seat memory DODGE RAM 2001 Service Repair Manual

base version of the CTM and the hard wired inputs
or outputs of all CTM versions can be diagnosed
using conventional diagnostic tools and methods;
however, for diagnosis of the high-line or premium
versions of the CTM or the CCD data bus, the use of
a DRBIIItscan tool is required. Refer to the appro-
priate diagnostic information.
OPERATION
The Central Timer Module (CTM) is designed to
control and integrate many of the electronic features
and functions of the vehicle. The base version of the
CTM monitors only hard wired inputs and responds
with the proper hard wired outputs. The microproces-
sor-based high-line/premium version of the CTM
monitors many hard wired switch and sensor inputs
as well as those resources it shares with other elec-
tronic modules in the vehicle through its communica-
tion over the Chrysler Collision Detection (CCD) data
bus network. The internal programming and all of
these inputs allow the high-line/premium CTM
microprocessor to determine the tasks it needs to
perform and their priorities, as well as both the stan-
dard and optional features that it should provide.
The high-line/premium CTM programming then per-
forms those tasks and provides those features
through both CCD data bus communication with
other electronic modules and through hard wired out-
puts to a number of circuits, relays, and actuators.
These outputs allow the high-line/premium CTM the
ability to control numerous accessory systems in the
vehicle.
All versions of the CTM operate on battery current
received through fuses in the Junction Block (JB) on
a non-switched fused B(+) circuit, a fused ignition
switch output (st-run) circuit (base version only), and
a fused ignition switch output (run-acc) circuit (high-
line/premium version only). This arrangement allows
the CTM to provide some features regardless of the
ignition switch position, while other features will
operate only with the ignition switch in the Acces-
sory, On, and/or Start positions. All versions of the
CTM are grounded through their connector and take
out of the instrument panel wire harness. The high-
line/premium CTM has another ground received
through a second connector and take out of the
instrument panel wire harness. The first ground cir-
cuit receives ground through a take out with an eye-
let terminal connector of the instrument panel wire
harness that is secured by a nut to a ground stud
located on the left instrument panel end bracket,
while the second ground circuit (high-line/premium
version only) receives ground through a take out with
an eyelet terminal connector of the instrument panel
wire harness that is secured by a nut to a ground
stud located on the back of the instrument panelarmature above the inboard side of the instrument
panel steering column opening.
The high-line/premium CTM monitors its own
internal circuitry as well as many of its input and
output circuits, and will store a Diagnostic Trouble
Code (DTC) in electronic memory for any failure it
detects. These DTCs can be retrieved and diagnosed
using a DRBIIItscan tool. Refer to the appropriate
diagnostic information.
HARD WIRED INPUTS
The hard wired inputs to the CTM include the fol-
lowing:
²CCD bus± - high-line/premium version only
²CCD bus+ - high-line/premium version only
²Cylinder lock switch mux - high-line premium
version only
²Driver door ajar switch sense
²Fused B(+)
²Fused ignition switch output (run-acc) - high-
line/premium version only
²Fused ignition switch output (st-run) - base ver-
sion only
²Ground (one circuit - base version, two circuits -
high-line/premium version)
²Key-in ignition switch sense
²Passenger door ajar switch sense - high-line/pre-
mium version only
²Power door lock motor B(+) lock - high-line/pre-
mium version only
²Power door lock motor B(+) unlock - high-line/
premium version only
²Radio control mux - high-line/premium version
only
²Tone request signal
²Washer switch sense
²Wiper park switch sense
²Wiper switch mode sense
²Wiper switch mode signal
HARD WIRED OUTPUTS
The hard wired outputs of the CTM include the fol-
lowing:
²CCD bus± - high-line/premium version only
²CCD bus+ - high-line/premium version only
²Courtesy lamp switch output - high-line/pre-
mium version only
²Door lock driver - high-line/premium version
only
²Door unlock driver - high-line/premium version
only
²Headlamp relay control - high-line/premium ver-
sion only
²Heated seat relay control - premium version
only
BR/BEELECTRONIC CONTROL MODULES 8E - 3
BODY CONTROL/CENTRAL TIMER MODULE (Continued)

Deployment of the airbags depends upon the angle
and severity of the impact. The airbag system is
designed to deploy upon a frontal impact within a
thirty degree angle from either side of the vehicle
center line. Deployment is not based upon vehicle
speed; rather, deployment is based upon the rate of
deceleration as measured by the forces of gravity (G
force) upon the airbag system impact sensor, which is
integral to the ACM. When a frontal impact is severe
enough, the microprocessor in the ACM signals the
inflator units of both airbag modules to deploy the
airbags. During a frontal vehicle impact, the knee
blockers work in concert with properly fastened and
adjusted seat belts to restrain both the driver and
the front seat passenger in the proper position for an
airbag deployment. The knee blockers also absorb
and distribute the crash energy from the driver and
the front seat passenger to the structure of the
instrument panel.
