Volvo VN Series Service Manual page 107

Group 177
D
Check ABS System
To do the brake test safely, make sure there are
no other vehicles within 300 yards when testing, or
perform the test in a off-road area where there is no
traffic. Performing brake test in traffic may lead to an
accident, personal injury or death.
W5000614
Check the ABS system by attempting to lock up the
wheels during hard braking. The vehicle should come to
a controlled stop. Brake from a speed of 50 to 55 km/h
(30 to 35 mph). Make a full brake application.
Note: The rear wheels may lock intermittently while
driving unloaded under 30 km/h (20 mph) even when
equipped with ABS brakes. This is normal in unloaded
operation.
Also check that the ABS telltale indicator comes on and
goes out at approximately 8 km/h (5 mph).
DANGER
Preventive Maintenance
105