NS OVERHEAD CONSOLE 8V - 1
OVERHEAD CONSOLE
TABLE OF CONTENTS
page page
DESCRIPTION AND OPERATION
COMPASS MINI - TRIP COMPUTER
SELF-DIAGNOSTIC TEST..................1
COMPASS MINI-TRIP COMPUTER (CMTC).....1
THERMOMETER AND COMPASS.............2
UNIVERSAL TRANSMITTER.................2
DIAGNOSIS AND TESTING
READING/DOME LAMP DIAGNOSIS ..........3
TRAVELER MESSAGES.....................3
UNIVERSAL TRANSMITTER.................4
SERVICE PROCEDURES
COMPASS CALIBRATION PROCEDURE........4
COMPASS CALIBRATION PROCEDURE (FAST
METHOD)..............................4
DEMAGNETIZING PROCEDURE ..............5
DESCRIPTION AND OPERATION
COMPASS MINI - TRIP COMPUTER SELFDIAGNOSTIC TEST
The Compass Mini - Trip Computer (CMTC) is
capable of performing a diagnostic self check on
many of its internal functions. CMTC diagnostics
may be performed using a DRB lllt scan tool and the
proper Body Diagnostic Procedures Manual or by the
following procedure.
(1) With the ignition switch in the OFF position,
press both the US/M and STEP button.
(2) Turn ignition switch to the ON position.
The CMTC will perform internal checks while
lighting all segments of the vacuum florescent display. Upon completion of the internal check, the
CMTC will display.
• PASS
• FAIL
• CCd
If any segment of the CMTC fails to light replace
the module.
If FAIL is displayed, replace the module.
If CCd is displayed, check the CCD and Body Control Module (BCM) for proper operation, refer to the
appropriate diagnostic test procedures manual If the
CCD and the BCM are OK, replace the CMTC module.
For additional diagnostic information on the CMTC
and for identifying CMTC problems, refer to the
proper Body Diagnostic Procedures Manual.
UNIVERSAL TRANSMITTER.................5
REMOVAL AND INSTALLATION
AMBIENT TEMPERATURE SENSOR...........6
COMPASS MINI-TRIP COMPUTER (CMTC)
MODULE ..............................6
COMPASS MINI - TRIP COMPUTER (CMTC)
LAMP BULBS ..........................6
FRONT HEADER READING/COURTESY LAMP...7
OVERHEAD CONSOLE .....................7
READING / COURTESY LAMP ...............7
READING / COURTESY LAMP ASSEMBLY......8
UNIVERSAL TRANSMITTER.................9
SPECIAL TOOLS
OVERHEAD CONSOLE .....................9
COMPASS MINI-TRIP COMPUTER (CMTC)
DESCRIPTION
Fig. 1 Compass Mini-Trip Computer (CMTC)
Switches and Display
1 – OVERHEAD CONSOLE
2 – DISPLAY
The Compass Mini-Trip Computer (CMTC) system
is located in the overhead console. CMTC consists of
a electronic control module with a vacuum fluorescent display (VFD) and function switches. The CMTC
consists of a electronic module that displays compass,
8V - 2 OVERHEAD CONSOLE NS
DESCRIPTION AND OPERATION (Continued)
trip computer, and temperature features. Actuating
the STEP switch will cause the CMTC to change
mode of operation when ignition is ON. Example:
• Compass/Temperature
• Trip odometer (ODO)
• Average miles per gallon (ECO)
• Instant miles per gallon (ECO)
• Distance to empty (DTE)
• Elapsed time (ET)
• Off
OPERATION
The CMTC module in the overhead console has
three buttons used to select various functions. The
CMTC selector buttons will not operate until the
ignition is in the RUN position.
When the ignition switch is first turned to the
RUN position the CMTC display;
• Blanks momentarily
• All segments of the VFD will light for one sec-
ond
• Blanks momentarily
• Returns to the last mode setting selected before
the ignition was last switched OFF.
THERMOMETER AND COMPASS
Moderate magnetic shifts may, on very rare occasions, cause the compass heading to display only one
or two of the eight possible headings. Although the
compass will eventually compensate for this shift, it
could take several ignition cycles. The compensation
process can be expedited by manually activating the
fast calibration routine. Refer to the fast calibrating
procedure in this section. This procedure may be performed anytime that the compass appears to be inaccurate.
If the calibration data stored in the body control
module is not received, the compass will read only
NE North-East. The CMTC is self calibrating and
requires no adjusting. The word CAL is displayed to
show that the compass is in calibration mode. CAL
will turn off after the vehicle has gone through three
complete circles without stopping, in an area free of
magnetic disturbance. If module displays temperature while the compass is blank, turn off ignition and
run self diagnostics then demagnetize the vehicle. If
problem persists, then demagnetize vehicle.
