Chrysler Voyager. Manual — part 152

mirrors and front wiper de-icer grid. In addition the
front wiper de-ice function is turned on when front
defog/defrost mode is selected.

When the defroster button is pushed, the HVAC

control sends a bus message over the PCI bus to the
Front Control Module (FCM) which controls the
Rear Window Defogger relay. The defroster LED
will illuminate when the defroster function is on.
The defroster will function for 10 minutes or can be
cycled off sooner by pressing the defroster button
again. The front wiper de-icer grid receives its 12
volts from the accessory relay through fuse 11 and
the HVAC control module supplies the grid ground.

3.20

VEHICLE THEFT SECURITY SYSTEM

The Vehicle Theft Security System (VTSS) is part

of the Body Control Module (BCM). The BCM
monitors the vehicle doors, liftgate (export only),
hood (export only), and the ignition for unautho-
rized operation. The alarm activates by sounding
the horn, flashing the headlamps and the VTSS
indicator lamp. The VTSS does not prevent engine
operation, this is done with the Sentry Key Immo-
bilizer Module (SKIM). The VTSS indicator lamp
will flash for approximately 15 seconds during the
arming process. If there is no interruption during
the arming process, upon completion the VTSS
indicator lamp will flash at a slower rate. When the
BCM receives an input to trigger the alarm, the
BCM will control the outputs of the headlamps,
horn, and VTSS lamp for approximately 15 min-
utes.
Arming (Active and Passive)

Active arming occurs when the ignition key is

removed, the RKE transmitter or door key cylinders
are used to lock the vehicle doors, whether the doors
are open or closed. The arming process is complete
only after all doors are closed.

Passive arming occurs when the ignition key is

removed, the driver door is opened, and the doors
are locked with the power door lock switch, and the
door is closed.
Disarming (Active and Passive)

Active disarming occurs when the RKE transmit-

ter is used to unlock the vehicle doors. This disarm-
ing will also halt the alarm once it has been acti-
vated.

Passive disarming occurs upon normal vehicle

entry (unlocking driver door with the key) or turn-
ing the ignition switch on with a valid skim key.
This disarming will also halt the alarm once it has
been activated.
Tamper Alert

The VTSS tamper alert will sound the horn three

times upon disarming after an initial alarming has
occurred to indicate a tamper condition has oc-
curred.

Manual Override

The system will not arm if the doors are locked

using the manual lock control or if the locks are
actuated by an inside occupant after the doors are
closed.
Diagnosis

For complaints about the Vehicle Theft Alarm

triggering on its own, use the DRBIII

t and read the

Last VTSS Cause status.

3.20.1

THATCHAM ALARM SYSTEM
(EXPORT ONLY)

The Thatcham Alarm Module monitors the vehi-

cle doors, liftgate, hood and the interior of the
vehicle for unauthorized operation. The vehicle
doors, liftgate, and hood use ajar switches as inputs
to the BCM to indicate their current status. The
interior of the vehicle is secured by the use of
Intrusion Sensors. The Intrusion Sensors are used
as inputs to the RKE/Thatcham Alarm Module to
report any motion in the interior of the vehicle. The
alarm activates by sounding the siren, flashing the
hazard lamps, and the VTSS Indicator Lamp.

Arming
Before arming, all doors, liftgate, and the hood

must be completely closed. The system can only be
armed by locking the doors with the RKE transmit-
ter.

Disarming
To disarm the alarm system, use the RKE trans-

mitter or turn the ignition on with a valid SKIM
key. This will also halt the alarm once it has been
activated.

NOTE: A powertrain control module from a
vehicle equipped with a vehicle theft security
system cannot be used in a vehicle that is not
equipped

with

a

vehicle

theft

security

system. If the VTSS indicator lamp comes on
after ignition on and stays on, the PCI Bus
Communication with the powertrain control
module has possibly been lost.

3.21

WIPER SYSTEM

3.21.1

FRONT WIPER

The front wiper/washer system consists of the

following features: lo-hi-speed, mist wipers, inter-
mittent wipers and wipe after wash. The front
wiper system is only active when the ignition switch
is in the RUN/ACC position. The vehicle operator
selects the front wiper function using the front
wiper switch (a resistive multiplexed stalk switch)
which is integral to the Multi-Function Switch. The
front wiper switch is hardwired to the Body Control

35

GENERAL INFORMATION

Module (BCM). Upon receiving a wiper switch sig-
nal, the BCM sends a PCI Bus message to the Front
Control Module (FCM). The FCM controls the ON/
OFF relay, the HIGH/LOW relay and the front and
rear washer pump motors.

The Wiper system utilizes the BCM to control the

on/off and hi/low relays for the low and hi speed
wiper functions, intermittent wiper delay as the
switch position changes, pulse wipe, wipe after
wash mode and wiper motor functions. The BCM
uses the vehicle speed input to double the usual
delay time below 10 MPH (6 KPH).

