Dodge Durango (DN). Manual - part 319

position. Check for battery voltage at the fused igni-
tion switch output (run/start) circuit cavity of the
automatic day/night mirror wire harness connector. If
OK, go to Step 4. If not OK, repair the open circuit to
the junction block as required.

(4) Turn the ignition switch to the Off position.

Disconnect and isolate the battery negative cable.
Check for continuity between the ground circuit cav-
ity of the automatic day/night mirror wire harness
connector and a good ground. There should be conti-
nuity. If OK, go to Step 5. If not OK, repair the cir-
cuit to ground as required.

(5) Connect the battery negative cable. Turn the

ignition switch to the On position. Set the parking
brake. Place the transmission gear selector lever in
the Reverse position. Check for battery voltage at the
backup lamp switch output circuit cavity of the auto-
matic day/night mirror wire harness connector. If
OK, go to Step 6. If not OK, repair the open circuit
as required.

(6) Turn the ignition switch to the Off position.

Disconnect the battery negative cable. Plug in the
automatic day/night mirror wire harness connector.
Connect the battery negative cable. Turn the ignition
switch to the On position. Place the transmission
gear selector lever in the Neutral position. Place the
mirror switch in the On (the LED in the mirror
switch is lighted) position. Cover the forward facing
ambient photocell sensor to keep out any ambient
light.

NOTE: The ambient photocell sensor must be cov-
ered completely, so that no light reaches the sen-
sor. Use a finger pressed tightly against the sensor,
or cover the sensor completely with electrical tape.

(7) Shine a light into the rearward facing head-

lamp photocell sensor. The mirror glass should
darken. If OK, go to Step 8. If not OK, replace the
faulty automatic day/night mirror unit.

(8) With the mirror glass darkened, place the

transmission gear selector lever in the Reverse posi-
tion. The mirror should return to its normal reflec-
tance. If not OK, replace the faulty automatic day/
night mirror unit.

REMOVAL AND INSTALLATION

AUTOMATIC DAY/NIGHT MIRROR

(1) Disconnect and isolate the battery negative

cable.

(2) Unplug the wire harness connector from the

automatic day/night mirror (Fig. 2).

(3) Remove the set screw that secures the auto-

matic day/night mirror to the windshield support
button.

(4) Push the automatic day/night mirror upwards

far enough for the mounting bracket to clear the sup-
port button and remove the mirror from the wind-
shield support button.

(5) Reverse the removal procedures to install.

Tighten the mounting screw to 1.7 N·m (15 in. lbs.).

Fig. 1 Automatic Day/Night Mirror

1 – REAR FACING SENSOR
2 – CONNECTOR
3 – FORWARD FACING SENSOR
4 – SWITCH

Fig. 2 Automatic Day/Night Mirror Remove/Install

1 – ON/OFF SWITCH
2 – ELECTRICAL CONNECTOR

8T - 6

POWER MIRROR SYSTEMS

DIAGNOSIS AND TESTING (Continued)

CHIME/BUZZER WARNING SYSTEMS

TABLE OF CONTENTS

page

GENERAL INFORMATION

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . 1
CHIME WARNING SYSTEM . . . . . . . . . . . . . . . . . 1

DESCRIPTION AND OPERATION

CENTRAL TIMER MODULE . . . . . . . . . . . . . . . . . 1
INSTRUMENT CLUSTER. . . . . . . . . . . . . . . . . . . . 2
DRIVER DOOR AJAR SWITCH . . . . . . . . . . . . . . . 2
KEY-IN IGNITION SWITCH . . . . . . . . . . . . . . . . . . 2
HEADLAMP SWITCH . . . . . . . . . . . . . . . . . . . . . . 2
DRIVER SEAT BELT SWITCH . . . . . . . . . . . . . . . . 2

DIAGNOSIS AND TESTING

CENTRAL TIMER MODULE . . . . . . . . . . . . . . . . . 3
DRIVER DOOR AJAR SWITCH . . . . . . . . . . . . . . . 3
KEY-IN IGNITION SWITCH . . . . . . . . . . . . . . . . . . 4
HEADLAMP SWITCH . . . . . . . . . . . . . . . . . . . . . . 4
DRIVER SEAT BELT SWITCH . . . . . . . . . . . . . . . . 5
INSTRUMENT CLUSTER. . . . . . . . . . . . . . . . . . . . 5

REMOVAL AND INSTALLATION

CHIME WARNING SYSTEM SWITCHES . . . . . . . . 5

GENERAL INFORMATION

INTRODUCTION

A chime warning system is standard factory-in-

stalled equipment on this model. Refer to 8W-44 -
Interior Lighting or 8W-45 - Central Timer Module in
Group 8W - Wiring Diagrams for complete circuit
descriptions and diagrams.

