The chime warning system operates on battery voltage received through a fuse in the Totally Integrated Power Module
(TIPM) on a non-switched fused B(+) circuit so that the system may operate regardless of the ignition switch
position. The chime warning system also monitors the ignition switch position so that some chime features are functional
only with the ignition switch in the ON position, while others are functional regardless of the ignition switch
position.
The chime warning system provides an audible indication to the vehicle operator or occupants under the following
conditions:
² Airbag Indicator Warning - The ElectroMechanical Instrument Cluster (EMIC) transducer will generate one
short chime when the ignition switch is in the ON position, and an electronic message is received over the
Controller Area Network (CAN) data bus from the Occupant Restraint Controller (ORC) requesting airbag indicator
illumination. This warning will only occur following completion of the airbag indicator bulb test, and will
only occur once during any ignition cycle.
² Compass Mini-Trip Computer Global Reset - The EMIC transducer will generate one short chime when the
ignition switch is in the ON position, and an electronic message is received over the CAN data bus from the
optional Compass Mini-Trip Computer (CMTC) requesting that the CMTC average fuel economy, trip odometer
and distance to empty data be reset. The CMTC monitors hard wired inputs from the US/M and RESET button
switches to determine the proper reset messages to send to the EMIC.
² Door Ajar Indicator Warning - The EMIC transducer will generate one short chime when the ignition switch
is in the ON position, a hard wired input is received indicating that the status of any door ajar switch has
changed, and an electronic message is received over the CAN data bus indicating that the vehicle is moving.
² Engine Coolant Temperature High Warning (Diesel Engine Only) - The EMIC transducer will generate a
single chime tone when the check gauges indicator is illuminated for a high or critical engine coolant temperature
condition. The instrument cluster uses engine coolant temperature message inputs received from the
diesel Engine Control Module (ECM) over the CAN data bus to illuminate the check gauges indicator for a
coolant temperature high condition.
² Fasten Seat Belt Indicator Warning - The EMIC transducer will generate repetitive chimes at a slow rate to
announce that a hard wired input from the seat belt switch indicates that the driver side front seat belt is not
fastened with the ignition switch in the ON position. The chime warning system also supports the enhanced
seatbelt reminder (beltminder) when this feature is enabled. (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER/
SEATBELT INDICATOR - OPERATION).
² Head/Park Lamps-On Warning - The EMIC transducer will generate repetitive chimes at a fast rate to indicate
that hard wired inputs from the driver door ajar switch, the headlamp switch, and the ignition switch indicate
that the exterior lamps are turned ON with the driver side front door opened and the ignition switch in the
OFF position. The chimes will continue to sound until the exterior lamps are turned OFF, the driver side front
door is closed, or the ignition switch is turned to the ON position, whichever occurs first.
² Key-In-Ignition Warning - The EMIC transducer will generate repetitive chimes at a fast rate to indicate that
hard wired inputs from the driver door ajar switch, the ignition switch, and the key-in ignition switch circuitry of
the ignition switch indicate that the key is in the ignition lock cylinder with the driver side front door open and
the ignition switch in the OFF position. The chimes will continue to sound until the key is removed from the
DR CHIME/BUZZER - SERVICE INFORMATION 8B - 13
ignition lock cylinder, the driver side front door is closed, or the ignition switch is turned to the ON position,
whichever occurs first.
² Low Fuel Indicator Warning - The EMIC transducer will generate one short chime when the low fuel indicator
is illuminated by the instrument cluster circuitry. This chime will only occur once during any ignition cycle.
² Low Oil Pressure Warning (Diesel Engine Only) - The EMIC transducer will generate repetitive chimes at a
fast rate when the check gauges indicator is illuminated for a low oil pressure condition. The instrument cluster
uses engine speed and oil pressure message inputs received from the diesel Engine Control Module (ECM)
over the CAN data bus indicating that the engine is running and that the oil pressure is low to illuminate the
check gauges indicator. The chimes will continue to sound for five seconds, until the engine oil pressure message
indicates that the oil pressure is not low, or until the engine speed message indicates that the engine is
not running, whichever occurs first. This chime will only occur once during any ignition cycle.
