Antilock Braking System (Abs) - Blue Bird D3RE 2014 Driver's Handbook Manual

Air Brake/Throttle Interlock System (Optional)
All Americans equipped with air brakes may include an optional Brake/Throttle Inter-
lock feature which, when active, automatially applies the service brake and disables
the throttle when the vehicle ignition is on and the lift or entrance door is open.
A Brake Override switch in the Driver's left switch panel enables the Driver to
temporarily override the interlock system.
[WARNING] The brake interlock is a safety device and is not intended to be
used as a parking brake. The Interlock system should never be used to stop the
bus. Do not open the bus door(s) while the vehicle is in motion.
Parking
Use the dash mounted valve to apply the rear spring brake when parking the bus.
When the parking brake is applied, and the ignition switch is ON, a dash-mounted
yellow light labeled PARK will warn the driver that the brake is applied.
[CAUTION] Do not attempt to move bus before spring brakes are released.
Draining Air Tanks
Condensation must be drained from the air tanks daily. To drain tanks properly, leave
the drain cocks open until all air escapes and draining stops.

Antilock Braking System (ABS)

In a vehicle equipped with an antilock braking system (ABS), motion sensors detect
the speeds at which the wheels move. These sensors transmit this information to an
Electronic Control Unit (ECU). If the wheels start to lock, the ECU signals the modula-
tor assembly to regulate the brake pressure of each locking wheel.
An ABS indicator lamp on the dash (see "Indicator Light Panel" in Instrument
Panel section) warns the driver of possible system faults and provides blink code
information to diagnose the system. If this light is activated during normal vehicle
operation, the driver may complete the trip, but the vehicle must be serviced as
quickly as possible.
ROUTINE OPERATION
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