CHIME WARNING SYSTEM

The chime warning system provides an audible

warning to the driver under the following conditions:

• ABS lamp illumination

• Airbag indicator lamp illumination

• Check gauges lamp illumination

• Door is ajar with vehicle in motion

• Driver side seat belt is not fastened with the

ignition switch in the On position

• Head or park lamps are turned on with the igni-

tion switch Off and the driver side front door open

• Key is in the ignition switch with the ignition

switch Off and the driver side front door open

• Low fuel warning lamp illumination - less than

about one-eighth tank of fuel remaining

• Low washer fluid warning lamp illumination

• Transmission oil temperature warning lamp illu-

mination.

Following are general descriptions of the major

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

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.

One of the functions and features that both ver-

sions of the CTM support is the chime warning sys-
tem. The CTM contains a chime tone generator to
perform the functions of the chime warning module.
The CTM uses hard-wired switch inputs, internal

CHIME/BUZZER WARNING SYSTEMS

8U - 1

programming, and a hard-wired chime request input
from the instrument cluster circuitry to detect when
a chime tone is required.

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.

This group covers the diagnosis and service of only

the hard-wired inputs used by the CTM to determine
that a chime tone should be generated. See Central
Timer Module in the Diagnosis and Testing section of
this group 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 Procedures manual are
recommended. The CTM cannot be repaired and, if
faulty or damaged, it must be replaced.

INSTRUMENT CLUSTER

The instrument cluster is an electromechanical

unit that contains integrated circuitry and internal
programming to perform a variety of functions. The
instrument cluster circuitry monitors hard-wired
switch inputs, as well as message inputs received
from other vehicle electronic modules on the Chrysler
Collision Detection (CCD) data bus network.

The instrument cluster uses these many inputs

along with its internal programming to provide hard-
wired chime tone requests to the Central Timer Mod-
ule (CTM), which performs the functions of the chime
warning module on this model. The instrument clus-
ter circuitry also has a self-diagnostic capability.
Refer to Instrument Cluster in the Diagnosis and
Testing section of Group 8E - Instrument Panel Sys-
tems for more information on this feature.

The only instrument cluster diagnosis found in this

group consists of confirming the viability of the hard-
wired chime request circuit between the instrument
cluster circuitry and the CTM, and diagnosis of the
hard-wired seat belt switch input to the instrument
cluster. For diagnosis of the CCD data bus and the
data bus message inputs, a DRB scan tool and the
proper Diagnostic Procedures manual are recom-
mended.

Refer to Instrument Cluster in the Removal and

Installation section of Group 8E - Instrument Panel
Systems for the instrument cluster service proce-
dures. Refer to the Diagnosis and Testing section of
Group 8E - Instrument Panel systems for more infor-
mation on the remaining hard-wired instrument clus-
ter inputs. The instrument cluster chime warning
circuitry cannot be repaired and, if faulty or dam-
aged, the instrument cluster assembly must be
replaced.

DRIVER DOOR AJAR SWITCH

The driver door ajar switch is integral to the driver

side front door latch. The switch closes a path to
ground for the Central Timer Module (CTM) when
the driver door is opened, and opens the ground path
when the driver door is closed.

The driver door ajar switch cannot be repaired

and, if faulty or damaged, the door latch unit must
be replaced. Refer to Group 23 - Body for the door
latch service procedures.

KEY-IN IGNITION SWITCH

The key-in ignition switch is integral to the igni-

tion switch, which is mounted on the right side of the
steering column. It closes a path to ground for the
Central Timer Module (CTM) when the ignition key
is inserted in the ignition lock cylinder and the
driver door ajar switch is closed (driver door is open).
The key-in ignition switch opens the ground path
when the key is removed from the ignition lock cyl-
inder. The ground path is also opened when the
driver door ajar switch is open (driver door is closed).

The key-in ignition switch cannot be repaired and,

if faulty or damaged, the entire ignition switch must
be replaced. Refer to Group 8D - Ignition Systems for
the service procedures.

HEADLAMP SWITCH

The headlamp switch is located in the instrument

panel, outboard of the steering column. It closes a
path to ground for the Central Timer Module (CTM)
when the park or head lamps are on and the driver
door ajar switch is closed (driver door is open). The
headlamp switch opens the ground path when the
headlamp switch is turned off. The ground path is
also opened when the driver door ajar switch is open
(driver door is closed).

The headlamp switch cannot be repaired and, if

faulty or damaged, it must be replaced. Refer to
Headlamp Switch in the Removal and Installation
section of Group 8E - Instrument Panel Systems for
the service procedures.

DRIVER SEAT BELT SWITCH

The driver seat belt switch is integral to the driver

seat belt retractor assembly. The driver seat belt
switch is normally closed, providing a ground signal
to the instrument cluster when the ignition switch is
in the On or Start positions.

