Operator`s manual

OPERATION
330
The ABS control unit contains a self-testing program that is engaged
each time the ignition is turned on. The operator can verify the testing
by listening for the ABS modulator valves actuating twice in series. To
increase the sound, hold down the foot brake pedal when the ignition is
turned on.
If any of the ABS tell-tales come on during driving or do not go out after
a short time after turning on the ignition, take the vehicle to an
authorized Volvo Truck dealer to repair the ABS or brake system. The
vehicle can still be driven with a problem in the ABS system. However,
ABS will not be working and the standard braking system will be in
effect.
ABS Malfunction Truck/Tractor
The instrument cluster also contains an ABS tell-tale lamp, which
indicates when there is a problem being reported by the Trailer ABS
system.
ABS Malfunction Trailer
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