Brake System Indicator
The body control module (BCM) sends a message to the IPC via the serial
peripheral interface (SPI) requesting illumination. The IPC illuminates the
brake indicator when the following occurs:
| • | The BCM detects that the park brake is engaged. If the vehicle
speed is greater than 5 km/h (3.1 mph) with the park brake
engaged, the BCM sends a class 2 message to the radio in order to
activate an audible warning. |
| • | The BCM detects a low brake fluid condition, signal circuit is
low. The BCM also sends a class 2 message to the radio
in order to activate an audible warning. |
| • | The BCM detects a malfunction in the brake fluid level circuit.
The BCM also sends a class 2 message to the radio in order to activate
an audible warning. |
| • | The electronic brake control module (EBCM) detects a malfunction
in the braking system. The BCM receives a class 2 message from the
EBCM requesting illumination. The BCM also sends a class 2 message
to the radio in order to activate an audible warning. |
| • | The IPC performs the displays test at the start of each ignition
cycle as commanded by the BCM. The indicator illuminates for approximately
3 seconds. |