The seat belt switch monitors the amount of seat

belt webbing wound onto the seat belt retractor
spool. When the seat belt tip-half webbing is pulled
out of the retractor far enough to engage the seat
belt buckle-half, the switch opens the seat belt switch
sense circuit.

8U - 2

CHIME/BUZZER WARNING SYSTEMS

DESCRIPTION AND OPERATION (Continued)

The driver seat belt switch cannot be repaired and,

if faulty or damaged, the entire driver seat belt and
retractor unit must be replaced. Refer to Group 23 -
Body for the service procedures.

DIAGNOSIS AND TESTING

CENTRAL TIMER MODULE

Before testing the Central Timer Module (CTM) for

an inoperative chime function, be sure to test the
hard-wired switch and instrument cluster chime
request circuits as described in this group. For circuit
descriptions and diagrams, refer to 8W-45 - Central
Timer Module in Group 8W - Wiring Diagrams.

NOTE: The following tests may not prove conclu-
sive in the diagnosis of the high-line version of the
Central Timer Module (CTM). The most reliable, effi-
cient, and accurate means to diagnose the high-line
CTM requires the use of a DRB scan tool and the
proper Diagnostic Procedures manual.

WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,

REFER

GROUP

PASSIVE

RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING

WHEEL,

STEERING

COLUMN,

INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.

(1) Check the fuses in the junction block. If OK, go

to Step 2. If not OK, repair the shorted circuit or
component as required and replace the faulty fuse.

(2) Check for battery voltage at the fuse in the

junction block. If OK, go to Step 3. If not OK, repair
the open circuit to the Power Distribution Center
(PDC) as required.

(3) Disconnect and isolate the battery negative

cable. Remove the CTM from its mounting bracket to
access the CTM wire harness connectors. Refer to
Central Timer Module in the Removal and Installa-
tion section of Group 8E - Instrument Panel Systems
for the procedures.

(4) Unplug the wire harness connectors from the

CTM. Check the wire harness connectors and the
receptacles in the module for loose, corroded, or dam-
aged terminals and pins. If OK, go to Step 5. If not
OK, repair as required.

(5) Probe the ground circuit cavity of the 14-way

CTM wire harness connector and check for continuity
to a good ground. On the high-line version of the
CTM, repeat the check between the ground circuit
cavity of the 18-way CTM wire harness connector

and a good ground. In each case, there should be con-
tinuity. If OK, go to Step 6. If not OK, repair the
open circuit(s) to ground as required.

(6) Connect the battery negative cable. Check for

battery voltage at the fused B(+) circuit cavity of the
14-way CTM wire harness connector. If OK, go to
Step 7. If not OK, repair the open circuit to the junc-
tion block as required.

(7) Turn the ignition switch to the On position.

Check for battery voltage at the fused ignition switch
output (run/start) circuit cavity of the 14-way CTM
wire harness connector. On the high-line version of
the CTM, repeat the check at the fused ignition
switch output (run/accessory) circuit cavity of the
18-way CTM wire harness connector. If OK, replace
the faulty CTM. If not OK, repair the open circuit
from the CTM to the junction block as required.

DRIVER DOOR AJAR SWITCH

For circuit descriptions and diagrams, refer to

8W-45 - Central Timer Module in Group 8W - Wiring
Diagrams.

WARNING: ON VEHICLES EQUIPPED WITH AIR-
BAGS,

REFER

GROUP

PASSIVE

RESTRAINT SYSTEMS BEFORE ATTEMPTING ANY
STEERING

WHEEL,

STEERING

COLUMN,

INSTRUMENT PANEL COMPONENT DIAGNOSIS OR
SERVICE. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIR-
BAG DEPLOYMENT AND POSSIBLE PERSONAL
INJURY.

(1) Rotate the headlamp switch knob counterclock-

wise to ensure that the dome lamps are not switched
off. Open the driver door and note whether the inte-
rior lamps light. They should light. If OK, see Key-In
Ignition Switch and/or Headlamp Switch in the Diag-
nosis and Testing section of this group. If not OK, go
to Step 2.

(2) Disconnect and isolate the battery negative

cable. Unplug the driver door latch wire harness con-
nector. Check for continuity between the ground cir-
cuit cavity in the body half of the driver door latch
wire harness connector and a good ground. There
should be continuity. If OK, go to Step 3. If not OK,
repair the circuit to ground as required.

(3) Check for continuity between the driver door

ajar switch ground circuit terminal and the driver
door ajar switch sense circuit terminal of the driver
door latch wire harness connector. There should be
continuity with the driver door open, and no continu-
ity with the driver door closed. If OK, go to Step 4. If
not OK, replace the faulty latch.

(4) Remove the Central Timer Module (CTM) from

its mounting bracket to access the CTM wire harness
connectors. Refer to Central Timer Module in the

CHIME/BUZZER WARNING SYSTEMS

8U - 3

DESCRIPTION AND OPERATION (Continued)

Content .. 317 318 319 320 ..