Chrysler PT Cruiser. Manual - part 506

DIAGNOSIS AND TESTING

UNIVERSAL TRANSMITTER

If the Universal Transmitter is inoperative, retrain

the universal transmitter with a known good trans-
mitter, (Refer to 8 - ELECTRICAL/MESSAGE CEN-
TER/UNIVERSAL TRANSMITTER - STANDARD
PROCEDURE) for the proper procedure. Test the
universal transmitter operation again. If the unit is
still inoperative, test the universal transmitter with
Radio Frequency Detector special tool (Fig. 2) as
described below:

(1) Turn the Radio Frequency (RF) Detector ON. A

“chirp” will sound and the green power LED will
light. If the green LED does not light, replace the
battery.

(2) Hold the RF detector within one inch of the

TRAINED universal transmitter and press any of the
transmitters buttons.

(3) The red signal detection LEDs will light and

the tool will beep if a radio signal is detected. Repeat
this test for all three transmitter buttons. If the tool
does not detect a radio signal for any of the three
buttons, replace the inoperative universal transmit-
ter assembly, (Refer to 23 - BODY/INTERIOR/SUN
VISOR - REMOVAL).

STANDARD PROCEDURE

ERASING TRANSMITTER CODES

To erase the universal transmitter codes, simply

hold down the two outside buttons labeled with one
(·) and three (···) dots until the display confirms the
operation.

NOTE: Individual channels cannot be erased. Eras-
ing the transmitter codes will erase ALL pro-
grammed codes.

SETTING TRANSMITTER CODES

(1) Turn off the engine.
(2) Erase the codes by pressing the two outside

buttons labeled with one (·) and three (···) dots.
Release the buttons when the display confirms the
operation (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.

(4) Release both buttons. Your universal transmit-

ter 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 uni-
versal transmitter.

REMOVAL

(1) (Refer to 23 - BODY/INTERIOR/SUN VISOR -

REMOVAL), for universal transmitter removal.

INSTALLATION

(1) (Refer to 23 - BODY/INTERIOR/SUN VISOR -

INSTALLATION), for universal transmitter installa-
tion.

Fig. 2 RADIO FREQUENCY DETECTOR

1 - SIGNAL DETECTION LED’S
2 - POWER LED
3 - ON/OFF SWITCH
4 - 9V BATTERY

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MESSAGE CENTER

UNIVERSAL TRANSMITTER (Continued)

OVERHEAD CONSOLE

TABLE OF CONTENTS

page

OVERHEAD CONSOLE

DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . . . . 3

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

STANDARD PROCEDURE

COMPASS CALIBRATION

. . . . . . . . . . . . . . . . 4

COMPASS VARIATION ADJUSTMENT

. . . . . . . 5

COMPASS DEMAGNETIZING

. . . . . . . . . . . . . 6

REMOVAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . 7

SPECIAL TOOLS

OVERHEAD CONSOLE

. . . . . . . . . . . . . . . . . . 7

AMBIENT TEMP SENSOR

DESCRIPTION

. . . . . . . . . . . . . . . . . . . . . . . . . . 7

OPERATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

DIAGNOSIS AND TESTING

AMBIENT TEMPERATURE SENSOR

. . . . . . . . 7

REMOVAL

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . 8

OVERHEAD CONSOLE

DESCRIPTION

The overhead console includes the Compass/Tem-

perature read-out and two reading and courtesy
lamps. This display provides the outside temperature
and one of eight compass readings to indicate the
direction the vehicle is facing. The outside tempera-
ture is monitored by the ambient temperature sensor
mounted on the support brace in front of the A/C con-

denser, behind the front grille. The ambient temper-
ature is hardwired directly to the overhead console.
On vehicles equipped with a power sunroof option,
the overhead console also houses the power sunroof
switch between the two reading and courtesy lamps
(Fig. 1). The overhead console is snapped into place
near the front of the vehicle’s roof and clips on the
headliner, at the rear of the overhead console. There
is a STEP button for the compass/temperature read-
out

located

forward

the

sunroof

switch

(if

equipped), and between the map/reading/courtesy
lamps.

The overhead console is equipped with two individ-

ual reading and courtesy lamps. The lamp lenses are
the only visible components of these lamps. The read-
ing and courtesy lamp lenses are mounted near the
rear of the overhead console housing. Each lamp has
its own switch, bulb and lens; but both lamps share a
common lamp housing within the overhead console.
Each lamp is designed and aimed to provide illumi-
nation that will be directed only to that side of the
vehicle on which the lamp is located.

The reading and courtesy lamp lenses and the

lamp housing unit are serviced only as a unit with
the overhead console housing. If either of the lamp
lenses or the lamp housing is faulty or damaged, the
overhead console housing unit must be replaced.

OPERATION

There is a STEP button to display the compass/

temperature, and can be read in either F° or C°.
When the vehicle is first turned ON, you may select
to have the overhead console:

• Blank display

• Compass/Temperature displayed in Fahrenheit

• Compass/Temperature displayed in Celsius
To put the compass/temperature in the F° display,

press the STEP button once. To put the compass/tem-
perature in the C° display, press the STEP button

Fig. 1 PT Overhead Console

1 - OVERHEAD CONSOLE HOUSING
2 - DISPLAY SCREEN
3 - DISPLAY STEP BUTTON
4 - READING/COURTESY LAMPS
5 - HEADLINER

OVERHEAD CONSOLE

8M - 3

twice. A third press of the STEP button will return it
to the blank display.