Typically, the driver and front seat passenger recall
more about the events preceding and following a col-
lision than they have of the airbag deployment itself.
This is because the airbag deployment and deflation
occur so rapidly. In a typical 48 kilometer-per-hour
(30 mile-per-hour) barrier impact, from the moment
of impact until both airbags are fully inflated takes
about 40 milliseconds. Within one to two seconds
from the moment of impact, both airbags are almost
entirely deflated. The times cited for these events are
approximations, which apply only to a barrier impact
at the given speed. Actual times will vary somewhat,
depending upon the vehicle speed, impact angle,
severity of the impact, and the type of collision.
When the ACM monitors a problem in any of the
airbag system circuits or components, it stores a
fault code or Diagnostic Trouble Code (DTC) in its
memory circuit and sends an electronic message to
the EMIC to turn on the airbag indicator. Proper
testing of the airbag system components, the
Chrysler Collision Detection (CCD) data bus, the
data bus message inputs to and outputs from the
EMIC or the ACM, as well as the retrieval or erasure
of a DTC from the ACM requires the use of a
DRBIIItscan tool. Refer to the appropriate diagnos-
tic information.
See the owner's manual in the vehicle glove box for
more information on the features, use and operation
of all of the factory-installed passenger restraints,
including the airbag system.
WARNING
WARNING: THE AIRBAG SYSTEM IS A SENSITIVE,
COMPLEX ELECTROMECHANICAL UNIT. BEFORE
ATTEMPTING TO DIAGNOSE OR SERVICE ANY AIR-
BAG SYSTEM OR RELATED STEERING WHEEL,STEERING COLUMN, OR INSTRUMENT PANEL
COMPONENTS YOU MUST FIRST DISCONNECT
AND ISOLATE THE BATTERY NEGATIVE (GROUND)
CABLE. THEN WAIT TWO MINUTES FOR THE SYS-
TEM CAPACITOR TO DISCHARGE BEFORE FUR-
THER SYSTEM SERVICE. THIS IS THE ONLY SURE
WAY TO DISABLE THE AIRBAG SYSTEM. FAILURE
TO DO THIS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.
WARNING: THE DRIVER AIRBAG INFLATOR UNIT
CONTAINS SODIUM AZIDE AND POTASSIUM
NITRATE. THESE MATERIALS ARE POISONOUS
AND EXTREMELY FLAMMABLE. CONTACT WITH
ACID, WATER, OR HEAVY METALS MAY PRODUCE
HARMFUL AND IRRITATING GASES (SODIUM
HYDROXIDE IS FORMED IN THE PRESENCE OF
MOISTURE) OR COMBUSTIBLE COMPOUNDS. THE
PASSENGER AIRBAG UNIT CONTAINS ARGON GAS
PRESSURIZED TO OVER 2500 PSI. DO NOT
ATTEMPT TO DISMANTLE AN AIRBAG UNIT OR
TAMPER WITH ITS INFLATOR. DO NOT PUNCTURE,
INCINERATE, OR BRING INTO CONTACT WITH
ELECTRICITY. DO NOT STORE AT TEMPERATURES
EXCEEDING 93É C (200É F).
WARNING: REPLACE AIRBAG SYSTEM COMPO-
NENTS ONLY WITH PARTS SPECIFIED IN THE
DAIMLERCHRYSLER MOPAR PARTS CATALOG.
SUBSTITUTE PARTS MAY APPEAR INTERCHANGE-
ABLE, BUT INTERNAL DIFFERENCES MAY RESULT
IN INFERIOR OCCUPANT PROTECTION.
