Liberty 4WD V6-3.7L VIN K (2003)
Brake Warning Indicator: Description and Operation
ABS AND RED BRAKE WARNING INDICATOR
The amber ABS warning indicator is located in the instrument cluster. It is used to inform the driver that the antilock function has been turned off due
to a system malfunction. On the KJ, the CAB controls the lamp indirectly. The CAB monitors its own functions. If the CAB determines that the ABS
indicator should be on, the CAB sends a message via the PCI BUS to the instrument cluster and the cluster turns on the indicator. The instrument
cluster sends an "are you there" message over the PCI BUS, if the CAB does not respond the instrument cluster will illuminate the ABS indicator.
The red brake warning indicator is located in the instrument cluster. It can be activated by application of the parking brake, a leak in the front or rear
wheel brake hydraulic circuit which causes the master cylinder reservoir to be low on fluid, or by turning the ignition switch to the start position. The
red brake warning indicator can also be turned on if the brake fluid level switch circuit becomes open or shorted to ground.
