Chrysler Voyager. Manual — part 145

for the code is corrected. In certain test procedures
within this manual, diagnostic trouble codes are
used as a diagnostic tool.

3.1.9

SPECIAL TOOLS

Some airbag diagnostic test use special tools,

8310 and 8443 airbag load tool, for testing squib
circuits. The load tools contain fixed resistive loads,
jumpers and adapters. The fixed loads are con-
nected to cables and mounted in a storage case. The
cables can be directly connected to some airbag
system connectors. Jumpers are used to convert the
load tool cable connectors to the other airbag sys-
tem connectors. The adapters are connected to the
module harness connector to open shorting clips
and protect the connector terminal during testing.
When using the load tool follow all of the safety
procedures in the service information for discon-
necting airbag system components. Inspect the wir-
ing, connector and terminals for damage or mis-
alignment. Substitute the airbag load tool in place
of a Driver or Passenger Airbag, seat airbag, clock-
spring, or seat belt tensioner (use a jumper if
needed). Then follow all of the safety procedures in
the service information for connecting airbag sys-
tem components. Read the module active DTC’s. If
the module reports NO ACTIVE DTC’s the defective
component has been removed from the system and
should be replaced. If the DTC is still active, con-
tinue this process until all component in the circuit
have been tested. Then disconnect the module con-
nector and connect the matching adapter to the
module connector. With all airbags disconnected
and the adapter installed the squib wiring can be
tested for open and shorted conditions.

3.1.10

ACTIVE CODES

The code becomes active as soon as the malfunc-

tion is detected or key-on, whichever occurs first. An
active trouble code indicates an on-going malfunc-
tion. This means that the defect is currently there
every time the airbag control module checks that
circuit or component. It is impossible to erase an
active code. Active codes automatically erase by
themselves when the reason for the code has been
corrected. With the exception of the warning lamp
trouble codes or malfunctions, when a malfunction
is detected, the airbag lamp remains lit for a mini-
mum of 12 seconds or as long as the malfunction is
present.

3.1.11

STORED CODES

Airbag codes are automatically stored in the

ACM’s memory as soon as the malfunction is de-
tected. The exception is the Loss of Ignition Run
Only code which is an active code only. A stored code
indicates there was an active code present at some

time. However, the code currently may not be
present as an active code, although another code
could be active. When a trouble code occurs, the
airbag warning indicator illuminates for 12 seconds
minimum (even if the problem existed for less than
12 seconds). The code is stored, along with the time
in minutes it was active, and the number of times
the ignition has been cycled since the problem was
last detected. The minimum time shown for any
code will be one minute, even if the code was
actually present for less than one minute. Thus, the
time shown for a code will be one minute, even if the
code was actually present for less than one minute.
Thus, the time shown for a code that was present
for two minutes 13 seconds, for example, would be
three minutes. If a malfunction is detected a diag-
nostic trouble code is stored and will remain stored.
When and if the malfunction ceases to exist, an
ignition cycle count will be initiated for that code. If
the ignition cycle count reaches 100 without a
reoccurrence of the same malfunction, the diagnos-
tic trouble code is erased and that ignition cycle
counter is reset to zero. If the malfunction reoccurs
before the count reaches 100, then the ignition cycle
counter will be reset and diagnostic trouble code
will continue to be a stored code. If a malfunction is
not active while performing a diagnostic test proce-
dure, the active code diagnostic test will not locate
the source of the problem. In this case, the stored
code can indicate an area to inspect. If no obvious
problems are found, erase stored codes, and with
the ignition on wiggle the wire harness and connec-
tors, rotate the steering wheel from stop to stop.
Recheck for codes periodically as you work through
the system. This procedure may uncover a malfunc-
tion that is difficult to locate.

3.2

AUDIO SYSTEM

Some of the radios are on the PCI Bus system.

The PCI Bus inputs into the radio are used for VF
dimming, remote steering wheel controls and cabin
EQ preference. PCI Bus outputs from the radio are
used for the Name Brand Speaker (NBS) relay
activation, as well as cabin EQ preference.

