Dodge Durango (DN). Manual — part 313

equipment on this model. The Remote Keyless Entry
(RKE) system, illuminated entry system and power
windows are included on vehicles equipped with the
power door lock option. Refer to 8W-61 - Power Door
Locks in Group 8W - Wiring Diagrams for complete
circuit descriptions and diagrams.

POWER LOCK SYSTEM

The power lock system allows all four doors and

the liftgate to be locked or unlocked electrically by
operating the switch on either front door trim panel.
The power lock system operates on non-switched bat-
tery current supplied through a fuse in the junction
block so that the system remains functional, regard-
less of the ignition switch position.

The power lock system includes the power lock

switches on each front door trim panel, and the
power lock motors inside each door and the liftgate.
The power lock control circuitry and the power lock
and unlock relays are integral to the high-line ver-
sion of the Central Timer Module (CTM), which is
mounted under the instrument panel.

Following are general descriptions of the major

components in the power lock system. Refer to the
owner’s manual in the vehicle glove box for more

information on the features, use and operation of the
power lock system.

REMOTE KEYLESS ENTRY SYSTEM

The Remote Keyless Entry (RKE) system is a radio

frequency system that allows the use of a remote bat-
tery-powered radio transmitter to control the power
lock system. On vehicles with the RKE option, the
power locks can be operated by depressing the Lock
or Unlock buttons of the RKE transmitter. If the
vehicle is so equipped, the RKE transmitter also
arms and disarms the factory-installed vehicle theft
alarm. Refer to Group 8Q - Vehicle Theft/Security
Systems for more information on the optional vehicle
theft alarm.

The RKE system includes an illuminated entry fea-

ture, which turns on the courtesy lamps for a timed
interval (about thirty seconds), when the power door
locks are unlocked using the RKE transmitter. The
RKE system for this vehicle also features a program-
mable horn chirp, a programmable driver door
unlock, a programmable rolling door lock, and a
panic feature.

The programmable horn chirp feature allows the

enabling or disabling of the horn chirp request that
the RKE receiver issues as an audible indication that
a valid Lock signal has been received from the RKE
transmitter. The programmable driver door unlock
feature allows one press of the RKE transmitter

POWER LOCK SYSTEMS

8P - 1

Unlock button to unlock just the driver door, and a
second press within five seconds to unlock all doors
and the liftgate. If disabled, one press of the RKE
transmitter Unlock button will unlock all doors and
the liftgate. The rolling door lock feature will lock all
of the doors and the liftgate above a vehicle speed of
about 24 kilometers-per-hour (15 miles-per-hour).
These features can be enabled or disabled using a
DRB scan tool as described in the proper Diagnostic
Procedures manual. These features can also be
enabled/disabled using the customer programmable
feature. See the owner’s manual in the vehicle glove
box for more information on the customer program-
mable feature.

The panic feature allows the vehicle operator to

cause the horn to pulse, the headlights to flash and
the courtesy lamps to light for about three minutes
by depressing the Panic button on the RKE transmit-
ter. A second depression of the Panic button, or a
vehicle speed of about 24 kilometers-per-hour (15
miles-per-hour) will turn off the panic event prior to
the expiration of the automatic three minute timer.

The RKE system can retain the vehicle access

codes of up to four RKE transmitters. The transmit-
ter codes are retained in RKE system memory, even
if the battery is disconnected. If a transmitter is
faulty or is lost, new transmitter vehicle access codes
can be programmed into the system using a DRB
scan tool as described in the proper Diagnostic Pro-
cedures manual. If one functional transmitter is
available, up to three additional transmitters can be
programmed using the customer programmable fea-
ture. See the owner’s manual in the vehicle glove box
for more information on the customer programmable
feature.

The RKE system consists of a driver unlock relay,

a headlamp (or security) relay, a horn relay, a key fob
remote radio transmitter and a radio receiver with
program logic, which is integral to the high-line ver-
sion of the Central Timer Module (CTM).

Following are general descriptions of the major

components in the RKE system. Refer to the owner’s
manual in the vehicle glove box for more information
on the features, use and operation of the RKE sys-
tem.

DESCRIPTION AND OPERATION

CENTRAL TIMER MODULE

Two versions of the Central Timer Module (CTM)

are available on this vehicle, a base version and a
high-line version. The base version of the CTM is
used on base models of the vehicle. The base version
of the CTM combines the functions of a chime/buzzer
module, an intermittent wipe module, and an illumi-
nated entry module into a single unit. The base CTM

also uses inputs from the door ajar switches, the
headlamp switch and the key-in ignition switch to
control the output to the dome lamp circuits, which
allows the base CTM to provide load shedding to help
protect the battery from becoming discharged.

The high-line version of the CTM is used on high-

line vehicles. The high-line CTM provides all of the
functions of the base version CTM, but also is used to
control and integrate many of the additional elec-
tronic functions and features included on the high-
line models. The high-line version of the CTM
contains a central processing unit and interfaces with
other modules in the vehicle on the Chrysler Colli-
sion Detection (CCD) data bus network.

The CCD data bus network allows the sharing of

sensor information. This helps to reduce wire har-
ness complexity, reduce internal controller hardware,
and reduce component sensor current loads. At the
same time, this system provides increased reliability,
enhanced diagnostics, and allows the addition of
many new feature capabilities.

The high-line CTM controls features and functions

of the power lock, illuminated entry, and Remote
Keyless Entry (RKE) systems. The high-line CTM
receives hard wired inputs from the power lock
switches, CCD message inputs from the Powertrain
Control Module (PCM) and Airbag Control Module
(ACM), and coded radio frequency inputs from the
RKE transmitters. In response to those and many
other inputs, the internal programming of the CTM
sends the proper outputs to control the power lock
motors, the headlamp and horn relays, and the cour-
tesy lamps.

