Audible Warnings Description and Operation
The audible warnings alert the driver of a system concern or a
critical vehicle condition. The radio generates the audible
warnings through the speakers. The radio receives audible warning
requests via the serial data circuit. If the radio receives
multiple audible warning requests, the warning with the highest
priority sounds first. On vehicles without a radio, a chime module
generates the audible warnings and receives audible warning
requests via the serial data circuit. Either the radio or the chime
module is the chime producer. The following lists the audible
warning sounds:
Fasten Safety Belt Warning
The chime producer activates the fasten safety belt audible
warning as requested by the body control module (BCM). The BCM
sends a serial data message to the chime producer indicating the
chime as a multiple gong. The fasten safety belt warning sounds and
the fasten safety belt indicator illuminates when the following
occurs:
• |
The ignition switch
transitions to ON. |
• |
The inflatable restraint
sensing and diagnostic module (SDM) detects that the drivers seat
belt is not buckled and the signal is low. The SDM sends a serial
data message to the BCM indicating the seat belt status. The
instrument cluster receives a serial data message from the BCM
indicating the driver seat belt status. |
If the seat belt is buckled when the ignition is turned ON, the
chime does not sound. If the seat belt is buckled while the chime
is sounding, the chime stops. If the seat belt is unbuckled after
the initial transition to ON, the chime does not sound.
Lights On Warning
The chime producer activates the lights on warning as requested
by the BCM. The BCM sends a serial data message to the chime
producer indicating the chime as a multiple gong. The lights on
warning sounds when the following occurs:
• |
The BCM determines that the
driver door is open and the signal circuit is low. |
• |
The BCM determines that the
headlamp switch is in the park or head position. |
Brake Warning
The chime producer activates the brake audible warning as
requested by multiple control modules. The BCM, electronic brake
control module or the parking brake control module sends a serial
data message to the chime producer indicating the chime as a
multiple gong. The brake warning sounds and the BRAKE indicator
illuminates when the following occurs:
• |
The vehicle speed is greater
than 8 km/h (4.9 MPH). The instrument cluster receives a serial
data message from the engine control module (ECM) indicating the
vehicle speed. |
• |
The BCM determines that the
parking brake is engaged and the signal circuit is low.
|
• |
The brake fluid is low.
|
Key-In-Ignition Warning
The chime producer activates the key-in-ignition audible warning
as requested by the BCM. The BCM sends a serial data message to the
chime producer indicating the chime as a multiple gong. The
key-in-ignition warning sounds when the following occurs:
• |
The ignition switch is
OFF. |
• |
The BCM determines that the
driver door is open and the signal circuit is low. |
Door Ajar Warning
The chime producer activates the door ajar audible warning as
requested by the BCM. The BCM sends a serial data message to the
chime producer indicating the chime frequency of a medium rate and
continuous duration. The door ajar warning sounds and the
appropriate door ajar indicator illuminates in the driver
information center when the following occurs:
• |
The BCM determines that a door
(driver door, passenger door, left rear door, right rear door) is
open and the signal circuit is low. The instrument cluster also
receives a serial data message from the BCM indicating the door
ajar status. |
• |
The vehicle is not in PARK.
The BCM receives a serial data message from the ECM/BCM indicating
the gear position. |
Object Detection
The chime producer activates the object detection audible
warning as requested by the object alarm module. When an object is
within the measuring range of the sensor, the ultrasonic pulse is
reflected and is received by the sending or a neighboring sensor.
The sensor converts this signal into a voltage signal and sends
this signal to the object alarm module. The object alarm module
evaluates the received sensor signals. As soon as an object is
within the measuring range, the object alarm module sends a message
via CAN-Bus to the chime producer in order to give out the acoustic
distance signal. The measuring range is between 30-120 cm
(11.81-47.24 in). From a distance of 120 cm (47.24 in), the
acoustic signal is active. The frequency of the beep sound
increases with decreasing distance. From a distance less than 30 cm
(11.81 in), the sound becomes continuous.
Additional Warnings
The following warnings have an associated instrument cluster
indicator or driver information center message:
• |
Turn Signal Indicators-The
chime producer activates the audible warning as requested by the
BCM. The chime produces 2 different chimes, one when the turn
signal turns off and another when the turn signal turns on.
|
• |
Vehicle Overspeed Message-The
chime producer activates the audible warning as requested by the
BCM. The BCM sends a serial data message to the chime
producer. |
• |
Fuel Level Low Message-The
chime producer activates the audible warning as requested by the
BCM. The BCM sends a serial data message to the chime
producer. |
• |
Oil Pressure Indicator-The
chime producer activates the audible warning as requested by the
BCM. The BCM sends a serial data message to the chime
producer. |
• |
Park Assist Fault Clean Rear
Bumper Message-The chime producer activates the audible warning as
requested by the BCM. The BCM sends a serial data message to the
chime producer. |
• |
Tire Pressure Low
Indicator-The chime producer activates the audible warning as
requested by the BCM. The BCM sends a serial data message to the
chime producer. |
• |
Park Assist Fault Clean Rear
Bumper Message-The chime producer activates the audible warning as
requested by the BCM. The BCM sends a serial data message to the
chime producer. |
Refer to
Indicator/Warning Message Description and Operation .
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