Brake Warning System Description and Operation

Brake Warning System Description and Operation

Brake System Indicator(s)
Reference numbers are used in conjunction with a DIC warning message on export vehicles only.

Brake System
The IPC illuminates the brake indicator when the following occurs:
^ The IPC detects that the park brake is engaged (signal circuit is low), If the vehicle travels 10 - 50 feet (3 - 15.2 meters) with the park brake engaged, the IPC sends a class 2 message to the radio in order to activate an audible warning.
^ The IPC detects a low brake fluid condition (signal circuit is low). The IPC sends a class 2 message to the radio in order to activate an audible warning.
^ The electronic brake control module (EBCM) detects a failure 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 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 5 seconds.
^ The IPC detects a loss of class 2 communications with the EBCM and the discrete back-up ABS indicator signal circuit is high.

BRAKE FLUID LOW - 37 (with DIC)
The IPC illuminates the 13RAKE FLUID LOW - 37 indicator in the DIC when the IPC detects a low brake fluid condition (signal circuit is low). The IPC sends a class 2 message to the radio in order to activate an audible warning.

PARK BRAKE SET - 147 (with DIC)
The IPC illuminates the PARK BRAKE SET - 147 indicator in the DIC when the IPC detects that the park brake is engaged (signal circuit is low). If the vehicle travels 10 - 50 feet (3 - 15.2 meters) with the park brake engaged, the IPC sends a class 2 message to the radio in order to activate an audible warning.