCES
The EVIC monitors information provided by the
body controller, engine compartment node and pow-
ertrain control module. Refer to Body Diagnostic Test
Procedure Manual for test procedures. The Body Controller is a micro-controller unit
which, informs the EVIC via the CCD bus of:
² Time of day
² Day of week
² Day of month
² Month of year
² Fuel range
² Fuel consumed
² Fuel efficiency
² Warning messages as noted in Fig. 3.
The Engine Compartment Node is a microcomputer
controlled unit which, informs the EVIC via the CCD
bus of:
² Outside temperature
² Compass direction
THE FOLLOWING ARE WARNING MESSAGES:
² Low brake fluid
² Low coolant level
² Low engine oil level
The powertrain control module is a microcomputer
controlled unit which, informs the EVIC via the CCD
bus of the following warning messages:
² Engine temperature high
² Voltage improper
8C - 14 OVERHEAD CONSOLE Ä

VISUAL MESSAGES
Following are the visual messages and the condi-
tions under which, the messages will be given:
² Keys in ignition
² Exterior lamps on
These messages will appear if the conditions are
present and the driver's door is open while the igni-
tion switch is in the OFF, LOCK, or ACC positions.
A tone will sound until the condition is corrected or
the door is closed.
² Passenger door ajar
² Driver door ajar
² Trunk ajar
² Park brake engaged
² Right rear door ajar
² Left rear door ajar
These messages will appear if a condition is de-
tected after the vehicle is in motion. When the con-
dition is corrected, a short tone will sound to
acknowledge the action. LOW OIL PRESSURE
If this message is displayed while the vehicle is at
cruising speeds, immediate attention is required. If
this message appears at idle speed, increase the idle
speed and the message should go off. If the message
remains on, immediate attention is required. ENGINE TEMP CRITICAL
This message appears when a sensor has deter-
mined that the engine coolant is overheating. If this
message comes on and stays on, immediate action is
required. COOLANT LEVEL LOW
LOW FUEL LEVEL
LOW BRAKE FLUID WASHER FLUID LOW
These messages will appear if a continuous warn-
ing condition is detected while the engine is running.
Inspection is required. To clear this message from
the display, after the condition is corrected, the igni-
tion switch must be turned OFF. CHECK TRANS
This message will appear if a continuous warning
condition is detected while the engine is running. Im-
mediate attention is recommended. To clear this mes-
sage from the display, after the condition has been
corrected, the ignition switch must be turned OFF. VOLTAGE IMPROPER
This message will appear if a continuous warning
condition is detected. Immediate attention is re-
quired. To clear this message from the display, after
the condition has been corrected, the ignition switch
must be turned OFF. TURN SIGNAL ON
This message will appear if the turn signal is left
on while vehicle speed is over 15 mph and the vehi-
cle has traveled over one-half mile. FASTEN SEAT BELTS
An intermittent chime tone will sound for several
seconds if the seat belt is not fastened. CHK ENGINE OIL LEVEL
If this message is delivered, a check of the engine
oil dipstick is suggested. To clear this message, after
the condition is corrected, the ignition switch must
be turned OFF. HEADLAMP OUT
BRAKE LAMP OUT
TAIL LAMP OUT
These conditions are monitored only when the
lamps are on. The message will remain, even after
the lamp is replaced, until the lamp is turned on and
operates. SERVICE REMINDER
The maintenance reminder statement is pro-
grammed to provide general information only. Refer
to Group 0, Lubrication & Maintenance for specific
vehicle requirements. The service reminder message is displayed at 7,500
miles or 12 months intervals, which ever comes first. MONITORED SYSTEMS OK
If there is no warning condition to report, the mes-
sage Monitored Systems OK is displayed (Fig. 3).
ENGINE COMPARTMENT NODE (ECN)
The Engine Compartment Node is a microcomputer
controlled unit which, informs the Electronic Vehicle
Information Center (EVIC) via the CCD bus of:
² Outside temperature
² Compass direction
and the following warning messages:
² Low Brake Fluid
² Low Coolant Level
² Low Engine Oil Level
Fig. 3 EVIC Messages and Sensors
Ä OVERHEAD CONSOLE 8C - 15

(4) Drive the vehicle 1 to 3 complete circles. The
CAL light will then go off, showing the compass is
calibrated. If the compass portion of the display:
² It does not display.
