Chrysler Voyager. Manual — part 150

and EVIC use a vacuum fluorescent (VF) display to
supply the vehicle operator with a compass head-
ing, outdoor temperature, average fuel economy,
distance to empty, instantaneous fuel economy, trip
odometer, elapsed ignition on time, distance to
service, warning messages, and service messages.

The difference between a CMTC and an EVIC is

that only the EVIC provides additional memory,
feature programming, and warning messages. The
EVIC is capable of displaying warning messages
and memory system messages when the vehicle is
equipped with memory systems. The EVIC also
provides the interface to enable and disable vehicle
programmable

features

when

the

vehicle

is

equipped with certain features.

If equipped, the EVIC is also available with an

integrated Universal Garage Door Opener (UGDO)
known as HomeLink

t. Also if equipped, the EVIC is

available with a Tire Pressure Monitoring (TPM)
System. The EVIC may also be equipped with up to
4 power door switches: ON/OFF, Left Sliding Door,
Right Sliding Door, and Liftgate.

The CT function buttons are labeled C/T and

US/M. The CMTC function buttons are labeled
US/M, C/T, RESET, and STEP. The EVIC function
buttons are labeled C/T, RESET, STEP, and MENU.
The three UGDO buttons are labeled with dots to
indicate the channel number.

The BCM supplies most of the information dis-

played by the CMTC/EVIC. Display information,
except for the internal compass function, is received
over the PCI bus. The FCM supplies the ambient
temperature sensor information via the PCI bus.
The CMTC/EVIC sends and receives data over the
PCI bus, communicating with the BCM, PCM,
FCM, and the Instrument Cluster. Tire Pressure
Monitoring System information is received by the
EVIC in the form of radio transmissions. The tire
pressure sensors are mounted to the vehicle wheels.
For complete information, refer to the Tire Pressure
Monitoring System section in this publication.

3.14.1

VEHICLE INFORMATION DISPLAY

The CMTC/EVIC provides the following func-

tions:

•

Compass direction

•

Outside temperature

•

Elapsed ignition on time

•

Distance to empty

•

Average fuel economy

•

Instantaneous fuel economy

•

Trip odometer

•

Distance to service

The EVIC will also display the following driver

alert messages:

•

TURN SIGNAL ON (with vehicle graphic)

•

PERFORM SERVICE

•

DOOR OPEN (individual or multiple doors, with
graphic)

•

LOW or HIGH TIRE(S) PRESSURE (when
equipped)

•

ADJUSTABLE PEDAL DISABLED CRUISE
ENGAGED (when equipped)

•

ADJUSTABLE PEDAL DISABLED VEHICLE
IN REVERSE (when equipped)

An audible chime or chimes will accompany any

displayed warning messages. Chime requests with
an OPEN message are dependent upon vehicle
speed.

The CT/CMTC/EVIC will not display information

for any of the screens for which it did not receive the
proper PCI bus data. Refer to the symptom list in
the Overhead Console section for problems related
to the CT/CMTC/EVIC.

The CMTC/EVIC receives the following messages

from the Body Control Module (BCM):

•

Verification of US/Metric status

•

VF display dimming brightness and exterior
lamp status

•

Elapsed Ignition On Time data

•

Fuel Economy (Average and Instantaneous)

•

Distance to Empty

•

Distance to service

•

Driver warning messages

The CT/CMTC/EVIC receives the following mes-

sages from the Front Control Module (FCM):

•

Outside Temperature

The CMTC/EVIC receives the following messages

from the Powertrain Control Module (PCM):

•

Trip Odometer data

•

Vehicle Speed

The EVIC receives the following messages from

the Adjustable Pedal System Module (APS):

•

APS status warnings

The CMTC/EVIC transmits the following mes-

sages to the BCM:

•

Status Request: Beep, Reset, US/M Toggle

•

Current Display

STEP BUTTON

The STEP Button can be used in one of the

following three ways:

1. To sequentially select one of seven displays or

blank display in the following order:

•

Average Fuel Economy

27

GENERAL INFORMATION

•

Distance to Empty

•

Instantaneous Fuel Economy

•

Trip Odometer

•

Time Elapsed

•

Distance to Service Message

•

Off (Blank)

2. To set the magnetic variance zone when VARI-

ANCE = X (X = 1 - 15) is indicated in the VF
Display.