The RBB and RBK radios have the capability of

containing multiple vehicle unique equalization
curves (cabin EQ preferences) within the radio.
These curves will reside in the radio’s flash memory.
The radio is capable of storing up to 20 unique
equalization curves. The latent curves can be se-
lected via the Front Control Module transmitting a
PCI Bus message to the radio in response to a radio
request for equalization message. Upon receipt of a
valid equalization select message response, the ra-
dio will switch to output the corresponding equal-
ization curve.

7

GENERAL INFORMATION

All the radios, except the RAS, are capable of

displaying faults and allowing certain actuation
tests through the use of the DRBIII

t. When at-

tempting to perform PCI Bus diagnostics, the first
step is to identify the radio in use in the vehicle.

When trouble shooting output shorts or “output”

error messages, the following applies:

On radios without an external amplifier, the term

output refers to the path between the radio and the
speaker. This type of circuit can be monitored all
the way through the speaker connections by the
radio assembly. When the radio displays a shorted
output DTC with this type of system, the speaker,
radio, or wiring could be at fault.

On radios with an external amplifier, the term

“output” refers to the circuit between the radio
connector and the amplifier. The radio is capable of
monitoring only this portion and can tell nothing
about the circuit between the amplifier and the
speakers. Consequently, a shorted output DTC on
this type of system would only refer to this circuit.
A faulty speaker could not cause this DTC.

3.2.1

REMOTE RADIO CONTROLS

These radios can be controlled via remote radio

switches (optional). These switches are located on
the back side of the steering wheel. They control
mode, preset, seek up, seek down, volume up and
volume down functions.

These functions are inputs to the Body Control

Module and can be read with the DRBIII

t under

“body computer”. The switches are a multiplexed
signal to the BCM. The radio control MUX circuit is
a 5 volt line that is pulled to ground through
different value resistors built into the switches.
This causes a voltage drop to be seen by the BCM
and it sends a specific message to the radio on the
PCI Bus circuit. The radio then responses to the
message.

This circuit is fairly simple to troubleshoot. The

circuit must be complete from the switches in the
steering wheel to the BCM. The ground must be
complete so that the switches can cause the voltage
drop for the BCM to see. The circuit passes through
the clockspring so continuity through this devise
must be verified.

3.2.2

CD CHANGER

The new in-dash CD Changer is designed to fit

into the existing cubby bin in the center stack. This
new cartridge-less CD Changer is controlled by
your radio, and allows you to individually load up to
four discs at a time. However, due to its compact
design, the CD Changer can only carry out one
operation at a time. For example, you can not load
a new disc while playing another at the same time.
Each operation happens sequentially.

The radio unit installed with your system pro-

vides control over all features of the CD Changer
with the exception of the CD load and eject func-
tions, which are controlled by buttons located on the
front of the CD Changer. The radio also supplies the
power, ground, PCI Bus, left and right speaker
output through a single DIN cable. All features you
would expect, such as Disc Up/Down, Track Up/
Down, Random and Scan are controlled by the
radio, which also displays all relevant CD Changer
information on the radio display.

The CD Changer contains a Load/Eject button

and an indicator light for each of the four disc
positions. The individual light indicates whether a
CD is currently loaded in that particular chamber of
the CD Changer. Pressing the individual Load/Eject
button for a particular chamber will eject a disc
currently present in that chamber. If the chamber is
currently empty, actuating the Load/Eject button
will position that chamber to receive and load a new
disc in that chamber.

