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 class 2 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 class 2
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 class 2
message from the EBCM requesting illumination. The IPC sends a class 2
message to the BCM indicating that the brake indicator is illuminated due
to a brake malfunction. The BCM sends a class 2 message to the radio
in order to activate an audible warning. |
| • | The EBCM detects a malfunction in the braking system. The IPC
receives a class 2 message from the EBCM requesting illumination. The
IPC sends a class 2 message to the BCM indicating that the brake
indicator is illuminated due to a brake malfunction. The BCM 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. The indicator illuminates for approximately 3 seconds. |
| • | The IPC detects a loss of class 2 communications with the
EBCM. |