² Readings are not accurate after calibration.
² The vehicle may have too much magnetism for the
compass to be accurate.
² The compass circuitry is not working properly.
² Refer to Variance Procedure, Demagnetizing Pro-
cedure and/or Compass Diagnostics.
VARIANCE PROCEDURE
Variance is the difference between magnetic North
and geographic North. In some areas the difference
between magnetic and geographic North is great
enough to cause the compass to give false readings. If
this occurs, the variance must be set. To set the variance, depress and hold down both
the Comp/Temp button and the U.S./Metric button.
The display will go off and after 5 seconds the VAR
light will come on. Release both buttons. Using the
zone map (Fig. 5) to find your geographic location,
note the zone which, you are in. Press the U.S./Met-
ric button until the zone number appears on the dis-
play. Press the Comp/Temp button to enter your zone
number. Do not attach magnetic devices, such as magnetic
CB antennas to the vehicle roof, as they can cause
the compass to give false readings.
DEMAGNETIZING PROCEDURE
Every vehicle has its own magnetic field. This
magnetic field is created by the various processes a
steel roof goes through when the vehicle is built. A
magnetic field also can be created if the roof is sub-
jected to a magnet, example:
² Magnetic c.b. antenna
² Magnetic tipped screwdriver and etc.
If the roof becomes magnetized use a demagnetizer
tool 6029 to demagnetize the roof. In this demagnetizing procedure you will use the
demagnetizing tool to demagnetize the roof and
mounting screws in the overhead console. It is impor-
tant that you follow the instructions below exactly.
The mounting screws and the mounting brackets
around the compass area are steel, and therefore aid
in the demagnetizing of the roof panel. (1) Be sure the ignition switch is in the OFF posi-
tion before you begin the demagnetize procedure. (2) Open the sun glass compartment to gain access
to the overhead console mounting screws. (3) Plug the demagnetizing tool into a standard
110/115 volt AC outlet, keeping the demagnetizing
tool at least 12 inches away from the compass area
when plugging it in. (4) Slowly approach the console mounting screw
with the plastic coated tip of the tool for at least 2
seconds. (5) With the demagnetizing tool still energized,
slowly back it away from the screw until the tip is at
least 12 inches from the screw head. (6) After you have pulled at least 12 inches from
the last screw, remove the demagnetizing tool from
inside of the vehicle and disconnect it from the elec-
trical outlet. (7) Place an 8 1/2 X 11 inch piece of paper length-
wise on the roof of vehicle directly above compass.
The purpose of the paper is to protect the roof panel
from scratches and define the area to be demagne-
tized. (8) Plug in the demagnetizing tool, keeping it at
least 2 feet away from the compass unit. (9) Slowly approach the center of the roof panel at
the windshield with the demagnetizing tool plugged
in. (10) Contact the roof panel with the tip of the tool.
Using slow sweeping motions of 1/2 inch between
sweeps. Move the tool approximately 4 inches either
side of the centerline and at least 11 inch back from
the windshield. (11) With the demagnetizing tool still energized,
slowly back away from the roof panel until the tip is
at least 2 feet from the roof before unplugging the
tool.
Fig. 5 Variance Zone Map
Ä OVERHEAD CONSOLE 8C - 17

OVERHEAD CONSOLE REPLACEMENT
(1) Unscrew the mounting screw in sun glass bin
compartment (Fig. 8).
(2) Slide console forward toward windshield until
the console unhooks from roof bracket. (3) Disconnect wire harness from console.
(4) For installation reverse above procedures.
COMPASS MODULE REPLACEMENT
(1) Remove overhead console.
(2) Using a small screwdriver, release the 2 snaps
at rear of compass module (Fig. 9).
(3) After releasing the 2 snaps, slide compass mod-
ule rearward until free of mounting bar. (4) For installation reverse above procedures.