3.3

BODY CONTROL MODULE

The body control module (BCM) supplies vehicle

occupants with visual and audible information and
controls various vehicle functions. To provide and
receive information, the module is interfaced to the
vehicle’s serial bus communications network (PCI).
This network consists of the powertrain control
module (PCM), the engine control module (ECM)
diesel, the transmission control module (TCM), the
mechanical instrument cluster (MIC), the front
control module (FCM), the airbag control module
(ACM), the compass/mini-trip (CMTC), the elec-
tronic vehicle information center (EVIC), the con-
troller antilock brake (CAB), the HVAC control
module (ATC & MTC), the power sliding door (Left
& Right) modules (PSD), the power liftgate module
(PLG), the Audio system, the side impact airbag
control (left & right) modules (SIACM), the memory
seat/mirror module (MSMM), the RKE/thatcham
alarm module (export) and the sentry key immobi-
lizer module (SKIM). The BCM is operational when
battery power is supplied to the module.

The body control module provides the following

features:

•

Power Door Locks

•

Automatic Door Lock

•

Door Lock Inhibit

•

Central Locking (with VTSS Only)

•

Battery Protection

•

The BCM will automatically turn off all exterior
lamps after 3 minutes and all interior lamps after
15 minutes after the ignition is turned off, if they
are not turned off by the driver.

8

GENERAL INFORMATION

•

Chime Driver

•

Compass/Minitrip Support

•

Interior Lighting (Courtesy/Reading Lamps)

•

BCM Diagnostic Reporting

•

Electronic Liftgate Release (with Power Door
Locks)

•

Exterior Lighting

•

Headlamp Time Delay (with/without Autohead-
lamps)

•

Automatic Headlamps (with electrochromatic
mirror)

•

Illuminated Entry

•

Fade to Off

This feature dims the interior lighting (courtesy

lamps) gradually if the BCM does not receive any
new inputs that would cause the interior lamps to
remain on.

•

PWM Instrument Panel Dimming

•

Door Lock Inhibit

This feature disables the door lock functions if the

key is in the ignition and either front door is ajar.
Pressing the RKE lock/unlock button under these
conditions, result in normal lock/unlock activation.

•

Power Sliding Door Switch Inputs

The BCM has 4 switch inputs for the power

sliding door feature: Located in the overhead con-
sole are the Left and Right side sliding door
switches to activate either or both sliding doors
under the proper conditions. Also there are B-Pillar
switches located on the Left and Right B-pillar
posts.

•

Power Liftgate Switch Input

The BCM has 1 Liftgate switch input located in

the overhead console

•

Power Lockout Switch Input

The BCM has 1 Lockout switch that when en-

abled will disable the B-Pillar sliding door switches
from activating either sliding door when depressed.
When replacing a body control module there are 2
modules available, a Base and a Midline. The
Midline controller is used on vehicles that have
Power Door Locks. If a vehicle is equipped with the
Vehicle Theft Security System, the midline control-
ler becomes a premium when the theft feature is
enabled.

NOTE: Do not swap the body control module
between vehicles or body control modules
off the shelf.

Engineering does not recommend that service,

dealers or the plant swap Body Control Modules

(BCM) between vehicles or off the shelf. The BCM
has internal diagnostic capability that assists in
diagnosing the system. When an “Open” or a
“Short” circuit exists, the diagnostic tool can be
used to read the BCM codes. The codes are very
descriptive in identifying the appropriate feature
that has faulted. The BCM also learns what fea-
tures are on the vehicle and if modules are swapped
the BCM could set false DTCs based on what it
learned.

3.4

CHIME WARNING SYSTEM

The

BCM

monitors

the

door/liftgate

ajar

switches, multifunction switches, headlight switch,
ignition switch, PCI bus, and the diagnostic tool to
perform various chime operations. The BCM uses a
low-side driver to control the chime located in the
cluster.

The chime system provides the Driver with warn-

ing chimes for:

•

Seat belt

•

Exterior lights on

•

Key-in Ignition

•

Key-in Accessory

•

Engine temperature critical

•

Low washer fluid

•

Turn signals on

•

Dome light on

•

Low oil pressure

•

Any warning lamp announcement

•

High-speed warning Gulf Coast Countries (GCC)
only

The output sound intensity of the chime is ap-

proximately 72 decibels.

