Dodge Ram. Manual — part 5
•
Arm the Vehicle Theft Security System (if
equipped and all conditions are met).
•
Turn off the illuminated entry feature.
•
Activate the door lock motors.
•
Transmit a PCI bus message to the FCM to
perform horn chirp.
When a valid unlock code is received from the
receiver, the instrument cluster will:
•
Disarm the Vehicle Theft Security System (if
equipped and previously set).
•
Activate the illuminated entry and cargo lamp.
•
Activate the driver door unlock motor (if cus-
tomer programmed for driver door only unlock).
•
Transmit a PCI bus message to the FCM for
optical chirp.
3.14
TELECOMMUNICATIONS
3.14.1
HANDS FREE PHONE
OVERVIEW
The vehicle telecommunications system consists
of a Hands Free Module, Rear view Mirror, and a
Blue-tooth Hands Free Profile enabled cell phone.
The system allows vehicle occupants to use voice
recognition technology to make, receive and screen
phone calls without physically handling a cell
phone. The system has a programmable phone book
that can prevent the vehicle operator from becom-
ing distracted searching for a specific number.
Seven different wireless phones can be pro-
grammed to operate each individual system. Each
of the seven phones is given a rank of priority when
programmed.
OPERATION
Incoming phone messages are transmitted to the
vehicle occupants through the vehicles audio sys-
tem when the ignition is on and the wireless phone
is on. Upon receiving the signal from an incoming
phone call, the vehicle audio system will fade out
the current CD/DVD or radio output. The vehicle
occupants are then directed to accept or reject the
call. Outgoing audio messages are received through
the microphone located in the rearview mirror then
transmitted via hardwire to the Hands Free Module
and finally transmitted through the wireless phone.
Volume of the voice prompts and incoming conver-
sation is controlled using the vehicles’ radio audio
controls and steering wheel controls if equipped.
The rearview mirror contains a Phone Switch, Voice
Recognition Switch and a microphone. The rear
view mirror transmits these inputs via hardwired
circuits to the Hands Free Module.
3.15
VEHICLE THEFT SECURITY SYSTEM
The Instrument Cluster controls the Vehicle
Theft Security System (VTSS). When the VTSS is
armed it will monitor the status of the ignition and
door ajar switches. If the alarm is tripped it will
sound the vehicles horn, flash the exterior lamps
and the VTSS indicator located in the instrument
cluster.
The Instrument Cluster will enable the VTSS
feature once it has received PCI bus messages from
the Sentry Key Immobilizer Module and has also
detected the driver cylinder lock switch being cycled
to the lock/unlock position.
Arming the system is accomplished following a
normal exit sequence of removing the key from the
ignition, opening the door pressing the power lock
button to lock and closing the door, by using a
cylinder lock switch or by pressing the RKE lock
button. After all the doors are closed, the VTSS
indicator will flash quickly for sixteen-seconds in-
dicating the pre-arm process, after which it will
flash at a slower rate indicating the system is
armed. If during the pre-arm process a door is
opened, the ignition is turned to the Run/Start
position or if a RKE unlock button is pressed the
system will exit the pre-arming process.
Disarming can be accomplished with a RKE un-
lock, turning the ignition on with a valid Sentry key
or unlocking the vehicle with a cylinder lock switch.
The Alarming state will last for 18 minutes after
which it will timeout and return to the armed state.
A tamper alert feature will alert the customer to the
alarm being tripped while they were away upon
returning to the vehicle by flashing the VTSS
indicator for 30 seconds after the system has been
disarmed.
All of the switches for the VTSS system can be
monitored using the DRBIII
t. The DRBIIIt is also
useful for a customer complaint of the alarm going
off with no apparent reason by viewing the VTSS
last alarm caused by display.
3.16
WINDSHIELD WIPERS/WASHERS
The Instrument Cluster controls the wiper/
washer system. The instrument cluster receives a
signal from the Multifunction Switch wipe position.
The instrument cluster sends the message to the
Front Control Module (FCM), sending the com-
mand to turn the wiper/washers on. Two relays, the
High/Low relay and the On/Off relay also control
the wipers. Both are located in the PDC or Inte-
grated Power Module.
17
GENERAL INFORMATION
3.17
USING THE DRBIII
T
Refer to the DRBIII
t user’s guide for instructions
and assistance with reading trouble codes, erasing
trouble codes, and other DRBIII
t functions.