UNIVERSAL TRANSMITTER
DESCRIPTION
THERMOMETER
Engine temperature can increase the displayed
temperature. The CMTC is designed to dampen temperature readings when the vehicle is moving at a
rate slower than 18 miles per hour.
The outside temperature is measured from a sensor mounted in the front of the vehicle. If the temperature is more than 55°C (131°F) or the
temperature sending line is shorted to ground, the
temperature display should read SC. If the temperature is less than -40°C (-40°F), or the sending line is
an open circuit, the display should read OC.
The CMTC will not allow the temperature reading
to increase when the vehicle is not moving.
COMPASS
The CMTC is self calibrating and usually requires
no adjustment. The compass will continuously perform a slow calibration to compensate for small magnetic variations common to any automobile.
Uncommon magnetic shifts may be caused by items
such as magnetic base antennas, which can permanently alter the magnetic field of the vehicle roof
panel. If excessive magnetic field continues for 5 minutes, the compass heading will go blank and only the
CAL symbol will illuminate. When this occurs, the
vehicle roof panel may require demagnetizing. Refer
to the demagnetizing procedure in this section.
Fig. 2 Universal Transmitter Location
The Universal Transmitter, replaces the hand held
remote controls that open the garage door, motorized
gates, or home lighting in/outside the home. This
device memorizes the activator codes for up to three
remote controlled devices. It triggers those devices at
the push of a button, located in a unit permanently
mounted in your overhead console (if equipped).
OPERATION
The transmitter operates off your vehicle’s battery
and charging system; no batteries are needed.
NS OVERHEAD CONSOLE 8V - 3
DESCRIPTION AND OPERATION (Continued)
The Universal Transmitter incorporates a Rolling
Code technology (random digital code signals from
the remote transmitter) within the transmitter module. This is done so, as an added security measure.
Features of the Universal Transmitter are:
• Can be used with most other Radio Frequency
(RF) activated devices.
• Individual channels can be trained.
• Stores transmitter data in permanent memory -
retraining is not required even if the battery dies or
is disconnected.
To operate, simply press the appropriate button on
the Universal Transmitter. The red LED will light up
while the signal is being transmitted.
NOTE: For security reasons, you are able to erase
the trained frequencies.
DIAGNOSIS AND TESTING
READING/DOME LAMP DIAGNOSIS
The dome lamps operate in conjunction with the
Remote Keyless Entry system. Refer to the Wiring
Diagrams group of this manual for component locations and circuit information. For additional diagnos-
tic information on lamp operation controlled by Body
Control Module (BCM) refer to the Body Diagnostic
Procedures Manual. For diagnosis of the reading
lamps and switches refer to (Fig. 3).
TRAVELER MESSAGES
Traveler data is obtained from the Body Control
Module (BCM) on the CCD bus wires. The CMTC
will not display information for any of the screens for
which it did not receive the bus messages. The label
corresponding to the missing information will be lit.
If no traveler data is displayed, check the CCD bus
communications and the BCM. If the brightness level
is improper check the CCD bus. One general method
for checking the CCD bus communications between
CMTC and the BCM is refer to the following procedure.
(1) STEP the CMTC to the Elapsed Time (ET).
(2) Press and release the reset button to reset the
module.
(3) If the elapsed time clock does not reset, or fails
to update, check the CCD bus wires and the BCM.
The DRB lllt is recommended for checking the CCD
bus and the BCM.
(4) Perform the CMTC self diagnosis before replacing the CMTC.
Fig. 3 Reading/Dome Lamp Diagnosis
8V - 4 OVERHEAD CONSOLE NS
DIAGNOSIS AND TESTING (Continued)
UNIVERSAL TRANSMITTER
Before proceeding in diagnosis, check the transmitter for battery voltage and a good ground at the
transmitter harness connector.
• The unit may not have been trained correctly,
try retraining the transmitter.
• The batteries in the hand-held transmitter may
be dead.
• Rotate your hand-held transmitter end-over-end
and train again. For best results, place the end opposite from the battery compartment against the universal transmitter while training.
• The frequency of the hand-held transmitter may
not be in the desired frequencies between 286MHz
and 399MHz set by FCC.
SERVICE PROCEDURES
COMPASS CALIBRATION PROCEDURE
Variance is the difference between magnetic North
and geographic North (Fig. 4). To adjust the compass
variance set the CMTC to Compass/Temperature
mode and press RESET buttons for 5 seconds. The
symbol VAR and the current variance zone number
will be displayed. Press the STEP button to select
the proper variance zone as shown in (Fig. 4). Press
the US/Metric button to save the new variance zone
and normal CMTC operation. If the RESET button is
held for 10 seconds instead 5 seconds the CMTC will
set variance to 8 and enter the fast calibration mode.
