ABS
32
ANTI-LOCK BRAKES
WORKSHOP TESTING
Any malfunction in the ABS is signaled by the
warning lamp in the instrument cluster, which can
be later on diagnosed at the workshop using a
diagnostic tool. Malfunction code retrieval serves
as the basis for detecting and evaluating defects
and inconsistent performance. Data are analyzed
using special diagnostic tool. Following are some of
the common errors that occur
a.
Electrical circuit problem such as intermittent
contact
b.
Component and sensor failure
c.
Sensor signal that deviates from specified
levels
d.
Unusual response and malfunction in the
actuators
Some of the common test which needs to be done
before drive test. This involves a check for the
following:
l
Correct functioning of all input and output
signals of the ECU
l
Correct functioning of wheel speed sensors
l
Correct functioning of all valves and hydraulic
components