3. To select the displayed programmable feature

setting. (When equipped.)

MENU BUTTON (EVIC only)

For complete information of the programmable

features and memory messages, refer to the RS/RG
Service Manual.

Use the MENU button to sequentially step the

EVIC through the programmable features.

Use the MENU button to enter the Tire Pressure

Monitoring (TPM) Training Procedure.

RESET BUTTON

The RESET Button has two different functions:

1. To clear the trip functions that may be reset

2. To enter and exit the diagnostic mode

Pressing the RESET button once will clear the

trip function that is currently being displayed (ex-
cept Distance to Service) and the CMTC/EVIC will
send a PCI bus beep request to the BCM. If the
RESET button is pressed again within 3 seconds,
the CMTC/EVIC will reset ALL of the trip functions
and an additional beep request is sent to the BCM.
The trip functions that may be reset are:

•

Average Fuel Economy

•

Trip Odometer

•

Elapsed Time

A reset will only occur if one of the trip functions

that may be reset is currently being displayed.
Pressing the RESET button for more than three (3)
seconds resets the Distance to Service function
while the Distance to Service message is being
displayed. The CMTC/EVIC module will send a
beep request to the BCM.

Simultaneously pressing the RESET button and

the STEP button while turning the ignition from
Off to On will enter the CMTC/EVIC into the
self-diagnostic mode.

COMPASS/TEMPERATURE (C/T) BUTTON

Actuating

the

Compass/Temperature

Button

(C/T) will cause the CMTC/EVIC to display the
compass and temperature information. This func-
tion will operate from another traveler display or
from the programmable feature mode.

3.14.2

TRAVELER DISPLAY FUNCTIONS

Using the STEP button will change the CMTC/

EVIC between modes of operation and display the
appropriate information according to data received
from the PCI Bus.

COMPASS/TEMPERATURE

The CMTC/EVIC simultaneously displays the

compass reading and the outside temperature. Out-
side temperature information is received via the
PCI bus from the FCM.

The CMTC/EVIC module internally senses and

calculates the compass direction.

COMPASS OPERATION - ALL

Upon ignition on, if the calibration information

stored in the CMTC memory is within the normal
range, the CMTC will perform in slow Auto-Cal
mode. In slow Auto-Cal mode, the CMTC continu-
ously compensates for the slowly changing mag-
netic field of the vehicle. The compass module
detects changes in the vehicle magnetism and
makes appropriate internal corrections to ensure
proper displayed direction.

However, if the calibration information stored in

the CMTC memory is not within the normal range
at ignition on, the CMTC will enter fast Auto-Cal.
CAL is displayed along with the temperature.

Auto activation of the fast Auto-Cal mode will

also occur when the CMTC is subjected to high
magnetic field strength levels, which cause all com-
pass readings to be erroneous for a continuous
period of five (5) minutes. During fast Auto-Cal,
CAL will be displayed along with the temperature.

Fast Auto-Cal can also be performed manually, by

pressing and holding the RESET button for 10
seconds during the Compass/Temperature display
mode.

3.14.3

SETTING MAGNETIC ZONE
VARIANCE

Variance is the difference between magnetic

North and geographic North. For proper compass
function, the correct variance zone must be set.
Refer to the Zone Variance map for the correct zone.
Follow these steps to check or change the variance
zone:

CMTC/EVIC:

•

The ignition switch must be in the On position
and the CMTC/EVIC display must not be blank.

•

If the compass/temperature data is not currently
being displayed, momentarily press and release
the C/T button to display compass/temp informa-
tion.

•

Press and hold the RESET button (approximately
5 seconds) until VARIANCE = XX is displayed.

28

GENERAL INFORMATION

The CMTC/EVIC will display the variance zone
stored in memory and the word VARIANCE.