² Low Wash Indicator Warning - The EMIC transducer will generate one short chime when the low washer
fluid indicator is illuminated by the instrument cluster circuitry. This chime will only occur once during any ignition
cycle.
² Overspeed Warning - The EMIC transducer will generate repetitive chimes at a slow rate to indicate that the
vehicle speed is over a pre-programmed speed value. The EMIC monitors electronic vehicle speed messages
received over the CAN data bus. This feature is only enabled on an EMIC that has been programmed with a
Middle East Gulf Coast Country (GCC) country code.
² Park Brake Reminder - The EMIC transducer will generate one short chime to announce that the hard wired
input from the park brake switch and a vehicle speed message input received over the CAN data bus indicate
that the park brake is applied and the vehicle is moving. This chime will repeat each time the input conditions
are met.
² Sentry Key Customer Learn Mode Announcement - The EMIC transducer will generate one short chime to
confirm that an electronic Customer Learn mode message has been received over the CAN data bus to indicate
the Sentry Key REmote Entry Module (SKREEM) is prepared for programming additional sentry key transponders.
This chime feature is only active on vehicles equipped with the optional Sentry Key system, and
sold in a market where Customer Learn programming is an allowed feature.
² Trans Overtemp Indicator Warning (Automatic Transmission Only) - The EMIC transducer will generate
repetitive chimes at a slow rate when the transmission overtemp indicator is illuminated by the instrument cluster
for a high or critical transmission fluid temperature condition. This chime will repeat each time the trans
overtemp indicator is cycled from off to on.
² Turn Signal/Hazard Warning Flasher Emulation - The EMIC relay will generate repetitive clicks at a slow
rate to emulate an electromechanical flasher when the turn signal or hazard warning system are operating.
The EMIC relay will generate repetitive clicks at a fast rate to indicate that the right or left turn signal are
operating with one or more bulbs inoperative. In either case, the clicks will continue until the turn signal and
hazard warning systems are turned OFF.
² Turn Signal On Warning - The EMIC transducer will generate repetitive chimes at a slow rate to indicate that
a turn signal has been active continuously for 1.6 kilometers (one mile) with the vehicle speed greater than 22
kilometers-per-hour (15 miles-per hour). Vehicles built for markets other than the United States and Canada
have a revised distance threshold of 4 kilometers for this feature. The chime will continue until the turn signal
input becomes inactive or until the vehicle speed message indicates that the speed is less than 22 kilometersper-
hour (15 miles-per-hour), whichever occurs first. The hazard warning flashers will not activate this chime
feature.
² Warning Indicator Announcement - The EMIC transducer will generate one short chime each time the check
gauges indicator is illuminated by the instrument cluster circuitry. The check gauges indicator may be illuminated
when any critical engine or transmission systems are operating outside of their normal parameters. The
instrument cluster monitors electronic messages received over the CAN data bus to determine when to illuminate
the check gauges indicator.
The EMIC provides chime service for all available features in the chime warning system. The EMIC relies upon its
internal programming, numerous hard wired inputs, and electronic message inputs received from other modules
over the CAN data bus network to provide the chime warning system features. The internal programming of the
EMIC determines the priority of each chime request input that is received, as well as the rate and duration of each
chime that is to be generated.
The hard wired chime warning system inputs to the EMIC may be diagnosed and tested using conventional diagnostic
tools and procedures. However, conventional diagnostic methods may not prove conclusive in the diagnosis
of the EMIC, the CAN data bus, or the electronic messages received by the EMIC from other modules. The most
reliable, efficient and accurate means to diagnose the EMIC, the CAN data bus, or the electronic message inputs
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