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. 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 frequency (slow rate) and duration
(8 seconds). 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 (signal
circuit is low). The IPC receives a class 2 message from the BCM
indicating the driver's 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.
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 frequency (medium rate) and duration (continuous).
The key-in-ignition warning sounds when the following occurs:
| • | The ignition switch is OFF. |
| • | The BCM determines that the driver's door is open (signal circuit
is low). |
| • | The BCM determines that the ignition key alarm switch is closed
(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 frequency (fast rate) and duration (continuous). The lights
on warning sounds when the following occurs:
| • | The BCM determines that the driver's 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 frequency (fast rate) and duration (continuous).
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 (signal circuit
is low). |
Turn Signal On Warning
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 frequency (single chime in phase with
turn signal indicator) and duration (continuous). 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
frequency (medium rate) and duration (3 seconds). The warning sounds
once per ignition cycle when an indicator illuminates and the engine
is running for greater than 6.5 seconds.
For a description of each indicator, refer to
Indicator/Warning Message Description and Operation
.
