Brake Warning System Description and Operation

Brake Warning System Description and Operation

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.