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