•

Use the RESET button to select the proper vari-
ance zone number, 1 through 15.

•

After selecting the proper zone number, momen-
tarily press and release the RESET button. The
variance zone is then stored in the memory and
the CMTC/EVIC returns to normal operation.

CT:

•

The ignition switch must be in the On position
and the C/T display must not be blank.

•

Press and hold the C/T and US/M buttons (ap-
proximately 5 seconds) until VARIANCE = XX is
displayed. The C/T will display the variance zone
stored in memory and the word VARIANCE.

•

Use the US/M button to select the proper vari-
ance zone number, 1 through 15.

•

After selecting the proper zone number, momen-
tarily press and release the C/T button. The
variance zone is then stored in the memory and
the C/T returns to normal operation..

3.14.4

COMPASS CALIBRATION

The compass module has 2 types of auto-

calibration; slow-cal and fast-cal. Slow-cal ensures
that during normal vehicle operation the compass
performs auto-calibration functions to keep the
compass sensors in their proper operating range.
Whenever the ignition is On and the CT/CMTC/
EVIC receives PCI bus data indicating that engine
RPM is greater than zero, auto-calibration is per-
formed continuously.

If the calibration information stored in the com-

pass module memory is not within the normal
range after a power-up cycle, the compass will
display CAL. The CT/CMTC/EVIC will enter into
the fast-cal mode until calibration is complete.

To enter the compass into Manual Calibration

mode, perform the following steps:

•

Drive the vehicle to an area away from any large
metal objects or overhead power lines.

•

Ensure that the proper variance zone is selected.
See

9Setting Magnetic Zone Variance.9

•

The ignition switch must be in the On position
and the CMTC/EVIC display must not be blank.

•

Press the C/T button to view the Compass/
Temperature display.

•

Press and hold the RESET button (approximately
10 seconds) until CAL is displayed, then release
the button.

•

Drive slowly, less than 5 MPH (8KPH) in at least
1 complete 360-degree circle.

•

CAL will remain illuminated to alert the driver
that the compass is in the calibration mode.

•

After calibration is complete, CAL will turn off.

NOTE: For C/T Manual Calibration, perform
the same procedure as above, but press and
hold the C/T and US/M buttons until CAL is
displayed.

If the compass appears blank, unable to be cali-

brated, or the compass displays false indications,
the vehicle must be demagnetized. Refer to Com-
pass Demagnetizing Procedure in the Service Man-
ual.

3.14.5

SELF-CHECK DIAGNOSTICS

The CT/CMTC/EVIC is capable of performing a

diagnostic self check on its internal functions. Di-
agnostics may be performed using a DRBIII

t or by

using the following procedure:

1. For CMTC/EVIC: With the ignition switch in the

OFF position, depress and hold the RESET and
the STEP buttons.
For CT: With the ignition switch in the OFF
position, depress and hold the C/T and the US/M
buttons.

2. Turn the ignition switch to the ON position.

3. Continue to hold both buttons until the software

versions are displayed, then release the buttons.

4. All of the VFD segments will illuminate for 2-4

seconds. Check for segments that do not illumi-
nate or illuminate all the time.

5. When the self-check is complete the EVIC will

display one of the following messages:

•

PASS SELF TEST

•

FAILED SELF TEST

•

NOT RECEIVING J1850 MESSAGE
When the self-check is complete the CT/CMTC
will display one of the following messages:

•

PASS

•

FAIL

•

BUS

1. To exit the self-check mode:

29

GENERAL INFORMATION

For the CMTC/EVIC: Depress the STEP or RE-

SET button, or cycle the ignition switch and the
CMTC/EVIC will return to normal operation.

For the C/T: Depress the C/T or US/M button, or

cycle the ignition switch and the CT will return to
normal operation.

If a Communication fault is displayed, refer to the

symptom list. If a FAIL or FAILED is displayed, the
CT/CMTC/EVIC must be replaced.