The overhead console reading and courtesy lamps

operate on battery current that is provided at all
times, regardless of the ignition switch position. The
ground feed for the lamps is switched through the
integral reading and courtesy lamp switches or
through the door jamb switches.

All reading and courtesy lamps located in the over-

head console are activated by the door jamb switches.
When all of the doors are closed, these lamps can be
individually activated by depressing the correspond-
ing lens. When any door is open, depressing the lamp
lenses to activate the lamp switches will not turn the
lamps off.

Each light is turned ON by pressing the lens. Press

the lens a second time to turn the light OFF. The
lights also come ON when a door is opened or the
dimmer switch is turned fully upward, past the sec-
ond detent.

NOTE: The lights will remain ON until the switch is
pressed a second time, so be sure they have been
turned OFF before leaving the vehicle. They will not
turn OFF automatically.

AUTOMATIC COMPASS CALIBRATION

The self calibrating feature of the compass elimi-

nates the need to calibrate the compass for normal
conditions. After approximately 10 ignition cycles the
CAL light will turn ON. The CAL symbol may also
appear after the vehicle is subjected to a high level of
magnetism. After completing three 360° (degree) cir-
cles in an area free from large metal or metallic
objects, the CAL symbol will turn off and the com-
pass will function normally.

MANUAL COMPASS CALIBRATION

If the compass appears to be in the locked up posi-

tion, you may calibrate the compass. Find an open
area away from large metal objects. With the ignition
OFF, press and hold the STEP button while turning
ON the ignition. Release the STEP button and the
CAL light will appear (about 10-15 seconds). Drive in
3 complete 360° (degree) circles. The CAL light will
turn off and the compass will be calibrated.

ZONE VARIANCE

Compass variance, also known as magnetic decli-

nation, is the difference in angle between magnetic
north and true geographic north. In some geographic
locations, the difference between magnetic and geo-
graphic north is great enough to cause the compass
to give false readings. For proper compass function,
the correct variance zone must be set. Refer to the
variance map for the correct variance zone in your

area. To check the variance zone, the ignition switch
must be ON and the compass/temperature displayed.
Press and hold the STEP button for about 5-15 sec-
onds until ZONE appears in the display, then release
the button. The number displayed is the variance
zone set in the compass. To change the zone refer to
the standard procedure later in this section.

OUTSIDE TEMPERATURE

Since the ambient temperature sensor is in close

proximity to the radiator, it can pick up engine heat
giving a false “high” outside air temperature reading
- known as “Heat Soak”. In order to display a more
correct outside temperature, the overhead console
will not increase the displayed temperature until it
detects movement in the compass over a two-minute
period, to insure that there is adequate airflow over
the sensor. “Movement over a two minute period” is
best understood as once in the first minute, then
some more detected movement in the second minute.

If the display shows an open circuit OC ( or -49° F

(-45° C) then there is an OPEN CIRCUIT or a miss-
ing sensor and the condition must be corrected. Keep
in mind that after a repair is made, the vehicle may
need to be driven to update the temperature for the
reasons described above. Even if the engine is cool, it
will not increase from -49°F without detecting move-
ment.

STANDARD PROCEDURE

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 ser-
vicing the overhead console.

The electronic compass features a self-calibrating

design, which simplifies the calibration procedure.
This feature automatically updates the compass cali-
bration 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. If the compass readings appear to
be erratic or out of calibration, perform the following
calibration procedure. Also, new service replacement
compass mini-trip computer modules must have their
compass calibrated using this procedure. Do not
attempt to calibrate the compass near large metal
objects such as other vehicles, large buildings, or
bridges; or, near overhead or underground power
lines.

(1) Start the engine. If the compass/temperature

data is not currently being displayed, momentarily
depress and release the Step push button (this unla-

8M - 4

OVERHEAD CONSOLE

OVERHEAD CONSOLE (Continued)

beled button is located directly behind the overhead
console display screen) to step through the display
options until you have reached the compass/tempera-
ture display.

(2) Depress the Step push button, until “ZONE”

appears in the display (approx. 5-10 seconds), then
“CAL” will be displayed. Release the Step button
when CAL is displayed. The “CAL” in the display
indicates that the compass is in the calibration mode.

(3) Drive the vehicle on a level surface, at least

fifty feet away from large metal objects and power
lines, in all four compass directions, such as driving
around a city block several times or driving in two to
three complete circles at a slow speed (approx. 5
mph) until the CAL is no longer displayed.

(4) Finally, set the proper zone/variance for the

area you are in, when in manual override mode for
calibration, it defaults to zone 8.

NOTE: If the “CAL” message remains in the display,
either there is excessive magnetism near the com-
pass, or the unit is faulty. Repeat the calibration
procedure 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 VARIATION ADJUSTMENT

Compass variance, also known as magnetic decli-

If a customer moves, or drives across zones the

compass variation will have to be reprogrammed so
that the compass will display the correct readings. If
problems like these occur, the compass variance must
be set. Use the following procedure to program the
compass zone variation.

PROGRAMMING ZONE VARIATION

(1) Using the Variance Zone map, find your geo-

graphic location and note the zone number (Fig. 2).

(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
push button to step through the display options until
you have reached the compass/temperature display.

(3) Depress the Step push button and hold down

until the compass mini-trip computer enters the vari-
ation adjustment mode and “VAR” along with the
current variance zone will appear in the display.

(4) Momentarily depress and release the Step push

button to step through the zone numbers, until the
zone number for your geographic location appears in
the display.

Fig. 2 Variance Zones

OVERHEAD CONSOLE

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OVERHEAD CONSOLE (Continued)

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