Dodge Dakota 2001, Руководство по обслуживанию

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CHIME/BUZZER
TABLE OF CONTENTS
page page
CHIME WARNING SYSTEM
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
DIAGNOSIS AND TESTING . . . . . . . . . . . . . . . . . . 3
CHIME WARNING SYSTEM . . . . . . . . . . . . . . . . 3
CHIME WARNING SYSTEM
DESCRIPTION
A chime warning system is standard factory-in-
stalled equipment on this model. The chime warning
system uses a single chime tone generator that is
integral to the Central Timer Module (CTM) to pro-
vide an audible indication of various vehicle condi-
tions that may require the attention of the vehicle
operator. The chime warning system includes the fol-
lowing major components, which are described in fur-
ther detail elsewhere in this service manual:
•
Central Timer Module - The Central Timer
Module (CTM) is located on the cowl side inner
panel, below the driver side end of the instrument
panel. The CTM contains an integral chime tone gen-
erator, integrated circuitry, a central processing unit,
and the programming to provide all of the proper
chime warning system features based upon the mon-
itored inputs. The CTM circuitry monitors hard
wired switch inputs as well as electronic messages
received from other electronic modules in the vehicle
over the Programmable Communications Interface
(PCI) data bus network.
•
Door Ajar Switch - Door ajar switches are
integral to each door latch. These switches provide
inputs to the chime warning system indicating
whether a door is opened or closed.
•
Headlamp Switch - The headlamp switch is
located on the instrument panel outboard of the
steering column. The headlamp switch provides input
to the chime warning system indicating whether any
interior or exterior lighting is turned On or Off.
•
Ignition Switch - A key-in ignition switch is
integral to the ignition switch. The key-in ignition
switch provides an input to the chime warning sys-
tem indicating whether a key is present in the igni-
tion lock cylinder.
Hard wired circuitry connects many of the chime
warning system components to each other through
the electrical system of the vehicle. These hard wired
circuits are integral to several wire harnesses, which
are routed throughout the vehicle and retained by
many different methods. These circuits may be con-
nected to each other, to the vehicle electrical system
and
to the chime warning system components
through the use of a combination of soldered splices,
splice block connectors, and many different types of
wire harness terminal connectors and insulators.
Refer to the appropriate wiring information. The wir-
ing information includes wiring diagrams, proper
wire and connector repair procedures, further details
on wire harness routing and retention, as well as
pin-out and location views for the various wire har-
ness connectors, splices and grounds.
The CTM chime warning system circuitry and the
integral chime tone generator cannot be adjusted or
repaired. If the CTM or the chime tone generator are
damaged or faulty, the CTM unit must be replaced.
OPERATION
The chime warning system is designed to provide
an audible output as an indication of various condi-
tions that may require the attention or awareness of
the vehicle operator. The chime warning system com-
ponents operate on battery current received through
a fused B(+) fuse in the Junction Block (JB) on a
non-switched fused B(+) circuit so that the system
may operate regardless of the ignition switch posi-
tion.
The chime warning system provides an audible
indication to the vehicle operator under the following
conditions:
•
Compass Mini-Trip Computer (CMTC)
Reset - The Central Timer Module (CTM) chime tone
generator will generate one chime tone each time a
Programmable Communications Interface (PCI) data
bus message is received from the optional CMTC
indicating that the CMTC data has been reset.
•
Door Ajar Warning - The CTM chime tone gen-
erator will generate repetitive chime tones at a slow
rate to announce that a hard wired input from any
door ajar switch indicates that a door is open with
the ignition switch in the On position. The chimes
will continue to sound until the all doors are closed
or the ignition switch is turned to the Off position,
whichever occurs first.
•
Fasten Seat Belt Warning - The CTM chime
tone generator will generate repetitive chime tones at
AN
CHIME/BUZZER 8B - 1