COMPASS CALIBRATION PROCEDURE (FAST METHOD)
When the compass is subjected to excessive magnetic fields, the CMTC automatically enters a fast
calibration mode where is tries to compensate for the
large magnetic shifts.
If the compass is inaccurate, appears to be inaccurate and the CAL is not illuminated the fast calibration mode may be manually entered by using the
following procedure.
(1) Set the CMTC to Compass/Temperature mode
and press the reset button for 10 continuous seconds.
Manual activation of the fast calibration is generally
not required.
(2) Compass variance sets to the default of 8 after
the fast calibration is manually activated.
(3) Complete the compass variance setting procedure by referring to the Compass Variance Procedure
in this section
(4) Drive the vehicle in three 360° turns in an area
free from large metal objects. If the CAL symbol
remains lit after completing this step, the roof panel
may need demagnetizing
Fig. 4 Variance Settings
NS OVERHEAD CONSOLE 8V - 5
SERVICE PROCEDURES (Continued)
DEMAGNETIZING PROCEDURE
A magnetic field can adversely affect the compass.
Magnetic interference can magnetize the roof panel.
Magnetizing can be caused by placing a permanent
magnet in contact with the roof panel. Example:
• Magnetic Base Antenna
• Magnetic screwdriver
• Audio speakers
• Refrigerator magnets.
• Pizza Signs
• Bubble gum flasher lights
Removing magnetic interfering objects will usually
restore normal compass operation. If the compass
display remains blank while the CAL label is illuminated, then the roof panel requires demagnetizing. To
demagnetize use Special Tool 6029 for demagnetizing
the roof panel. The demagnetizing procedure will
demagnetize the roof and mounting screws in the
overhead console. It is important 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 position before you begin the demagnetize procedure.
(2) 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.
(3) Slowly approach and contact the console
mounting screw with the plastic coated tip of the tool
for at least two seconds.
(4) 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.
(5) Repeat the last step with all the console
mounting screws.
(6) After you have pulled at least 12 inches from
the last screw, remove the demagnetizing tool from
inside vehicle and disconnect it from the electrical
outlet.
(7) Place an 8 1/2 X 11 inch piece of paper lengthwise 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 demagnetized.
(8) Plug in the demagnetizing tool, keeping it at
least two 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 four inches
either side of the center line 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 two feet from the roof before unplugging the
tool.
(12) Recalibrate compass, refer to the compass calibration procedure in this section.
UNIVERSAL TRANSMITTER
TRAINING
(1) Turn off the engine.
(2) Erase the factory test codes by pressing the
two outside buttons. Release the buttons when the
red light begins to flash (about 20 seconds).
(3) Choose one of the three buttons to train. Place
the hand-held transmitter within one inch of the universal transmitter and push the buttons on both
transmitters. The red light on the universal transmitter will begin to flash slowly.
(4) When the red light on the universal transmitter begins to flash rapidly (this may take as long as
60 seconds), release both buttons. Your universal
transmitter is now “trained”. To train the other buttons, repeat Step 3 and Step 4. Be sure to keep your
hand-held transmitter in case you need to retrain the
universal transmitter.
Fig. 5 Universal Transmitter
ERASING
To erase the universal transmitter codes, simply
hold down the two outside buttons until the red LED
begins to flash.
NOTE: Individual channels cannot be erased. Erasing the transmitter codes will erase ALL programmed codes.
8V - 6 OVERHEAD CONSOLE NS
REMOVAL AND INSTALLATION
AMBIENT TEMPERATURE SENSOR
REMOVAL
(1) Disconnect and isolate the battery negative
cable (Fig. 6).
Fig. 7 Compass Mini-Trip Computer
1 – CMTC MODULE
2 – OVERHEAD CONSOLE
COMPASS MINI - TRIP COMPUTER (CMTC) LAMP BULBS
Fig. 6 Negative Battery Cable
1 – PDC
2 – POSITIVE
3 – NEGATIVE
(2) Raise and support vehicle on safety stands.
(3) From behind front bumper fascia, remove
screw holding sensor to radiator closure panel.
(4) Remove sensor from vehicle.
INSTALLATION
For installation, reverse the above procedures.
COMPASS MINI-TRIP COMPUTER (CMTC) MODULE
REMOVAL
(1) Disconnect and isolate the battery negative
cable (Fig. 6).
(2) Remove overhead console. Refer to Overhead
Console Removal and Installation in this section.
(3) Remove the six screws holding CMTC module
to overhead console (Fig. 7).
(4) Remove CMTC module from console.
REMOVAL
(1) Disconnect and isolate the battery negative
cable (Fig. 6).
(2) Remove overhead console. Refer to Overhead
Console Removal and Installation in this section.
(3) Rotate bulb socket counterclockwise one quarter turn (Fig. 8).
Fig. 8 CMTC Lamp Bulbs
1 – CMTC MODULE
2 – BULB
3 – CIRCUIT BOARD COVER
INSTALLATION
For installation, reverse the above procedures.