Some of the features and functions of the power

lock, illuminated entry and RKE systems made pos-
sible because of the communication of the CTM on
the CCD data bus network include:

• A door-lock inhibit feature which prevents the

power lock system from being energized with a power
door lock switch when the driver door is open if the
key is in the ignition and/or the headlamps are on.
However, the locks can still be operated manually,
with a key, or energized with the RKE transmitter.

• A programmable driver door unlock feature. The

driver door unlock feature allows one press of the
RKE transmitter Unlock button to unlock just the
driver door, and a second press within five seconds to
unlock all doors and the liftgate. If disabled, one
press of the RKE transmitter Unlock button will
unlock all doors and the liftgate.

• A panic mode feature which can provide addi-

tional personal security and protection. When the
Panic button on the RKE transmitter is depressed
the vehicle horn will pulse, the headlights will flash,
and the interior lights will illuminate on the vehicle
for about three minutes, or until the Panic button is

8P - 2

POWER LOCK SYSTEMS

GENERAL INFORMATION (Continued)

depressed a second time. A vehicle speed of about 24
kilometers-per-hour (15 miles-per-hour) will also can-
cel the panic event.

• A central locking feature. Central locking allows

all the doors and the liftgate to be locked when a key
is used in either front door lock cylinder to lock
either front door. Similarly, central locking will also
unlock all the doors and the liftgate when the key is
rapidly cycled twice to the unlock position in either
front door lock cylinder. This feature uses inputs
from the two door lock cylinder switches, which are
components of the Vehicle Theft Security System
(VTSS). Refer to Group 8Q - Vehicle Theft/Security
Systems for more information on the door lock cylin-
der switches.

• An enhanced accident response feature will

unlock all doors and the liftgate, then prevent the
power door lock system from locking the doors and
liftgate for a predetermined time interval, after
receiving a CCD message from the ACM indicating a
frontal impact of the vehicle requiring airbag deploy-
ment. This feature will also turn on the courtesy
lamps ten seconds after receiving the ACM deploy-
ment message, if the CCD vehicle speed message
from the PCM indicates that the vehicle is not mov-
ing. Of course, these responses are dependent upon
functional battery power and wiring circuitry follow-
ing the impact.

• Rolling door locks is a programmable feature of

the power lock system. This feature will automati-
cally lock all of the doors and the liftgate after the
vehicle reaches a speed of about 24 kilometers-per-
hour (15 miles-per-hour) or greater. This feature will
also lock the doors if a door is opened, then closed
again, at any speed above 24 kilometers-per-hour (15
miles-per-hour).

• A programmable feature of the RKE system is

the enabling or disabling of the horn chirp following
activation of the RKE Lock function. This feature can
be enabled or disabled and, if enabled, the horn chirp
duration

(twenty

forty

milliseconds)

can

selected.

Both versions of the CTM are mounted under the

passenger side end of the instrument panel, outboard
of the instrument panel glove box opening. Refer to
Central Timer Module in the Removal and Installa-
tion section of Group 8E - Instrument Panel Systems
for the service procedures.

The programmable features of the CTM can be

enabled or disabled using the DRBIII

t scan tool as

described in the proper Diagnostic Procedures man-
ual. These features can also be enabled/disabled
using the customer programmable feature. See the
owner’s manual in the vehicle glove box for more
information on the customer programmable feature.
Refer to Central Timer Module in the Diagnosis and

Testing section of Group 8U for diagnosis of the base
version of the CTM. For diagnosis of the high-line
version of the CTM or of the CCD data bus, a
DRBIII

t scan tool and the proper Diagnostic Proce-

dures manual are recommended. The CTM cannot be
repaired and, if faulty or damaged, it must be
replaced.

POWER LOCK SWITCH

The power locks can be controlled by a two-way

switch integral to the power window and lock switch
unit on the driver side front door trim panel, or a
two-way single gang switch on the passenger side
front door trim panel. The power lock switch controls
the battery feeds to the lock and unlock sense inputs
of the high-line Central Timer Module (CTM). The
CTM then relays the correct battery and ground
feeds to the power lock motors. A Light-Emitting
Diode (LED) in the paddle of each switch is illumi-
nated whenever the ignition switch is in the On posi-
tion.

The driver side power window and lock switch unit

cannot be repaired and, if faulty or damaged, the
entire switch unit must be replaced. The passenger
side power lock switch cannot be repaired and, if
faulty or damaged, the switch must be replaced.

POWER LOCK MOTOR

In the power lock and Remote Keyless Entry

(RKE) systems, the door and liftgate latch lock mech-
anisms can be actuated by a reversible electric motor.
The power lock motor is integral to the door latch
mounted within each door. A separate power lock
motor is used to actuate the liftgate latch.

The power lock motor direction is controlled by the

battery and ground feeds from the power lock and
unlock relays, which are integral to the high-line
Central Timer Module (CTM). The RKE receiver
within the CTM can also unlock just the driver door
through a separate driver door unlock relay that is
located in the relay and fuse block attached to the
back of the junction block under the instrument
panel.

The power door lock motors cannot be repaired

and, if faulty or damaged, the entire door latch unit
must be replaced. The power liftgate lock motor is
serviced separately.

REMOTE KEYLESS ENTRY TRANSMITTER

The Remote Keyless Entry (RKE) system transmit-

ter is equipped with three buttons, labeled Lock,
Unlock, and Panic. It is also equipped with a key
ring and is designed to serve as a key fob. The oper-
ating range of the transmitter radio signal is up to 7
meters (23 feet) from the RKE receiver.

POWER LOCK SYSTEMS

8P - 3

DESCRIPTION AND OPERATION (Continued)

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