WARNING: THE FASTENERS, SCREWS, AND
BOLTS ORIGINALLY USED FOR THE AIRBAG SYS-
TEM COMPONENTS HAVE SPECIAL COATINGS
AND ARE SPECIFICALLY DESIGNED FOR THE AIR-
BAG SYSTEM. THEY MUST NEVER BE REPLACED
WITH ANY SUBSTITUTES. ANY TIME A NEW FAS-
TENER IS NEEDED, REPLACE IT WITH THE COR-
RECT FASTENERS PROVIDED IN THE SERVICE
PACKAGE OR SPECIFIED IN THE DAIMLER-
CHRYSLER MOPAR PARTS CATALOG.
WARNING: WHEN A STEERING COLUMN HAS AN
AIRBAG UNIT ATTACHED, NEVER PLACE THE COL-
UMN ON THE FLOOR OR ANY OTHER SURFACE
WITH THE STEERING WHEEL OR AIRBAG UNIT
FACE DOWN.
BR/BERESTRAINTS 8O - 3
RESTRAINTS (Continued)

STANDARD PROCEDURE - PRE DELIVERY
STORAGE
(1) If possible, store vehicles indoors, in clean, dry
places. If vehicles must be stored outdoors:
²Try to avoid storage locations that are near any
obvious sources of industrial or environmental con-
tamination (e.g., trees, factories, steam or vapor
vents, railroad tracks, etc.)
²Maintain tight security to help prevent pilferage
and vandalism, and inspect each vehicle regularly to
check for such damage
²If the vehicle must be parked on an incline, park
it with the front end higher than the rear; this will
prevent ªhydrostatic lockº caused by fuel draining
into the engine
²Rinse the vehicle at least once a week. Snow
should be washed away more often, since it can trap
harmful contaminants. Dry all horizontal surfaces
(2) The IOD fuse should be removed in order to
prevent battery drain and possible damage.
(3) Check the vehicle's coolant and anti-freeze pro-
tection.
(4) Check the vehicle's battery at least once a
month for a proper charge (at least 12.4 volts).
Charge the battery if necessary. This will help pre-
vent freezing and deterioration.
(5) Check the vehicle's tires and inflate them to
their maximum recommended levels. Move the vehi-
cles periodically to avoid ªflatspottingº the tires.
(6) Do not engage the parking brake; keep it in the
OFF position.
(7) Keep all windows closed, all doors locked, and
all trim covers intact and in place.
(8) Do not use chalks, crayons or any marker con-
taining abrasives on painted, plated or glass sur-
faces.
(9) Always use seat covers when moving a vehicle.
PROGRAMMABLE
ELECTRONIC FEATURES
DESCRIPTION
The programming of electronic features applies to
specific DaimlerChrysler Corporation vehicles. Not
all vehicles are equipped with these electronic fea-
tures, and not all vehicles equipped with electronic
features have all the available features. Programma-
ble electronic features are subject to change and may
be added or deleted from specific vehicle models.
(1) The programmable electronic features that may
be provided on the vehicle are:
²Rolling Power Door Locks
²Horn Chirp (When Doors Locked With Remote
Keyless Entry)²Headlamp Flash (When Doors Locked or
Unlocked With Remote Keyless Entry)
²Low Fuel Chime
²Remote Keyless Entry Door Unlock Sequence
²Headlights On Automatically With Wipers
²Turn Signal Chime
²12V Power Outlet
²Remote Unlock
²Remote Linked To Memory
²Headlamp Delay
²Service Interval
²Easy Exit Seat
(2) Programming any of the above features is to be
performed prior to vehicle delivery to the customer,
depending on customer preference.
NOTE: For all vehicles except Caravan/Town and
Country, the programming must be performed using
the DRB IIITscan tool. On Caravan/Town and Coun-
try vehicles the features can be programmed using
the DRB IIITscan tool or by button pushing
sequences. The customer can perform program-
ming, if desired, by following the instructions out-
lined in the owner manual.
OPERATION
NOTE: The programmable features provided on
vehicles need to be explained to the customer at
the time of sale. The customer's preferences con-
cerning the features should be noted and pro-
grammed accordingly during predelivery.
NOTE: When using the DRB IIITscan tool to enable/
disable any programmable electronic features, go to
the main menu item #9 on the DRB IIITscan tool.
This is ªCustomer Preferencesº. You must choose
ªCustomer Preferencesº on the main menu to pro-
gram the desired features.
ROLLING POWER DOOR LOCKS
With this feature enabled, the vehicle's door lock-
ing mechanisms automatically lock when the vehicle
reaches approximately 24 Km/h (15 mph).