3.18
DRBIII
T ERROR MESSAGES AND
BLANK SCREEN
Under normal operation, the DRBIII
t will dis-
play one of only two error messages:
– User-Requested WARM Boot or User Re-
quested 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.
– User-Requested WARM Boot by pressing
MORE and NO at the same time.
ver: 2.29
date: 1 Oct 93
file: key_itf.cc
date: Jan 12 1994
line: 544
err: 0x1
User-Requested WARM Boot
Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.
or User-Requested COLD Boot by pressing
MORE and YES at the same time.
ver: 2.29
date: 1 Oct 99
file: keyhnd1.cc
date: Mar 8 2000
line: 1297
err: 0x1
User-Requested COLD Boot
Press MORE to switch between this display
and the application screen.
Press F4 when done noting information.
3.18.1
DRBIII
T DOES NOT POWER UP
If the LEDs 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 ground connection 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 of faulty cable or vehicle wiring.
3.18.2
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: WHEN OPERATING, ENGINES
PRODUCE AN ODORLESS GAS CALLED
CARBON MONOXIDE. INHALING CARBON
MONOXIDE GAS CAN RESULT IN SLOWER
REACTION
TIMES
AND
CAN
LEAD
TO
PERSONAL INJURY OR DEATH. 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
18
GENERAL INFORMATION
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 the safety of individuals performing
diagnostic 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.
READ ALL DRBIII
T
INSTRUCTIONS BEFORE
USING THE MULTIMETER. FAILURE TO FOL-
LOW THESE INSTRUCTIONS CAN RESULT IN
PERSONAL INJURY OR DEATH.
•
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
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.
19
GENERAL INFORMATION
WARNING:
REASSEMBLE
ALL
COMPO-
NENTS BEFORE ROAD TESTING A VEHICLE.
DO NOT TRY TO READ THE DRBIII
T
SCREEN
OR OTHER TEST EQUIPMENT DURING A
TEST DRIVE. DO NOT HANG THE DRBIII
T
OR
OTHER
TEST
EQUIPMENT
FROM
THE
REARVIEW MIRROR DURING A TEST DRIVE.
HAVE AN ASSISTANT AVAILABLE TO OPER-
ATE
THE
DRBIII
T
OR
OTHER
TEST
EQUIPMENT. FAILURE TO FOLLOW THESE
INSTRUCTIONS CAN RESULT IN PERSONAL
INJURY OR DEATH.
5.0
REQUIRED TOOLS AND
EQUIPMENT
DRBIII
t (diagnostic read-out box)
Jumper wires
Ohmmeter
Voltmeter
Test Light
8310 Airbag System Load Tool
8443 SRS Airbag System Load Tool
8815 Diagnostic Pinout Box
6.0
GLOSSARY OF TERMS
ABS
antilock brake system
ACM
airbag control module
ACT
actuator
AECM
airbag electronic control module
(ACM)
ASDM
airbag system diagnostic module
(ACM)
BCM
body control module
BTSI
brake transmission shift interlock
CAB
controller antilock brake
CMTC
compass/mini-trip computer
CPA
connector positive assurance
DAB
driver airbag
DLC
data link connector
DTC
diagnostic trouble code
EBL
electric back lite (rear window de-
fogger)
ECM
engine control module
EVIC
electronic vehicle information center
FCM
front control module
HFM
hands free module
HVAC
heater ventilation, air conditioning
IC
instrument cluster (mic)
IPM
integrated power module
JB
junction block
MIC
mechanical instrument cluster
NGC
next generation controller
ODO
odometer
ORC
occupant restraint controller
PAB
passenger airbag
PCI
Programmable Communication In-
terface (vehicle communication bus)
PCM
powertrain control module
PDC
power distribution center
PWM
pulse width modulated
RKE
remote keyless entry
RX
receive
SBS
seat belt switch
SBT
seat belt tensioner
SKIM
sentry key immobilizer module
SKIS
sentry key immobilizer system
SRS
supplemental restraint system
SUV
sport utility vehicle
TCCM
transfer case control module
TCM
transmission control module
TX
transmit
UGDO
universal garage door opener
VFD
vacuum fluorescent display
VTSS
vehicle theft security system
20
GENERAL INFORMATION
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