FAW J6 Jiefang IV Series, Operation Manual

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Jiefang J6 China IV, China V series instruction
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Maintenance
Use of ABS/ASR (optional)
ABS is an electronic control system that monitors
and controls the vehicle speed during braking. It can
prevent the locking of the wheels caused by
excessive brake force, so that the vehicle can
maintain the lateral traction force under the
condition of full braking, ensuring the stability of
the driving, the steering control of the vehicle and
the optimum effect of braking coordination of the
main trailer; At the same time the brake friction
between the available tire and the road surface as
well as the optimization of vehicle deceleration and
braking distance are also guaranteed.
ASR function is another main function of ABS
system. It can improve the stability and
maneuverability of the vehicle's starting and
accelerating direction, obtain the most appropriate
driving force and improve the adhesion
performance when the vehicle starts and accelerates,
and improve the starting ability of the vehicle.
When starting, ASR ensures that the braking power
of each driving wheel can be adjusted
independently at low speed by applying appropriate
braking moment or reducing engine torque to the
driving wheel so as to utilize the driving force of
each driving wheel fully, obtain the maximum
traction force, and improve the starting acceleration
performance of the vehicle.
ABS/ASR system consists of ECU, wheel speed
sensor and sensor wire, gear ring, anti-lock solenoid
valve, ABS indicator lamp, ASR alarm lamp, ASR
mandatory switch, ASR solenoid valve, double-way
valve, engine control interface, etc.
Do not step on the brake pedal repeatedly.
Depressing the brake pedal repeatedly will cause
the ABS control command to be broken down,
resulting in a decrease in braking capacity and an
increase in braking distance.
If the wheels are not locked and the front wheels
still have the guiding function when the ABS is
emergency braking , emergency can be avoided by
both braking and steering the wheel.
The ABS wheel sensor and ring gear are installed
on the wheel, so the sensor probe and the tooth
circle should always be kept clean to prevent mud
and oil stains, especially ferromagnetic material
adhering to its surface, which will cause sensor to
fail or transmit wrong signal to the ECU and affect
the normal operation of ABS.
Vehicles should strictly follow the prescribed tire
pressure standards, and at the same time maintain
the balance of coaxial tire pressure. It is strictly
prohibited to use tires with different specifications.
Pay attention to check the clearance between the
wheel speed sensor and the ring gear. If the
clearance is too large, the sensor can be pushed in
by hand to make the sensor lean against the upper
gear ring, otherwise it will directly affect the normal
operation of ABS.
Caution
If ABS lamp is on with the vehicle running, it
indicates the ABS system has fault. However, the
regular brake still is active and the driving is safe.
However, such vehicles should be diagnosed and
repaired as soon as possible at the designated
maintenance plant to restore the ABS system
function to normal condition.