Warning System Operation

PURPOSE
The brake system continuously monitors all of its components and uses several methods of determining a fault and notifying the driver of a system malfunction. When the vehicle is started, a functional check of the ABS electrical circuitry is performed.

OPERATION
As the vehicle speed reaches 4 mph (6 kph), an additional check of the speed sensors and hydraulic modulator takes place. During this check each valve is cycled and the pump motor is fumed on briefly. The clicking sound of the valves and buzzing noise of the motor pump may be heard by the driver when the vehicle begins to move. This test will occur only once per ignition cycle and should be considered normal operation. Two methods are used to inform the driver that a malfunction has occurred in the brake system. The red "BRAKE" warning light and amber "ANTILOCK" warning light, both located on the front of the instrument panel, will notify the driver if a problem exists in the brake system or with the antilock portion of the brake system.