The audible warnings alert the driver of a system concern or a critical vehicle condition. The audio amplifier generates the audible warnings through the left front speaker. The audio amplifier receives audible warning requests via the serial data circuit.
If the audio amplifier 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 audio amplifier activates the fasten safety belt audible warning as requested by the body control module (BCM). The BCM sends a serial data message to the audio amplifier indicating the chime frequency at a slow rate and a duration of 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 inflatable restraint sensing and diagnostic module (SDM) detects that the driver's 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 panel cluster (IPC)
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 audio amplifier activates the lights on warning as requested by the body control module (BCM). The BCM sends a serial data message to the audio amplifier indicating the chime frequency of a fast rate and at a continuous duration. 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 audio amplifier activates the brake audible warning as requested by the instrument panel cluster (IPC). The IPC sends a serial data message to the audio amplifier indicating the chime frequency and duration. The brake audible warning sounds and the
BRAKE indicator illuminates when the following occurs:
| • | The vehicle speed is greater than 4 km/h (2.5 mph). The IPC receives a serial data message from the engine control module (ECM) indicating the vehicle speed. |
| • | The IPC determines that the park brake is engaged from a BCM serial data message. |
| • | The brake fluid is low. |
| • | The dynamic rear proportioning (DRP) failed (if equipped) |
Key-In-Ignition Warning
The audio amplifier activates the key-in-ignition audible warning as requested by the body control module (BCM). The BCM sends a serial data message to the radio indicating the chime frequency of a medium rate and continuous duration. 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. The IPC also receives a serial data message from the BCM indicating the door ajar status |
| • | The BCM determines that the key-in-ignition switch is open and the signal circuit is high. The IPC receives a serial data message from the BCM indicating the key-in-ignition status. |
Door Ajar Warning
The audio amplifier activates the door ajar audible warning as requested by the IPC. The IPC sends a serial data message to the radio indicating the chime frequency. The door ajar warning sounds and the door ajar message is displayed in the DIC when the
following occurs:
| • | The IPC determines that the driver door is open and the signal circuit is low. The IPC also displays the appropriate door ajar message in the DIC. |
| • | The vehicle is not in PARK. The IPC receives a serial data message from the BCM indicating the gear position. |
Additional Audible Warnings
The following instrument panel cluster (IPC) indicators or driver information center (DIC) messages have an associated audible warning to alert the driver of a system concern or critical vehicle condition. The audio amplifier activates the audible warning
as requested by the IPC via the serial data circuit.
| • | Antilock Brake System (ABS) |
| • | Vehicle Dynamics Caution (VDC) |
| • | Hot coolant temperature |
| • | Low engine oil pressure |
| • | Transmission Hot Idle Engine |
| • | Buckle Passenger Seat Belt |
| • | Engine Overheated Stop Engine |
Refer to
Indicator/Warning Message Description and Operation.
