B3000 V6-3.0L (2007)
Audible Warning Device: Description and Operation
WARNING DEVICES
The warning device system consists of the following components.
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Instrument cluster
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Safety belt warning indicator switch, which is an integral part of the driver safety belt retractor pretensioner
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Key-in-ignition warning switch
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Door ajar switch(es)
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Smart junction box (SJB)
The following chimes are controlled by the instrument cluster
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Safety belt warning
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Safety belt minder
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Air bag warning
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Door ajar warning
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Headlamps on warning
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Parking brake applied key-in-ignition warning
Principles of Operation
The warning chimes are designed to provide the driver with an audio warning that acts as a supplemental alert The only deviation from this strategy is
the air bag chime which is used to alert the driver that the primary alerting system does not operate. The instrument cluster controls all warning chimes
except for the belt minder, which is controlled by the restraint control module (RCM).
Each warning chime has unique characteristics that help to identify and differentiate each warning chime. The warning chimes use volume, chime
frequency, length of time the chime sounds and the number of chime tones to identify which chime is sounding. The instrument cluster prioritizes the
chimes according to a preset hierarchy programmed into the instrument cluster software. When more than one chime request is received by the
instrument cluster, the most important chime sounds. If a lower priority chime is currently sounding, the higher priority request takes over and replaces
the lower priority chime. Refer to the following table for a summary of the chime characteristics including the chime priority.
Safety Belt WARNING Chime
The safety belt warning chime alerts the driver that the safety belt is unbuckled. The safety belt chime sounds when the driver safety belt is unbuckled
and the ignition switch is turned from the OFF to the RUN or START position. The safety belt warning chime stops when the safety belt is fastened,
when the ignition is switched to the OFF position or after the chime has sounded for 6 seconds.
Safety Belt Minder
The safety belt minder feature is configurable. See SMART JUNCTION BOX (SJB). To configure without using a scan tool, see SAFETY BELT
MINDER DEACTIVATING/ACTIVATING.
The safety belt minder feature supplements the current driver safety belt warning function. The safety belt minder feature is enabled after the current
safety belt warning is complete. The safety belt minder reminds the driver that the safety belt is unbuckled by intermittently sounding a chime and
illuminating the safety belt warning indicator in the instrument cluster once the vehicle speed has exceeded 4.83 km/h (3 mph). While activated, the
safety belt minder alternates the chime and the safety belt indicator from on for 6 seconds to off for 30 seconds.
Door Ajar WARNING Chime
When any door is ajar and the ignition switch is in the RUN position, the door ajar warning indicator is activated and remains on until all doors are
closed. A one second warning tone sounds once anytime the key is in the ignition switch and any door is opened.
