The audible warnings alert the driver of a system concern
or a critical vehicle condition. The radio generates the audible warnings
through the left front speaker. The radio receives audible warning requests
via the class 2 serial data line from the body control module (BCM).
If the radio receives multiple audible warning requests, the warning with
the highest priority sounds first. The following lists the audible warning
priority and the pulse rate:
- Fast rate chime - 200 pulses per minute
- Medium rate chime - 150 pulses per minute
- Slow rate chime - 50 pulses per minute
- Single chime
Fasten Safety Belt Warning
The radio activates the fasten safety belt audible warning as requested
by the body control module (BCM). The BCM sends a class 2 message
to the radio indicating the chime of a slow rate frequency and an 8 second
duration. The fasten safety belt warning sounds and the fasten safety belt
indicator illuminates when the following occurs:
| • | The ignition switch transitions to ON. |
| • | The BCM detects that the driver's seat belt is not buckled and
the signal circuit is low. The IPC receives a message via the serial peripheral
interface (SPI) from the BCM requesting illumination of the seat belt indicator. |
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.
Key-In-Ignition Warning
The radio activates the key-in-ignition audible warning as requested
by the body control module (BCM). The BCM sends a class 2 message
to the radio indicating the chime of a medium rate frequency and a continuous
duration. The key-in-ignition warning sounds when the following occurs:
| • | The ignition switch is OFF. |
| • | The body control module (BCM) determines that the driver door
is open and the signal circuit is low. |
| • | The BCM determines that the key-in-ignition switch is closed and
the signal circuit is low. |
Lights On Warning
The radio activates the lights on warning as requested by the body control
module (BCM). The BCM sends a class 2 message to the radio indicating
the chime of a fast rate frequency and duration (continuous). The lights
on warning sounds when the following occurs:
| • | The ignition is OFF (key out of the ignition). |
| • | The BCM determines that the driver door is open (signal circuit
is low). |
| • | The BCM determines that the headlamp switch is in the park or
head position. |
Park Brake Warning
The radio activates the park brake audible warning as requested by the
body control module (BCM). The BCM sends a class 2 message to the
radio indicating the chime of a fast rate frequency and a continuous duration.
The park brake warning sounds and the brake indicator illuminates when
the following occurs:
| • | The vehicle speed is greater than 5 km/h (3.1 mph).
The BCM receives a class 2 message from the PCM indicating the vehicle
speed. |
| • | The BCM determines that the park brake is engaged and the signal
circuit is low. |
| • | The vehicle is not in park. The BCM receives a class 2
message from the PCM indicating the gear position. |
Turn Signal On
The radio activates the turn signal on audible warning as requested
by the body control module (BCM). The BCM sends a class 2 message
to the radio indicating the chime at a fast rate frequency and a continuous
duration. The turn signal on warning sounds when the following occurs:
| • | The BCM detects that the turn signal is active for greater than
1.2 km (0.75 mi). The BCM calculates the distance based on
a class 2 message from the PCM indicating the vehicle speed. |
Additional Warnings
The following warnings have an associated IPC indicator:
| • | High Engine Coolant Temperature |
| • | Low Engine Coolant Level |
| • | Low Engine Oil Pressure |
The BCM sends a class 2 message to the radio indicating the chime
at a medium rate frequency and a 3 second duration. The warning sounds
once per ignition cycle when an indicator illuminates and the engine is
running for greater than 6.5 seconds.
Refer to
Indicator/Warning Message Description and Operation
.
