1996 CHRYSLER VOYAGER Service Manual

²Stores 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 loca-
tions 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 forwhich 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 com-
munications 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 proce-
dure.
(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 wires and the BCM. The
DRB is recommended for checking the CCD and the
BCM.
(4) Perform the CMTC self diagnosis before replac-
ing the module.
UNIVERSAL TRANSMITTER
Before proceeding in diagnosis, check the transmit-
ter for battery voltage and a good ground at the
transmitter harness connector.
²The unit may not have been trained correctly,
try retraining the transmitter.
²The batteries in the hand-held transmitter may
be dead.
Fig. 3 Reading/Dome Lamp Diagnosis
NSOVERHEAD CONSOLE 8V - 3
DESCRIPTION AND OPERATION (Continued)

²Rotate your hand-held transmitter end-over-end
and train again. For best results, place the end oppo-
site from the battery compartment against the uni-
versal transmitter while training.
²The 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 both buttons are
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 mag-
netic 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 inaccu-
rate and the CAL is not illuminated the fast calibra-
tion 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 proce-
dure by referring to the Compass Variance Procedure
in this section
(4) Drive the vehicle in three 360É 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
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:
²Magnetic Base Antenna
²Magnetic screwdriver
²Audio speakers
²Refrigerator magnets.
²Pizza Signs
²Bubble gum flasher lights
Fig. 4 Variance Settings
8V - 4 OVERHEAD CONSOLENS
DIAGNOSIS AND TESTING (Continued)

Removing magnetic interfering objects will usually
restore normal compass operation. If the compass
display remains blank while the CAL label is illumi-
nated, 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 posi-
tion 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 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 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 cal-
ibration 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 uni-
versal transmitter and push the buttons on both
transmitters. The red light on the universal trans-
mitter will begin to flash slowly.
(4) When the red light on the universal transmit-
ter begins to flash rapidly (this may take as long as
60 seconds), release both buttons. Your universal
transmitter is now ªtrainedº. To train the other but-
tons, repeat Step 3 and Step 4. Be sure to keep your
hand-held transmitter in case you need to retrain the
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. Eras-
ing the transmitter codes will erase ALL pro-
grammed codes.
REMOVAL AND INSTALLATION
AMBIENT TEMPERATURE SENSOR
REMOVAL
(1) Raise and support vehicle on safety stands.
(2) From behind front bumper fascia, remove
screw holding sensor to radiator closure panel.
(3) Remove sensor from vehicle.
INSTALLATION
For installation, reverse the above procedures.
Fig. 5 Universal Transmitter
NSOVERHEAD CONSOLE 8V - 5
SERVICE PROCEDURES (Continued)