9-7X L6-4.2L (2008)
Brake Warning Indicator: Description and Operation
Brake Warning System Description and Operation
Brake Warning Indicator
The instrument panel cluster (IPC) illuminates the brake warning indicator when one or more of the following occurs:
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The body control module (BCM) detects that the park brake is engaged. The IPC receives a class 2 message from the BCM requesting
illumination.
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The electronic brake control module (EBCM) detects a low brake fluid condition. The IPC receives a class 2 message from the EBCM
requesting illumination.
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The EBCM detects an ABS malfunction which disables dynamic rear proportioning (DRP). The IPC receives a class 2 message from the
EBCM requesting illumination.
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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.
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The IPC detects a loss of class 2 communications with the BCM or with the EBCM.