3.21.2

SPEED SENSITIVE INTERMITTENT
WIPE MODE

There are 5 individual delay time settings with a

minimum delay of 1.7 seconds to a maximum of 18.4
seconds. When the vehicle speed is under 10 MPH
(6 KPM), the delay time is doubled, providing a
delay range of 3.4 seconds to 36.8 seconds.

3.21.3

PULSE WIPE

When the wiper is in the off position and the

driver presses the wash button for more than .062
seconds, but less than .5 seconds, 2 wipe cycles in
low speed mode will be provided.

3.21.4

PARK AFTER IGNITION OFF

Because the wiper relays are powered from the

battery, the BCM can run the wipers to park after
the ignition is turned off.

3.21.5

WIPE AFTER WASH

When the driver presses the wash button for over

.5 seconds and releases it, the wiper will continue to
run for 2 additional wipe cycles.

3.21.6

REAR WIPER

The rear wiper/washer system consists of the

following features: mist wipers, intermittent wipers
and wipe after wash. The rear wiper system is only
active when the ignition switch is in the RUN/ACC
position. The vehicle operator selects the rear wiper
function using one of the three buttons on the dash
mounted rear wiper switch. The rear wiper switch
is hardwired to the Body Control Module (BCM).
Upon receiving a wiper switch signal, the BCM
provides 12 volts to the rear wiper motor. Rear
washer occurs when the BCM receives a rear
washer switch ON input. The BCM sends a PCI Bus
message to the FCM requesting rear washer on.
The FCM activates the rear washer by providing a
ground for the rear washer motor.

3.21.7

SPEED SENSITIVE INTERMITTENT
WIPE MODE

The delay setting of the rear wiper system is

based solely on the vehicle speed. The delay time is
defined as the amount of time from the start of a
wipe to the beginning of the next wipe. The rear
wiper system delay time is based on the following:

7.75 - (MPH x .05) = Seconds delay

Examples:

At zero (0) MPH the delay is 7.75 seconds.
At 100 MPH the delay is 2.75 seconds.

3.21.8

WIPE AFTER WASH

When the driver presses the wash button for over

1.5 seconds and releases it, the wiper will continue
to run for 2 additional wipe cycles.

3.22

USING THE DRBIII

T

Refer to the DRBIII

t user guide for manuals

and assistance with reading trouble codes, erasing
trouble codes, and other DRBIII

t functions.

3.23

DRBIII

T ERROR MESSAGES

Under normal operation, the DRBIII

t will dis-

play one of only two error messages: user-requested
WARM Boot or User-Requested COLD Boot. If the
DRBIII

t should display any other error message,

record the entire display and call the STAR Center.
This is a sample of such an error message display:

ver:2.14
date: 26 Jul93
file: key_iff.cc
date: Jul26 1993
line: 548
err: 0xi
User-Requested COLD Boot

Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.

3.24

DRBIII

T DOES NOT POWER UP

(BLANK SCREEN)

If the LED’s do not light or no sound is emitted at

start up, check for loose cable connections or a bad
cable. Check the vehicle battery voltage (data link
connector cavity 16). A minimum of 11 volts is
required to adequately power the DRBIII

t. Check

for proper grounds at DLC cavities 4 and 5.

If all connections are proper between the

DRBIII

t and the vehicle or other devices, and the

vehicle battery is fully charged, an inoperative
DRBIII

t may be the result or a faulty cable or

vehicle wiring.

36

GENERAL INFORMATION

3.25

DISPLAY IS NOT VISIBLE

Low temperatures will affect the visibility of the

display. Adjust the contrast to compensate for this
condition.

4.0

DISCLAIMERS, SAFETY,
WARNINGS

4.1

DISCLAIMERS

All information, illustrations, and specifications

contained in this manual are based on the latest
information available at the time of publication.
The right is reserved to make changes at any time
without notice.

4.2

SAFETY

4.2.1

TECHNICIAN SAFETY INFORMATION

WARNING: ENGINES PRODUCE CARBON
MONOXIDE THAT IS ODORLESS, CAUSES
SLOWER REACTION TIME, AND CAN LEAD
TO SERIOUS INJURY. WHEN THE ENGINE IS
OPERATING, KEEP SERVICE AREAS WELL
VENTILATED OR ATTACH THE VEHICLE
EXHAUST SYSTEM TO THE SHOP EXHAUST
REMOVAL SYSTEM.

Set the parking brake and block the wheel before

testing or repairing the vehicle. It is especially
important to block the wheels on front-wheel drive
vehicles; the parking brake does not hold drive
wheels.

When servicing a vehicle, always wear eye pro-

tection, and remove any metal jewelry such as

rings, watchbands or bracelets that might make an
inadvertent electrical contact.

When diagnosing a body system problem, it is

important to follow approved procedures where
applicable. These procedures can be found in this
General Information Section or in the service man-
ual procedures. Following these procedures is very
important to safety of individuals performing diag-
nostic tests.