3.4.1

CHIME PRIORITY

The following list indicates the priority of the

chime when more than one chime is active at the
same time:

•

Seat belt warning

•

High-speed warning Gulf Coast Countries (GCC)
only

•

Turn signal on

•

Chime request

•

Warning lamp announcement

The cluster is responsible to set priority on all

warning lamp announcement chimes.

9

GENERAL INFORMATION

3.4.2

CHIME ON CONDITIONS

The following is a list of the chime warnings and

when they will sound.

Driver’s Seat

belt Unbuckled:

Sounds for approximately 6

62

seconds when the igntion is turned
on and driver’s seat belt is not
buckled, as a reminder to the
driver to buckle the seat belt.

Exterior Lights

On:

Ignition is in the lock position,
the driver door is ajar, and the
headlight switch is left in any
position, other than auto or off.
The chime will sound as a warn-
ing to the driver until one of the
above conditions is removed or
until the battery protection time
of 3 minutes has expired.

Key-In Ignition: Ignition is in the lock position,

driver door is ajar and the key is
in the ignition. The chime will
sound until one of the above con-
ditions is removed or until the
battery protection time of 15 min-
utes has expired.

Turn Signal On: When the BCM detects a turn

signal input continuously for
1.0mile/0.6km and the vehicle
speed is greater than 15 mph/
24kph, the chime will sound until
the specific turn signal is can-
celled.

Dome Lights On: Ignition is in the lock position,

driver door ajar, and the dome
light switch is left in the on
position. The chime will sound
until one of the above conditions
is removed or until the battery
protection time of 15 minutes has
expired.

Low Oil Pres-

sure:

The chime will sound when the
engine is operating and the oil
pressure drops below 4psi/27.5kPa.

Engine

Temperature

Critical:

The chime will sound when the
engine is operating and the cool-
ant temperature exceeds 252°F/
122C or 234°/112C(diesel). The
chime is continuous at 257°F/
125C and will chime for 4 min-
utes and stop if the temperature
drops below 255°F/123C.

Low Washer

Fluid

The chime will sound when the
washer fluid drops below a spe-
cific level.

Warning Lamp

Announcement:

A chime will sound to alert the
driver to scan the instrument
panel and overhead console to
see which warning lamp is illu-
minated. The door/liftgate ajar
warning lamp will appear with-
out a chime if the vehicle is run-
ning and a door or the liftgate is
opened. A chime will sound if the
door or liftgate is still open and
the vehicle speed is greater than
4mph/6kph.

High-speed

warning Gulf

Coast Countries

(GCC) only

The chime will sound, acting as a
warning to the driver that the
vehicle

speed

has

exceed

75mph

62/120kph63.

3.4.3

WARNING LAMP ANNOUNCEMENT

Low Fuel Lamp: The cluster will request a single

chime after the indicator is illu-
minated.

Volt Lamp: The cluster will request a single

chime after the indicator is illu-
minated.

Oil Pressure

Lamp:

The cluster will request a single
chime after illuminating the in-
dicator above 450rpm vehicle op-
eration.

Liftgate Ajar

Lamp:

The BCM determines when to
chime for liftgate ajar.

Fasten Seat Belt

Lamp:

The MIC will request a single
chime from the BCM when the
ignition is turned to the unlock/
run/start positions if the driver
seat belt is not buckled and 2
seconds after seatbelt warning
chime ends.

Check Engine

Lamp:

The cluster will request a single
chime after the indicator is illu-
minated.

Low Washer
Fluid Lamp:

The cluster will request a single
chime after the indicator is illu-
minated.

Engine Tempera-

ture Lamp:

The cluster will request a single
chime when the indicator is first
illuminated at 252°F/122C.

3.4.4

OTHER CHIME ON CONDITIONS

Programming of

an Additional

Key Fob:

A single cluster chime will sound,
which signals that the program
mode has been initiated.

Programming for

Rolling Door

Locks:

When the programming has been
completed, a single tone from the
chime system, will occur.

10

GENERAL INFORMATION