(4) Pull bulb socket from CMTC module.
INSTALLATION
For installation, reverse the above procedures.
NS OVERHEAD CONSOLE 8V - 7
REMOVAL AND INSTALLATION (Continued)
FRONT HEADER READING/COURTESY LAMP
REMOVAL
(1) Disconnect and isolate the battery negative
cable.
(2) Place a small flat tool in the slot at the forward
edge of the lamp lens and twist.
(3) Remove lens.
(4) Insert the tip of the tool under the inside, rear
edge of the reflector/light shield. Carefully pry reflector/light shield out.
(5) Remove the lamp by pressing forward the brass
terminal and rotating the lamp clockwise to remove.
Fig. 10 Overhead Console
1 – ENGAGEMENT TAB
2 – HEADLINER
3 – EYEGLASS BIN
4 – OVERHEAD CONSOLE
5 – TRANSMITTER BIN
6 – SCREW
Fig. 9 Front Header Reading/Courtesy Lamp
Remove/Install
INSTALLATION
For installation, reverse the above procedures.
When installing the lamp lens, first guide the switch
contact tab on the lens between the lamp switch
plunger and the lamp bezel. Then snap lens onto the
two lens pivots on the bezel.
OVERHEAD CONSOLE
REMOVAL
(1) Disconnect and isolate the battery negative
cable (Fig. 6).
(2) Open the transmitter bin door (Fig. 10).
(3) Remove screw holding the overhead console to
the headliner. With the screw removed the console is
retained by one engagement tab located inside the
eyeglass storage bin.
(4) Open the eyeglass bin door.
(5) Press the retaining tab which is located
directly above the door latch.
(6) Lower rear of console away from headliner.
(7) Pull console rearward to disengage clips holding front of console to roof armature and lower console.
(8) Disconnect wire connectors from back of CMTC
and reading lamps. Ensure the connectors lock tabs
are fully depressed before disconnecting.
(9) Remove overhead console.
INSTALLATION
For installation, reverse the above procedures.
READING / COURTESY LAMP
Removal
(1) Disconnect and isolate the battery negative
cable (Fig. 6).
(2) Using a trim stick (special tool #C-4755),,
lightly pry outward the forward end of reading lamp
lens (Fig. 11).
(3) Rotate reading / courtesy lamp socket one quarter turn counterclockwise.
(4) Pull socket out of lamp (Fig. 12).
(5) Pull lamp from socket.
Installation
For installation, reverse the above procedures.
When installing the lamp lens, first guide the switch
contact tab on the lens between the lamp switch
plunger and the lamp bezel. Then snap lens onto the
two lens pivots on the bezel.
8V - 8 OVERHEAD CONSOLE NS
REMOVAL AND INSTALLATION (Continued)
Fig. 11 Reading / Courtesy lamp lens
1 – SWITCH CONTACT TAB
2 – SOCKET
3 – PIVOTS
4 – PRY HERE
5 – LOCKS
6 – OVERHEAD CONSOLE
7 – LENS
Fig. 13 Reading / Courtesy Lamp
1 – LENS
2 – READING LAMP
3 – OVERHEAD CONSOLE
(4) Remove the lamp from the overhead console.
(5) Disconnect the wire connectors from the back
of the reading lamp (Fig. 14).
Fig. 12 Socket and Lamp
1 – READING LAMP
2 – BULB
3 – SOCKET
READING / COURTESY LAMP ASSEMBLY
Removal
(1) Disconnect and isolate the battery negative
cable (Fig. 6).
(2) Remove the overhead console. Refer to Overhead Console Removal and Installation in this section.
(3) Remove the screws holding the reading lamp to
the overhead console (Fig. 13).
Fig. 14 Connector and Switch
1 – KEYHOLE SLOT
2 – READING LAMP
3 – SWITCH
(6) Disconnect the reading lamp switch from the
keyhole slot in the reading lamp.
(7) Remove the reading lamp from the overhead
console.
Installation
For installation, reverse the above procedures.
NS OVERHEAD CONSOLE 8V - 9
REMOVAL AND INSTALLATION (Continued)
UNIVERSAL TRANSMITTER
REMOVAL
The Universal Transmitter is serviced with the
transmitter bin door, in the overhead console.
(1) Disconnect and isolate the battery negative
cable (Fig. 6).
(2) Open transmitter bin door in rear of overhead
console.
(3) Gently pull towards rear of vehicle, releasing
transmitter bin door.
(4) Disconnect harness connector from Universal
Transmitter and remove bin door from vehicle.
INSTALLATION
For installation, reverse the above procedures. The
Universal Transmitter will need to be retrained.
Refer to SERVICE PROCEDURES in this section.
SPECIAL TOOLS
OVERHEAD CONSOLE
Degausser 6029
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