4.2.2

VEHICLE PREPARATION FOR
TESTING

Make sure the vehicle being tested has a fully

charged battery. If it does not, false diagnostic codes
or error messages may occur.

4.2.3

SERVICING SUB-ASSEMBLIES

Some components of the body system are in-

tended to be serviced as an assembly only. Attempt-
ing to remove or repair certain system sub-
components may result in personal injury and/or
improper system operation. Only those components
with approved repair and installation procedures in
the service manual should be serviced.

4.2.4

DRBIII

T SAFETY INFORMATION

WARNING: EXCEEDING THE LIMITS OF THE
DRBIII

T

MULTIMETER IS DANGEROUS. IT

CAN

EXPOSE

YOU

TO

SERIOUS

OR

POSSIBLY

FATAL

INJURY.

CAREFULLY

READ AND UNDERSTAND THE CAUTIONS
AND THE SPECIFICATION LIMITS.

•

Follow the vehicle manufacturer’s service speci-
fications at all times.

•

Do not use the DRBIII

t if it has been damaged.

•

Do not use the test leads if the insulation is
damaged or if metal is exposed.

•

To avoid electrical shock, do not touch the test
leads, tips, or the circuit being tested.

•

Choose the proper range and functions for the
measurement. Do not try voltage or current mea-
surement that may exceed the rated capacity.

•

Do not exceed the limits shown in the table below:

FUNCTION

INPUT LIMIT

Volts

0 - 500 peak volts AC
0 - 500 volts DC

Ohms (resistance)*

0 -1.12 megohms

Frequency Measured
Frequency Generated

0 - 10 kHz

37

GENERAL INFORMATION

FUNCTION

INPUT LIMIT

Temperature

-58 - 1100°F
-50 - 600°C

* Ohms cannot be measured if voltage is present.

Ohms can be measured only in a non-powered
circuit.

•

Voltage between any terminal and ground must
not exceed 500v DC or 500v peak AC.

•

Use caution when measuring voltage above 25v
DC or 25v AC.

•

Use the low current shunt to measure circuits up
to 10A. Use the high current clamp to measure
circuits exceeding 10A.

•

When testing for the presence of voltage or cur-
rent, make sure the meter is functioning cor-
rectly. Take a reading of a known voltage or
current before accepting a zero reading.

•

When measuring current, connect the meter in
series with the load.

•

Disconnect the live test lead before disconnecting
the common test lead.

•

When using the meter function, keep the
DRBIII

t away from spark plug or coil wires to

avoid measuring error from outside interference.

4.3

WARNINGS

4.3.1

VEHICLE DAMAGE WARNINGS

Before disconnecting any control module, make

sure the ignition is “off”. Failure to do so could
damage the module.

When testing voltage or continuity at any control

module, use the terminal side (not the wire end) of
the connector. Do not probe a wire through the
insulation; this will damage it and eventually cause
it to fail because of corrosion. Be careful when
performing electrical tests so as to prevent acciden-
tal shorting of terminals. Such mistakes can dam-
age fuses or components. Also, a second code could
be set, making diagnosis of the original problem
more difficult.

4.3.2

ROAD TESTING A COMPLAINT
VEHICLE

Some complaints will require a test drive as part

of the repair verification procedure. The purpose of
the test drive is to try to duplicate the diagnostic
code or symptom condition.

WARNING:

BEFORE

ROAD

TESTING

A

VEHICLE,

BE

SURE

THAT

ALL

COMPONENTS

ARE

REASSEMBLED.

DURING THE TEST DRIVE, DO NOT TRY TO
READ

THE

DRBIII

T

SCREEN

WHILE

IN

MOTION. DO NOT HANG THE DRBIII

T

FROM

THE REAR VIEW MIRROR OR OPERATE IT
YOURSELF.

HAVE

AN

ASSISTANT

AVAILABLE TO OPERATE THE DRBIII

T

.

5.0

REQUIRED TOOLS AND
EQUIPMENT

DRBIII

t (diagnostic read-out box)

Jumper wires
Ohmmeter
Voltmeter
Sentry Key Tester
Test Light
8310 Airbag System Load Tool
8443 SRS Airbag System Load Tool

6.0

GLOSSARY OF TERMS

ABS

antilock brake system

ACM

airbag control module

ACT

actuator

AECM

airbag electronic control module
(ACM)

APM

adjustable pedals module

ASDM

airbag system diagnostic module
(ACM)

ATC

automatic temperature control

BCM

body control module

CAB

controller antilock brake

CMTC

compass/mini-trip computer

CPA

connector positive assurance

DAB

driver airbag

DCHA

diesel cabin heater assist (cabin
heater)

DLC

data link connector

DTC

diagnostic trouble code

DR

driver

EBL

electric back lite (rear window de-
fogger)

ECM

engine control module

EVIC

electronic vehicle information center

FCM

front control module

GCC

Gulf Coast Countries

38

GENERAL INFORMATION