HORN CHIRP
NOTE: This feature can be enabled with or without
the headlamp flash feature.
The horn chirp function is a feature that can be
enabled or disabled on vehicles equipped with
30 - 20 NEW VEHICLE PREPARATIONBR/BE
PRE DELIVERY STORAGE (Continued)

Remote Keyless Entry (RKE). The horn chirps when
the vehicle is locked with the RKE transmitter.
HEADLAMP FLASH
NOTE: This feature can be enabled with or without
the horn chirp feature.
The headlamp flash function is a feature that can
be enabled or disabled on vehicles equipped with
Remote Keyless Entry (RKE). The headlamps flash
once when the vehicle is locked with the RKE trans-
mitter, and flash twice when the vehicle is unlocked
with the RKE transmitter.
LOW FUEL CHIME
All vehicles equipped with the audible low fuel
chime are shipped with this feature enabled.
REMOTE KEYLESS ENTRY (RKE) DOOR UNLOCK
SEQUENCE
Two door unlock sequences are provided on vehi-
cles equipped with this feature. When using the RKE
transmitter to unlock the doors, pressing the unlock
button once when the feature is enabled unlocks only
the driver's door. Pushing the RKE transmitter
unlock button a second time unlocks the remaining
doors. When the RKE door unlock feature is disabled,
all doors unlock with one press of the RKE transmit-
ter unlock button.
HEADLIGHTS ON AUTOMATICALLY WITH WIPERS
This feature appears on vehicles that have, as an
option, automatic headlights. When the windshield
wipers are turned on, the headlights automatically
turn on.
12V POWER OUTLET
This feature currently appears on Caravan/Voyag-
er/Town and Country vehicles. The vehicles are
shipped with the 12V power outlets turned off with
the ignition key. The relay can be changed to make
the outlets powered at all times. This feature may be
of interest to customers with cell phones.
TURN SIGNAL CHIME
This feature is an audible turn signal warning
chime. The chime sounds if the turn signal is on, the
vehicle has traveled one mile and vehicle speed has
exceeded 40 Km/h (25 mph).
REMOTE UNLOCK
The remote unlock function is a feature that can be
enabled or disabled on vehicles equipped with
Remote Keyless Entry (RKE). With the first press of
the RKE transmitter to unlock the doors, the driver's
door only unlocks. With the second press of the RKEtransmitter, the remaining doors and the liftgate
unlock. With the remote unlock feature enabled, the
first press of the RKE transmitter unlocks all doors.
REMOTE LINKED TO MEMORY
The remote linked to memory function is currently
only available only on Jeep Grand Cherokee Limited
vehicles. When enabled, this feature recalls a mem-
ory of seats, mirror and radio presets and positions
when unlocking the vehicle with the RKE transmit-
ter.
HEADLAMP DELAY
Currently available only on Jeep Grand Cherokee
vehicles, the headlamp delay timeout can be set to
30, 60 or 90 seconds. This timeout only occurs when
the ignition is turned off prior to turning the head-
lamps off, or when leaving the headlamps in AUTO
mode.
SERVICE INTERVAL
Currently available only on Jeep Grand Cherokee
vehicles, the interval for the service reminder mes-
sage can be set from 3,219 kilometers to 12,070 kilo-
meters (2,000 miles to 7,500 miles).
EASY EXIT SEAT
Currently available only on Jeep Grand Cherokee
Limited vehicles, the driver's seat will reposition
55mm (2.1 inches) rearward, or the end of travel if
less than 55mm (2.1 inches) and full downward when
the key is removed from the ignition. This feature
allows ease of exiting the vehicle. The seat will repo-
sition itself to the memory location when the vehicle
is unlocked using the RKE transmitter or by pressing
the memory buttons on the door panel.
APPEARANCE TIPS
CLEANING
(1) Before delivering the new vehicle to the cus-
tomer, the following checks on appearance details are
recommended:
²Wash the vehicle to remove all traces of road
grime and other dirt on the car from new vehicle
preparation operations
²Clean the tire sidewalls
²Clean exterior and interior glass surfaces
²Remove all protective covers
²Remove undercoat overspray, excess window
sealer, and excess weatherstrip adhesive
²Inspect interior trim, seats, carpeting, and mold-
ings. Clean as necessary
²Remove shipping and inspection stickers
BR/BENEW VEHICLE PREPARATION 30 - 21
PROGRAMMABLE ELECTRONIC FEATURES (Continued)