Brake Warning Indicator
The instrument panel cluster (IPC) illuminates the brake warning indicator
when one or more of 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 requesting illumination. |
| • | The electronic brake control module (EBCM) detects a low brake
fluid condition. The IPC receives a class 2 message from the EBCM
requesting illumination. |
| • | The electronic brake control module (EBCM) detects a closed brake
pressure differential switch. The IPC receives a class 2 message
from the EBCM requesting illumination. |
| • | The EBCM detects an ABS malfunction which disables dynamic rear
proportioning (DRP). The IPC receives a class 2 message from the EBCM
requesting illumination. |
| • | The IPC detects a closed power brake booster alarm switch and
closed power brake booster fluid flow alarm switch. The IPC illuminates the
brake warning indicator and sends a class 2 message to the radio requesting
the brake warning alarm. |
| • | The IPC performs the bulb check at the start of each ignition
cycle. The brake warning indicator illuminates for approximately 3 seconds
before turning OFF. |
| • | The IPC detects a loss of class 2 communications with the
BCM or with the EBCM. |
