Chrysler RG Voyager. Manual - part 11

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.

3.5.3

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.

3.5.4

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.

3.6

COMMUNICATION

The Programmable Communication Interface or

PCI Bus is a single wire multiplexed network capa-
ble of supporting binary encoded messages shared
between multiple modules. The PCI bus circuit is
identified as D25 and is white with a violet tracer.
Additional tracer colors may be added to the violet
in order to distinguish between different module
connections. The modules are wired in parallel.
Connections are made in the harness using splices.
The following modules are used on the RS/RG:

•

Body Control Module

•

Front Control Module

•

Occupant Restraint Controller

•

Occupant Classification Module

•

Controller Antilock Brake (MK20E)

•

Antilock Brake Module (MK25E)

•

Powertrain Control Module (Gas)

•

Transmission Control Module (Diesel Auto Only)

•

Engine Control Module (Diesel)

•

Radio

•

Amplifier

•

CD Changer

•

DVD/CD Changer

•

Hands Free Module

•

Automatic Temperature Control Module

•

A/C Heater Control Module (MTC)

•

Sentry Key Remote Entry Module (SKREEM)

•

Memory Seat/Mirror/Adjustable Pedals Module
(MSMAPM)

•

Overhead Console

•

Mechanical Instrument Cluster

•

Left Sliding Door Control Module

•

Right Sliding Door Control Module

•

Thatcham Alarm Module (Export)

•

Power Liftgate Module

•

Park Assist Module

GENERAL INFORMATION

Each module provides its own bias and termina-

tion in order to transmit and receive messages. The
bus voltage is at zero volts when no modules are
transmitting and is pulled up to about seven and a
half volts when modules are transmitting.

The bus messages are transmitted at a rate

averaging 10800 bits per second. Since there is only
voltage present when the modules transmit and the
message length is only about 500 milliseconds, it is
ineffective to try and measure the bus activity with
a conventional voltmeter. The preferred method is
to use the DRBIII

t lab scope. The 12v square wave

selection on the 20-volt scale provides a good view of
the bus activity. Voltage on the bus should pulse
between zero and about seven and a half volts.
Refer to the following figure for some typical dis-
plays.

The PCI Bus failure modes are broken down into

two categories. Complete PCI Bus Communication
Failure and individual module no response. Causes
of a complete PCI Bus Communication Failure
include a short to ground or battery on the PCI
circuit. Individual module no response can be
caused by an open PCI circuit at the module, or an
open battery or ground circuit to the affected mod-
ule.

Symptoms of a complete PCI Bus Communication

Failure would include but are not limited to:

•

All gauges on the MIC stay at zero

•

All telltales on MIC illuminate

•

MIC backlighting at full intensity

•

Dashed lines in the overhead console ambient
temperature display

•

No response received from any module on the PCI
bus (except the PCM/ECM)

•

No start (if equipped with Sentry Key Immobi-
lizer)

Symptoms of Individual module failure could

include any one or more of the above. The difference
would be that at least one or more modules would
respond to the DRBIII

Diagnosis starts with symptom identification. If a

complete PCI Bus Communication Failure is sus-

pected, begin by identifying which modules the
vehicle is equipped with and then attempt to get a
response from the modules with the DRBIII

t. If any

modules are responding, the failure is not related to
the total bus, but can be caused by one or more
modules PCI circuit or power supply and ground
circuits. The DRBIII

t may display “BUS +/- SIG-

NAL OPEN” or “NO RESPONSE” to indicate a
communication problem. These same messages will
be displayed if the vehicle is not equipped with that
particular module. The CCD error message is a
default message used by the DRBIII

t and in no way

indicates whether or not the PCI bus is operational.
The message is only an indication that a module is
either not responding or the vehicle is not equipped.

NOTE: For 2005 model year, some vehicles
will

integrate

the

Transmission

Control

Module and Powertrain Control Module into a
single control module. This new module is
the

Next

Generation

Controller

for

DaimlerChrysler and will be referred to as the
Powertrain

Control

Module

(PCM).

The

Transmission Control Module is part of the
Powertrain Control Module.

Diagnostic procedures and DTC numbers are
some of the changes you will see which reflect
the new combined module technology. The
PCM will have four color coded connectors C1
through C4, (C1-BLK, C2-ORANGE, C3-WHITE,
C4-GREEN), each PCM connector will have 38
pins each. Two new tools are used for probing
and repairing the New PCM connectors. A New
tool

release

the

pins

from

the

PCM

connectors Miller #3638 is introduced, you
must use the Miller tool #3638 to release the
connector pins or harness and connector
damage will occur. Also a New tool for probing
connectors Miller #8815 is introduced, you
must use the Miller tool #8815 to probe the PCM
pins or harness and connector damage will
occur. There is also a new Verification test and
module replacment procedure for the PCM.

GENERAL INFORMATION

3.7

DOOR AJAR SYSTEM

The door ajar and liftgate ajar states are used as

inputs for the Body Control Module (BCM). The
BCM uses these inputs to determine exactly what
position the doors and liftgate are in. The DRBIII

will display the state of the door ajar and the
liftgate ajar switches in Inputs/Outputs. It’s impor-
tant to note, that when any door, or the liftgate is
closed, the switch state on the DRBIII

t will show

OPEN. When any door, or the liftgate is open the
switch state on the DRBIII

t will show CLOSED.

During diagnosis, if a door or the liftgate is closed
and the DRBIII

t displays the switch state as

CLOSED, it indicates a shorted ajar circuit. If the
door or the liftgate is open and the DRBIII

t dis-

plays the switch state as OPEN, it indicates an
open ajar circuit.