3.14.6

AMBIENT TEMPERATURE SENSOR

The ambient air temperature is monitored by the

FCM and displayed by the CT/CMTC/EVIC. The
FCM receives a hardwire input from the ambient
temperature sensor (ATS).

The ATS is a variable resistor that operates on a

5-volt reference signal circuit hardwired from the
FCM. The resistance in the ATS changes as the
outside temperature rises or falls. The FCM senses
the change in reference voltage through the ATS
resistor. Based on the resistance of the ATS, the
FCM is programmed to correspond to a specific
temperature. The FCM stores and filters the ambi-
ent temperature data and transmits this data to the
CMTC/EVIC via the PCI Bus. The ATS cannot be
adjusted or repaired and, if faulty or damaged, it
must be replaced.

3.14.7

AMBIENT TEMPERATURE SENSOR
FAULT CODES

The outside temperature function is supported by

the ambient temperature sensor (ATS), a signal and
ground circuit hardwired to the FCM, and the
CMTC/EVIC display.

If the CMTC/EVIC display indicates 54°C (130°F)

or the ATS sense circuit is shorted to ground, the
temp display will be 54°C (130°F) to indicate a
SHORT circuit condition.

If the CMTC/EVIC display indicates -40°C

(-40°F) or the ATS sense circuit is open, the temp
display will be -40°C (-40°F) to indicate an OPEN
circuit condition.

If there is an OPEN or SHORT circuit condition,

it must be repaired before the CMTC/EVIC VFD
can be tested.

The ATS is supported by the FCM. Ambient

Temperature Sensor DTCs will be recorded in the
FCM. The ATS can be diagnosed using the following
Sensor Test. Test the ATS circuits using the diag-
nostics in the Body Diagnostic Procedures Manual.
If the CMTC/EVIC passes the self-test, and the
ATS, the circuits, and PCI bus communications are
confirmed to be OK, but the CMTC/EVIC tempera-
ture display is inoperative or incorrect, replace the
FCM.

AMBIENT TEMPERATURE SENSOR TEST

1. Turn the ignition OFF.

2. Disconnect the ATS harness connector.

3. Measure the resistance of the ATS using the

following min/max values:

•

0° C (32° F) Sensor Resistance = 29.33 - 35.99
Kilohms

•

10° C (50° F) Sensor Resistance = 17.99 - 21.81
Kilohms

•

20° C (68° F) Sensor Resistance = 11.37 - 13.61
Kilohms

•

25° C (77° F) Sensor Resistance = 9.12 - 10.86
Kilohms

•

30° C (86° F) Sensor Resistance = 7.37 - 8.75
Kilohms

•

40° C (104° F) Sensor Resistance = 4.90 - 5.75
Kilohms

The sensor resistance should read between these

min/max values. If the resistance values are not
OK, replace the Sensor.

3.14.8

HOMELINK

T UNIVERSAL

TRANSMITTER

If equipped, the HomeLink

t Universal Transmit-

ter is integrated into the overhead console. For
added security it will operate home security sys-
tems that use coded signals known generically as
Rolling Codes. The overhead console display pro-
vides visual feedback to the driver, indicating which
HomeLink

t transmitter channel button is being

pressed. The HomeLink

t can learn and store up to

three separate transmitter radio frequency codes to
operate garage door openers, security gates, and
security lighting. The HomeLink

t buttons are

marked with one, two, or three dots. For complete
information, refer to Universal Transmitter in the
Service Manual or the Owner’s Manual.

3.14.9

TIRE PRESSURE MONITORING
SYSTEM (TPM)

If equipped with the Tire Pressure Monitoring

System (TPM), each of the vehicles four wheels will
have a valve stem with a pressure sensor and radio
transmitter built in. Signals from the tire pressure
Sensor/Transmitters are received and interpreted
by the Electronic Vehicle Information Center
(EVIC).

A Sensor/Transmitter in a mounted wheel will

broadcast its detected pressure once per minute
when the vehicle is moving faster than 32 km/h (20
mph). Each Sensor/Transmitter’s broadcast is
uniquely coded so that the EVIC can determine the
location.

30

GENERAL INFORMATION