ELECTRONIC VEHICLE INFORMATION CENTER
(EVIC) REMOVAL
(1) Use a straight edge tool to pry out one end of
the EVIC center and continue to disengage six clips
along the length of the message center. (2) Remove the EVIC center and disconnect the
wiring. (3) For installation reverse the above procedures.
AMBIENT TEMPERATURE SENSOR REMOVAL
(1) Raise and support vehicle on safety stands.
(2) From behind front bumper fascia, remove screw
attaching sensor to radiator closure panel (Fig. 10).
(3) For installation, reverse above procedures.
ENGINE NODE SENSOR REMOVAL
(1) Raise and support vehicle on safety stands.
(2) From behind front bumper fascia, remove
screws attaching engine node to bumper fascia (Fig.
11). (3) For installation, reverse above procedures.
Fig. 8 Overhead Console Mounting
Fig. 9 Compass Module Removal
Fig. 10 Ambient Temperature Sensor
Fig. 11 Engine Node
8C - 20 OVERHEAD CONSOLE Ä

(3) Plug the demagnetizing tool into a standard
110/115 volt AC outlet, keeping the demagnetizing
tool at least 12 inches away from the compass area
when plugging it in. (4) Slowly approach the console mounting screw
with the plastic coated tip of the tool for at least 2
seconds. (5) With the demagnetizing tool still energized,
slowly back it away from the screw until the tip is at
least 12 inches from the screw head. (6) After you have pulled at least 12 inches from
the last screw, remove the demagnetizer tool from in-
side of the vehicle and disconnect it from the electri-
cal outlet. (7) Place an 8 1/2 X 11 inch piece of paper length-
wise on the roof of vehicle directly above compass.
The purpose of the paper is to protect the roof panel
from scratches and define the area to be demagne-
tized. (8) Plug in the demagnetizing tool, keeping it at
least 2 feet away from the compass unit. (9) Slowly approach the center of the roof panel at
the windshield with the demagnetizing tool plugged
in. (10) Contact the roof panel with the tip of the tool
and using slow sweeping motions of 1/2 inch between sweeps. Move the tool approximately 4 inches either
side of the centerline and at least 11 inches back
from the windshield. (11) With the demagnetizing tool still energized,
slowly back away from the roof panel until the tip is
at least 2 feet from the roof before unplugging the
tool. (12) Recalibrate compass.
COMPASS DIAGNOSTICS
To place the unit into the diagnostics mode, turn
the vehicle ignition off. Depress the Comp/Temp but-
ton while turning on the ignition/run switch. The
display will then show DO. There are 3 tests that
can be performed when in the diagnostics mode.
Press the U.S./Metric button to choose test desired.
Refer to Fig. 4 and 5.
Test 1 (d1) determines the magnetic field strength
at the compass. The compass displays compensation
numbers which, correspond to the current magnetic
field strength at the compass. The letter N is dis-
played in the compass portion of the display. While a
number which, corresponds to the magnetic field
strength in the North/South direction is displayed.
The temperature portion of the display or the letter
W is displayed in the compass portion of the display.
A number which, corresponds to the magnetic field
strength in the East/West direction is displayed in
the temperature portion of the display. For proper
compass operation the numbers should be between 1
and 14. A number of 7 or 8 is ideal (no vehicle mag-
netism) while numbers approaching 1 or 14 show
that the vehicle is highly magnetic. If the numbers
show that the vehicle is highly magnetic, perform
the demagnetized procedure in this Group and retest
for magnetism at compass. If the numbers show that
the vehicle is highly magnetic, perform the demagne-
tizing procedure in this section and retest for magne-
tism at compass. The compass is not on the CCD bus,
if not functioning properly, refer to the Overhead
Console and Thermometer diagnosis. Test 2 (d2) checks the electronic circuits of the
compass, temperature, and CCD bus. If the test
passes d2 will be displayed, and if the test fails F2
will be displayed. Refer to AG and AJ Body Diagnos-
tic Procedure Manual for further testing procedures.
Fig. 3 Variance Zone MapFig. 4 Overhead Console Connector
Ä OVERHEAD CONSOLE 8C - 23