3.8

EXTERIOR LIGHTING SYSTEM

3.8.1

HEADLAMP POWER

The Headlamp Switch is a direct input to the

BCM. The BCM sends a BUS message to the FCM
informing it of a headlamp switch status change.
The FCM then turns on power to the headlamps
through four “fuseless” circuits. These circuits are
electronically controlled and continuously moni-
tored for malfunctions. Power is supplied to each
filament in a separate circuit. For vehicles equipped
with daytime running Lamps (DRL), the FCM elec-
tronically steps down the headlamp voltage to pro-
vide the desired illumination.

3.8.2

HEADLAMP SWITCH

The Headlamp Switch uses a multiplexed (MUX)

circuit to the Body Control Module (BCM). The
Headlamp Switch controls the Fog lamp relay, Park
lamps and the Low and High headlamps. The BCM
then sends a signal through the PCI Bus line to the
FCM as to what state the switch has selected. The
FCM energizes the high side output drivers to turn
ON the desired lamps.

3.8.3

PARK LAMP RELAY

The Park Lamp Switch is a direct input to the

BCM. The BCM sends a BUS message to the FCM
informing it to turn on the park lamp relay. The
park lamp relay is then powered through low side
control of the FCM. This circuit is electronically
controlled and continuously monitored for malfunc-
tions.

3.8.4

FOG LAMP RELAY

The Fog Lamp switch is a direct input to the

BCM. The BCM sends a BUS message to the FCM
informing it to turn on the fog lamp relay. The fog
lamp relay is then powered through low side control
of the FCM. This circuit is electronically controlled
and continuously monitored for malfunctions. Fog
lamp functionality is not equipped on all vehicles.
The FCM “learns” that the vehicle is equipped with
fog lamps by reading the BCM BUS message.

3.8.5

FOG LAMPS

The BCM controls the operation of the fog lamp

relay that turns the fog lamps ON and OFF. The
Fog lamps can only be ON when the park and low
beams are ON. If the high beams are switched ON
then the Fog lamps will be automatically turned
OFF.

GENERAL INFORMATION

3.8.6

EXTERIOR LIGHTING BATTERY
SAVER

The BCM monitors the status of, and controls, the

Park Lamps, Headlamps and Fog Lamp relays. If
any exterior lamps are left ON after the ignition is
turned OFF, the BCM will turn them OFF after 3
minutes.

3.8.7

AUTO HEADLAMPS

This feature is available on vehicles equipped with

both the Electrocromatic Mirror (ECM) and the
Compass/Mini-Trip Computer (CMTC). When the
BCM detects a day/night signal from the CMTC, an
ECM is present and Auto Headlamp mode is selected.

3.9

FRONT CONTROL MODULE

The Front Control Module (FCM) is an electrical

control and interface center located in the engine
compartment. When it is mated to the Power Dis-
tribution Center (PDC), it is referred to as the
Integrated Power Module (IPM). The IPM, with its
fuses and relays provides power and signal distri-
bution throughout most of the vehicle. The FCM
receives both hard wire and digital electronic inputs
from the vehicle electrical system through the PDC.
Based on these inputs and the ignition switch
position, it provides direct power feeds and relay
control to some of the vehicles’ most critical electri-
cal systems.

The Front Control Module provides the following

features:

Controlled power feeds:

•

Front airbag system

•

Headlamp power

•

EATX module power (4 speed only)

•

Front washer motor

•

Rear washer motor

•

Cabin Heater

•

Brake shift interlock system

Relay controls:

•

Fog lamp relay (when equipped)

•

Park lamp relay

•

Front wiper on relay

•

Front wiper high/low relay

•

Accessory relay

•

Horn relay

•

Front & rear blower relay

•

Name brand speakers (NBS) relay

•

Adjustable pedals relay (non-memory)

•

Electronic back light (EBL) run only relay

Electrical inputs:

•

Headlamp battery supplies 1 & 2

•

Module battery supply

•

Power ground

•

Ignition switch RUN or START position status

•

Ignition switch START only status

•

PCI Bus

•

Stop lamp switch

•

Horn switch

•

Back-up switch

•

Wiper park switch

•

Washer fluid level switch

•

Brake fluid level switch

•

Ambient temperature sensor

•

Right park lamp outage

•

Left park lamp outage

•

Battery IOD

•

Battery (+) connection detection

•

Flash reprogramming voltage

3.9.1

CONTROLLED POWER FEEDS

Front airbag system

The FCM provides power to the Occupant Re-

straint Control (ORC) system through two “fuse-
less” circuits (ORC RUN/START, and ORC RUN
only). These circuits are electronically controlled
and continuously monitored for malfunctions.
Power is supplied while the ignition switch is in the
RUN and START positions on pin 48 of the FCM
connector, and in the RUN only position on pin 29.

Headlamp power

The headlamp switch is a direct input to the

BCM. The BCM sends a PCI Bus message to the
FCM informing it of a headlamp switch status
change. The FCM then turns on power to the
headlamps through four “fuseless” circuits. These
circuits are electronically controlled and continu-
ously monitored for malfunctions. Power is supplied
to each filament in a separate circuit. For vehicles
equipped with Daytime Running Lamps (DRL), the
FCM electronically steps down the headlamp volt-
age to provide the desired illumination.

EATX power

The electronic automatic 4 speed transmission

module is powered when the ignition switch is in
the UNLOCK, RUN or START positions. This cir-
cuit is electronically controlled and continuously
monitored for malfunctions. Power is supplied
through pin 27 of the FCM connector.

Front washer motor

The front washer switch is a direct input to the

BCM. The BCM sends a PCI Bus message to the

GENERAL INFORMATION

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