Hino 600, Workshop Manual, Page: 410 / 451

ABS (ABS : FULL AIR) BR03–7
PRECAUTIONS WHEN DRIVING VEHICLES EQUIPPED WITH ABS
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Electronically, ABS uses the coefficient of friction (the amount of traction) between the tires and the road surface to monitor the
speed of each wheel. If one or more wheels indicates the possibility of locking, resulting in fishtailing or other loss of stability,
ABS enables the vehicle to be brought to a stop. Even with ABS, however, a driver must operate the vehicle in a safe manner
and recognize the following points with respect to the operation of ABS.
OTHER CHECKPOINTS REGARDING HANDLING
1. When washing the vehicle, take care not to direct high-pressure streams of water at the ABS control valves, harnesses, or
connectors. Also, under no circumstances should the ABS ECU or electrical relays be exposed to water.
2. Be very careful not to damage the ABS wire harness when removing snow, ice, mud or other material from the outside or
underside of the vehicle.
3. All electronic and radio equipment installed on the vehicle must be mounted as far away from the ABS ECU and wire
harness as possible. Installation of certain electronic and radio equipment can also cause the ABS ECU to malfunction.
All such equipment must also conform to all applicable laws. If you wish to install a radio or other electronic equipment,
please contact your Hino service representative.
CHECK POINTS REMEDIAL ACTIONS
Even with ABS, the braking distance on a wet or slippery
road will be longer than on a dry road, and if the road
surface is covered with ice, snow or gravel, the braking
distance will be even greater.
Even with ABS, always drive safely, tak-
ing into consideration the road and traffic
conditions and the condition of your tires,
including tire type and tire wear. Always
keep a safe distance from any vehicle
being driven in front of you.
ABS does not operate when the vehicle is starting, ac-
celerating or turning, and will not assist in maintaining
directional stability or steerability or in shortening the brak-
ing distance.
Even if the ABS is operational, where the coefficient of
friction is very low, such as on an icy roadway, skidding,
inability to steer, and instability may occur because of
insufficient traction by the tires.
Where engine braking, as a result of downshifting, oc-
curs on a surface with a low coefficient of friction, such
as ice, the drive wheels may lock, causing fishtailing or
vehicle instability. ABS does not operate unless the brake
pedal is applied.
If the ABS engages, the vehicle's air consumption rate
will be higher than usual.
When ABS is activated, the driver may experience a small
amount of vibration (especially if the road surface be-
tween the left and right tires is different) and difficulty in
steering. Also, the operation of the ABS may generate
some noise.
The ABS warning light will come on when you turn the
starter switch to the "on" position. It stays on briefly and
then turns off automatically. If the light does not come
on, have your vehicle inspected and serviced immedi-
ately at your nearest HIno service dealer.
If engine braking causes instability or fish-
tailing, the clutch should be engaged or
the transmission shifted to neutral, to pre-
vent the application of the engine brak-
ing to the drive wheels.
If the air pressure becomes low and the
air pressure warning light comes on and
a buzzer sounds, immediately stop the
vehicle in a safe place. Begin driving
again only after the return to normal air
pressure.
Vibrations and noise during the operation
of ABS are not malfunctions. Remain calm
and continue to steer the vehicle in an
appropriate manner.
If the warning llight lights up again when
you reach a speed about 6 km/h (4 mph)
the ABS system may not be functioning
properly. Have it inspected and repaired
if necessary *
The warning light can be reset by turn-
ing off the engine while the vehicle is
at rest. If the warning light fails to go
out after the engine is restarted and the
speed indicated above is reached, or if
it lights frequency while the vehicle
is being driven, the ABS must be
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